Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1 | /* vi: set sw=4 ts=4: */ |
| 2 | /* |
Erik Andersen | 6acaa40 | 2000-03-26 14:03:20 +0000 | [diff] [blame] | 3 | * lash -- the BusyBox Lame-Ass SHell |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 4 | * |
Eric Andersen | 8ec10a9 | 2001-01-27 09:33:39 +0000 | [diff] [blame] | 5 | * Copyright (C) 1999,2000,2001 by Lineo, inc. |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 6 | * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org> |
| 7 | * |
| 8 | * Based in part on ladsh.c by Michael K. Johnson and Erik W. Troan, which is |
| 9 | * under the following liberal license: "We have placed this source code in the |
| 10 | * public domain. Use it in any project, free or commercial." |
| 11 | * |
| 12 | * This program is free software; you can redistribute it and/or modify |
| 13 | * it under the terms of the GNU General Public License as published by |
| 14 | * the Free Software Foundation; either version 2 of the License, or |
| 15 | * (at your option) any later version. |
| 16 | * |
| 17 | * This program is distributed in the hope that it will be useful, |
| 18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 20 | * General Public License for more details. |
| 21 | * |
| 22 | * You should have received a copy of the GNU General Public License |
| 23 | * along with this program; if not, write to the Free Software |
| 24 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 25 | * |
| 26 | */ |
| 27 | |
Eric Andersen | 8ea28be | 2001-01-05 20:58:22 +0000 | [diff] [blame] | 28 | /* The parsing engine of this program is officially at a dead-end. |
| 29 | * Future work in that direction should move to the work posted |
| 30 | * at http://doolittle.faludi.com/~larry/parser.html . |
| 31 | * A start on the integration of that work with the rest of sh.c |
| 32 | * is at http://codepoet.org/sh.c . |
| 33 | */ |
Eric Andersen | 1e7cea9 | 2000-12-06 23:47:38 +0000 | [diff] [blame] | 34 | // |
Eric Andersen | e9f07fb | 2000-12-21 18:31:36 +0000 | [diff] [blame] | 35 | //This works pretty well now, and is now on by default. |
Eric Andersen | 06f64b2 | 2000-09-19 07:16:39 +0000 | [diff] [blame] | 36 | #define BB_FEATURE_SH_ENVIRONMENT |
Eric Andersen | 1e7cea9 | 2000-12-06 23:47:38 +0000 | [diff] [blame] | 37 | // |
| 38 | //Backtick support has some problems, use at your own risk! |
| 39 | //#define BB_FEATURE_SH_BACKTICKS |
| 40 | // |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 41 | //If, then, else, etc. support.. This should now behave basically |
Eric Andersen | b3d6e2d | 2001-03-13 22:57:56 +0000 | [diff] [blame] | 42 | //like any other Bourne shell -- sortof... |
Eric Andersen | e9f07fb | 2000-12-21 18:31:36 +0000 | [diff] [blame] | 43 | #define BB_FEATURE_SH_IF_EXPRESSIONS |
Eric Andersen | 1e7cea9 | 2000-12-06 23:47:38 +0000 | [diff] [blame] | 44 | // |
Eric Andersen | b3d6e2d | 2001-03-13 22:57:56 +0000 | [diff] [blame] | 45 | /* This is currently sortof broken, only for the brave... */ |
| 46 | #undef HANDLE_CONTINUATION_CHARS |
| 47 | // |
| 48 | /* This would be great -- if wordexp wouldn't strip all quoting |
| 49 | * out from the target strings... As is, a parser needs */ |
| 50 | #undef BB_FEATURE_SH_WORDEXP |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 51 | // |
Eric Andersen | 1e7cea9 | 2000-12-06 23:47:38 +0000 | [diff] [blame] | 52 | //For debugging/development on the shell only... |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 53 | //#define DEBUG_SHELL |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 54 | |
| 55 | |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 56 | #include <stdio.h> |
| 57 | #include <stdlib.h> |
| 58 | #include <ctype.h> |
| 59 | #include <errno.h> |
| 60 | #include <fcntl.h> |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 61 | #include <signal.h> |
| 62 | #include <string.h> |
| 63 | #include <sys/ioctl.h> |
| 64 | #include <sys/wait.h> |
| 65 | #include <unistd.h> |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 66 | #include <getopt.h> |
Mark Whitley | 1c6581a | 2001-03-27 16:35:16 +0000 | [diff] [blame] | 67 | #include <locale.h> |
Eric Andersen | 13d1fa1 | 2001-03-08 23:59:45 +0000 | [diff] [blame] | 68 | |
Eric Andersen | 3417447 | 2001-03-17 00:20:10 +0000 | [diff] [blame] | 69 | //#define BB_FEATURE_SH_WORDEXP |
Eric Andersen | b180dd9 | 2001-03-09 00:42:46 +0000 | [diff] [blame] | 70 | |
Eric Andersen | 3417447 | 2001-03-17 00:20:10 +0000 | [diff] [blame] | 71 | #ifdef BB_FEATURE_SH_WORDEXP |
Eric Andersen | 13d1fa1 | 2001-03-08 23:59:45 +0000 | [diff] [blame] | 72 | #include <wordexp.h> |
| 73 | #define expand_t wordexp_t |
| 74 | #undef BB_FEATURE_SH_BACKTICKS |
| 75 | #else |
| 76 | #include <glob.h> |
| 77 | #define expand_t glob_t |
| 78 | #endif |
Eric Andersen | caeeb36 | 2001-02-20 06:38:44 +0000 | [diff] [blame] | 79 | #include "busybox.h" |
Erik Andersen | f0657d3 | 2000-04-12 17:49:52 +0000 | [diff] [blame] | 80 | #include "cmdedit.h" |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 81 | |
Eric Andersen | 13d1fa1 | 2001-03-08 23:59:45 +0000 | [diff] [blame] | 82 | |
Mark Whitley | 59ab025 | 2001-01-23 22:30:04 +0000 | [diff] [blame] | 83 | static const int MAX_LINE = 256; /* size of input buffer for cwd data */ |
| 84 | static const int MAX_READ = 128; /* size of input buffer for `read' builtin */ |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 85 | #define JOB_STATUS_FORMAT "[%d] %-22s %.40s\n" |
| 86 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 87 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 88 | enum redir_type { REDIRECT_INPUT, REDIRECT_OVERWRITE, |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 89 | REDIRECT_APPEND |
| 90 | }; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 91 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 92 | static const unsigned int DEFAULT_CONTEXT=0x1; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 93 | static const unsigned int IF_TRUE_CONTEXT=0x2; |
| 94 | static const unsigned int IF_FALSE_CONTEXT=0x4; |
| 95 | static const unsigned int THEN_EXP_CONTEXT=0x8; |
| 96 | static const unsigned int ELSE_EXP_CONTEXT=0x10; |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 97 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 98 | |
| 99 | struct jobset { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 100 | struct job *head; /* head of list of running jobs */ |
| 101 | struct job *fg; /* current foreground job */ |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 102 | }; |
| 103 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 104 | struct redir_struct { |
| 105 | enum redir_type type; /* type of redirection */ |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 106 | int fd; /* file descriptor being redirected */ |
| 107 | char *filename; /* file to redirect fd to */ |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 108 | }; |
| 109 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 110 | struct child_prog { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 111 | pid_t pid; /* 0 if exited */ |
| 112 | char **argv; /* program name and arguments */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 113 | int num_redirects; /* elements in redirection array */ |
| 114 | struct redir_struct *redirects; /* I/O redirects */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 115 | int is_stopped; /* is the program currently running? */ |
| 116 | struct job *family; /* pointer back to the child's parent job */ |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 117 | }; |
| 118 | |
| 119 | struct job { |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 120 | int jobid; /* job number */ |
| 121 | int num_progs; /* total number of programs in job */ |
| 122 | int running_progs; /* number of programs running */ |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 123 | char *text; /* name of job */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 124 | char *cmdbuf; /* buffer various argv's point into */ |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 125 | pid_t pgrp; /* process group ID for the job */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 126 | struct child_prog *progs; /* array of programs in job */ |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 127 | struct job *next; /* to track background commands */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 128 | int stopped_progs; /* number of programs alive, but stopped */ |
| 129 | unsigned int job_context; /* bitmask defining current context */ |
| 130 | struct jobset *job_list; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 131 | }; |
| 132 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 133 | struct built_in_command { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 134 | char *cmd; /* name */ |
| 135 | char *descr; /* description */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 136 | int (*function) (struct child_prog *); /* function ptr */ |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 137 | }; |
| 138 | |
Eric Andersen | 8ea28be | 2001-01-05 20:58:22 +0000 | [diff] [blame] | 139 | struct close_me { |
| 140 | int fd; |
| 141 | struct close_me *next; |
| 142 | }; |
| 143 | |
Eric Andersen | 34e1941 | 2000-07-10 18:47:24 +0000 | [diff] [blame] | 144 | /* function prototypes for builtins */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 145 | static int builtin_cd(struct child_prog *cmd); |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 146 | static int builtin_exec(struct child_prog *cmd); |
| 147 | static int builtin_exit(struct child_prog *cmd); |
| 148 | static int builtin_fg_bg(struct child_prog *cmd); |
| 149 | static int builtin_help(struct child_prog *cmd); |
| 150 | static int builtin_jobs(struct child_prog *dummy); |
| 151 | static int builtin_pwd(struct child_prog *dummy); |
| 152 | static int builtin_export(struct child_prog *cmd); |
| 153 | static int builtin_source(struct child_prog *cmd); |
| 154 | static int builtin_unset(struct child_prog *cmd); |
| 155 | static int builtin_read(struct child_prog *cmd); |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 156 | #ifdef BB_FEATURE_SH_IF_EXPRESSIONS |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 157 | static int builtin_if(struct child_prog *cmd); |
| 158 | static int builtin_then(struct child_prog *cmd); |
| 159 | static int builtin_else(struct child_prog *cmd); |
| 160 | static int builtin_fi(struct child_prog *cmd); |
Eric Andersen | 70da6a6 | 2000-12-20 22:59:16 +0000 | [diff] [blame] | 161 | /* function prototypes for shell stuff */ |
| 162 | static int run_command_predicate(char *cmd); |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 163 | #endif |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 164 | |
Eric Andersen | 34e1941 | 2000-07-10 18:47:24 +0000 | [diff] [blame] | 165 | |
| 166 | /* function prototypes for shell stuff */ |
Eric Andersen | 8ea28be | 2001-01-05 20:58:22 +0000 | [diff] [blame] | 167 | static void mark_open(int fd); |
| 168 | static void mark_closed(int fd); |
Eric Andersen | 36278b9 | 2001-03-06 20:47:31 +0000 | [diff] [blame] | 169 | static void close_all(void); |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 170 | static void checkjobs(struct jobset *job_list); |
| 171 | static int get_command(FILE * source, char *command); |
| 172 | static int parse_command(char **command_ptr, struct job *job, int *inbg); |
| 173 | static int run_command(struct job *newjob, int inbg, int outpipe[2]); |
| 174 | static int pseudo_exec(struct child_prog *cmd) __attribute__ ((noreturn)); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 175 | static int busy_loop(FILE * input); |
| 176 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 177 | |
Mark Whitley | 37653aa | 2000-07-12 23:36:17 +0000 | [diff] [blame] | 178 | /* Table of built-in functions (these are non-forking builtins, meaning they |
| 179 | * can change global variables in the parent shell process but they will not |
| 180 | * work with pipes and redirects; 'unset foo | whatever' will not work) */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 181 | static struct built_in_command bltins[] = { |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 182 | {"bg", "Resume a job in the background", builtin_fg_bg}, |
| 183 | {"cd", "Change working directory", builtin_cd}, |
Eric Andersen | d2f5677 | 2000-09-21 02:48:07 +0000 | [diff] [blame] | 184 | {"exec", "Exec command, replacing this shell with the exec'd process", builtin_exec}, |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 185 | {"exit", "Exit from shell()", builtin_exit}, |
| 186 | {"fg", "Bring job into the foreground", builtin_fg_bg}, |
| 187 | {"jobs", "Lists the active jobs", builtin_jobs}, |
| 188 | {"export", "Set environment variable", builtin_export}, |
| 189 | {"unset", "Unset environment variable", builtin_unset}, |
| 190 | {"read", "Input environment variable", builtin_read}, |
Matt Kraai | dd450a0 | 2000-09-13 03:43:36 +0000 | [diff] [blame] | 191 | {".", "Source-in and run commands in a file", builtin_source}, |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 192 | /* to do: add ulimit */ |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 193 | #ifdef BB_FEATURE_SH_IF_EXPRESSIONS |
| 194 | {"if", NULL, builtin_if}, |
| 195 | {"then", NULL, builtin_then}, |
| 196 | {"else", NULL, builtin_else}, |
| 197 | {"fi", NULL, builtin_fi}, |
| 198 | #endif |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 199 | {NULL, NULL, NULL} |
Erik Andersen | 330fd2b | 2000-05-19 05:35:19 +0000 | [diff] [blame] | 200 | }; |
| 201 | |
Mark Whitley | 37653aa | 2000-07-12 23:36:17 +0000 | [diff] [blame] | 202 | /* Table of forking built-in functions (things that fork cannot change global |
| 203 | * variables in the parent process, such as the current working directory) */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 204 | static struct built_in_command bltins_forking[] = { |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 205 | {"pwd", "Print current directory", builtin_pwd}, |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 206 | {"help", "List shell built-in commands", builtin_help}, |
| 207 | {NULL, NULL, NULL} |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 208 | }; |
| 209 | |
Eric Andersen | 0bcc813 | 2001-01-05 19:37:32 +0000 | [diff] [blame] | 210 | |
| 211 | /* Variables we export */ |
| 212 | unsigned int shell_context; /* Used in cmdedit.c to reset the |
| 213 | context when someone hits ^C */ |
| 214 | |
| 215 | |
| 216 | /* Globals that are static to this file */ |
Eric Andersen | 6efc48c | 2000-07-18 08:16:39 +0000 | [diff] [blame] | 217 | static char *cwd; |
Eric Andersen | 744b064 | 2001-01-05 21:23:44 +0000 | [diff] [blame] | 218 | static char *local_pending_command = NULL; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 219 | static struct jobset job_list = { NULL, NULL }; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 220 | static int argc; |
| 221 | static char **argv; |
Eric Andersen | 702ec59 | 2001-03-06 22:17:29 +0000 | [diff] [blame] | 222 | static struct close_me *close_me_head; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 223 | #ifdef BB_FEATURE_SH_ENVIRONMENT |
Eric Andersen | ca60459 | 2001-03-08 17:17:13 +0000 | [diff] [blame] | 224 | static int last_bg_pid; |
| 225 | static int last_return_code; |
| 226 | static int show_x_trace; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 227 | #endif |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 228 | #ifdef BB_FEATURE_SH_IF_EXPRESSIONS |
| 229 | static char syntax_err[]="syntax error near unexpected token"; |
| 230 | #endif |
| 231 | |
Eric Andersen | b3d6e2d | 2001-03-13 22:57:56 +0000 | [diff] [blame] | 232 | static char *PS1; |
| 233 | static char *PS2; |
| 234 | |
| 235 | |
Eric Andersen | b558e76 | 2000-11-30 22:43:16 +0000 | [diff] [blame] | 236 | #ifdef DEBUG_SHELL |
| 237 | static inline void debug_printf(const char *format, ...) |
| 238 | { |
| 239 | va_list args; |
| 240 | va_start(args, format); |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 241 | vfprintf(stderr, format, args); |
Eric Andersen | b558e76 | 2000-11-30 22:43:16 +0000 | [diff] [blame] | 242 | va_end(args); |
| 243 | } |
| 244 | #else |
| 245 | static inline void debug_printf(const char *format, ...) { } |
| 246 | #endif |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 247 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 248 | /* |
| 249 | Most builtins need access to the struct child_prog that has |
| 250 | their arguments, previously coded as cmd->progs[0]. That coding |
| 251 | can exhibit a bug, if the builtin is not the first command in |
| 252 | a pipeline: "echo foo | exec sort" will attempt to exec foo. |
| 253 | |
| 254 | builtin previous use notes |
| 255 | ------ ----------------- --------- |
| 256 | cd cmd->progs[0] |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 257 | exec cmd->progs[0] squashed bug: didn't look for applets or forking builtins |
| 258 | exit cmd->progs[0] |
| 259 | fg_bg cmd->progs[0], job_list->head, job_list->fg |
| 260 | help 0 |
| 261 | jobs job_list->head |
| 262 | pwd 0 |
Eric Andersen | 84e229c | 2001-03-29 22:48:33 +0000 | [diff] [blame] | 263 | export cmd->progs[0] |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 264 | source cmd->progs[0] |
| 265 | unset cmd->progs[0] |
| 266 | read cmd->progs[0] |
| 267 | if cmd->job_context, cmd->text |
| 268 | then cmd->job_context, cmd->text |
| 269 | else cmd->job_context, cmd->text |
| 270 | fi cmd->job_context |
| 271 | |
| 272 | The use of cmd->text by if/then/else/fi is hopelessly hacky. |
| 273 | Would it work to increment cmd->progs[0]->argv and recurse, |
| 274 | somewhat like builtin_exec does? |
| 275 | |
| 276 | I added "struct job *family;" to struct child_prog, |
| 277 | and switched API to builtin_foo(struct child_prog *child); |
| 278 | So cmd->text becomes child->family->text |
| 279 | cmd->job_context becomes child->family->job_context |
| 280 | cmd->progs[0] becomes *child |
| 281 | job_list becomes child->family->job_list |
| 282 | */ |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 283 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 284 | /* built-in 'cd <path>' handler */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 285 | static int builtin_cd(struct child_prog *child) |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 286 | { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 287 | char *newdir; |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 288 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 289 | if (child->argv[1] == NULL) |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 290 | newdir = getenv("HOME"); |
| 291 | else |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 292 | newdir = child->argv[1]; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 293 | if (chdir(newdir)) { |
Eric Andersen | b3d6e2d | 2001-03-13 22:57:56 +0000 | [diff] [blame] | 294 | printf("cd: %s: %m\n", newdir); |
Matt Kraai | 3e856ce | 2000-12-01 02:55:13 +0000 | [diff] [blame] | 295 | return EXIT_FAILURE; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 296 | } |
Eric Andersen | 6efc48c | 2000-07-18 08:16:39 +0000 | [diff] [blame] | 297 | getcwd(cwd, sizeof(char)*MAX_LINE); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 298 | |
Matt Kraai | 3e856ce | 2000-12-01 02:55:13 +0000 | [diff] [blame] | 299 | return EXIT_SUCCESS; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 300 | } |
| 301 | |
Eric Andersen | d2f5677 | 2000-09-21 02:48:07 +0000 | [diff] [blame] | 302 | /* built-in 'exec' handler */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 303 | static int builtin_exec(struct child_prog *child) |
Eric Andersen | d2f5677 | 2000-09-21 02:48:07 +0000 | [diff] [blame] | 304 | { |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 305 | if (child->argv[1] == NULL) |
| 306 | return EXIT_SUCCESS; /* Really? */ |
| 307 | child->argv++; |
Eric Andersen | 07f2f39 | 2001-03-06 20:28:22 +0000 | [diff] [blame] | 308 | close_all(); |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 309 | pseudo_exec(child); |
| 310 | /* never returns */ |
Eric Andersen | d2f5677 | 2000-09-21 02:48:07 +0000 | [diff] [blame] | 311 | } |
| 312 | |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 313 | /* built-in 'exit' handler */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 314 | static int builtin_exit(struct child_prog *child) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 315 | { |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 316 | if (child->argv[1] == NULL) |
Matt Kraai | 3e856ce | 2000-12-01 02:55:13 +0000 | [diff] [blame] | 317 | exit(EXIT_SUCCESS); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 318 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 319 | exit (atoi(child->argv[1])); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 320 | } |
| 321 | |
| 322 | /* built-in 'fg' and 'bg' handler */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 323 | static int builtin_fg_bg(struct child_prog *child) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 324 | { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 325 | int i, jobNum; |
Erik Andersen | 6273f65 | 2000-03-17 01:12:41 +0000 | [diff] [blame] | 326 | struct job *job=NULL; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 327 | |
Eric Andersen | e9f07fb | 2000-12-21 18:31:36 +0000 | [diff] [blame] | 328 | if (!child->argv[1] || child->argv[2]) { |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 329 | error_msg("%s: exactly one argument is expected", |
Eric Andersen | e9f07fb | 2000-12-21 18:31:36 +0000 | [diff] [blame] | 330 | child->argv[0]); |
| 331 | return EXIT_FAILURE; |
| 332 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 333 | |
Eric Andersen | e9f07fb | 2000-12-21 18:31:36 +0000 | [diff] [blame] | 334 | if (sscanf(child->argv[1], "%%%d", &jobNum) != 1) { |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 335 | error_msg("%s: bad argument '%s'", |
Eric Andersen | e9f07fb | 2000-12-21 18:31:36 +0000 | [diff] [blame] | 336 | child->argv[0], child->argv[1]); |
| 337 | return EXIT_FAILURE; |
| 338 | } |
| 339 | |
| 340 | for (job = child->family->job_list->head; job; job = job->next) { |
| 341 | if (job->jobid == jobNum) { |
| 342 | break; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 343 | } |
Eric Andersen | e9f07fb | 2000-12-21 18:31:36 +0000 | [diff] [blame] | 344 | } |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 345 | |
| 346 | if (!job) { |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 347 | error_msg("%s: unknown job %d", |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 348 | child->argv[0], jobNum); |
Matt Kraai | 3e856ce | 2000-12-01 02:55:13 +0000 | [diff] [blame] | 349 | return EXIT_FAILURE; |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 350 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 351 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 352 | if (*child->argv[0] == 'f') { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 353 | /* Make this job the foreground job */ |
Eric Andersen | 1c314ad | 2000-06-28 16:56:25 +0000 | [diff] [blame] | 354 | /* suppress messages when run from /linuxrc mag@sysgo.de */ |
| 355 | if (tcsetpgrp(0, job->pgrp) && errno != ENOTTY) |
Matt Kraai | a9819b2 | 2000-12-22 01:48:07 +0000 | [diff] [blame] | 356 | perror_msg("tcsetpgrp"); |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 357 | child->family->job_list->fg = job; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 358 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 359 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 360 | /* Restart the processes in the job */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 361 | for (i = 0; i < job->num_progs; i++) |
| 362 | job->progs[i].is_stopped = 0; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 363 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 364 | kill(-job->pgrp, SIGCONT); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 365 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 366 | job->stopped_progs = 0; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 367 | |
Matt Kraai | 3e856ce | 2000-12-01 02:55:13 +0000 | [diff] [blame] | 368 | return EXIT_SUCCESS; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 369 | } |
| 370 | |
| 371 | /* built-in 'help' handler */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 372 | static int builtin_help(struct child_prog *dummy) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 373 | { |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 374 | struct built_in_command *x; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 375 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 376 | printf("\nBuilt-in commands:\n"); |
| 377 | printf("-------------------\n"); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 378 | for (x = bltins; x->cmd; x++) { |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 379 | if (x->descr==NULL) |
| 380 | continue; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 381 | printf("%s\t%s\n", x->cmd, x->descr); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 382 | } |
Erik Andersen | 330fd2b | 2000-05-19 05:35:19 +0000 | [diff] [blame] | 383 | for (x = bltins_forking; x->cmd; x++) { |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 384 | if (x->descr==NULL) |
| 385 | continue; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 386 | printf("%s\t%s\n", x->cmd, x->descr); |
Erik Andersen | 330fd2b | 2000-05-19 05:35:19 +0000 | [diff] [blame] | 387 | } |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 388 | printf("\n\n"); |
Matt Kraai | 3e856ce | 2000-12-01 02:55:13 +0000 | [diff] [blame] | 389 | return EXIT_SUCCESS; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 390 | } |
| 391 | |
| 392 | /* built-in 'jobs' handler */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 393 | static int builtin_jobs(struct child_prog *child) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 394 | { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 395 | struct job *job; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 396 | char *status_string; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 397 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 398 | for (job = child->family->job_list->head; job; job = job->next) { |
| 399 | if (job->running_progs == job->stopped_progs) |
| 400 | status_string = "Stopped"; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 401 | else |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 402 | status_string = "Running"; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 403 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 404 | printf(JOB_STATUS_FORMAT, job->jobid, status_string, job->text); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 405 | } |
Matt Kraai | 3e856ce | 2000-12-01 02:55:13 +0000 | [diff] [blame] | 406 | return EXIT_SUCCESS; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 407 | } |
| 408 | |
| 409 | |
| 410 | /* built-in 'pwd' handler */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 411 | static int builtin_pwd(struct child_prog *dummy) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 412 | { |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 413 | getcwd(cwd, MAX_LINE); |
Eric Andersen | 6f65a3a | 2001-01-20 01:10:07 +0000 | [diff] [blame] | 414 | printf( "%s\n", cwd); |
Matt Kraai | 3e856ce | 2000-12-01 02:55:13 +0000 | [diff] [blame] | 415 | return EXIT_SUCCESS; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 416 | } |
| 417 | |
Erik Andersen | 6273f65 | 2000-03-17 01:12:41 +0000 | [diff] [blame] | 418 | /* built-in 'export VAR=value' handler */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 419 | static int builtin_export(struct child_prog *child) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 420 | { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 421 | int res; |
Eric Andersen | b3d6e2d | 2001-03-13 22:57:56 +0000 | [diff] [blame] | 422 | char *v = child->argv[1]; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 423 | |
Eric Andersen | b3d6e2d | 2001-03-13 22:57:56 +0000 | [diff] [blame] | 424 | if (v == NULL) { |
Eric Andersen | 84e229c | 2001-03-29 22:48:33 +0000 | [diff] [blame] | 425 | char **e; |
| 426 | for (e = environ; *e; e++) { |
| 427 | printf( "%s\n", *e); |
| 428 | } |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 429 | } |
Eric Andersen | b3d6e2d | 2001-03-13 22:57:56 +0000 | [diff] [blame] | 430 | res = putenv(v); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 431 | if (res) |
Eric Andersen | b3d6e2d | 2001-03-13 22:57:56 +0000 | [diff] [blame] | 432 | fprintf(stderr, "export: %m\n"); |
Mark Whitley | f594986 | 2001-03-14 00:29:14 +0000 | [diff] [blame] | 433 | #ifndef BB_FEATURE_SH_SIMPLE_PROMPT |
Eric Andersen | b3d6e2d | 2001-03-13 22:57:56 +0000 | [diff] [blame] | 434 | if (strncmp(v, "PS1=", 4)==0) |
| 435 | PS1 = getenv("PS1"); |
| 436 | else if (strncmp(v, "PS2=", 4)==0) |
| 437 | PS2 = getenv("PS2"); |
| 438 | #endif |
Mark Whitley | 1c6581a | 2001-03-27 16:35:16 +0000 | [diff] [blame] | 439 | if(strncmp(v, "LC_ALL=", 7)==0) |
| 440 | setlocale(LC_ALL, getenv("LC_ALL")); |
Mark Whitley | a82a003 | 2001-03-27 17:07:15 +0000 | [diff] [blame] | 441 | if(strncmp(v, "LC_CTYPE=", 9)==0) |
Mark Whitley | 1c6581a | 2001-03-27 16:35:16 +0000 | [diff] [blame] | 442 | setlocale(LC_CTYPE, getenv("LC_CTYPE")); |
| 443 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 444 | return (res); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 445 | } |
| 446 | |
Eric Andersen | b54833c | 2000-07-03 23:56:26 +0000 | [diff] [blame] | 447 | /* built-in 'read VAR' handler */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 448 | static int builtin_read(struct child_prog *child) |
Eric Andersen | b54833c | 2000-07-03 23:56:26 +0000 | [diff] [blame] | 449 | { |
| 450 | int res = 0, len, newlen; |
| 451 | char *s; |
| 452 | char string[MAX_READ]; |
| 453 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 454 | if (child->argv[1]) { |
Eric Andersen | b54833c | 2000-07-03 23:56:26 +0000 | [diff] [blame] | 455 | /* argument (VAR) given: put "VAR=" into buffer */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 456 | strcpy(string, child->argv[1]); |
Eric Andersen | b54833c | 2000-07-03 23:56:26 +0000 | [diff] [blame] | 457 | len = strlen(string); |
| 458 | string[len++] = '='; |
| 459 | string[len] = '\0'; |
| 460 | fgets(&string[len], sizeof(string) - len, stdin); /* read string */ |
| 461 | newlen = strlen(string); |
| 462 | if(newlen > len) |
| 463 | string[--newlen] = '\0'; /* chomp trailing newline */ |
| 464 | /* |
| 465 | ** string should now contain "VAR=<value>" |
| 466 | ** copy it (putenv() won't do that, so we must make sure |
| 467 | ** the string resides in a static buffer!) |
| 468 | */ |
| 469 | res = -1; |
| 470 | if((s = strdup(string))) |
| 471 | res = putenv(s); |
| 472 | if (res) |
Eric Andersen | b3d6e2d | 2001-03-13 22:57:56 +0000 | [diff] [blame] | 473 | fprintf(stderr, "read: %m\n"); |
Eric Andersen | b54833c | 2000-07-03 23:56:26 +0000 | [diff] [blame] | 474 | } |
| 475 | else |
| 476 | fgets(string, sizeof(string), stdin); |
| 477 | |
| 478 | return (res); |
| 479 | } |
| 480 | |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 481 | #ifdef BB_FEATURE_SH_IF_EXPRESSIONS |
| 482 | /* Built-in handler for 'if' commands */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 483 | static int builtin_if(struct child_prog *child) |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 484 | { |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 485 | struct job *cmd = child->family; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 486 | int status; |
| 487 | char* charptr1=cmd->text+3; /* skip over the leading 'if ' */ |
| 488 | |
| 489 | /* Now run the 'if' command */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 490 | debug_printf( "job=%p entering builtin_if ('%s')-- context=%d\n", cmd, charptr1, cmd->job_context); |
| 491 | status = run_command_predicate(charptr1); |
| 492 | debug_printf( "if test returned "); |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 493 | if (status == 0) { |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 494 | debug_printf( "TRUE\n"); |
| 495 | cmd->job_context |= IF_TRUE_CONTEXT; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 496 | } else { |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 497 | debug_printf( "FALSE\n"); |
| 498 | cmd->job_context |= IF_FALSE_CONTEXT; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 499 | } |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 500 | debug_printf("job=%p builtin_if set job context to %x\n", cmd, cmd->job_context); |
| 501 | shell_context++; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 502 | |
| 503 | return status; |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 504 | } |
| 505 | |
| 506 | /* Built-in handler for 'then' (part of the 'if' command) */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 507 | static int builtin_then(struct child_prog *child) |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 508 | { |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 509 | struct job *cmd = child->family; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 510 | char* charptr1=cmd->text+5; /* skip over the leading 'then ' */ |
| 511 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 512 | debug_printf( "job=%p entering builtin_then ('%s')-- context=%d\n", cmd, charptr1, cmd->job_context); |
| 513 | if (! (cmd->job_context & (IF_TRUE_CONTEXT|IF_FALSE_CONTEXT))) { |
| 514 | shell_context = 0; /* Reset the shell's context on an error */ |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 515 | error_msg("%s `then'", syntax_err); |
Matt Kraai | 3e856ce | 2000-12-01 02:55:13 +0000 | [diff] [blame] | 516 | return EXIT_FAILURE; |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 517 | } |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 518 | |
| 519 | cmd->job_context |= THEN_EXP_CONTEXT; |
| 520 | debug_printf("job=%p builtin_then set job context to %x\n", cmd, cmd->job_context); |
| 521 | |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 522 | /* If the if result was FALSE, skip the 'then' stuff */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 523 | if (cmd->job_context & IF_FALSE_CONTEXT) { |
Matt Kraai | 3e856ce | 2000-12-01 02:55:13 +0000 | [diff] [blame] | 524 | return EXIT_SUCCESS; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 525 | } |
| 526 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 527 | /* Seems the if result was TRUE, so run the 'then' command */ |
| 528 | debug_printf( "'then' now running '%s'\n", charptr1); |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 529 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 530 | return(run_command_predicate(charptr1)); |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 531 | } |
| 532 | |
| 533 | /* Built-in handler for 'else' (part of the 'if' command) */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 534 | static int builtin_else(struct child_prog *child) |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 535 | { |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 536 | struct job *cmd = child->family; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 537 | char* charptr1=cmd->text+5; /* skip over the leading 'else ' */ |
| 538 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 539 | debug_printf( "job=%p entering builtin_else ('%s')-- context=%d\n", cmd, charptr1, cmd->job_context); |
| 540 | |
| 541 | if (! (cmd->job_context & THEN_EXP_CONTEXT)) { |
| 542 | shell_context = 0; /* Reset the shell's context on an error */ |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 543 | error_msg("%s `else'", syntax_err); |
Matt Kraai | 3e856ce | 2000-12-01 02:55:13 +0000 | [diff] [blame] | 544 | return EXIT_FAILURE; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 545 | } |
| 546 | /* If the if result was TRUE, skip the 'else' stuff */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 547 | if (cmd->job_context & IF_TRUE_CONTEXT) { |
Matt Kraai | 3e856ce | 2000-12-01 02:55:13 +0000 | [diff] [blame] | 548 | return EXIT_SUCCESS; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 549 | } |
| 550 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 551 | cmd->job_context |= ELSE_EXP_CONTEXT; |
Eric Andersen | e9f07fb | 2000-12-21 18:31:36 +0000 | [diff] [blame] | 552 | debug_printf("job=%p builtin_else set job context to %x\n", cmd, cmd->job_context); |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 553 | |
| 554 | /* Now run the 'else' command */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 555 | debug_printf( "'else' now running '%s'\n", charptr1); |
| 556 | return(run_command_predicate(charptr1)); |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 557 | } |
| 558 | |
| 559 | /* Built-in handler for 'fi' (part of the 'if' command) */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 560 | static int builtin_fi(struct child_prog *child) |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 561 | { |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 562 | struct job *cmd = child->family; |
| 563 | debug_printf( "job=%p entering builtin_fi ('%s')-- context=%d\n", cmd, "", cmd->job_context); |
| 564 | if (! (cmd->job_context & (IF_TRUE_CONTEXT|IF_FALSE_CONTEXT))) { |
| 565 | shell_context = 0; /* Reset the shell's context on an error */ |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 566 | error_msg("%s `fi'", syntax_err); |
Matt Kraai | 3e856ce | 2000-12-01 02:55:13 +0000 | [diff] [blame] | 567 | return EXIT_FAILURE; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 568 | } |
| 569 | /* Clear out the if and then context bits */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 570 | cmd->job_context &= ~(IF_TRUE_CONTEXT|IF_FALSE_CONTEXT|THEN_EXP_CONTEXT|ELSE_EXP_CONTEXT); |
| 571 | debug_printf("job=%p builtin_fi set job context to %x\n", cmd, cmd->job_context); |
| 572 | shell_context--; |
Matt Kraai | 3e856ce | 2000-12-01 02:55:13 +0000 | [diff] [blame] | 573 | return EXIT_SUCCESS; |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 574 | } |
| 575 | #endif |
| 576 | |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 577 | /* Built-in '.' handler (read-in and execute commands from file) */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 578 | static int builtin_source(struct child_prog *child) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 579 | { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 580 | FILE *input; |
| 581 | int status; |
Eric Andersen | 8ea28be | 2001-01-05 20:58:22 +0000 | [diff] [blame] | 582 | int fd; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 583 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 584 | if (child->argv[1] == NULL) |
Matt Kraai | 3e856ce | 2000-12-01 02:55:13 +0000 | [diff] [blame] | 585 | return EXIT_FAILURE; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 586 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 587 | input = fopen(child->argv[1], "r"); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 588 | if (!input) { |
Eric Andersen | 6f65a3a | 2001-01-20 01:10:07 +0000 | [diff] [blame] | 589 | printf( "Couldn't open file '%s'\n", child->argv[1]); |
Matt Kraai | 3e856ce | 2000-12-01 02:55:13 +0000 | [diff] [blame] | 590 | return EXIT_FAILURE; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 591 | } |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 592 | |
Eric Andersen | 8ea28be | 2001-01-05 20:58:22 +0000 | [diff] [blame] | 593 | fd=fileno(input); |
| 594 | mark_open(fd); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 595 | /* Now run the file */ |
| 596 | status = busy_loop(input); |
Matt Kraai | dd450a0 | 2000-09-13 03:43:36 +0000 | [diff] [blame] | 597 | fclose(input); |
Eric Andersen | 8ea28be | 2001-01-05 20:58:22 +0000 | [diff] [blame] | 598 | mark_closed(fd); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 599 | return (status); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 600 | } |
| 601 | |
| 602 | /* built-in 'unset VAR' handler */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 603 | static int builtin_unset(struct child_prog *child) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 604 | { |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 605 | if (child->argv[1] == NULL) { |
Eric Andersen | 6f65a3a | 2001-01-20 01:10:07 +0000 | [diff] [blame] | 606 | printf( "unset: parameter required.\n"); |
Matt Kraai | 3e856ce | 2000-12-01 02:55:13 +0000 | [diff] [blame] | 607 | return EXIT_FAILURE; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 608 | } |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 609 | unsetenv(child->argv[1]); |
Matt Kraai | 3e856ce | 2000-12-01 02:55:13 +0000 | [diff] [blame] | 610 | return EXIT_SUCCESS; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 611 | } |
| 612 | |
Eric Andersen | 70da6a6 | 2000-12-20 22:59:16 +0000 | [diff] [blame] | 613 | #ifdef BB_FEATURE_SH_IF_EXPRESSIONS |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 614 | /* currently used by if/then/else. |
Eric Andersen | e9f07fb | 2000-12-21 18:31:36 +0000 | [diff] [blame] | 615 | * |
| 616 | * Reparsing the command line for this purpose is gross, |
| 617 | * incorrect, and fundamentally unfixable; in particular, |
| 618 | * think about what happens with command substitution. |
| 619 | * We really need to pull out the run, wait, return status |
| 620 | * functionality out of busy_loop so we can child->argv++ |
| 621 | * and use that, without going back through parse_command. |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 622 | */ |
| 623 | static int run_command_predicate(char *cmd) |
| 624 | { |
| 625 | int n=strlen(cmd); |
| 626 | local_pending_command = xmalloc(n+1); |
| 627 | strncpy(local_pending_command, cmd, n); |
| 628 | local_pending_command[n]='\0'; |
| 629 | return( busy_loop(NULL)); |
| 630 | } |
Eric Andersen | 70da6a6 | 2000-12-20 22:59:16 +0000 | [diff] [blame] | 631 | #endif |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 632 | |
Eric Andersen | 8ea28be | 2001-01-05 20:58:22 +0000 | [diff] [blame] | 633 | static void mark_open(int fd) |
| 634 | { |
| 635 | struct close_me *new = xmalloc(sizeof(struct close_me)); |
| 636 | new->fd = fd; |
| 637 | new->next = close_me_head; |
| 638 | close_me_head = new; |
| 639 | } |
| 640 | |
| 641 | static void mark_closed(int fd) |
| 642 | { |
| 643 | struct close_me *tmp; |
| 644 | if (close_me_head == NULL || close_me_head->fd != fd) |
| 645 | error_msg_and_die("corrupt close_me"); |
| 646 | tmp = close_me_head; |
| 647 | close_me_head = close_me_head->next; |
| 648 | free(tmp); |
| 649 | } |
| 650 | |
| 651 | static void close_all() |
| 652 | { |
Eric Andersen | 702ec59 | 2001-03-06 22:17:29 +0000 | [diff] [blame] | 653 | struct close_me *c, *tmp; |
| 654 | for (c=close_me_head; c; c=tmp) { |
| 655 | close(c->fd); |
| 656 | tmp=c->next; |
| 657 | free(c); |
Eric Andersen | 8ea28be | 2001-01-05 20:58:22 +0000 | [diff] [blame] | 658 | } |
| 659 | close_me_head = NULL; |
| 660 | } |
| 661 | |
| 662 | |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 663 | /* free up all memory from a job */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 664 | static void free_job(struct job *cmd) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 665 | { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 666 | int i; |
Mark Whitley | 44a9914 | 2001-03-14 17:26:37 +0000 | [diff] [blame] | 667 | struct jobset *keep; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 668 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 669 | for (i = 0; i < cmd->num_progs; i++) { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 670 | free(cmd->progs[i].argv); |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 671 | if (cmd->progs[i].redirects) |
| 672 | free(cmd->progs[i].redirects); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 673 | } |
Mark Whitley | 44a9914 | 2001-03-14 17:26:37 +0000 | [diff] [blame] | 674 | if (cmd->progs) |
| 675 | free(cmd->progs); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 676 | if (cmd->text) |
| 677 | free(cmd->text); |
Mark Whitley | 44a9914 | 2001-03-14 17:26:37 +0000 | [diff] [blame] | 678 | if (cmd->cmdbuf) |
| 679 | free(cmd->cmdbuf); |
| 680 | keep = cmd->job_list; |
Eric Andersen | ec10b9d | 2000-07-14 01:13:11 +0000 | [diff] [blame] | 681 | memset(cmd, 0, sizeof(struct job)); |
Mark Whitley | 44a9914 | 2001-03-14 17:26:37 +0000 | [diff] [blame] | 682 | cmd->job_list = keep; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 683 | } |
| 684 | |
Eric Andersen | 1ca20a7 | 2001-03-21 07:34:27 +0000 | [diff] [blame] | 685 | /* remove a job from a jobset */ |
| 686 | static void remove_job(struct jobset *j_list, struct job *job) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 687 | { |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 688 | struct job *prevjob; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 689 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 690 | free_job(job); |
Eric Andersen | 1ca20a7 | 2001-03-21 07:34:27 +0000 | [diff] [blame] | 691 | if (job == j_list->head) { |
| 692 | j_list->head = job->next; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 693 | } else { |
Eric Andersen | 1ca20a7 | 2001-03-21 07:34:27 +0000 | [diff] [blame] | 694 | prevjob = j_list->head; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 695 | while (prevjob->next != job) |
| 696 | prevjob = prevjob->next; |
| 697 | prevjob->next = job->next; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 698 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 699 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 700 | free(job); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 701 | } |
| 702 | |
| 703 | /* Checks to see if any background processes have exited -- if they |
| 704 | have, figure out why and see if a job has completed */ |
Eric Andersen | 1ca20a7 | 2001-03-21 07:34:27 +0000 | [diff] [blame] | 705 | static void checkjobs(struct jobset *j_list) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 706 | { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 707 | struct job *job; |
| 708 | pid_t childpid; |
| 709 | int status; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 710 | int prognum = 0; |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 711 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 712 | while ((childpid = waitpid(-1, &status, WNOHANG | WUNTRACED)) > 0) { |
Eric Andersen | 1ca20a7 | 2001-03-21 07:34:27 +0000 | [diff] [blame] | 713 | for (job = j_list->head; job; job = job->next) { |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 714 | prognum = 0; |
| 715 | while (prognum < job->num_progs && |
| 716 | job->progs[prognum].pid != childpid) prognum++; |
| 717 | if (prognum < job->num_progs) |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 718 | break; |
| 719 | } |
| 720 | |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 721 | /* This happens on backticked commands */ |
| 722 | if(job==NULL) |
| 723 | return; |
| 724 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 725 | if (WIFEXITED(status) || WIFSIGNALED(status)) { |
| 726 | /* child exited */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 727 | job->running_progs--; |
| 728 | job->progs[prognum].pid = 0; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 729 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 730 | if (!job->running_progs) { |
| 731 | printf(JOB_STATUS_FORMAT, job->jobid, "Done", job->text); |
Eric Andersen | 1ca20a7 | 2001-03-21 07:34:27 +0000 | [diff] [blame] | 732 | remove_job(j_list, job); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 733 | } |
| 734 | } else { |
| 735 | /* child stopped */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 736 | job->stopped_progs++; |
| 737 | job->progs[prognum].is_stopped = 1; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 738 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 739 | if (job->stopped_progs == job->num_progs) { |
| 740 | printf(JOB_STATUS_FORMAT, job->jobid, "Stopped", |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 741 | job->text); |
| 742 | } |
| 743 | } |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 744 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 745 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 746 | if (childpid == -1 && errno != ECHILD) |
Matt Kraai | a9819b2 | 2000-12-22 01:48:07 +0000 | [diff] [blame] | 747 | perror_msg("waitpid"); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 748 | } |
| 749 | |
Eric Andersen | e9f07fb | 2000-12-21 18:31:36 +0000 | [diff] [blame] | 750 | /* squirrel != NULL means we squirrel away copies of stdin, stdout, |
| 751 | * and stderr if they are redirected. */ |
| 752 | static int setup_redirects(struct child_prog *prog, int squirrel[]) |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 753 | { |
| 754 | int i; |
| 755 | int openfd; |
| 756 | int mode = O_RDONLY; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 757 | struct redir_struct *redir = prog->redirects; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 758 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 759 | for (i = 0; i < prog->num_redirects; i++, redir++) { |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 760 | switch (redir->type) { |
| 761 | case REDIRECT_INPUT: |
| 762 | mode = O_RDONLY; |
| 763 | break; |
| 764 | case REDIRECT_OVERWRITE: |
Eric Andersen | 46f0beb | 2000-11-14 21:59:22 +0000 | [diff] [blame] | 765 | mode = O_WRONLY | O_CREAT | O_TRUNC; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 766 | break; |
| 767 | case REDIRECT_APPEND: |
Eric Andersen | 46f0beb | 2000-11-14 21:59:22 +0000 | [diff] [blame] | 768 | mode = O_WRONLY | O_CREAT | O_APPEND; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 769 | break; |
| 770 | } |
| 771 | |
| 772 | openfd = open(redir->filename, mode, 0666); |
| 773 | if (openfd < 0) { |
| 774 | /* this could get lost if stderr has been redirected, but |
| 775 | bash and ash both lose it as well (though zsh doesn't!) */ |
Eric Andersen | b3d6e2d | 2001-03-13 22:57:56 +0000 | [diff] [blame] | 776 | perror_msg("error opening %s", redir->filename); |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 777 | return 1; |
| 778 | } |
| 779 | |
| 780 | if (openfd != redir->fd) { |
Eric Andersen | e9f07fb | 2000-12-21 18:31:36 +0000 | [diff] [blame] | 781 | if (squirrel && redir->fd < 3) { |
| 782 | squirrel[redir->fd] = dup(redir->fd); |
| 783 | } |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 784 | dup2(openfd, redir->fd); |
| 785 | close(openfd); |
| 786 | } |
| 787 | } |
| 788 | |
| 789 | return 0; |
| 790 | } |
| 791 | |
Eric Andersen | e9f07fb | 2000-12-21 18:31:36 +0000 | [diff] [blame] | 792 | static void restore_redirects(int squirrel[]) |
| 793 | { |
| 794 | int i, fd; |
| 795 | for (i=0; i<3; i++) { |
| 796 | fd = squirrel[i]; |
| 797 | if (fd != -1) { |
| 798 | /* No error checking. I sure wouldn't know what |
| 799 | * to do with an error if I found one! */ |
| 800 | dup2(fd, i); |
| 801 | close(fd); |
| 802 | } |
| 803 | } |
| 804 | } |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 805 | |
Eric Andersen | b3d6e2d | 2001-03-13 22:57:56 +0000 | [diff] [blame] | 806 | static inline void cmdedit_set_initial_prompt(void) |
Eric Andersen | 22332fd | 2001-01-30 23:40:39 +0000 | [diff] [blame] | 807 | { |
Mark Whitley | f594986 | 2001-03-14 00:29:14 +0000 | [diff] [blame] | 808 | #ifdef BB_FEATURE_SH_SIMPLE_PROMPT |
Eric Andersen | b3d6e2d | 2001-03-13 22:57:56 +0000 | [diff] [blame] | 809 | PS1 = NULL; |
| 810 | PS2 = "> "; |
Eric Andersen | 22332fd | 2001-01-30 23:40:39 +0000 | [diff] [blame] | 811 | #else |
Eric Andersen | b3d6e2d | 2001-03-13 22:57:56 +0000 | [diff] [blame] | 812 | PS1 = getenv("PS1"); |
| 813 | if(PS1==0) { |
| 814 | PS1 = "\\w \\$ "; |
Eric Andersen | 09acc06 | 2001-01-04 11:10:38 +0000 | [diff] [blame] | 815 | } |
Eric Andersen | b3d6e2d | 2001-03-13 22:57:56 +0000 | [diff] [blame] | 816 | PS2 = getenv("PS2"); |
| 817 | if(PS2==0) |
| 818 | PS2 = "> "; |
| 819 | #endif |
Eric Andersen | 09acc06 | 2001-01-04 11:10:38 +0000 | [diff] [blame] | 820 | } |
| 821 | |
Eric Andersen | b3d6e2d | 2001-03-13 22:57:56 +0000 | [diff] [blame] | 822 | static inline void setup_prompt_string(char **prompt_str) |
| 823 | { |
Mark Whitley | f594986 | 2001-03-14 00:29:14 +0000 | [diff] [blame] | 824 | #ifdef BB_FEATURE_SH_SIMPLE_PROMPT |
Eric Andersen | b3d6e2d | 2001-03-13 22:57:56 +0000 | [diff] [blame] | 825 | /* Set up the prompt */ |
| 826 | if (shell_context == 0) { |
| 827 | if (PS1) |
| 828 | free(PS1); |
| 829 | PS1=xmalloc(strlen(cwd)+4); |
| 830 | sprintf(PS1, "%s %s", cwd, ( geteuid() != 0 ) ? "$ ":"# "); |
| 831 | *prompt_str = PS1; |
| 832 | } else { |
| 833 | *prompt_str = PS2; |
| 834 | } |
| 835 | #else |
| 836 | *prompt_str = (shell_context==0)? PS1 : PS2; |
| 837 | #endif |
| 838 | } |
Eric Andersen | 22332fd | 2001-01-30 23:40:39 +0000 | [diff] [blame] | 839 | |
Eric Andersen | 09acc06 | 2001-01-04 11:10:38 +0000 | [diff] [blame] | 840 | static int get_command(FILE * source, char *command) |
| 841 | { |
| 842 | char *prompt_str; |
Eric Andersen | 8ea28be | 2001-01-05 20:58:22 +0000 | [diff] [blame] | 843 | |
Eric Andersen | 1c314ad | 2000-06-28 16:56:25 +0000 | [diff] [blame] | 844 | if (source == NULL) { |
| 845 | if (local_pending_command) { |
| 846 | /* a command specified (-c option): return it & mark it done */ |
| 847 | strcpy(command, local_pending_command); |
| 848 | free(local_pending_command); |
| 849 | local_pending_command = NULL; |
| 850 | return 0; |
| 851 | } |
| 852 | return 1; |
| 853 | } |
| 854 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 855 | if (source == stdin) { |
Eric Andersen | b3d6e2d | 2001-03-13 22:57:56 +0000 | [diff] [blame] | 856 | setup_prompt_string(&prompt_str); |
Eric Andersen | 8ea28be | 2001-01-05 20:58:22 +0000 | [diff] [blame] | 857 | |
Eric Andersen | b3d6e2d | 2001-03-13 22:57:56 +0000 | [diff] [blame] | 858 | #ifdef BB_FEATURE_COMMAND_EDITING |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 859 | /* |
| 860 | ** enable command line editing only while a command line |
| 861 | ** is actually being read; otherwise, we'll end up bequeathing |
| 862 | ** atexit() handlers and other unwanted stuff to our |
| 863 | ** child processes (rob@sysgo.de) |
| 864 | */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 865 | cmdedit_read_input(prompt_str, command); |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 866 | cmdedit_terminate(); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 867 | return 0; |
Erik Andersen | c7c634b | 2000-03-19 05:28:55 +0000 | [diff] [blame] | 868 | #else |
Eric Andersen | 8ea28be | 2001-01-05 20:58:22 +0000 | [diff] [blame] | 869 | fputs(prompt_str, stdout); |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 870 | #endif |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 871 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 872 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 873 | if (!fgets(command, BUFSIZ - 2, source)) { |
| 874 | if (source == stdin) |
| 875 | printf("\n"); |
| 876 | return 1; |
| 877 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 878 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 879 | return 0; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 880 | } |
| 881 | |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 882 | #ifdef BB_FEATURE_SH_ENVIRONMENT |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 883 | static char* itoa(register int i) |
| 884 | { |
Eric Andersen | b558e76 | 2000-11-30 22:43:16 +0000 | [diff] [blame] | 885 | static char a[7]; /* Max 7 ints */ |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 886 | register char *b = a + sizeof(a) - 1; |
| 887 | int sign = (i < 0); |
| 888 | |
| 889 | if (sign) |
| 890 | i = -i; |
| 891 | *b = 0; |
| 892 | do |
| 893 | { |
| 894 | *--b = '0' + (i % 10); |
| 895 | i /= 10; |
| 896 | } |
| 897 | while (i); |
| 898 | if (sign) |
| 899 | *--b = '-'; |
| 900 | return b; |
| 901 | } |
Eric Andersen | ca60459 | 2001-03-08 17:17:13 +0000 | [diff] [blame] | 902 | #endif |
| 903 | |
Eric Andersen | b3d6e2d | 2001-03-13 22:57:56 +0000 | [diff] [blame] | 904 | #if defined BB_FEATURE_SH_ENVIRONMENT && ! defined BB_FEATURE_SH_WORDEXP |
Eric Andersen | 1ca20a7 | 2001-03-21 07:34:27 +0000 | [diff] [blame] | 905 | char * strsep_space( char *string, int * ix) |
Eric Andersen | b3d6e2d | 2001-03-13 22:57:56 +0000 | [diff] [blame] | 906 | { |
| 907 | char *token, *begin; |
| 908 | |
| 909 | begin = string; |
| 910 | |
| 911 | /* Short circuit the trivial case */ |
Eric Andersen | 1ca20a7 | 2001-03-21 07:34:27 +0000 | [diff] [blame] | 912 | if ( !string || ! string[*ix]) |
Eric Andersen | b3d6e2d | 2001-03-13 22:57:56 +0000 | [diff] [blame] | 913 | return NULL; |
| 914 | |
| 915 | /* Find the end of the token. */ |
Eric Andersen | 1ca20a7 | 2001-03-21 07:34:27 +0000 | [diff] [blame] | 916 | while( string && string[*ix] && !isspace(string[*ix]) ) { |
| 917 | (*ix)++; |
Eric Andersen | b3d6e2d | 2001-03-13 22:57:56 +0000 | [diff] [blame] | 918 | } |
| 919 | |
| 920 | /* Find the end of any whitespace trailing behind |
| 921 | * the token and let that be part of the token */ |
Eric Andersen | 1ca20a7 | 2001-03-21 07:34:27 +0000 | [diff] [blame] | 922 | while( string && string[*ix] && isspace(string[*ix]) ) { |
| 923 | (*ix)++; |
Eric Andersen | b3d6e2d | 2001-03-13 22:57:56 +0000 | [diff] [blame] | 924 | } |
| 925 | |
Eric Andersen | 1ca20a7 | 2001-03-21 07:34:27 +0000 | [diff] [blame] | 926 | if (! string && *ix==0) { |
Eric Andersen | b3d6e2d | 2001-03-13 22:57:56 +0000 | [diff] [blame] | 927 | /* Nothing useful was found */ |
| 928 | return NULL; |
| 929 | } |
| 930 | |
Eric Andersen | 1ca20a7 | 2001-03-21 07:34:27 +0000 | [diff] [blame] | 931 | token = xmalloc(*ix+1); |
| 932 | token[*ix] = '\0'; |
| 933 | strncpy(token, string, *ix); |
Eric Andersen | b3d6e2d | 2001-03-13 22:57:56 +0000 | [diff] [blame] | 934 | |
| 935 | return token; |
| 936 | } |
| 937 | #endif |
| 938 | |
| 939 | |
Eric Andersen | ca60459 | 2001-03-08 17:17:13 +0000 | [diff] [blame] | 940 | static int expand_arguments(char *command) |
| 941 | { |
| 942 | #ifdef BB_FEATURE_SH_ENVIRONMENT |
Eric Andersen | 13d1fa1 | 2001-03-08 23:59:45 +0000 | [diff] [blame] | 943 | expand_t expand_result; |
Eric Andersen | ca60459 | 2001-03-08 17:17:13 +0000 | [diff] [blame] | 944 | char *src, *dst, *var; |
Eric Andersen | 1ca20a7 | 2001-03-21 07:34:27 +0000 | [diff] [blame] | 945 | int ix = 0; |
Eric Andersen | ca60459 | 2001-03-08 17:17:13 +0000 | [diff] [blame] | 946 | int i=0, length, total_length=0, retval; |
Eric Andersen | 195743f | 2001-03-09 19:21:37 +0000 | [diff] [blame] | 947 | const char *out_of_space = "out of space during expansion"; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 948 | #endif |
| 949 | |
Eric Andersen | ca60459 | 2001-03-08 17:17:13 +0000 | [diff] [blame] | 950 | /* get rid of the terminating \n */ |
| 951 | chomp(command); |
Eric Andersen | b3d6e2d | 2001-03-13 22:57:56 +0000 | [diff] [blame] | 952 | |
| 953 | /* Fix up escape sequences to be the Real Thing(tm) */ |
Eric Andersen | 1ca20a7 | 2001-03-21 07:34:27 +0000 | [diff] [blame] | 954 | while( command && command[ix]) { |
| 955 | if (command[ix] == '\\') { |
| 956 | char *tmp = command+ix+1; |
| 957 | command[ix] = process_escape_sequence( &tmp ); |
| 958 | memmove(command+ix + 1, tmp, strlen(tmp)+1); |
Eric Andersen | b3d6e2d | 2001-03-13 22:57:56 +0000 | [diff] [blame] | 959 | } |
Eric Andersen | 1ca20a7 | 2001-03-21 07:34:27 +0000 | [diff] [blame] | 960 | ix++; |
Eric Andersen | b3d6e2d | 2001-03-13 22:57:56 +0000 | [diff] [blame] | 961 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 962 | |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 963 | #ifdef BB_FEATURE_SH_ENVIRONMENT |
Eric Andersen | ca60459 | 2001-03-08 17:17:13 +0000 | [diff] [blame] | 964 | |
Eric Andersen | 13d1fa1 | 2001-03-08 23:59:45 +0000 | [diff] [blame] | 965 | |
Eric Andersen | 3417447 | 2001-03-17 00:20:10 +0000 | [diff] [blame] | 966 | #ifdef BB_FEATURE_SH_WORDEXP |
Eric Andersen | ca60459 | 2001-03-08 17:17:13 +0000 | [diff] [blame] | 967 | /* This first part uses wordexp() which is a wonderful C lib |
| 968 | * function which expands nearly everything. */ |
Eric Andersen | b3d6e2d | 2001-03-13 22:57:56 +0000 | [diff] [blame] | 969 | retval = wordexp (command, &expand_result, WRDE_SHOWERR); |
Eric Andersen | ca60459 | 2001-03-08 17:17:13 +0000 | [diff] [blame] | 970 | if (retval == WRDE_NOSPACE) { |
| 971 | /* Mem may have been allocated... */ |
Eric Andersen | 13d1fa1 | 2001-03-08 23:59:45 +0000 | [diff] [blame] | 972 | wordfree (&expand_result); |
Eric Andersen | 195743f | 2001-03-09 19:21:37 +0000 | [diff] [blame] | 973 | error_msg(out_of_space); |
Eric Andersen | ca60459 | 2001-03-08 17:17:13 +0000 | [diff] [blame] | 974 | return FALSE; |
| 975 | } |
| 976 | if (retval < 0) { |
| 977 | /* Some other error. */ |
| 978 | error_msg("syntax error"); |
| 979 | return FALSE; |
| 980 | } |
| 981 | |
Eric Andersen | 1365bb7 | 2001-03-10 07:12:12 +0000 | [diff] [blame] | 982 | if (expand_result.we_wordc > 0) { |
| 983 | /* Convert from char** (one word per string) to a simple char*, |
| 984 | * but don't overflow command which is BUFSIZ in length */ |
| 985 | *command = '\0'; |
| 986 | while (i < expand_result.we_wordc && total_length < BUFSIZ) { |
| 987 | length=strlen(expand_result.we_wordv[i])+1; |
| 988 | if (BUFSIZ-total_length-length <= 0) { |
| 989 | error_msg(out_of_space); |
| 990 | return FALSE; |
| 991 | } |
| 992 | strcat(command+total_length, expand_result.we_wordv[i++]); |
| 993 | strcat(command+total_length, " "); |
| 994 | total_length+=length; |
Eric Andersen | ca60459 | 2001-03-08 17:17:13 +0000 | [diff] [blame] | 995 | } |
Eric Andersen | 1365bb7 | 2001-03-10 07:12:12 +0000 | [diff] [blame] | 996 | wordfree (&expand_result); |
Eric Andersen | ca60459 | 2001-03-08 17:17:13 +0000 | [diff] [blame] | 997 | } |
Eric Andersen | 13d1fa1 | 2001-03-08 23:59:45 +0000 | [diff] [blame] | 998 | #else |
| 999 | |
Eric Andersen | 195743f | 2001-03-09 19:21:37 +0000 | [diff] [blame] | 1000 | /* Ok. They don't have a recent glibc and they don't have uClibc. Chances |
| 1001 | * are about 100% they don't have wordexp(). So instead the best we can do |
| 1002 | * is use glob and then fixup environment variables and such ourselves. |
| 1003 | * This is better then nothing, but certainly not perfect */ |
Eric Andersen | 13d1fa1 | 2001-03-08 23:59:45 +0000 | [diff] [blame] | 1004 | |
Eric Andersen | 195743f | 2001-03-09 19:21:37 +0000 | [diff] [blame] | 1005 | /* It turns out that glob is very stupid. We have to feed it one word at a |
| 1006 | * time since it can't cope with a full string. Here we convert command |
| 1007 | * (char*) into cmd (char**, one word per string) */ |
Eric Andersen | 13d1fa1 | 2001-03-08 23:59:45 +0000 | [diff] [blame] | 1008 | { |
| 1009 | |
Eric Andersen | 4e7244e | 2001-03-14 00:49:52 +0000 | [diff] [blame] | 1010 | int flags = GLOB_NOCHECK |
| 1011 | #ifdef GLOB_BRACE |
| 1012 | | GLOB_BRACE |
| 1013 | #endif |
| 1014 | #ifdef GLOB_TILDE |
| 1015 | | GLOB_TILDE |
| 1016 | #endif |
| 1017 | ; |
Eric Andersen | b3d6e2d | 2001-03-13 22:57:56 +0000 | [diff] [blame] | 1018 | char *tmpcmd, *cmd, *cmd_copy; |
Eric Andersen | 13d1fa1 | 2001-03-08 23:59:45 +0000 | [diff] [blame] | 1019 | /* We need a clean copy, so strsep can mess up the copy while |
Eric Andersen | 195743f | 2001-03-09 19:21:37 +0000 | [diff] [blame] | 1020 | * we write stuff into the original (in a minute) */ |
Eric Andersen | 4987bbf | 2001-03-12 21:36:49 +0000 | [diff] [blame] | 1021 | cmd = cmd_copy = strdup(command); |
Eric Andersen | 195743f | 2001-03-09 19:21:37 +0000 | [diff] [blame] | 1022 | *command = '\0'; |
Eric Andersen | 1ca20a7 | 2001-03-21 07:34:27 +0000 | [diff] [blame] | 1023 | for (ix = 0, tmpcmd = cmd; |
| 1024 | (tmpcmd = strsep_space(cmd, &ix)) != NULL; cmd += ix, ix=0) { |
Eric Andersen | 13d1fa1 | 2001-03-08 23:59:45 +0000 | [diff] [blame] | 1025 | if (*tmpcmd == '\0') |
| 1026 | break; |
| 1027 | retval = glob(tmpcmd, flags, NULL, &expand_result); |
Eric Andersen | b3d6e2d | 2001-03-13 22:57:56 +0000 | [diff] [blame] | 1028 | free(tmpcmd); /* Free mem allocated by strsep_space */ |
Eric Andersen | 13d1fa1 | 2001-03-08 23:59:45 +0000 | [diff] [blame] | 1029 | if (retval == GLOB_NOSPACE) { |
| 1030 | /* Mem may have been allocated... */ |
| 1031 | globfree (&expand_result); |
Eric Andersen | 195743f | 2001-03-09 19:21:37 +0000 | [diff] [blame] | 1032 | error_msg(out_of_space); |
Eric Andersen | 13d1fa1 | 2001-03-08 23:59:45 +0000 | [diff] [blame] | 1033 | return FALSE; |
Eric Andersen | 195743f | 2001-03-09 19:21:37 +0000 | [diff] [blame] | 1034 | } else if (retval != 0) { |
| 1035 | /* Some other error. GLOB_NOMATCH shouldn't |
| 1036 | * happen because of the GLOB_NOCHECK flag in |
| 1037 | * the glob call. */ |
Eric Andersen | 13d1fa1 | 2001-03-08 23:59:45 +0000 | [diff] [blame] | 1038 | error_msg("syntax error"); |
| 1039 | return FALSE; |
Eric Andersen | 195743f | 2001-03-09 19:21:37 +0000 | [diff] [blame] | 1040 | } else { |
Eric Andersen | 13d1fa1 | 2001-03-08 23:59:45 +0000 | [diff] [blame] | 1041 | /* Convert from char** (one word per string) to a simple char*, |
| 1042 | * but don't overflow command which is BUFSIZ in length */ |
Eric Andersen | 195743f | 2001-03-09 19:21:37 +0000 | [diff] [blame] | 1043 | for (i=0; i < expand_result.gl_pathc; i++) { |
Eric Andersen | 1ef9268 | 2001-03-14 19:33:45 +0000 | [diff] [blame] | 1044 | length=strlen(expand_result.gl_pathv[i]); |
Eric Andersen | 4aaefc2 | 2001-03-15 23:01:19 +0000 | [diff] [blame] | 1045 | if (total_length+length+1 >= BUFSIZ) { |
Eric Andersen | 195743f | 2001-03-09 19:21:37 +0000 | [diff] [blame] | 1046 | error_msg(out_of_space); |
Eric Andersen | 13d1fa1 | 2001-03-08 23:59:45 +0000 | [diff] [blame] | 1047 | return FALSE; |
| 1048 | } |
Eric Andersen | 4aaefc2 | 2001-03-15 23:01:19 +0000 | [diff] [blame] | 1049 | if (i>0) { |
| 1050 | strcat(command+total_length, " "); |
| 1051 | total_length+=1; |
| 1052 | } |
Eric Andersen | 195743f | 2001-03-09 19:21:37 +0000 | [diff] [blame] | 1053 | strcat(command+total_length, expand_result.gl_pathv[i]); |
Eric Andersen | 13d1fa1 | 2001-03-08 23:59:45 +0000 | [diff] [blame] | 1054 | total_length+=length; |
| 1055 | } |
Eric Andersen | 195743f | 2001-03-09 19:21:37 +0000 | [diff] [blame] | 1056 | globfree (&expand_result); |
Eric Andersen | 13d1fa1 | 2001-03-08 23:59:45 +0000 | [diff] [blame] | 1057 | } |
| 1058 | } |
Eric Andersen | 4987bbf | 2001-03-12 21:36:49 +0000 | [diff] [blame] | 1059 | free(cmd_copy); |
Eric Andersen | 195743f | 2001-03-09 19:21:37 +0000 | [diff] [blame] | 1060 | trim(command); |
Eric Andersen | 13d1fa1 | 2001-03-08 23:59:45 +0000 | [diff] [blame] | 1061 | } |
Eric Andersen | ca60459 | 2001-03-08 17:17:13 +0000 | [diff] [blame] | 1062 | |
Eric Andersen | 13d1fa1 | 2001-03-08 23:59:45 +0000 | [diff] [blame] | 1063 | #endif |
Eric Andersen | 195743f | 2001-03-09 19:21:37 +0000 | [diff] [blame] | 1064 | |
Eric Andersen | ca60459 | 2001-03-08 17:17:13 +0000 | [diff] [blame] | 1065 | /* Now do the shell variable substitutions which |
| 1066 | * wordexp can't do for us, namely $? and $! */ |
| 1067 | src = command; |
Eric Andersen | caeeb36 | 2001-02-20 06:38:44 +0000 | [diff] [blame] | 1068 | while((dst = strchr(src,'$')) != NULL){ |
Eric Andersen | 195743f | 2001-03-09 19:21:37 +0000 | [diff] [blame] | 1069 | var = NULL; |
| 1070 | switch(*(dst+1)) { |
| 1071 | case '?': |
| 1072 | var = itoa(last_return_code); |
| 1073 | break; |
| 1074 | case '!': |
| 1075 | if (last_bg_pid==-1) |
| 1076 | *(var)='\0'; |
| 1077 | else |
| 1078 | var = itoa(last_bg_pid); |
| 1079 | break; |
Eric Andersen | 32f8c17 | 2001-03-08 17:44:37 +0000 | [diff] [blame] | 1080 | /* Everything else like $$, $#, $[0-9], etc should all be |
| 1081 | * expanded by wordexp(), so we can in theory skip that stuff |
| 1082 | * here, but just to be on the safe side (i.e. since uClibc |
| 1083 | * wordexp doesn't do this stuff yet), lets leave it in for |
| 1084 | * now. */ |
Eric Andersen | 195743f | 2001-03-09 19:21:37 +0000 | [diff] [blame] | 1085 | case '$': |
| 1086 | var = itoa(getpid()); |
| 1087 | break; |
| 1088 | case '#': |
| 1089 | var = itoa(argc-1); |
| 1090 | break; |
| 1091 | case '0':case '1':case '2':case '3':case '4': |
| 1092 | case '5':case '6':case '7':case '8':case '9': |
| 1093 | { |
Eric Andersen | 1ca20a7 | 2001-03-21 07:34:27 +0000 | [diff] [blame] | 1094 | int ixx=*(dst + 1)-48; |
| 1095 | if (ixx >= argc) { |
Eric Andersen | 195743f | 2001-03-09 19:21:37 +0000 | [diff] [blame] | 1096 | var='\0'; |
| 1097 | } else { |
Eric Andersen | 1ca20a7 | 2001-03-21 07:34:27 +0000 | [diff] [blame] | 1098 | var = argv[ixx]; |
Eric Andersen | 32f8c17 | 2001-03-08 17:44:37 +0000 | [diff] [blame] | 1099 | } |
Eric Andersen | 195743f | 2001-03-09 19:21:37 +0000 | [diff] [blame] | 1100 | } |
| 1101 | break; |
Eric Andersen | 32f8c17 | 2001-03-08 17:44:37 +0000 | [diff] [blame] | 1102 | |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 1103 | } |
Eric Andersen | caeeb36 | 2001-02-20 06:38:44 +0000 | [diff] [blame] | 1104 | if (var) { |
Eric Andersen | 195743f | 2001-03-09 19:21:37 +0000 | [diff] [blame] | 1105 | /* a single character construction was found, and |
| 1106 | * already handled in the case statement */ |
| 1107 | src=dst+2; |
Eric Andersen | 32f8c17 | 2001-03-08 17:44:37 +0000 | [diff] [blame] | 1108 | } else { |
Eric Andersen | 195743f | 2001-03-09 19:21:37 +0000 | [diff] [blame] | 1109 | /* Looks like an environment variable */ |
| 1110 | char delim_hold; |
Eric Andersen | 3417447 | 2001-03-17 00:20:10 +0000 | [diff] [blame] | 1111 | int num_skip_chars=0; |
Eric Andersen | 74e056b | 2001-03-09 20:34:46 +0000 | [diff] [blame] | 1112 | int dstlen = strlen(dst); |
| 1113 | /* Is this a ${foo} type variable? */ |
| 1114 | if (dstlen >=2 && *(dst+1) == '{') { |
| 1115 | src=strchr(dst+1, '}'); |
Eric Andersen | 3417447 | 2001-03-17 00:20:10 +0000 | [diff] [blame] | 1116 | num_skip_chars=1; |
Eric Andersen | 74e056b | 2001-03-09 20:34:46 +0000 | [diff] [blame] | 1117 | } else { |
Eric Andersen | 3417447 | 2001-03-17 00:20:10 +0000 | [diff] [blame] | 1118 | src=dst+1; |
| 1119 | while(isalnum(*src) || *src=='_') src++; |
Eric Andersen | 74e056b | 2001-03-09 20:34:46 +0000 | [diff] [blame] | 1120 | } |
Eric Andersen | 195743f | 2001-03-09 19:21:37 +0000 | [diff] [blame] | 1121 | if (src == NULL) { |
Eric Andersen | 74e056b | 2001-03-09 20:34:46 +0000 | [diff] [blame] | 1122 | src = dst+dstlen; |
Eric Andersen | 32f8c17 | 2001-03-08 17:44:37 +0000 | [diff] [blame] | 1123 | } |
Eric Andersen | 195743f | 2001-03-09 19:21:37 +0000 | [diff] [blame] | 1124 | delim_hold=*src; |
| 1125 | *src='\0'; /* temporary */ |
Eric Andersen | 3417447 | 2001-03-17 00:20:10 +0000 | [diff] [blame] | 1126 | var = getenv(dst + 1 + num_skip_chars); |
Eric Andersen | 195743f | 2001-03-09 19:21:37 +0000 | [diff] [blame] | 1127 | *src=delim_hold; |
Eric Andersen | 3417447 | 2001-03-17 00:20:10 +0000 | [diff] [blame] | 1128 | src += num_skip_chars; |
Eric Andersen | 195743f | 2001-03-09 19:21:37 +0000 | [diff] [blame] | 1129 | } |
| 1130 | if (var == NULL) { |
| 1131 | /* Seems we got an un-expandable variable. So delete it. */ |
| 1132 | var = ""; |
| 1133 | } |
| 1134 | { |
| 1135 | int subst_len = strlen(var); |
| 1136 | int trail_len = strlen(src); |
| 1137 | if (dst+subst_len+trail_len >= command+BUFSIZ) { |
| 1138 | error_msg(out_of_space); |
| 1139 | return FALSE; |
| 1140 | } |
| 1141 | /* Move stuff to the end of the string to accommodate |
| 1142 | * filling the created gap with the new stuff */ |
Eric Andersen | 3417447 | 2001-03-17 00:20:10 +0000 | [diff] [blame] | 1143 | memmove(dst+subst_len, src, trail_len+1); |
Eric Andersen | 195743f | 2001-03-09 19:21:37 +0000 | [diff] [blame] | 1144 | /* Now copy in the new stuff */ |
| 1145 | memcpy(dst, var, subst_len); |
| 1146 | src = dst+subst_len; |
Eric Andersen | caeeb36 | 2001-02-20 06:38:44 +0000 | [diff] [blame] | 1147 | } |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 1148 | } |
Eric Andersen | ca60459 | 2001-03-08 17:17:13 +0000 | [diff] [blame] | 1149 | |
| 1150 | #endif |
| 1151 | return TRUE; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1152 | } |
| 1153 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1154 | /* Return cmd->num_progs as 0 if no command is present (e.g. an empty |
| 1155 | line). If a valid command is found, command_ptr is set to point to |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1156 | the beginning of the next command (if the original command had more |
| 1157 | then one job associated with it) or NULL if no more commands are |
| 1158 | present. */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1159 | static int parse_command(char **command_ptr, struct job *job, int *inbg) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1160 | { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1161 | char *command; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1162 | char *return_command = NULL; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1163 | char *src, *buf, *chptr; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 1164 | int argc_l = 0; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1165 | int done = 0; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1166 | int argv_alloced; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1167 | int i; |
| 1168 | char quote = '\0'; |
| 1169 | int count; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1170 | struct child_prog *prog; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1171 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1172 | /* skip leading white space */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1173 | while (**command_ptr && isspace(**command_ptr)) |
| 1174 | (*command_ptr)++; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1175 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1176 | /* this handles empty lines or leading '#' characters */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1177 | if (!**command_ptr || (**command_ptr == '#')) { |
| 1178 | job->num_progs=0; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1179 | return 0; |
| 1180 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1181 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1182 | *inbg = 0; |
| 1183 | job->num_progs = 1; |
Eric Andersen | ec10b9d | 2000-07-14 01:13:11 +0000 | [diff] [blame] | 1184 | job->progs = xmalloc(sizeof(*job->progs)); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1185 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1186 | /* We set the argv elements to point inside of this string. The |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1187 | memory is freed by free_job(). Allocate twice the original |
Eric Andersen | b54833c | 2000-07-03 23:56:26 +0000 | [diff] [blame] | 1188 | length in case we need to quote every single character. |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1189 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1190 | Getting clean memory relieves us of the task of NULL |
| 1191 | terminating things and makes the rest of this look a bit |
| 1192 | cleaner (though it is, admittedly, a tad less efficient) */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1193 | job->cmdbuf = command = xcalloc(2*strlen(*command_ptr) + 1, sizeof(char)); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1194 | job->text = NULL; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1195 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1196 | prog = job->progs; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1197 | prog->num_redirects = 0; |
| 1198 | prog->redirects = NULL; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1199 | prog->is_stopped = 0; |
| 1200 | prog->family = job; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1201 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1202 | argv_alloced = 5; |
| 1203 | prog->argv = xmalloc(sizeof(*prog->argv) * argv_alloced); |
| 1204 | prog->argv[0] = job->cmdbuf; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1205 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1206 | buf = command; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1207 | src = *command_ptr; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1208 | while (*src && !done) { |
| 1209 | if (quote == *src) { |
| 1210 | quote = '\0'; |
| 1211 | } else if (quote) { |
| 1212 | if (*src == '\\') { |
| 1213 | src++; |
| 1214 | if (!*src) { |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 1215 | error_msg("character expected after \\"); |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1216 | free_job(job); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1217 | return 1; |
| 1218 | } |
| 1219 | |
| 1220 | /* in shell, "\'" should yield \' */ |
Eric Andersen | b2356f6 | 2000-12-11 19:14:40 +0000 | [diff] [blame] | 1221 | if (*src != quote) { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1222 | *buf++ = '\\'; |
Eric Andersen | b2356f6 | 2000-12-11 19:14:40 +0000 | [diff] [blame] | 1223 | *buf++ = '\\'; |
| 1224 | } |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1225 | } else if (*src == '*' || *src == '?' || *src == '[' || |
| 1226 | *src == ']') *buf++ = '\\'; |
| 1227 | *buf++ = *src; |
| 1228 | } else if (isspace(*src)) { |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 1229 | if (*prog->argv[argc_l]) { |
| 1230 | buf++, argc_l++; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1231 | /* +1 here leaves room for the NULL which ends argv */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1232 | if ((argc_l + 1) == argv_alloced) { |
| 1233 | argv_alloced += 5; |
Matt Kraai | b890752 | 2000-09-13 02:08:21 +0000 | [diff] [blame] | 1234 | prog->argv = xrealloc(prog->argv, |
| 1235 | sizeof(*prog->argv) * |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1236 | argv_alloced); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1237 | } |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 1238 | prog->argv[argc_l] = buf; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1239 | } |
| 1240 | } else |
| 1241 | switch (*src) { |
| 1242 | case '"': |
| 1243 | case '\'': |
| 1244 | quote = *src; |
| 1245 | break; |
| 1246 | |
| 1247 | case '#': /* comment */ |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 1248 | if (*(src-1)== '$') |
| 1249 | *buf++ = *src; |
| 1250 | else |
| 1251 | done = 1; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1252 | break; |
| 1253 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1254 | case '>': /* redirects */ |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1255 | case '<': |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1256 | i = prog->num_redirects++; |
| 1257 | prog->redirects = xrealloc(prog->redirects, |
| 1258 | sizeof(*prog->redirects) * |
Matt Kraai | b890752 | 2000-09-13 02:08:21 +0000 | [diff] [blame] | 1259 | (i + 1)); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1260 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1261 | prog->redirects[i].fd = -1; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 1262 | if (buf != prog->argv[argc_l]) { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1263 | /* the stuff before this character may be the file number |
| 1264 | being redirected */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1265 | prog->redirects[i].fd = |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 1266 | strtol(prog->argv[argc_l], &chptr, 10); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1267 | |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 1268 | if (*chptr && *prog->argv[argc_l]) { |
| 1269 | buf++, argc_l++; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 1270 | prog->argv[argc_l] = buf; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1271 | } |
| 1272 | } |
| 1273 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1274 | if (prog->redirects[i].fd == -1) { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1275 | if (*src == '>') |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1276 | prog->redirects[i].fd = 1; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1277 | else |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1278 | prog->redirects[i].fd = 0; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1279 | } |
| 1280 | |
| 1281 | if (*src++ == '>') { |
| 1282 | if (*src == '>') |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1283 | prog->redirects[i].type = |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1284 | REDIRECT_APPEND, src++; |
| 1285 | else |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1286 | prog->redirects[i].type = REDIRECT_OVERWRITE; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1287 | } else { |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1288 | prog->redirects[i].type = REDIRECT_INPUT; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1289 | } |
| 1290 | |
| 1291 | /* This isn't POSIX sh compliant. Oh well. */ |
| 1292 | chptr = src; |
| 1293 | while (isspace(*chptr)) |
| 1294 | chptr++; |
| 1295 | |
| 1296 | if (!*chptr) { |
Mark Whitley | 44a9914 | 2001-03-14 17:26:37 +0000 | [diff] [blame] | 1297 | error_msg("file name expected after %c", *(src-1)); |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1298 | free_job(job); |
| 1299 | job->num_progs=0; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1300 | return 1; |
| 1301 | } |
| 1302 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1303 | prog->redirects[i].filename = buf; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1304 | while (*chptr && !isspace(*chptr)) |
| 1305 | *buf++ = *chptr++; |
| 1306 | |
| 1307 | src = chptr - 1; /* we src++ later */ |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 1308 | prog->argv[argc_l] = ++buf; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1309 | break; |
| 1310 | |
| 1311 | case '|': /* pipe */ |
| 1312 | /* finish this command */ |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 1313 | if (*prog->argv[argc_l]) |
| 1314 | argc_l++; |
| 1315 | if (!argc_l) { |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 1316 | error_msg("empty command in pipe"); |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1317 | free_job(job); |
| 1318 | job->num_progs=0; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1319 | return 1; |
| 1320 | } |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 1321 | prog->argv[argc_l] = NULL; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1322 | |
| 1323 | /* and start the next */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1324 | job->num_progs++; |
Matt Kraai | b890752 | 2000-09-13 02:08:21 +0000 | [diff] [blame] | 1325 | job->progs = xrealloc(job->progs, |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1326 | sizeof(*job->progs) * job->num_progs); |
| 1327 | prog = job->progs + (job->num_progs - 1); |
| 1328 | prog->num_redirects = 0; |
| 1329 | prog->redirects = NULL; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1330 | prog->is_stopped = 0; |
| 1331 | prog->family = job; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 1332 | argc_l = 0; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1333 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1334 | argv_alloced = 5; |
| 1335 | prog->argv = xmalloc(sizeof(*prog->argv) * argv_alloced); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1336 | prog->argv[0] = ++buf; |
| 1337 | |
| 1338 | src++; |
| 1339 | while (*src && isspace(*src)) |
| 1340 | src++; |
| 1341 | |
| 1342 | if (!*src) { |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 1343 | error_msg("empty command in pipe"); |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1344 | free_job(job); |
| 1345 | job->num_progs=0; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1346 | return 1; |
| 1347 | } |
| 1348 | src--; /* we'll ++ it at the end of the loop */ |
| 1349 | |
| 1350 | break; |
| 1351 | |
| 1352 | case '&': /* background */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1353 | *inbg = 1; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1354 | case ';': /* multiple commands */ |
| 1355 | done = 1; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1356 | return_command = *command_ptr + (src - *command_ptr) + 1; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1357 | break; |
| 1358 | |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 1359 | #ifdef BB_FEATURE_SH_BACKTICKS |
Eric Andersen | ec10b9d | 2000-07-14 01:13:11 +0000 | [diff] [blame] | 1360 | case '`': |
| 1361 | /* Exec a backtick-ed command */ |
Eric Andersen | 8ea28be | 2001-01-05 20:58:22 +0000 | [diff] [blame] | 1362 | /* Besides any previous brokenness, I have not |
| 1363 | * updated backtick handling for close_me support. |
| 1364 | * I don't know if it needs it or not. -- LRD */ |
Eric Andersen | ec10b9d | 2000-07-14 01:13:11 +0000 | [diff] [blame] | 1365 | { |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 1366 | char* charptr1=NULL, *charptr2; |
Eric Andersen | ec10b9d | 2000-07-14 01:13:11 +0000 | [diff] [blame] | 1367 | char* ptr=NULL; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1368 | struct job *newjob; |
| 1369 | struct jobset njob_list = { NULL, NULL }; |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 1370 | int pipefd[2]; |
| 1371 | int size; |
Eric Andersen | ec10b9d | 2000-07-14 01:13:11 +0000 | [diff] [blame] | 1372 | |
| 1373 | ptr=strchr(++src, '`'); |
| 1374 | if (ptr==NULL) { |
| 1375 | fprintf(stderr, "Unmatched '`' in command\n"); |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1376 | free_job(job); |
Eric Andersen | ec10b9d | 2000-07-14 01:13:11 +0000 | [diff] [blame] | 1377 | return 1; |
| 1378 | } |
| 1379 | |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 1380 | /* Make some space to hold just the backticked command */ |
Eric Andersen | 6efc48c | 2000-07-18 08:16:39 +0000 | [diff] [blame] | 1381 | charptr1 = charptr2 = xmalloc(1+ptr-src); |
Matt Kraai | 0b2da46 | 2000-09-19 06:46:44 +0000 | [diff] [blame] | 1382 | memcpy(charptr1, src, ptr-src); |
| 1383 | charptr1[ptr-src] = '\0'; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1384 | newjob = xmalloc(sizeof(struct job)); |
| 1385 | newjob->job_list = &njob_list; |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 1386 | /* Now parse and run the backticked command */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1387 | if (!parse_command(&charptr1, newjob, inbg) |
| 1388 | && newjob->num_progs) { |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 1389 | pipe(pipefd); |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1390 | run_command(newjob, 0, pipefd); |
Eric Andersen | ec10b9d | 2000-07-14 01:13:11 +0000 | [diff] [blame] | 1391 | } |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1392 | checkjobs(job->job_list); |
| 1393 | free_job(newjob); /* doesn't actually free newjob, |
| 1394 | looks like a memory leak */ |
Eric Andersen | 6efc48c | 2000-07-18 08:16:39 +0000 | [diff] [blame] | 1395 | free(charptr2); |
| 1396 | |
| 1397 | /* Make a copy of any stuff left over in the command |
| 1398 | * line after the second backtick */ |
| 1399 | charptr2 = xmalloc(strlen(ptr)+1); |
| 1400 | memcpy(charptr2, ptr+1, strlen(ptr)); |
| 1401 | |
Eric Andersen | ec10b9d | 2000-07-14 01:13:11 +0000 | [diff] [blame] | 1402 | |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 1403 | /* Copy the output from the backtick-ed command into the |
| 1404 | * command line, making extra room as needed */ |
| 1405 | --src; |
| 1406 | charptr1 = xmalloc(BUFSIZ); |
Mark Whitley | f57c944 | 2000-12-07 19:56:48 +0000 | [diff] [blame] | 1407 | while ( (size=full_read(pipefd[0], charptr1, BUFSIZ-1)) >0) { |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1408 | int newsize=src - *command_ptr + size + 1 + strlen(charptr2); |
| 1409 | if (newsize > BUFSIZ) { |
| 1410 | *command_ptr=xrealloc(*command_ptr, newsize); |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 1411 | } |
| 1412 | memcpy(src, charptr1, size); |
| 1413 | src+=size; |
| 1414 | } |
| 1415 | free(charptr1); |
| 1416 | close(pipefd[0]); |
| 1417 | if (*(src-1)=='\n') |
| 1418 | --src; |
| 1419 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1420 | /* Now paste into the *command_ptr all the stuff |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 1421 | * leftover after the second backtick */ |
Matt Kraai | cbbe4d6 | 2000-09-14 00:26:50 +0000 | [diff] [blame] | 1422 | memcpy(src, charptr2, strlen(charptr2)+1); |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 1423 | free(charptr2); |
| 1424 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1425 | /* Now recursively call parse_command to deal with the new |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 1426 | * and improved version of the command line with the backtick |
| 1427 | * results expanded in place... */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1428 | { |
| 1429 | struct jobset *jl=job->job_list; |
| 1430 | free_job(job); |
| 1431 | job->job_list = jl; |
| 1432 | } |
| 1433 | return(parse_command(command_ptr, job, inbg)); |
Eric Andersen | ec10b9d | 2000-07-14 01:13:11 +0000 | [diff] [blame] | 1434 | } |
| 1435 | break; |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 1436 | #endif // BB_FEATURE_SH_BACKTICKS |
Matt Kraai | 131241f | 2000-09-14 00:43:20 +0000 | [diff] [blame] | 1437 | |
| 1438 | case '\\': |
| 1439 | src++; |
| 1440 | if (!*src) { |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1441 | /* This is currently a little broken... */ |
| 1442 | #ifdef HANDLE_CONTINUATION_CHARS |
| 1443 | /* They fed us a continuation char, so continue reading stuff |
| 1444 | * on the next line, then tack that onto the end of the current |
| 1445 | * command */ |
| 1446 | char *command; |
| 1447 | int newsize; |
| 1448 | printf("erik: found a continue char at EOL...\n"); |
| 1449 | command = (char *) xcalloc(BUFSIZ, sizeof(char)); |
| 1450 | if (get_command(input, command)) { |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 1451 | error_msg("character expected after \\"); |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1452 | free(command); |
| 1453 | free_job(job); |
| 1454 | return 1; |
| 1455 | } |
| 1456 | newsize = strlen(*command_ptr) + strlen(command) + 2; |
| 1457 | if (newsize > BUFSIZ) { |
| 1458 | printf("erik: doing realloc\n"); |
| 1459 | *command_ptr=xrealloc(*command_ptr, newsize); |
| 1460 | } |
| 1461 | printf("erik: A: *command_ptr='%s'\n", *command_ptr); |
| 1462 | memcpy(--src, command, strlen(command)); |
| 1463 | printf("erik: B: *command_ptr='%s'\n", *command_ptr); |
| 1464 | free(command); |
| 1465 | break; |
| 1466 | #else |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 1467 | error_msg("character expected after \\"); |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1468 | free_job(job); |
Matt Kraai | 131241f | 2000-09-14 00:43:20 +0000 | [diff] [blame] | 1469 | return 1; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1470 | #endif |
Matt Kraai | 131241f | 2000-09-14 00:43:20 +0000 | [diff] [blame] | 1471 | } |
| 1472 | if (*src == '*' || *src == '[' || *src == ']' |
| 1473 | || *src == '?') *buf++ = '\\'; |
| 1474 | /* fallthrough */ |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1475 | default: |
| 1476 | *buf++ = *src; |
| 1477 | } |
| 1478 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 1479 | src++; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1480 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1481 | |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 1482 | if (*prog->argv[argc_l]) { |
| 1483 | argc_l++; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1484 | } |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 1485 | if (!argc_l) { |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1486 | free_job(job); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1487 | return 0; |
| 1488 | } |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 1489 | prog->argv[argc_l] = NULL; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1490 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1491 | if (!return_command) { |
| 1492 | job->text = xmalloc(strlen(*command_ptr) + 1); |
| 1493 | strcpy(job->text, *command_ptr); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1494 | } else { |
| 1495 | /* This leaves any trailing spaces, which is a bit sloppy */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1496 | count = return_command - *command_ptr; |
Eric Andersen | ec10b9d | 2000-07-14 01:13:11 +0000 | [diff] [blame] | 1497 | job->text = xmalloc(count + 1); |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1498 | strncpy(job->text, *command_ptr, count); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1499 | job->text[count] = '\0'; |
| 1500 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1501 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1502 | *command_ptr = return_command; |
Eric Andersen | 46f0beb | 2000-11-14 21:59:22 +0000 | [diff] [blame] | 1503 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 1504 | return 0; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1505 | } |
| 1506 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1507 | /* Run the child_prog, no matter what kind of command it uses. |
| 1508 | */ |
| 1509 | static int pseudo_exec(struct child_prog *child) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1510 | { |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1511 | struct built_in_command *x; |
Eric Andersen | b54833c | 2000-07-03 23:56:26 +0000 | [diff] [blame] | 1512 | #ifdef BB_FEATURE_SH_STANDALONE_SHELL |
Eric Andersen | af4ac77 | 2001-02-01 22:43:49 +0000 | [diff] [blame] | 1513 | char *name; |
Erik Andersen | bcd6177 | 2000-05-13 06:33:19 +0000 | [diff] [blame] | 1514 | #endif |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1515 | |
Eric Andersen | e9f07fb | 2000-12-21 18:31:36 +0000 | [diff] [blame] | 1516 | /* Check if the command matches any of the non-forking builtins. |
| 1517 | * Depending on context, this might be redundant. But it's |
| 1518 | * easier to waste a few CPU cycles than it is to figure out |
| 1519 | * if this is one of those cases. |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1520 | */ |
Eric Andersen | e9f07fb | 2000-12-21 18:31:36 +0000 | [diff] [blame] | 1521 | for (x = bltins; x->cmd; x++) { |
| 1522 | if (strcmp(child->argv[0], x->cmd) == 0 ) { |
| 1523 | exit(x->function(child)); |
| 1524 | } |
| 1525 | } |
| 1526 | |
| 1527 | /* Check if the command matches any of the forking builtins. */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1528 | for (x = bltins_forking; x->cmd; x++) { |
| 1529 | if (strcmp(child->argv[0], x->cmd) == 0) { |
| 1530 | applet_name=x->cmd; |
| 1531 | exit (x->function(child)); |
| 1532 | } |
| 1533 | } |
| 1534 | #ifdef BB_FEATURE_SH_STANDALONE_SHELL |
| 1535 | /* Check if the command matches any busybox internal |
| 1536 | * commands ("applets") here. Following discussions from |
| 1537 | * November 2000 on busybox@opensource.lineo.com, don't use |
| 1538 | * get_last_path_component(). This way explicit (with |
| 1539 | * slashes) filenames will never be interpreted as an |
| 1540 | * applet, just like with builtins. This way the user can |
| 1541 | * override an applet with an explicit filename reference. |
| 1542 | * The only downside to this change is that an explicit |
| 1543 | * /bin/foo invocation will fork and exec /bin/foo, even if |
| 1544 | * /bin/foo is a symlink to busybox. |
| 1545 | */ |
Matt Kraai | f2cc276 | 2001-02-01 19:21:20 +0000 | [diff] [blame] | 1546 | name = child->argv[0]; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1547 | |
| 1548 | #ifdef BB_FEATURE_SH_APPLETS_ALWAYS_WIN |
| 1549 | /* If you enable BB_FEATURE_SH_APPLETS_ALWAYS_WIN, then |
| 1550 | * if you run /bin/cat, it will use BusyBox cat even if |
| 1551 | * /bin/cat exists on the filesystem and is _not_ busybox. |
| 1552 | * Some systems want this, others do not. Choose wisely. :-) |
| 1553 | */ |
Matt Kraai | f2cc276 | 2001-02-01 19:21:20 +0000 | [diff] [blame] | 1554 | name = get_last_path_component(name); |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1555 | #endif |
| 1556 | |
Eric Andersen | 67991cf | 2001-02-14 21:23:06 +0000 | [diff] [blame] | 1557 | { |
Eric Andersen | 82ab8da | 2001-03-23 17:06:01 +0000 | [diff] [blame] | 1558 | char** argv_l=child->argv; |
Eric Andersen | 67991cf | 2001-02-14 21:23:06 +0000 | [diff] [blame] | 1559 | int argc_l; |
Eric Andersen | 82ab8da | 2001-03-23 17:06:01 +0000 | [diff] [blame] | 1560 | for(argc_l=0;*argv_l!=NULL; argv_l++, argc_l++); |
Eric Andersen | 67991cf | 2001-02-14 21:23:06 +0000 | [diff] [blame] | 1561 | optind = 1; |
| 1562 | run_applet_by_name(name, argc_l, child->argv); |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1563 | } |
| 1564 | #endif |
| 1565 | |
| 1566 | execvp(child->argv[0], child->argv); |
Eric Andersen | 8ea28be | 2001-01-05 20:58:22 +0000 | [diff] [blame] | 1567 | perror_msg_and_die("%s", child->argv[0]); |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1568 | } |
| 1569 | |
| 1570 | static void insert_job(struct job *newjob, int inbg) |
| 1571 | { |
| 1572 | struct job *thejob; |
Eric Andersen | 1ca20a7 | 2001-03-21 07:34:27 +0000 | [diff] [blame] | 1573 | struct jobset *j_list=newjob->job_list; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1574 | |
| 1575 | /* find the ID for thejob to use */ |
| 1576 | newjob->jobid = 1; |
Eric Andersen | 1ca20a7 | 2001-03-21 07:34:27 +0000 | [diff] [blame] | 1577 | for (thejob = j_list->head; thejob; thejob = thejob->next) |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1578 | if (thejob->jobid >= newjob->jobid) |
| 1579 | newjob->jobid = thejob->jobid + 1; |
| 1580 | |
| 1581 | /* add thejob to the list of running jobs */ |
Eric Andersen | 1ca20a7 | 2001-03-21 07:34:27 +0000 | [diff] [blame] | 1582 | if (!j_list->head) { |
| 1583 | thejob = j_list->head = xmalloc(sizeof(*thejob)); |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1584 | } else { |
Eric Andersen | 1ca20a7 | 2001-03-21 07:34:27 +0000 | [diff] [blame] | 1585 | for (thejob = j_list->head; thejob->next; thejob = thejob->next) /* nothing */; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1586 | thejob->next = xmalloc(sizeof(*thejob)); |
| 1587 | thejob = thejob->next; |
| 1588 | } |
| 1589 | |
| 1590 | *thejob = *newjob; /* physically copy the struct job */ |
| 1591 | thejob->next = NULL; |
| 1592 | thejob->running_progs = thejob->num_progs; |
| 1593 | thejob->stopped_progs = 0; |
| 1594 | |
| 1595 | if (inbg) { |
| 1596 | /* we don't wait for background thejobs to return -- append it |
| 1597 | to the list of backgrounded thejobs and leave it alone */ |
| 1598 | printf("[%d] %d\n", thejob->jobid, |
| 1599 | newjob->progs[newjob->num_progs - 1].pid); |
| 1600 | #ifdef BB_FEATURE_SH_ENVIRONMENT |
| 1601 | last_bg_pid=newjob->progs[newjob->num_progs - 1].pid; |
| 1602 | #endif |
| 1603 | } else { |
| 1604 | newjob->job_list->fg = thejob; |
| 1605 | |
| 1606 | /* move the new process group into the foreground */ |
| 1607 | /* suppress messages when run from /linuxrc mag@sysgo.de */ |
| 1608 | if (tcsetpgrp(0, newjob->pgrp) && errno != ENOTTY) |
Matt Kraai | a9819b2 | 2000-12-22 01:48:07 +0000 | [diff] [blame] | 1609 | perror_msg("tcsetpgrp"); |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1610 | } |
| 1611 | } |
| 1612 | |
| 1613 | static int run_command(struct job *newjob, int inbg, int outpipe[2]) |
| 1614 | { |
| 1615 | /* struct job *thejob; */ |
| 1616 | int i; |
| 1617 | int nextin, nextout; |
| 1618 | int pipefds[2]; /* pipefd[0] is for reading */ |
| 1619 | struct built_in_command *x; |
| 1620 | struct child_prog *child; |
| 1621 | |
Eric Andersen | 6efc48c | 2000-07-18 08:16:39 +0000 | [diff] [blame] | 1622 | nextin = 0, nextout = 1; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1623 | for (i = 0; i < newjob->num_progs; i++) { |
| 1624 | child = & (newjob->progs[i]); |
| 1625 | |
| 1626 | if ((i + 1) < newjob->num_progs) { |
| 1627 | if (pipe(pipefds)<0) perror_msg_and_die("pipe"); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1628 | nextout = pipefds[1]; |
| 1629 | } else { |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1630 | if (outpipe[1]!=-1) { |
| 1631 | nextout = outpipe[1]; |
Eric Andersen | 6efc48c | 2000-07-18 08:16:39 +0000 | [diff] [blame] | 1632 | } else { |
| 1633 | nextout = 1; |
| 1634 | } |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1635 | } |
| 1636 | |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 1637 | #ifdef BB_FEATURE_SH_ENVIRONMENT |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1638 | if (show_x_trace==TRUE) { |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 1639 | int j; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1640 | fputc('+', stderr); |
| 1641 | for (j = 0; child->argv[j]; j++) { |
| 1642 | fputc(' ', stderr); |
| 1643 | fputs(child->argv[j], stderr); |
| 1644 | } |
| 1645 | fputc('\n', stderr); |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 1646 | } |
| 1647 | #endif |
| 1648 | |
Eric Andersen | e9f07fb | 2000-12-21 18:31:36 +0000 | [diff] [blame] | 1649 | /* Check if the command matches any non-forking builtins, |
| 1650 | * but only if this is a simple command. |
| 1651 | * Non-forking builtins within pipes have to fork anyway, |
| 1652 | * and are handled in pseudo_exec. "echo foo | read bar" |
| 1653 | * is doomed to failure, and doesn't work on bash, either. |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1654 | */ |
Eric Andersen | e9f07fb | 2000-12-21 18:31:36 +0000 | [diff] [blame] | 1655 | if (newjob->num_progs == 1) { |
| 1656 | for (x = bltins; x->cmd; x++) { |
| 1657 | if (strcmp(child->argv[0], x->cmd) == 0 ) { |
| 1658 | int squirrel[] = {-1, -1, -1}; |
| 1659 | int rcode; |
| 1660 | setup_redirects(child, squirrel); |
| 1661 | rcode = x->function(child); |
| 1662 | restore_redirects(squirrel); |
| 1663 | return rcode; |
| 1664 | } |
Erik Andersen | 330fd2b | 2000-05-19 05:35:19 +0000 | [diff] [blame] | 1665 | } |
| 1666 | } |
| 1667 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1668 | if (!(child->pid = fork())) { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1669 | signal(SIGTTOU, SIG_DFL); |
| 1670 | |
Eric Andersen | 8ea28be | 2001-01-05 20:58:22 +0000 | [diff] [blame] | 1671 | close_all(); |
| 1672 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1673 | if (outpipe[1]!=-1) { |
| 1674 | close(outpipe[0]); |
Eric Andersen | 6efc48c | 2000-07-18 08:16:39 +0000 | [diff] [blame] | 1675 | } |
| 1676 | if (nextin != 0) { |
| 1677 | dup2(nextin, 0); |
| 1678 | close(nextin); |
| 1679 | } |
| 1680 | |
| 1681 | if (nextout != 1) { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1682 | dup2(nextout, 1); |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1683 | dup2(nextout, 2); /* Really? */ |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1684 | close(nextout); |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 1685 | close(pipefds[0]); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1686 | } |
| 1687 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1688 | /* explicit redirects override pipes */ |
Eric Andersen | e9f07fb | 2000-12-21 18:31:36 +0000 | [diff] [blame] | 1689 | setup_redirects(child,NULL); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1690 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1691 | pseudo_exec(child); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1692 | } |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1693 | if (outpipe[1]!=-1) { |
| 1694 | close(outpipe[1]); |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 1695 | } |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1696 | |
| 1697 | /* put our child in the process group whose leader is the |
| 1698 | first process in this pipe */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1699 | setpgid(child->pid, newjob->progs[0].pid); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1700 | if (nextin != 0) |
| 1701 | close(nextin); |
Eric Andersen | 6efc48c | 2000-07-18 08:16:39 +0000 | [diff] [blame] | 1702 | if (nextout != 1) |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1703 | close(nextout); |
| 1704 | |
| 1705 | /* If there isn't another process, nextin is garbage |
| 1706 | but it doesn't matter */ |
| 1707 | nextin = pipefds[0]; |
| 1708 | } |
| 1709 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1710 | newjob->pgrp = newjob->progs[0].pid; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1711 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1712 | insert_job(newjob, inbg); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1713 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1714 | return 0; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1715 | } |
| 1716 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 1717 | static int busy_loop(FILE * input) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1718 | { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1719 | char *command; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1720 | char *next_command = NULL; |
| 1721 | struct job newjob; |
Eric Andersen | 1c314ad | 2000-06-28 16:56:25 +0000 | [diff] [blame] | 1722 | pid_t parent_pgrp; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1723 | int i; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1724 | int inbg; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 1725 | int status; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1726 | newjob.job_list = &job_list; |
| 1727 | newjob.job_context = DEFAULT_CONTEXT; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1728 | |
Eric Andersen | 1c314ad | 2000-06-28 16:56:25 +0000 | [diff] [blame] | 1729 | /* save current owner of TTY so we can restore it on exit */ |
| 1730 | parent_pgrp = tcgetpgrp(0); |
| 1731 | |
Matt Kraai | b890752 | 2000-09-13 02:08:21 +0000 | [diff] [blame] | 1732 | command = (char *) xcalloc(BUFSIZ, sizeof(char)); |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 1733 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1734 | /* don't pay any attention to this signal; it just confuses |
| 1735 | things and isn't really meant for shells anyway */ |
| 1736 | signal(SIGTTOU, SIG_IGN); |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 1737 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1738 | while (1) { |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1739 | if (!job_list.fg) { |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 1740 | /* no job is in the foreground */ |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1741 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 1742 | /* see if any background processes have exited */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1743 | checkjobs(&job_list); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1744 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1745 | if (!next_command) { |
| 1746 | if (get_command(input, command)) |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1747 | break; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1748 | next_command = command; |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 1749 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1750 | |
Eric Andersen | ca60459 | 2001-03-08 17:17:13 +0000 | [diff] [blame] | 1751 | if (expand_arguments(next_command) == FALSE) { |
| 1752 | free(command); |
| 1753 | command = (char *) xcalloc(BUFSIZ, sizeof(char)); |
| 1754 | next_command = NULL; |
| 1755 | continue; |
| 1756 | } |
| 1757 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1758 | if (!parse_command(&next_command, &newjob, &inbg) && |
| 1759 | newjob.num_progs) { |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 1760 | int pipefds[2] = {-1,-1}; |
Eric Andersen | b3d6e2d | 2001-03-13 22:57:56 +0000 | [diff] [blame] | 1761 | debug_printf( "job=%p fed to run_command by busy_loop()'\n", |
| 1762 | &newjob); |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1763 | run_command(&newjob, inbg, pipefds); |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 1764 | } |
| 1765 | else { |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 1766 | free(command); |
Matt Kraai | b890752 | 2000-09-13 02:08:21 +0000 | [diff] [blame] | 1767 | command = (char *) xcalloc(BUFSIZ, sizeof(char)); |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1768 | next_command = NULL; |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 1769 | } |
| 1770 | } else { |
| 1771 | /* a job is running in the foreground; wait for it */ |
| 1772 | i = 0; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1773 | while (!job_list.fg->progs[i].pid || |
| 1774 | job_list.fg->progs[i].is_stopped == 1) i++; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1775 | |
Eric Andersen | 8ea28be | 2001-01-05 20:58:22 +0000 | [diff] [blame] | 1776 | if (waitpid(job_list.fg->progs[i].pid, &status, WUNTRACED)<0) |
| 1777 | perror_msg_and_die("waitpid(%d)",job_list.fg->progs[i].pid); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1778 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 1779 | if (WIFEXITED(status) || WIFSIGNALED(status)) { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1780 | /* the child exited */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1781 | job_list.fg->running_progs--; |
| 1782 | job_list.fg->progs[i].pid = 0; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1783 | |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 1784 | #ifdef BB_FEATURE_SH_ENVIRONMENT |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1785 | last_return_code=WEXITSTATUS(status); |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1786 | debug_printf("'%s' exited -- return code %d\n", |
| 1787 | job_list.fg->text, last_return_code); |
Eric Andersen | b180dd9 | 2001-03-09 00:42:46 +0000 | [diff] [blame] | 1788 | #endif |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1789 | if (!job_list.fg->running_progs) { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1790 | /* child exited */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1791 | remove_job(&job_list, job_list.fg); |
| 1792 | job_list.fg = NULL; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1793 | } |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 1794 | } else { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1795 | /* the child was stopped */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1796 | job_list.fg->stopped_progs++; |
| 1797 | job_list.fg->progs[i].is_stopped = 1; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1798 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1799 | if (job_list.fg->stopped_progs == job_list.fg->running_progs) { |
| 1800 | printf("\n" JOB_STATUS_FORMAT, job_list.fg->jobid, |
| 1801 | "Stopped", job_list.fg->text); |
| 1802 | job_list.fg = NULL; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1803 | } |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 1804 | } |
| 1805 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1806 | if (!job_list.fg) { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1807 | /* move the shell to the foreground */ |
Eric Andersen | 1c314ad | 2000-06-28 16:56:25 +0000 | [diff] [blame] | 1808 | /* suppress messages when run from /linuxrc mag@sysgo.de */ |
| 1809 | if (tcsetpgrp(0, getpid()) && errno != ENOTTY) |
Matt Kraai | a9819b2 | 2000-12-22 01:48:07 +0000 | [diff] [blame] | 1810 | perror_msg("tcsetpgrp"); |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 1811 | } |
| 1812 | } |
| 1813 | } |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1814 | free(command); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1815 | |
Eric Andersen | 1c314ad | 2000-06-28 16:56:25 +0000 | [diff] [blame] | 1816 | /* return controlling TTY back to parent process group before exiting */ |
| 1817 | if (tcsetpgrp(0, parent_pgrp)) |
Matt Kraai | a9819b2 | 2000-12-22 01:48:07 +0000 | [diff] [blame] | 1818 | perror_msg("tcsetpgrp"); |
Eric Andersen | b54833c | 2000-07-03 23:56:26 +0000 | [diff] [blame] | 1819 | |
| 1820 | /* return exit status if called with "-c" */ |
| 1821 | if (input == NULL && WIFEXITED(status)) |
| 1822 | return WEXITSTATUS(status); |
| 1823 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1824 | return 0; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1825 | } |
| 1826 | |
| 1827 | |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 1828 | #ifdef BB_FEATURE_CLEAN_UP |
| 1829 | void free_memory(void) |
| 1830 | { |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 1831 | if (cwd) |
| 1832 | free(cwd); |
| 1833 | if (local_pending_command) |
| 1834 | free(local_pending_command); |
| 1835 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1836 | if (job_list.fg && !job_list.fg->running_progs) { |
| 1837 | remove_job(&job_list, job_list.fg); |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 1838 | } |
| 1839 | } |
| 1840 | #endif |
| 1841 | |
Eric Andersen | 6efc48c | 2000-07-18 08:16:39 +0000 | [diff] [blame] | 1842 | |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 1843 | int shell_main(int argc_l, char **argv_l) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1844 | { |
Eric Andersen | 6a4c33c | 2000-07-28 17:08:36 +0000 | [diff] [blame] | 1845 | int opt, interactive=FALSE; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1846 | FILE *input = stdin; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 1847 | argc = argc_l; |
| 1848 | argv = argv_l; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1849 | |
Eric Andersen | 702ec59 | 2001-03-06 22:17:29 +0000 | [diff] [blame] | 1850 | /* These variables need re-initializing when recursing */ |
Eric Andersen | b0970d4 | 2001-01-05 19:34:52 +0000 | [diff] [blame] | 1851 | shell_context = 0; |
| 1852 | cwd=NULL; |
Eric Andersen | b0970d4 | 2001-01-05 19:34:52 +0000 | [diff] [blame] | 1853 | local_pending_command = NULL; |
Eric Andersen | 702ec59 | 2001-03-06 22:17:29 +0000 | [diff] [blame] | 1854 | close_me_head = NULL; |
Eric Andersen | b0970d4 | 2001-01-05 19:34:52 +0000 | [diff] [blame] | 1855 | job_list.head = NULL; |
| 1856 | job_list.fg = NULL; |
| 1857 | #ifdef BB_FEATURE_SH_ENVIRONMENT |
Eric Andersen | ca60459 | 2001-03-08 17:17:13 +0000 | [diff] [blame] | 1858 | last_bg_pid=1; |
| 1859 | last_return_code=1; |
Eric Andersen | b0970d4 | 2001-01-05 19:34:52 +0000 | [diff] [blame] | 1860 | show_x_trace=FALSE; |
| 1861 | #endif |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 1862 | |
Eric Andersen | b558e76 | 2000-11-30 22:43:16 +0000 | [diff] [blame] | 1863 | if (argv[0] && argv[0][0] == '-') { |
Eric Andersen | 8ea28be | 2001-01-05 20:58:22 +0000 | [diff] [blame] | 1864 | FILE *prof_input; |
| 1865 | prof_input = fopen("/etc/profile", "r"); |
| 1866 | if (!prof_input) { |
Eric Andersen | 6f65a3a | 2001-01-20 01:10:07 +0000 | [diff] [blame] | 1867 | printf( "Couldn't open file '/etc/profile'\n"); |
Eric Andersen | 8ea28be | 2001-01-05 20:58:22 +0000 | [diff] [blame] | 1868 | } else { |
| 1869 | int tmp_fd = fileno(prof_input); |
| 1870 | mark_open(tmp_fd); |
| 1871 | /* Now run the file */ |
| 1872 | busy_loop(prof_input); |
| 1873 | fclose(prof_input); |
| 1874 | mark_closed(tmp_fd); |
| 1875 | } |
Eric Andersen | b558e76 | 2000-11-30 22:43:16 +0000 | [diff] [blame] | 1876 | } |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 1877 | |
Eric Andersen | f21aa84 | 2000-12-08 20:50:30 +0000 | [diff] [blame] | 1878 | while ((opt = getopt(argc_l, argv_l, "cxi")) > 0) { |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 1879 | switch (opt) { |
| 1880 | case 'c': |
| 1881 | input = NULL; |
Matt Kraai | 6085c72 | 2000-09-06 01:46:18 +0000 | [diff] [blame] | 1882 | if (local_pending_command != 0) |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 1883 | error_msg_and_die("multiple -c arguments"); |
Matt Kraai | 6085c72 | 2000-09-06 01:46:18 +0000 | [diff] [blame] | 1884 | local_pending_command = xstrdup(argv[optind]); |
| 1885 | optind++; |
| 1886 | argv = argv+optind; |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 1887 | break; |
Eric Andersen | 1428c4f | 2000-07-28 15:19:30 +0000 | [diff] [blame] | 1888 | #ifdef BB_FEATURE_SH_ENVIRONMENT |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 1889 | case 'x': |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1890 | show_x_trace = TRUE; |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 1891 | break; |
Eric Andersen | 1428c4f | 2000-07-28 15:19:30 +0000 | [diff] [blame] | 1892 | #endif |
Eric Andersen | 6a4c33c | 2000-07-28 17:08:36 +0000 | [diff] [blame] | 1893 | case 'i': |
| 1894 | interactive = TRUE; |
| 1895 | break; |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 1896 | default: |
Eric Andersen | 67991cf | 2001-02-14 21:23:06 +0000 | [diff] [blame] | 1897 | show_usage(); |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 1898 | } |
| 1899 | } |
Eric Andersen | 6a4c33c | 2000-07-28 17:08:36 +0000 | [diff] [blame] | 1900 | /* A shell is interactive if the `-i' flag was given, or if all of |
| 1901 | * the following conditions are met: |
| 1902 | * no -c command |
| 1903 | * no arguments remaining or the -s flag given |
| 1904 | * standard input is a terminal |
| 1905 | * standard output is a terminal |
| 1906 | * Refer to Posix.2, the description of the `sh' utility. */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1907 | if (argv[optind]==NULL && input==stdin && |
| 1908 | isatty(fileno(stdin)) && isatty(fileno(stdout))) { |
| 1909 | interactive=TRUE; |
| 1910 | } |
| 1911 | if (interactive==TRUE) { |
Eric Andersen | 6f65a3a | 2001-01-20 01:10:07 +0000 | [diff] [blame] | 1912 | //printf( "optind=%d argv[optind]='%s'\n", optind, argv[optind]); |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 1913 | /* Looks like they want an interactive shell */ |
Eric Andersen | 6f65a3a | 2001-01-20 01:10:07 +0000 | [diff] [blame] | 1914 | printf( "\n\nBusyBox v%s (%s) Built-in shell (lash)\n", BB_VER, BB_BT); |
| 1915 | printf( "Enter 'help' for a list of built-in commands.\n\n"); |
Eric Andersen | 6a4c33c | 2000-07-28 17:08:36 +0000 | [diff] [blame] | 1916 | } else if (local_pending_command==NULL) { |
Eric Andersen | 6f65a3a | 2001-01-20 01:10:07 +0000 | [diff] [blame] | 1917 | //printf( "optind=%d argv[optind]='%s'\n", optind, argv[optind]); |
Matt Kraai | bbaef66 | 2000-09-27 02:43:35 +0000 | [diff] [blame] | 1918 | input = xfopen(argv[optind], "r"); |
Eric Andersen | 8ea28be | 2001-01-05 20:58:22 +0000 | [diff] [blame] | 1919 | mark_open(fileno(input)); /* be lazy, never mark this closed */ |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 1920 | } |
| 1921 | |
Eric Andersen | 6efc48c | 2000-07-18 08:16:39 +0000 | [diff] [blame] | 1922 | /* initialize the cwd -- this is never freed...*/ |
| 1923 | cwd=(char*)xmalloc(sizeof(char)*MAX_LINE+1); |
| 1924 | getcwd(cwd, sizeof(char)*MAX_LINE); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1925 | |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 1926 | #ifdef BB_FEATURE_CLEAN_UP |
| 1927 | atexit(free_memory); |
| 1928 | #endif |
| 1929 | |
Eric Andersen | b3d6e2d | 2001-03-13 22:57:56 +0000 | [diff] [blame] | 1930 | #ifdef BB_FEATURE_COMMAND_EDITING |
| 1931 | cmdedit_set_initial_prompt(); |
| 1932 | #else |
| 1933 | PS1 = NULL; |
| 1934 | PS2 = "> "; |
| 1935 | #endif |
| 1936 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1937 | return (busy_loop(input)); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1938 | } |
Eric Andersen | b3d6e2d | 2001-03-13 22:57:56 +0000 | [diff] [blame] | 1939 | |