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 | * |
| 5 | * Copyright (C) 2000 by Lineo, inc. |
| 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 | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 28 | |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 29 | //#define BB_FEATURE_SH_BACKTICKS |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 30 | //#define BB_FEATURE_SH_IF_EXPRESSIONS |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 31 | //#define BB_FEATURE_SH_ENVIRONMENT |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 32 | //#define DEBUG_SHELL |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 33 | |
| 34 | |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 35 | #include "internal.h" |
| 36 | #include <stdio.h> |
| 37 | #include <stdlib.h> |
| 38 | #include <ctype.h> |
| 39 | #include <errno.h> |
| 40 | #include <fcntl.h> |
| 41 | #include <glob.h> |
| 42 | #include <signal.h> |
| 43 | #include <string.h> |
| 44 | #include <sys/ioctl.h> |
| 45 | #include <sys/wait.h> |
| 46 | #include <unistd.h> |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 47 | #include <getopt.h> |
Erik Andersen | f0657d3 | 2000-04-12 17:49:52 +0000 | [diff] [blame] | 48 | #ifdef BB_FEATURE_SH_COMMAND_EDITING |
| 49 | #include "cmdedit.h" |
| 50 | #endif |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 51 | |
Eric Andersen | 6efc48c | 2000-07-18 08:16:39 +0000 | [diff] [blame] | 52 | #define MAX_LINE 256 /* size of input buffer for `read' builtin */ |
Eric Andersen | b54833c | 2000-07-03 23:56:26 +0000 | [diff] [blame] | 53 | #define MAX_READ 128 /* size of input buffer for `read' builtin */ |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 54 | #define JOB_STATUS_FORMAT "[%d] %-22s %.40s\n" |
| 55 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 56 | |
| 57 | enum redirectionType { REDIRECT_INPUT, REDIRECT_OVERWRITE, |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 58 | REDIRECT_APPEND |
| 59 | }; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 60 | |
Eric Andersen | e92108a | 2000-07-26 00:53:56 +0000 | [diff] [blame] | 61 | static const unsigned int REGULAR_JOB_CONTEXT=0x1; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 62 | static const unsigned int IF_TRUE_CONTEXT=0x2; |
| 63 | static const unsigned int IF_FALSE_CONTEXT=0x4; |
| 64 | static const unsigned int THEN_EXP_CONTEXT=0x8; |
| 65 | static const unsigned int ELSE_EXP_CONTEXT=0x10; |
Eric Andersen | e92108a | 2000-07-26 00:53:56 +0000 | [diff] [blame] | 66 | |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 67 | |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 68 | struct jobSet { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 69 | struct job *head; /* head of list of running jobs */ |
| 70 | struct job *fg; /* current foreground job */ |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 71 | }; |
| 72 | |
| 73 | struct redirectionSpecifier { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 74 | enum redirectionType type; /* type of redirection */ |
| 75 | int fd; /* file descriptor being redirected */ |
| 76 | char *filename; /* file to redirect fd to */ |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 77 | }; |
| 78 | |
| 79 | struct childProgram { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 80 | pid_t pid; /* 0 if exited */ |
| 81 | char **argv; /* program name and arguments */ |
| 82 | int numRedirections; /* elements in redirection array */ |
| 83 | struct redirectionSpecifier *redirections; /* I/O redirections */ |
| 84 | glob_t globResult; /* result of parameter globbing */ |
| 85 | int freeGlob; /* should we globfree(&globResult)? */ |
| 86 | int isStopped; /* is the program currently running? */ |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 87 | }; |
| 88 | |
| 89 | struct job { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 90 | int jobId; /* job number */ |
| 91 | int numProgs; /* total number of programs in job */ |
| 92 | int runningProgs; /* number of programs running */ |
| 93 | char *text; /* name of job */ |
| 94 | char *cmdBuf; /* buffer various argv's point into */ |
| 95 | pid_t pgrp; /* process group ID for the job */ |
| 96 | struct childProgram *progs; /* array of programs in job */ |
| 97 | struct job *next; /* to track background commands */ |
| 98 | int stoppedProgs; /* number of programs alive, but stopped */ |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 99 | int jobContext; /* bitmask defining current context */ |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 100 | }; |
| 101 | |
| 102 | struct builtInCommand { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 103 | char *cmd; /* name */ |
| 104 | char *descr; /* description */ |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 105 | int (*function) (struct job *, struct jobSet * jobList); /* function ptr */ |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 106 | }; |
| 107 | |
Eric Andersen | 34e1941 | 2000-07-10 18:47:24 +0000 | [diff] [blame] | 108 | /* function prototypes for builtins */ |
| 109 | static int builtin_cd(struct job *cmd, struct jobSet *junk); |
| 110 | static int builtin_env(struct job *dummy, struct jobSet *junk); |
| 111 | static int builtin_exit(struct job *cmd, struct jobSet *junk); |
| 112 | static int builtin_fg_bg(struct job *cmd, struct jobSet *jobList); |
| 113 | static int builtin_help(struct job *cmd, struct jobSet *junk); |
| 114 | static int builtin_jobs(struct job *dummy, struct jobSet *jobList); |
| 115 | static int builtin_pwd(struct job *dummy, struct jobSet *junk); |
| 116 | static int builtin_export(struct job *cmd, struct jobSet *junk); |
| 117 | static int builtin_source(struct job *cmd, struct jobSet *jobList); |
| 118 | static int builtin_unset(struct job *cmd, struct jobSet *junk); |
| 119 | static int builtin_read(struct job *cmd, struct jobSet *junk); |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 120 | #ifdef BB_FEATURE_SH_IF_EXPRESSIONS |
| 121 | static int builtin_if(struct job *cmd, struct jobSet *junk); |
| 122 | static int builtin_then(struct job *cmd, struct jobSet *junk); |
| 123 | static int builtin_else(struct job *cmd, struct jobSet *junk); |
| 124 | static int builtin_fi(struct job *cmd, struct jobSet *junk); |
| 125 | #endif |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 126 | |
Eric Andersen | 34e1941 | 2000-07-10 18:47:24 +0000 | [diff] [blame] | 127 | |
| 128 | /* function prototypes for shell stuff */ |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 129 | static void checkJobs(struct jobSet *jobList); |
| 130 | static int getCommand(FILE * source, char *command); |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 131 | static int parseCommand(char **commandPtr, struct job *job, struct jobSet *jobList, int *inBg); |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 132 | static int runCommand(struct job *newJob, struct jobSet *jobList, int inBg, int outPipe[2]); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 133 | static int busy_loop(FILE * input); |
| 134 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 135 | |
Mark Whitley | 37653aa | 2000-07-12 23:36:17 +0000 | [diff] [blame] | 136 | /* Table of built-in functions (these are non-forking builtins, meaning they |
| 137 | * can change global variables in the parent shell process but they will not |
| 138 | * work with pipes and redirects; 'unset foo | whatever' will not work) */ |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 139 | static struct builtInCommand bltins[] = { |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 140 | {"bg", "Resume a job in the background", builtin_fg_bg}, |
| 141 | {"cd", "Change working directory", builtin_cd}, |
| 142 | {"exit", "Exit from shell()", builtin_exit}, |
| 143 | {"fg", "Bring job into the foreground", builtin_fg_bg}, |
| 144 | {"jobs", "Lists the active jobs", builtin_jobs}, |
| 145 | {"export", "Set environment variable", builtin_export}, |
| 146 | {"unset", "Unset environment variable", builtin_unset}, |
| 147 | {"read", "Input environment variable", builtin_read}, |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 148 | #ifdef BB_FEATURE_SH_IF_EXPRESSIONS |
| 149 | {"if", NULL, builtin_if}, |
| 150 | {"then", NULL, builtin_then}, |
| 151 | {"else", NULL, builtin_else}, |
| 152 | {"fi", NULL, builtin_fi}, |
| 153 | #endif |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 154 | {NULL, NULL, NULL} |
Erik Andersen | 330fd2b | 2000-05-19 05:35:19 +0000 | [diff] [blame] | 155 | }; |
| 156 | |
Mark Whitley | 37653aa | 2000-07-12 23:36:17 +0000 | [diff] [blame] | 157 | /* Table of forking built-in functions (things that fork cannot change global |
| 158 | * variables in the parent process, such as the current working directory) */ |
Erik Andersen | 330fd2b | 2000-05-19 05:35:19 +0000 | [diff] [blame] | 159 | static struct builtInCommand bltins_forking[] = { |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 160 | {"env", "Print all environment variables", builtin_env}, |
| 161 | {"pwd", "Print current directory", builtin_pwd}, |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 162 | {".", "Source-in and run commands in a file", builtin_source}, |
| 163 | {"help", "List shell built-in commands", builtin_help}, |
| 164 | {NULL, NULL, NULL} |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 165 | }; |
| 166 | |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 167 | static char *prompt = "# "; |
Eric Andersen | 6efc48c | 2000-07-18 08:16:39 +0000 | [diff] [blame] | 168 | static char *cwd; |
Eric Andersen | 1c314ad | 2000-06-28 16:56:25 +0000 | [diff] [blame] | 169 | static char *local_pending_command = NULL; |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 170 | static char *promptStr = NULL; |
| 171 | static struct jobSet jobList = { NULL, NULL }; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 172 | static int argc; |
| 173 | static char **argv; |
| 174 | #ifdef BB_FEATURE_SH_ENVIRONMENT |
| 175 | static int lastBgPid=-1; |
| 176 | static int lastReturnCode=-1; |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 177 | static int showXtrace=FALSE; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 178 | #endif |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 179 | |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 180 | |
Erik Andersen | f0657d3 | 2000-04-12 17:49:52 +0000 | [diff] [blame] | 181 | #ifdef BB_FEATURE_SH_COMMAND_EDITING |
Eric Andersen | fad04fd | 2000-07-14 06:49:52 +0000 | [diff] [blame] | 182 | void win_changed(int junk) |
Erik Andersen | f0657d3 | 2000-04-12 17:49:52 +0000 | [diff] [blame] | 183 | { |
Eric Andersen | fad04fd | 2000-07-14 06:49:52 +0000 | [diff] [blame] | 184 | struct winsize win = { 0, 0, 0, 0 }; |
Erik Andersen | f0657d3 | 2000-04-12 17:49:52 +0000 | [diff] [blame] | 185 | ioctl(0, TIOCGWINSZ, &win); |
| 186 | if (win.ws_col > 0) { |
| 187 | cmdedit_setwidth( win.ws_col - 1); |
| 188 | } |
| 189 | } |
| 190 | #endif |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 191 | |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 192 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 193 | /* built-in 'cd <path>' handler */ |
Eric Andersen | 34e1941 | 2000-07-10 18:47:24 +0000 | [diff] [blame] | 194 | static int builtin_cd(struct job *cmd, struct jobSet *junk) |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 195 | { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 196 | char *newdir; |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 197 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 198 | if (!cmd->progs[0].argv[1] == 1) |
| 199 | newdir = getenv("HOME"); |
| 200 | else |
| 201 | newdir = cmd->progs[0].argv[1]; |
| 202 | if (chdir(newdir)) { |
| 203 | printf("cd: %s: %s\n", newdir, strerror(errno)); |
| 204 | return FALSE; |
| 205 | } |
Eric Andersen | 6efc48c | 2000-07-18 08:16:39 +0000 | [diff] [blame] | 206 | getcwd(cwd, sizeof(char)*MAX_LINE); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 207 | |
| 208 | return TRUE; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 209 | } |
| 210 | |
| 211 | /* built-in 'env' handler */ |
Eric Andersen | 34e1941 | 2000-07-10 18:47:24 +0000 | [diff] [blame] | 212 | static int builtin_env(struct job *dummy, struct jobSet *junk) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 213 | { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 214 | char **e; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 215 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 216 | for (e = environ; *e; e++) { |
| 217 | fprintf(stdout, "%s\n", *e); |
| 218 | } |
| 219 | return (0); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 220 | } |
| 221 | |
| 222 | /* built-in 'exit' handler */ |
Eric Andersen | 34e1941 | 2000-07-10 18:47:24 +0000 | [diff] [blame] | 223 | static int builtin_exit(struct job *cmd, struct jobSet *junk) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 224 | { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 225 | if (!cmd->progs[0].argv[1] == 1) |
| 226 | exit TRUE; |
| 227 | |
Eric Andersen | b610615 | 2000-06-19 17:25:40 +0000 | [diff] [blame] | 228 | return(atoi(cmd->progs[0].argv[1])); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 229 | } |
| 230 | |
| 231 | /* built-in 'fg' and 'bg' handler */ |
Eric Andersen | 34e1941 | 2000-07-10 18:47:24 +0000 | [diff] [blame] | 232 | static int builtin_fg_bg(struct job *cmd, struct jobSet *jobList) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 233 | { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 234 | int i, jobNum; |
Erik Andersen | 6273f65 | 2000-03-17 01:12:41 +0000 | [diff] [blame] | 235 | struct job *job=NULL; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 236 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 237 | if (!jobList->head) { |
| 238 | if (!cmd->progs[0].argv[1] || cmd->progs[0].argv[2]) { |
Matt Kraai | d537a95 | 2000-07-14 01:51:25 +0000 | [diff] [blame] | 239 | errorMsg("%s: exactly one argument is expected\n", |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 240 | cmd->progs[0].argv[0]); |
| 241 | return FALSE; |
| 242 | } |
| 243 | if (sscanf(cmd->progs[0].argv[1], "%%%d", &jobNum) != 1) { |
Matt Kraai | d537a95 | 2000-07-14 01:51:25 +0000 | [diff] [blame] | 244 | errorMsg("%s: bad argument '%s'\n", |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 245 | cmd->progs[0].argv[0], cmd->progs[0].argv[1]); |
| 246 | return FALSE; |
| 247 | for (job = jobList->head; job; job = job->next) { |
| 248 | if (job->jobId == jobNum) { |
| 249 | break; |
| 250 | } |
| 251 | } |
| 252 | } |
| 253 | } else { |
| 254 | job = jobList->head; |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 255 | } |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 256 | |
| 257 | if (!job) { |
Matt Kraai | d537a95 | 2000-07-14 01:51:25 +0000 | [diff] [blame] | 258 | errorMsg("%s: unknown job %d\n", |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 259 | cmd->progs[0].argv[0], jobNum); |
| 260 | return FALSE; |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 261 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 262 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 263 | if (*cmd->progs[0].argv[0] == 'f') { |
| 264 | /* Make this job the foreground job */ |
Eric Andersen | 1c314ad | 2000-06-28 16:56:25 +0000 | [diff] [blame] | 265 | /* suppress messages when run from /linuxrc mag@sysgo.de */ |
| 266 | if (tcsetpgrp(0, job->pgrp) && errno != ENOTTY) |
| 267 | perror("tcsetpgrp"); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 268 | jobList->fg = job; |
| 269 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 270 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 271 | /* Restart the processes in the job */ |
| 272 | for (i = 0; i < job->numProgs; i++) |
| 273 | job->progs[i].isStopped = 0; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 274 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 275 | kill(-job->pgrp, SIGCONT); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 276 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 277 | job->stoppedProgs = 0; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 278 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 279 | return TRUE; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 280 | } |
| 281 | |
| 282 | /* built-in 'help' handler */ |
Eric Andersen | fad04fd | 2000-07-14 06:49:52 +0000 | [diff] [blame] | 283 | static int builtin_help(struct job *dummy, struct jobSet *junk) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 284 | { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 285 | struct builtInCommand *x; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 286 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 287 | fprintf(stdout, "\nBuilt-in commands:\n"); |
| 288 | fprintf(stdout, "-------------------\n"); |
| 289 | for (x = bltins; x->cmd; x++) { |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 290 | if (x->descr==NULL) |
| 291 | continue; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 292 | fprintf(stdout, "%s\t%s\n", x->cmd, x->descr); |
| 293 | } |
Erik Andersen | 330fd2b | 2000-05-19 05:35:19 +0000 | [diff] [blame] | 294 | for (x = bltins_forking; x->cmd; x++) { |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 295 | if (x->descr==NULL) |
| 296 | continue; |
Erik Andersen | 330fd2b | 2000-05-19 05:35:19 +0000 | [diff] [blame] | 297 | fprintf(stdout, "%s\t%s\n", x->cmd, x->descr); |
| 298 | } |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 299 | fprintf(stdout, "\n\n"); |
| 300 | return TRUE; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 301 | } |
| 302 | |
| 303 | /* built-in 'jobs' handler */ |
Eric Andersen | 34e1941 | 2000-07-10 18:47:24 +0000 | [diff] [blame] | 304 | static int builtin_jobs(struct job *dummy, struct jobSet *jobList) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 305 | { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 306 | struct job *job; |
| 307 | char *statusString; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 308 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 309 | for (job = jobList->head; job; job = job->next) { |
| 310 | if (job->runningProgs == job->stoppedProgs) |
| 311 | statusString = "Stopped"; |
| 312 | else |
| 313 | statusString = "Running"; |
| 314 | |
| 315 | printf(JOB_STATUS_FORMAT, job->jobId, statusString, job->text); |
| 316 | } |
| 317 | return TRUE; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 318 | } |
| 319 | |
| 320 | |
| 321 | /* built-in 'pwd' handler */ |
Eric Andersen | 34e1941 | 2000-07-10 18:47:24 +0000 | [diff] [blame] | 322 | static int builtin_pwd(struct job *dummy, struct jobSet *junk) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 323 | { |
Eric Andersen | 6efc48c | 2000-07-18 08:16:39 +0000 | [diff] [blame] | 324 | getcwd(cwd, sizeof(char)*MAX_LINE); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 325 | fprintf(stdout, "%s\n", cwd); |
| 326 | return TRUE; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 327 | } |
| 328 | |
Erik Andersen | 6273f65 | 2000-03-17 01:12:41 +0000 | [diff] [blame] | 329 | /* built-in 'export VAR=value' handler */ |
Eric Andersen | 34e1941 | 2000-07-10 18:47:24 +0000 | [diff] [blame] | 330 | static int builtin_export(struct job *cmd, struct jobSet *junk) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 331 | { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 332 | int res; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 333 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 334 | if (!cmd->progs[0].argv[1] == 1) { |
Eric Andersen | 34e1941 | 2000-07-10 18:47:24 +0000 | [diff] [blame] | 335 | return (builtin_env(cmd, junk)); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 336 | } |
| 337 | res = putenv(cmd->progs[0].argv[1]); |
| 338 | if (res) |
Erik Andersen | 6273f65 | 2000-03-17 01:12:41 +0000 | [diff] [blame] | 339 | fprintf(stdout, "export: %s\n", strerror(errno)); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 340 | return (res); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 341 | } |
| 342 | |
Eric Andersen | b54833c | 2000-07-03 23:56:26 +0000 | [diff] [blame] | 343 | /* built-in 'read VAR' handler */ |
Eric Andersen | 34e1941 | 2000-07-10 18:47:24 +0000 | [diff] [blame] | 344 | static int builtin_read(struct job *cmd, struct jobSet *junk) |
Eric Andersen | b54833c | 2000-07-03 23:56:26 +0000 | [diff] [blame] | 345 | { |
| 346 | int res = 0, len, newlen; |
| 347 | char *s; |
| 348 | char string[MAX_READ]; |
| 349 | |
| 350 | if (cmd->progs[0].argv[1]) { |
| 351 | /* argument (VAR) given: put "VAR=" into buffer */ |
| 352 | strcpy(string, cmd->progs[0].argv[1]); |
| 353 | len = strlen(string); |
| 354 | string[len++] = '='; |
| 355 | string[len] = '\0'; |
| 356 | fgets(&string[len], sizeof(string) - len, stdin); /* read string */ |
| 357 | newlen = strlen(string); |
| 358 | if(newlen > len) |
| 359 | string[--newlen] = '\0'; /* chomp trailing newline */ |
| 360 | /* |
| 361 | ** string should now contain "VAR=<value>" |
| 362 | ** copy it (putenv() won't do that, so we must make sure |
| 363 | ** the string resides in a static buffer!) |
| 364 | */ |
| 365 | res = -1; |
| 366 | if((s = strdup(string))) |
| 367 | res = putenv(s); |
| 368 | if (res) |
| 369 | fprintf(stdout, "read: %s\n", strerror(errno)); |
| 370 | } |
| 371 | else |
| 372 | fgets(string, sizeof(string), stdin); |
| 373 | |
| 374 | return (res); |
| 375 | } |
| 376 | |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 377 | #ifdef BB_FEATURE_SH_IF_EXPRESSIONS |
| 378 | /* Built-in handler for 'if' commands */ |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 379 | static int builtin_if(struct job *cmd, struct jobSet *jobList) |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 380 | { |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 381 | int status; |
| 382 | char* charptr1=cmd->text+3; /* skip over the leading 'if ' */ |
| 383 | |
| 384 | /* Now run the 'if' command */ |
| 385 | status=strlen(charptr1); |
| 386 | local_pending_command = xmalloc(status+1); |
| 387 | strncpy(local_pending_command, charptr1, status); |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 388 | local_pending_command[status]='\0'; |
| 389 | #ifdef DEBUG_SHELL |
| 390 | fprintf(stderr, "'if' now testing '%s'\n", local_pending_command); |
| 391 | #endif |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 392 | status = busy_loop(NULL); /* Frees local_pending_command */ |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 393 | #ifdef DEBUG_SHELL |
| 394 | fprintf(stderr, "if test returned "); |
| 395 | #endif |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 396 | if (status == 0) { |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 397 | #ifdef DEBUG_SHELL |
| 398 | fprintf(stderr, "TRUE\n"); |
| 399 | #endif |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 400 | cmd->jobContext |= IF_TRUE_CONTEXT; |
| 401 | } else { |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 402 | #ifdef DEBUG_SHELL |
| 403 | fprintf(stderr, "FALSE\n"); |
| 404 | #endif |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 405 | cmd->jobContext |= IF_FALSE_CONTEXT; |
| 406 | } |
| 407 | |
| 408 | return status; |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 409 | } |
| 410 | |
| 411 | /* Built-in handler for 'then' (part of the 'if' command) */ |
| 412 | static int builtin_then(struct job *cmd, struct jobSet *junk) |
| 413 | { |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 414 | int status; |
| 415 | char* charptr1=cmd->text+5; /* skip over the leading 'then ' */ |
| 416 | |
| 417 | if (! (cmd->jobContext & (IF_TRUE_CONTEXT|IF_FALSE_CONTEXT))) { |
| 418 | errorMsg("unexpected token `then'\n"); |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 419 | return FALSE; |
| 420 | } |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 421 | /* If the if result was FALSE, skip the 'then' stuff */ |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 422 | if (cmd->jobContext & IF_FALSE_CONTEXT) { |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 423 | return TRUE; |
| 424 | } |
| 425 | |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 426 | cmd->jobContext |= THEN_EXP_CONTEXT; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 427 | //printf("Hit an then -- jobContext=%d\n", cmd->jobContext); |
| 428 | |
| 429 | /* Now run the 'then' command */ |
| 430 | status=strlen(charptr1); |
| 431 | local_pending_command = xmalloc(status+1); |
| 432 | strncpy(local_pending_command, charptr1, status); |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 433 | local_pending_command[status]='\0'; |
| 434 | #ifdef DEBUG_SHELL |
| 435 | fprintf(stderr, "'then' now running '%s'\n", charptr1); |
| 436 | #endif |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 437 | return( busy_loop(NULL)); |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 438 | } |
| 439 | |
| 440 | /* Built-in handler for 'else' (part of the 'if' command) */ |
| 441 | static int builtin_else(struct job *cmd, struct jobSet *junk) |
| 442 | { |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 443 | int status; |
| 444 | char* charptr1=cmd->text+5; /* skip over the leading 'else ' */ |
| 445 | |
| 446 | if (! (cmd->jobContext & (IF_TRUE_CONTEXT|IF_FALSE_CONTEXT))) { |
| 447 | errorMsg("unexpected token `else'\n"); |
| 448 | return FALSE; |
| 449 | } |
| 450 | /* If the if result was TRUE, skip the 'else' stuff */ |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 451 | if (cmd->jobContext & IF_TRUE_CONTEXT) { |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 452 | return TRUE; |
| 453 | } |
| 454 | |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 455 | cmd->jobContext |= ELSE_EXP_CONTEXT; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 456 | //printf("Hit an else -- jobContext=%d\n", cmd->jobContext); |
| 457 | |
| 458 | /* Now run the 'else' command */ |
| 459 | status=strlen(charptr1); |
| 460 | local_pending_command = xmalloc(status+1); |
| 461 | strncpy(local_pending_command, charptr1, status); |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 462 | local_pending_command[status]='\0'; |
| 463 | #ifdef DEBUG_SHELL |
| 464 | fprintf(stderr, "'else' now running '%s'\n", charptr1); |
| 465 | #endif |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 466 | return( busy_loop(NULL)); |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 467 | } |
| 468 | |
| 469 | /* Built-in handler for 'fi' (part of the 'if' command) */ |
| 470 | static int builtin_fi(struct job *cmd, struct jobSet *junk) |
| 471 | { |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 472 | if (! (cmd->jobContext & (IF_TRUE_CONTEXT|IF_FALSE_CONTEXT))) { |
| 473 | errorMsg("unexpected token `fi'\n"); |
| 474 | return FALSE; |
| 475 | } |
| 476 | /* Clear out the if and then context bits */ |
| 477 | cmd->jobContext &= ~(IF_TRUE_CONTEXT|IF_FALSE_CONTEXT|THEN_EXP_CONTEXT|ELSE_EXP_CONTEXT); |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 478 | #ifdef DEBUG_SHELL |
| 479 | fprintf(stderr, "Hit an fi -- jobContext=%d\n", cmd->jobContext); |
| 480 | #endif |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 481 | return TRUE; |
| 482 | } |
| 483 | #endif |
| 484 | |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 485 | /* Built-in '.' handler (read-in and execute commands from file) */ |
Eric Andersen | 34e1941 | 2000-07-10 18:47:24 +0000 | [diff] [blame] | 486 | static int builtin_source(struct job *cmd, struct jobSet *junk) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 487 | { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 488 | FILE *input; |
| 489 | int status; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 490 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 491 | if (!cmd->progs[0].argv[1] == 1) |
| 492 | return FALSE; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 493 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 494 | input = fopen(cmd->progs[0].argv[1], "r"); |
| 495 | if (!input) { |
| 496 | fprintf(stdout, "Couldn't open file '%s'\n", |
| 497 | cmd->progs[0].argv[1]); |
| 498 | return FALSE; |
| 499 | } |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 500 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 501 | /* Now run the file */ |
| 502 | status = busy_loop(input); |
| 503 | return (status); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 504 | } |
| 505 | |
| 506 | /* built-in 'unset VAR' handler */ |
Eric Andersen | 34e1941 | 2000-07-10 18:47:24 +0000 | [diff] [blame] | 507 | static int builtin_unset(struct job *cmd, struct jobSet *junk) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 508 | { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 509 | if (!cmd->progs[0].argv[1] == 1) { |
| 510 | fprintf(stdout, "unset: parameter required.\n"); |
| 511 | return FALSE; |
| 512 | } |
| 513 | unsetenv(cmd->progs[0].argv[1]); |
| 514 | return TRUE; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 515 | } |
| 516 | |
| 517 | /* free up all memory from a job */ |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 518 | static void freeJob(struct job *cmd) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 519 | { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 520 | int i; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 521 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 522 | for (i = 0; i < cmd->numProgs; i++) { |
| 523 | free(cmd->progs[i].argv); |
| 524 | if (cmd->progs[i].redirections) |
| 525 | free(cmd->progs[i].redirections); |
| 526 | if (cmd->progs[i].freeGlob) |
| 527 | globfree(&cmd->progs[i].globResult); |
| 528 | } |
| 529 | free(cmd->progs); |
| 530 | if (cmd->text) |
| 531 | free(cmd->text); |
| 532 | free(cmd->cmdBuf); |
Eric Andersen | ec10b9d | 2000-07-14 01:13:11 +0000 | [diff] [blame] | 533 | memset(cmd, 0, sizeof(struct job)); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 534 | } |
| 535 | |
| 536 | /* remove a job from the jobList */ |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 537 | static void removeJob(struct jobSet *jobList, struct job *job) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 538 | { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 539 | struct job *prevJob; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 540 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 541 | freeJob(job); |
| 542 | if (job == jobList->head) { |
| 543 | jobList->head = job->next; |
| 544 | } else { |
| 545 | prevJob = jobList->head; |
| 546 | while (prevJob->next != job) |
| 547 | prevJob = prevJob->next; |
| 548 | prevJob->next = job->next; |
| 549 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 550 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 551 | free(job); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 552 | } |
| 553 | |
| 554 | /* Checks to see if any background processes have exited -- if they |
| 555 | have, figure out why and see if a job has completed */ |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 556 | static void checkJobs(struct jobSet *jobList) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 557 | { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 558 | struct job *job; |
| 559 | pid_t childpid; |
| 560 | int status; |
| 561 | int progNum = 0; |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 562 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 563 | while ((childpid = waitpid(-1, &status, WNOHANG | WUNTRACED)) > 0) { |
| 564 | for (job = jobList->head; job; job = job->next) { |
| 565 | progNum = 0; |
| 566 | while (progNum < job->numProgs && |
| 567 | job->progs[progNum].pid != childpid) progNum++; |
| 568 | if (progNum < job->numProgs) |
| 569 | break; |
| 570 | } |
| 571 | |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 572 | /* This happens on backticked commands */ |
| 573 | if(job==NULL) |
| 574 | return; |
| 575 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 576 | if (WIFEXITED(status) || WIFSIGNALED(status)) { |
| 577 | /* child exited */ |
| 578 | job->runningProgs--; |
| 579 | job->progs[progNum].pid = 0; |
| 580 | |
| 581 | if (!job->runningProgs) { |
| 582 | printf(JOB_STATUS_FORMAT, job->jobId, "Done", job->text); |
| 583 | removeJob(jobList, job); |
| 584 | } |
| 585 | } else { |
| 586 | /* child stopped */ |
| 587 | job->stoppedProgs++; |
| 588 | job->progs[progNum].isStopped = 1; |
| 589 | |
| 590 | if (job->stoppedProgs == job->numProgs) { |
| 591 | printf(JOB_STATUS_FORMAT, job->jobId, "Stopped", |
| 592 | job->text); |
| 593 | } |
| 594 | } |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 595 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 596 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 597 | if (childpid == -1 && errno != ECHILD) |
| 598 | perror("waitpid"); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 599 | } |
| 600 | |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 601 | static int setupRedirections(struct childProgram *prog) |
| 602 | { |
| 603 | int i; |
| 604 | int openfd; |
| 605 | int mode = O_RDONLY; |
| 606 | struct redirectionSpecifier *redir = prog->redirections; |
| 607 | |
| 608 | for (i = 0; i < prog->numRedirections; i++, redir++) { |
| 609 | switch (redir->type) { |
| 610 | case REDIRECT_INPUT: |
| 611 | mode = O_RDONLY; |
| 612 | break; |
| 613 | case REDIRECT_OVERWRITE: |
| 614 | mode = O_RDWR | O_CREAT | O_TRUNC; |
| 615 | break; |
| 616 | case REDIRECT_APPEND: |
| 617 | mode = O_RDWR | O_CREAT | O_APPEND; |
| 618 | break; |
| 619 | } |
| 620 | |
| 621 | openfd = open(redir->filename, mode, 0666); |
| 622 | if (openfd < 0) { |
| 623 | /* this could get lost if stderr has been redirected, but |
| 624 | bash and ash both lose it as well (though zsh doesn't!) */ |
| 625 | errorMsg("error opening %s: %s\n", redir->filename, |
| 626 | strerror(errno)); |
| 627 | return 1; |
| 628 | } |
| 629 | |
| 630 | if (openfd != redir->fd) { |
| 631 | dup2(openfd, redir->fd); |
| 632 | close(openfd); |
| 633 | } |
| 634 | } |
| 635 | |
| 636 | return 0; |
| 637 | } |
| 638 | |
| 639 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 640 | static int getCommand(FILE * source, char *command) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 641 | { |
Eric Andersen | 1c314ad | 2000-06-28 16:56:25 +0000 | [diff] [blame] | 642 | if (source == NULL) { |
| 643 | if (local_pending_command) { |
| 644 | /* a command specified (-c option): return it & mark it done */ |
| 645 | strcpy(command, local_pending_command); |
| 646 | free(local_pending_command); |
| 647 | local_pending_command = NULL; |
| 648 | return 0; |
| 649 | } |
| 650 | return 1; |
| 651 | } |
| 652 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 653 | if (source == stdin) { |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 654 | #ifdef BB_FEATURE_SH_COMMAND_EDITING |
Erik Andersen | c7c634b | 2000-03-19 05:28:55 +0000 | [diff] [blame] | 655 | int len; |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 656 | |
| 657 | /* |
| 658 | ** enable command line editing only while a command line |
| 659 | ** is actually being read; otherwise, we'll end up bequeathing |
| 660 | ** atexit() handlers and other unwanted stuff to our |
| 661 | ** child processes (rob@sysgo.de) |
| 662 | */ |
| 663 | cmdedit_init(); |
| 664 | signal(SIGWINCH, win_changed); |
Erik Andersen | d4bc1fc | 2000-04-05 05:19:03 +0000 | [diff] [blame] | 665 | len=fprintf(stdout, "%s %s", cwd, prompt); |
Erik Andersen | c7c634b | 2000-03-19 05:28:55 +0000 | [diff] [blame] | 666 | fflush(stdout); |
Eric Andersen | ec10b9d | 2000-07-14 01:13:11 +0000 | [diff] [blame] | 667 | promptStr=(char*)xmalloc(sizeof(char)*(len+1)); |
Erik Andersen | d4bc1fc | 2000-04-05 05:19:03 +0000 | [diff] [blame] | 668 | sprintf(promptStr, "%s %s", cwd, prompt); |
Erik Andersen | f0657d3 | 2000-04-12 17:49:52 +0000 | [diff] [blame] | 669 | cmdedit_read_input(promptStr, command); |
Erik Andersen | c7c634b | 2000-03-19 05:28:55 +0000 | [diff] [blame] | 670 | free( promptStr); |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 671 | cmdedit_terminate(); |
| 672 | signal(SIGWINCH, SIG_DFL); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 673 | return 0; |
Erik Andersen | c7c634b | 2000-03-19 05:28:55 +0000 | [diff] [blame] | 674 | #else |
| 675 | fprintf(stdout, "%s %s", cwd, prompt); |
| 676 | fflush(stdout); |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 677 | #endif |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 678 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 679 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 680 | if (!fgets(command, BUFSIZ - 2, source)) { |
| 681 | if (source == stdin) |
| 682 | printf("\n"); |
| 683 | return 1; |
| 684 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 685 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 686 | /* remove trailing newline */ |
| 687 | command[strlen(command) - 1] = '\0'; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 688 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 689 | return 0; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 690 | } |
| 691 | |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 692 | #ifdef BB_FEATURE_SH_ENVIRONMENT |
| 693 | #define __MAX_INT_CHARS 7 |
| 694 | static char* itoa(register int i) |
| 695 | { |
| 696 | static char a[__MAX_INT_CHARS]; |
| 697 | register char *b = a + sizeof(a) - 1; |
| 698 | int sign = (i < 0); |
| 699 | |
| 700 | if (sign) |
| 701 | i = -i; |
| 702 | *b = 0; |
| 703 | do |
| 704 | { |
| 705 | *--b = '0' + (i % 10); |
| 706 | i /= 10; |
| 707 | } |
| 708 | while (i); |
| 709 | if (sign) |
| 710 | *--b = '-'; |
| 711 | return b; |
| 712 | } |
| 713 | #endif |
| 714 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 715 | static void globLastArgument(struct childProgram *prog, int *argcPtr, |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 716 | int *argcAllocedPtr) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 717 | { |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 718 | int argc_l = *argcPtr; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 719 | int argcAlloced = *argcAllocedPtr; |
| 720 | int rc; |
| 721 | int flags; |
| 722 | int i; |
Eric Andersen | b54833c | 2000-07-03 23:56:26 +0000 | [diff] [blame] | 723 | char *src, *dst, *var; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 724 | |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 725 | if (argc_l > 1) { /* cmd->globResult is already initialized */ |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 726 | flags = GLOB_APPEND; |
| 727 | i = prog->globResult.gl_pathc; |
| 728 | } else { |
| 729 | prog->freeGlob = 1; |
| 730 | flags = 0; |
| 731 | i = 0; |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 732 | } |
Eric Andersen | b54833c | 2000-07-03 23:56:26 +0000 | [diff] [blame] | 733 | /* do shell variable substitution */ |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 734 | if(*prog->argv[argc_l - 1] == '$') { |
| 735 | if ((var = getenv(prog->argv[argc_l - 1] + 1))) { |
| 736 | prog->argv[argc_l - 1] = var; |
| 737 | } |
| 738 | #ifdef BB_FEATURE_SH_ENVIRONMENT |
| 739 | else { |
| 740 | switch(*(prog->argv[argc_l - 1] + 1)) { |
| 741 | case '?': |
| 742 | prog->argv[argc_l - 1] = itoa(lastReturnCode); |
| 743 | break; |
| 744 | case '$': |
| 745 | prog->argv[argc_l - 1] = itoa(getpid()); |
| 746 | break; |
| 747 | case '#': |
| 748 | prog->argv[argc_l - 1] = itoa(argc-1); |
| 749 | break; |
| 750 | case '!': |
| 751 | if (lastBgPid==-1) |
| 752 | *(prog->argv[argc_l - 1])='\0'; |
| 753 | else |
| 754 | prog->argv[argc_l - 1] = itoa(lastBgPid); |
| 755 | break; |
| 756 | case '0':case '1':case '2':case '3':case '4': |
| 757 | case '5':case '6':case '7':case '8':case '9': |
| 758 | { |
| 759 | int index=*(prog->argv[argc_l - 1] + 1)-48; |
| 760 | if (index >= argc) { |
| 761 | *(prog->argv[argc_l - 1])='\0'; |
| 762 | } else { |
| 763 | prog->argv[argc_l - 1] = argv[index]; |
| 764 | } |
| 765 | } |
| 766 | break; |
| 767 | } |
| 768 | } |
| 769 | #endif |
| 770 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 771 | |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 772 | rc = glob(prog->argv[argc_l - 1], flags, NULL, &prog->globResult); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 773 | if (rc == GLOB_NOSPACE) { |
Matt Kraai | d537a95 | 2000-07-14 01:51:25 +0000 | [diff] [blame] | 774 | errorMsg("out of space during glob operation\n"); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 775 | return; |
| 776 | } else if (rc == GLOB_NOMATCH || |
| 777 | (!rc && (prog->globResult.gl_pathc - i) == 1 && |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 778 | strcmp(prog->argv[argc_l - 1], |
Eric Andersen | e92108a | 2000-07-26 00:53:56 +0000 | [diff] [blame] | 779 | prog->globResult.gl_pathv[i]) == 0)) { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 780 | /* we need to remove whatever \ quoting is still present */ |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 781 | src = dst = prog->argv[argc_l - 1]; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 782 | while (*src) { |
| 783 | if (*src != '\\') |
| 784 | *dst++ = *src; |
| 785 | src++; |
| 786 | } |
| 787 | *dst = '\0'; |
| 788 | } else if (!rc) { |
| 789 | argcAlloced += (prog->globResult.gl_pathc - i); |
| 790 | prog->argv = |
| 791 | realloc(prog->argv, argcAlloced * sizeof(*prog->argv)); |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 792 | memcpy(prog->argv + (argc_l - 1), prog->globResult.gl_pathv + i, |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 793 | sizeof(*(prog->argv)) * (prog->globResult.gl_pathc - i)); |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 794 | argc_l += (prog->globResult.gl_pathc - i - 1); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 795 | } |
| 796 | |
| 797 | *argcAllocedPtr = argcAlloced; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 798 | *argcPtr = argc_l; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 799 | } |
| 800 | |
| 801 | /* Return cmd->numProgs as 0 if no command is present (e.g. an empty |
| 802 | line). If a valid command is found, commandPtr is set to point to |
| 803 | the beginning of the next command (if the original command had more |
| 804 | then one job associated with it) or NULL if no more commands are |
| 805 | present. */ |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 806 | static int parseCommand(char **commandPtr, struct job *job, struct jobSet *jobList, int *inBg) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 807 | { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 808 | char *command; |
| 809 | char *returnCommand = NULL; |
| 810 | char *src, *buf, *chptr; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 811 | int argc_l = 0; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 812 | int done = 0; |
| 813 | int argvAlloced; |
| 814 | int i; |
| 815 | char quote = '\0'; |
| 816 | int count; |
| 817 | struct childProgram *prog; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 818 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 819 | /* skip leading white space */ |
| 820 | while (**commandPtr && isspace(**commandPtr)) |
| 821 | (*commandPtr)++; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 822 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 823 | /* this handles empty lines or leading '#' characters */ |
| 824 | if (!**commandPtr || (**commandPtr == '#')) { |
Eric Andersen | ec10b9d | 2000-07-14 01:13:11 +0000 | [diff] [blame] | 825 | job->numProgs=0; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 826 | return 0; |
| 827 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 828 | |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 829 | *inBg = 0; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 830 | job->numProgs = 1; |
Eric Andersen | ec10b9d | 2000-07-14 01:13:11 +0000 | [diff] [blame] | 831 | job->progs = xmalloc(sizeof(*job->progs)); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 832 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 833 | /* We set the argv elements to point inside of this string. The |
Eric Andersen | b54833c | 2000-07-03 23:56:26 +0000 | [diff] [blame] | 834 | memory is freed by freeJob(). Allocate twice the original |
| 835 | length in case we need to quote every single character. |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 836 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 837 | Getting clean memory relieves us of the task of NULL |
| 838 | terminating things and makes the rest of this look a bit |
| 839 | cleaner (though it is, admittedly, a tad less efficient) */ |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 840 | job->cmdBuf = command = calloc(2*strlen(*commandPtr) + 1, sizeof(char)); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 841 | job->text = NULL; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 842 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 843 | prog = job->progs; |
| 844 | prog->numRedirections = 0; |
| 845 | prog->redirections = NULL; |
| 846 | prog->freeGlob = 0; |
| 847 | prog->isStopped = 0; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 848 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 849 | argvAlloced = 5; |
Eric Andersen | ec10b9d | 2000-07-14 01:13:11 +0000 | [diff] [blame] | 850 | prog->argv = xmalloc(sizeof(*prog->argv) * argvAlloced); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 851 | prog->argv[0] = job->cmdBuf; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 852 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 853 | buf = command; |
| 854 | src = *commandPtr; |
| 855 | while (*src && !done) { |
| 856 | if (quote == *src) { |
| 857 | quote = '\0'; |
| 858 | } else if (quote) { |
| 859 | if (*src == '\\') { |
| 860 | src++; |
| 861 | if (!*src) { |
Matt Kraai | d537a95 | 2000-07-14 01:51:25 +0000 | [diff] [blame] | 862 | errorMsg("character expected after \\\n"); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 863 | freeJob(job); |
| 864 | return 1; |
| 865 | } |
| 866 | |
| 867 | /* in shell, "\'" should yield \' */ |
| 868 | if (*src != quote) |
| 869 | *buf++ = '\\'; |
| 870 | } else if (*src == '*' || *src == '?' || *src == '[' || |
| 871 | *src == ']') *buf++ = '\\'; |
| 872 | *buf++ = *src; |
| 873 | } else if (isspace(*src)) { |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 874 | if (*prog->argv[argc_l]) { |
| 875 | buf++, argc_l++; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 876 | /* +1 here leaves room for the NULL which ends argv */ |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 877 | if ((argc_l + 1) == argvAlloced) { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 878 | argvAlloced += 5; |
| 879 | prog->argv = realloc(prog->argv, |
| 880 | sizeof(*prog->argv) * |
| 881 | argvAlloced); |
| 882 | } |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 883 | globLastArgument(prog, &argc_l, &argvAlloced); |
| 884 | prog->argv[argc_l] = buf; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 885 | } |
| 886 | } else |
| 887 | switch (*src) { |
| 888 | case '"': |
| 889 | case '\'': |
| 890 | quote = *src; |
| 891 | break; |
| 892 | |
| 893 | case '#': /* comment */ |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 894 | if (*(src-1)== '$') |
| 895 | *buf++ = *src; |
| 896 | else |
| 897 | done = 1; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 898 | break; |
| 899 | |
| 900 | case '>': /* redirections */ |
| 901 | case '<': |
| 902 | i = prog->numRedirections++; |
| 903 | prog->redirections = realloc(prog->redirections, |
| 904 | sizeof(*prog->redirections) * |
| 905 | (i + 1)); |
| 906 | |
| 907 | prog->redirections[i].fd = -1; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 908 | if (buf != prog->argv[argc_l]) { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 909 | /* the stuff before this character may be the file number |
| 910 | being redirected */ |
| 911 | prog->redirections[i].fd = |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 912 | strtol(prog->argv[argc_l], &chptr, 10); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 913 | |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 914 | if (*chptr && *prog->argv[argc_l]) { |
| 915 | buf++, argc_l++; |
| 916 | globLastArgument(prog, &argc_l, &argvAlloced); |
| 917 | prog->argv[argc_l] = buf; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 918 | } |
| 919 | } |
| 920 | |
| 921 | if (prog->redirections[i].fd == -1) { |
| 922 | if (*src == '>') |
| 923 | prog->redirections[i].fd = 1; |
| 924 | else |
| 925 | prog->redirections[i].fd = 0; |
| 926 | } |
| 927 | |
| 928 | if (*src++ == '>') { |
| 929 | if (*src == '>') |
| 930 | prog->redirections[i].type = |
| 931 | REDIRECT_APPEND, src++; |
| 932 | else |
| 933 | prog->redirections[i].type = REDIRECT_OVERWRITE; |
| 934 | } else { |
| 935 | prog->redirections[i].type = REDIRECT_INPUT; |
| 936 | } |
| 937 | |
| 938 | /* This isn't POSIX sh compliant. Oh well. */ |
| 939 | chptr = src; |
| 940 | while (isspace(*chptr)) |
| 941 | chptr++; |
| 942 | |
| 943 | if (!*chptr) { |
Matt Kraai | d537a95 | 2000-07-14 01:51:25 +0000 | [diff] [blame] | 944 | errorMsg("file name expected after %c\n", *src); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 945 | freeJob(job); |
Eric Andersen | ec10b9d | 2000-07-14 01:13:11 +0000 | [diff] [blame] | 946 | job->numProgs=0; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 947 | return 1; |
| 948 | } |
| 949 | |
| 950 | prog->redirections[i].filename = buf; |
| 951 | while (*chptr && !isspace(*chptr)) |
| 952 | *buf++ = *chptr++; |
| 953 | |
| 954 | src = chptr - 1; /* we src++ later */ |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 955 | prog->argv[argc_l] = ++buf; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 956 | break; |
| 957 | |
| 958 | case '|': /* pipe */ |
| 959 | /* finish this command */ |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 960 | if (*prog->argv[argc_l]) |
| 961 | argc_l++; |
| 962 | if (!argc_l) { |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 963 | errorMsg("empty command in pipe\n"); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 964 | freeJob(job); |
Eric Andersen | ec10b9d | 2000-07-14 01:13:11 +0000 | [diff] [blame] | 965 | job->numProgs=0; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 966 | return 1; |
| 967 | } |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 968 | prog->argv[argc_l] = NULL; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 969 | |
| 970 | /* and start the next */ |
| 971 | job->numProgs++; |
| 972 | job->progs = realloc(job->progs, |
| 973 | sizeof(*job->progs) * job->numProgs); |
| 974 | prog = job->progs + (job->numProgs - 1); |
| 975 | prog->numRedirections = 0; |
| 976 | prog->redirections = NULL; |
| 977 | prog->freeGlob = 0; |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 978 | prog->isStopped = 0; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 979 | argc_l = 0; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 980 | |
| 981 | argvAlloced = 5; |
Eric Andersen | ec10b9d | 2000-07-14 01:13:11 +0000 | [diff] [blame] | 982 | prog->argv = xmalloc(sizeof(*prog->argv) * argvAlloced); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 983 | prog->argv[0] = ++buf; |
| 984 | |
| 985 | src++; |
| 986 | while (*src && isspace(*src)) |
| 987 | src++; |
| 988 | |
| 989 | if (!*src) { |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 990 | errorMsg("empty command in pipe\n"); |
Eric Andersen | ec10b9d | 2000-07-14 01:13:11 +0000 | [diff] [blame] | 991 | freeJob(job); |
| 992 | job->numProgs=0; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 993 | return 1; |
| 994 | } |
| 995 | src--; /* we'll ++ it at the end of the loop */ |
| 996 | |
| 997 | break; |
| 998 | |
| 999 | case '&': /* background */ |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 1000 | *inBg = 1; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1001 | case ';': /* multiple commands */ |
| 1002 | done = 1; |
| 1003 | returnCommand = *commandPtr + (src - *commandPtr) + 1; |
| 1004 | break; |
| 1005 | |
| 1006 | case '\\': |
| 1007 | src++; |
| 1008 | if (!*src) { |
Matt Kraai | d537a95 | 2000-07-14 01:51:25 +0000 | [diff] [blame] | 1009 | errorMsg("character expected after \\\n"); |
Eric Andersen | ec10b9d | 2000-07-14 01:13:11 +0000 | [diff] [blame] | 1010 | freeJob(job); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1011 | return 1; |
| 1012 | } |
| 1013 | if (*src == '*' || *src == '[' || *src == ']' |
| 1014 | || *src == '?') *buf++ = '\\'; |
| 1015 | /* fallthrough */ |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 1016 | #ifdef BB_FEATURE_SH_BACKTICKS |
Eric Andersen | ec10b9d | 2000-07-14 01:13:11 +0000 | [diff] [blame] | 1017 | case '`': |
| 1018 | /* Exec a backtick-ed command */ |
| 1019 | { |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 1020 | char* charptr1=NULL, *charptr2; |
Eric Andersen | ec10b9d | 2000-07-14 01:13:11 +0000 | [diff] [blame] | 1021 | char* ptr=NULL; |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 1022 | struct job *newJob; |
| 1023 | struct jobSet njobList = { NULL, NULL }; |
| 1024 | int pipefd[2]; |
| 1025 | int size; |
Eric Andersen | ec10b9d | 2000-07-14 01:13:11 +0000 | [diff] [blame] | 1026 | |
| 1027 | ptr=strchr(++src, '`'); |
| 1028 | if (ptr==NULL) { |
| 1029 | fprintf(stderr, "Unmatched '`' in command\n"); |
| 1030 | freeJob(job); |
| 1031 | return 1; |
| 1032 | } |
| 1033 | |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 1034 | /* Make some space to hold just the backticked command */ |
Eric Andersen | 6efc48c | 2000-07-18 08:16:39 +0000 | [diff] [blame] | 1035 | charptr1 = charptr2 = xmalloc(1+ptr-src); |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 1036 | snprintf(charptr1, 1+ptr-src, src); |
| 1037 | newJob = xmalloc(sizeof(struct job)); |
| 1038 | /* Now parse and run the backticked command */ |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 1039 | if (!parseCommand(&charptr1, newJob, &njobList, inBg) |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 1040 | && newJob->numProgs) { |
| 1041 | pipe(pipefd); |
| 1042 | runCommand(newJob, &njobList, 0, pipefd); |
Eric Andersen | ec10b9d | 2000-07-14 01:13:11 +0000 | [diff] [blame] | 1043 | } |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 1044 | checkJobs(jobList); |
Eric Andersen | 6efc48c | 2000-07-18 08:16:39 +0000 | [diff] [blame] | 1045 | freeJob(newJob); |
| 1046 | free(charptr2); |
| 1047 | |
| 1048 | /* Make a copy of any stuff left over in the command |
| 1049 | * line after the second backtick */ |
| 1050 | charptr2 = xmalloc(strlen(ptr)+1); |
| 1051 | memcpy(charptr2, ptr+1, strlen(ptr)); |
| 1052 | |
Eric Andersen | ec10b9d | 2000-07-14 01:13:11 +0000 | [diff] [blame] | 1053 | |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 1054 | /* Copy the output from the backtick-ed command into the |
| 1055 | * command line, making extra room as needed */ |
| 1056 | --src; |
| 1057 | charptr1 = xmalloc(BUFSIZ); |
| 1058 | while ( (size=fullRead(pipefd[0], charptr1, BUFSIZ-1)) >0) { |
| 1059 | int newSize=src - *commandPtr + size + 1 + strlen(charptr2); |
| 1060 | if (newSize > BUFSIZ) { |
| 1061 | *commandPtr=realloc(*commandPtr, src - *commandPtr + |
| 1062 | size + 1 + strlen(charptr2)); |
| 1063 | } |
| 1064 | memcpy(src, charptr1, size); |
| 1065 | src+=size; |
| 1066 | } |
| 1067 | free(charptr1); |
| 1068 | close(pipefd[0]); |
| 1069 | if (*(src-1)=='\n') |
| 1070 | --src; |
| 1071 | |
| 1072 | /* Now paste into the *commandPtr all the stuff |
| 1073 | * leftover after the second backtick */ |
| 1074 | memcpy(src, charptr2, strlen(charptr2)); |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 1075 | free(charptr2); |
| 1076 | |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 1077 | /* Now recursively call parseCommand to deal with the new |
| 1078 | * and improved version of the command line with the backtick |
| 1079 | * results expanded in place... */ |
Eric Andersen | 6efc48c | 2000-07-18 08:16:39 +0000 | [diff] [blame] | 1080 | freeJob(job); |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 1081 | return(parseCommand(commandPtr, job, jobList, inBg)); |
Eric Andersen | ec10b9d | 2000-07-14 01:13:11 +0000 | [diff] [blame] | 1082 | } |
| 1083 | break; |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 1084 | #endif // BB_FEATURE_SH_BACKTICKS |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1085 | default: |
| 1086 | *buf++ = *src; |
| 1087 | } |
| 1088 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 1089 | src++; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1090 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1091 | |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 1092 | if (*prog->argv[argc_l]) { |
| 1093 | argc_l++; |
| 1094 | globLastArgument(prog, &argc_l, &argvAlloced); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1095 | } |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 1096 | if (!argc_l) { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1097 | freeJob(job); |
| 1098 | return 0; |
| 1099 | } |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 1100 | prog->argv[argc_l] = NULL; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1101 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1102 | if (!returnCommand) { |
Eric Andersen | ec10b9d | 2000-07-14 01:13:11 +0000 | [diff] [blame] | 1103 | job->text = xmalloc(strlen(*commandPtr) + 1); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1104 | strcpy(job->text, *commandPtr); |
| 1105 | } else { |
| 1106 | /* This leaves any trailing spaces, which is a bit sloppy */ |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1107 | count = returnCommand - *commandPtr; |
Eric Andersen | ec10b9d | 2000-07-14 01:13:11 +0000 | [diff] [blame] | 1108 | job->text = xmalloc(count + 1); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1109 | strncpy(job->text, *commandPtr, count); |
| 1110 | job->text[count] = '\0'; |
| 1111 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1112 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1113 | *commandPtr = returnCommand; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1114 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 1115 | return 0; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1116 | } |
| 1117 | |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 1118 | static int runCommand(struct job *newJob, struct jobSet *jobList, int inBg, int outPipe[2]) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1119 | { |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 1120 | struct job *theJob; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1121 | int i; |
Eric Andersen | 6efc48c | 2000-07-18 08:16:39 +0000 | [diff] [blame] | 1122 | int nextin, nextout; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1123 | int pipefds[2]; /* pipefd[0] is for reading */ |
| 1124 | struct builtInCommand *x; |
Eric Andersen | b54833c | 2000-07-03 23:56:26 +0000 | [diff] [blame] | 1125 | #ifdef BB_FEATURE_SH_STANDALONE_SHELL |
Erik Andersen | bcd6177 | 2000-05-13 06:33:19 +0000 | [diff] [blame] | 1126 | const struct BB_applet *a = applets; |
| 1127 | #endif |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1128 | |
Eric Andersen | 6efc48c | 2000-07-18 08:16:39 +0000 | [diff] [blame] | 1129 | |
| 1130 | nextin = 0, nextout = 1; |
Eric Andersen | ec10b9d | 2000-07-14 01:13:11 +0000 | [diff] [blame] | 1131 | for (i = 0; i < newJob->numProgs; i++) { |
| 1132 | if ((i + 1) < newJob->numProgs) { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1133 | pipe(pipefds); |
| 1134 | nextout = pipefds[1]; |
| 1135 | } else { |
Eric Andersen | 6efc48c | 2000-07-18 08:16:39 +0000 | [diff] [blame] | 1136 | if (outPipe[1]!=-1) { |
| 1137 | nextout = outPipe[1]; |
| 1138 | } else { |
| 1139 | nextout = 1; |
| 1140 | } |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1141 | } |
| 1142 | |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 1143 | #ifdef BB_FEATURE_SH_ENVIRONMENT |
| 1144 | if (showXtrace==TRUE) { |
| 1145 | int j; |
| 1146 | fprintf(stderr, "+ "); |
| 1147 | for (j = 0; newJob->progs[i].argv[j]; j++) |
| 1148 | fprintf(stderr, "%s ", newJob->progs[i].argv[j]); |
| 1149 | fprintf(stderr, "\n"); |
| 1150 | } |
| 1151 | #endif |
| 1152 | |
Eric Andersen | 34e1941 | 2000-07-10 18:47:24 +0000 | [diff] [blame] | 1153 | /* Check if the command matches any non-forking builtins */ |
Erik Andersen | 330fd2b | 2000-05-19 05:35:19 +0000 | [diff] [blame] | 1154 | for (x = bltins; x->cmd; x++) { |
Eric Andersen | e92108a | 2000-07-26 00:53:56 +0000 | [diff] [blame] | 1155 | if (strcmp(newJob->progs[i].argv[0], x->cmd) == 0 ) { |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 1156 | return(x->function(newJob, jobList)); |
Erik Andersen | 330fd2b | 2000-05-19 05:35:19 +0000 | [diff] [blame] | 1157 | } |
| 1158 | } |
| 1159 | |
Eric Andersen | ec10b9d | 2000-07-14 01:13:11 +0000 | [diff] [blame] | 1160 | if (!(newJob->progs[i].pid = fork())) { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1161 | signal(SIGTTOU, SIG_DFL); |
| 1162 | |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 1163 | if (outPipe[1]!=-1) { |
| 1164 | close(outPipe[0]); |
Eric Andersen | 6efc48c | 2000-07-18 08:16:39 +0000 | [diff] [blame] | 1165 | } |
| 1166 | if (nextin != 0) { |
| 1167 | dup2(nextin, 0); |
| 1168 | close(nextin); |
| 1169 | } |
| 1170 | |
| 1171 | if (nextout != 1) { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1172 | dup2(nextout, 1); |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 1173 | dup2(nextout, 2); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1174 | close(nextout); |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 1175 | close(pipefds[0]); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1176 | } |
| 1177 | |
| 1178 | /* explicit redirections override pipes */ |
Eric Andersen | ec10b9d | 2000-07-14 01:13:11 +0000 | [diff] [blame] | 1179 | setupRedirections(newJob->progs + i); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1180 | |
Eric Andersen | 34e1941 | 2000-07-10 18:47:24 +0000 | [diff] [blame] | 1181 | /* Check if the command matches any of the other builtins */ |
Erik Andersen | 330fd2b | 2000-05-19 05:35:19 +0000 | [diff] [blame] | 1182 | for (x = bltins_forking; x->cmd; x++) { |
Eric Andersen | e92108a | 2000-07-26 00:53:56 +0000 | [diff] [blame] | 1183 | if (strcmp(newJob->progs[i].argv[0], x->cmd) == 0) { |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 1184 | applet_name=x->cmd; |
Eric Andersen | ec10b9d | 2000-07-14 01:13:11 +0000 | [diff] [blame] | 1185 | exit (x->function(newJob, jobList)); |
Erik Andersen | bcd6177 | 2000-05-13 06:33:19 +0000 | [diff] [blame] | 1186 | } |
| 1187 | } |
Eric Andersen | b54833c | 2000-07-03 23:56:26 +0000 | [diff] [blame] | 1188 | #ifdef BB_FEATURE_SH_STANDALONE_SHELL |
Eric Andersen | 34e1941 | 2000-07-10 18:47:24 +0000 | [diff] [blame] | 1189 | /* Check if the command matches any busybox internal commands here */ |
Erik Andersen | bcd6177 | 2000-05-13 06:33:19 +0000 | [diff] [blame] | 1190 | while (a->name != 0) { |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 1191 | if (strcmp(get_last_path_component(newJob->progs[i].argv[0]), a->name) == 0) { |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 1192 | int argc_l; |
Eric Andersen | ec10b9d | 2000-07-14 01:13:11 +0000 | [diff] [blame] | 1193 | char** argv=newJob->progs[i].argv; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 1194 | for(argc_l=0;*argv!=NULL; argv++, argc_l++); |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 1195 | applet_name=a->name; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 1196 | exit((*(a->main)) (argc_l, newJob->progs[i].argv)); |
Erik Andersen | bcd6177 | 2000-05-13 06:33:19 +0000 | [diff] [blame] | 1197 | } |
| 1198 | a++; |
| 1199 | } |
| 1200 | #endif |
| 1201 | |
Eric Andersen | ec10b9d | 2000-07-14 01:13:11 +0000 | [diff] [blame] | 1202 | execvp(newJob->progs[i].argv[0], newJob->progs[i].argv); |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 1203 | fatalError("%s: %s\n", newJob->progs[i].argv[0], |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1204 | strerror(errno)); |
| 1205 | } |
Eric Andersen | 6efc48c | 2000-07-18 08:16:39 +0000 | [diff] [blame] | 1206 | if (outPipe[1]!=-1) { |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 1207 | close(outPipe[1]); |
| 1208 | } |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1209 | |
| 1210 | /* put our child in the process group whose leader is the |
| 1211 | first process in this pipe */ |
Eric Andersen | ec10b9d | 2000-07-14 01:13:11 +0000 | [diff] [blame] | 1212 | setpgid(newJob->progs[i].pid, newJob->progs[0].pid); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1213 | if (nextin != 0) |
| 1214 | close(nextin); |
Eric Andersen | 6efc48c | 2000-07-18 08:16:39 +0000 | [diff] [blame] | 1215 | if (nextout != 1) |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1216 | close(nextout); |
| 1217 | |
| 1218 | /* If there isn't another process, nextin is garbage |
| 1219 | but it doesn't matter */ |
| 1220 | nextin = pipefds[0]; |
| 1221 | } |
| 1222 | |
Eric Andersen | ec10b9d | 2000-07-14 01:13:11 +0000 | [diff] [blame] | 1223 | newJob->pgrp = newJob->progs[0].pid; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1224 | |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 1225 | /* find the ID for the theJob to use */ |
Eric Andersen | ec10b9d | 2000-07-14 01:13:11 +0000 | [diff] [blame] | 1226 | newJob->jobId = 1; |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 1227 | for (theJob = jobList->head; theJob; theJob = theJob->next) |
| 1228 | if (theJob->jobId >= newJob->jobId) |
| 1229 | newJob->jobId = theJob->jobId + 1; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1230 | |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 1231 | /* add the theJob to the list of running jobs */ |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1232 | if (!jobList->head) { |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 1233 | theJob = jobList->head = malloc(sizeof(*theJob)); |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 1234 | } else { |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 1235 | for (theJob = jobList->head; theJob->next; theJob = theJob->next); |
| 1236 | theJob->next = malloc(sizeof(*theJob)); |
| 1237 | theJob = theJob->next; |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 1238 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1239 | |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 1240 | *theJob = *newJob; |
| 1241 | theJob->next = NULL; |
| 1242 | theJob->runningProgs = theJob->numProgs; |
| 1243 | theJob->stoppedProgs = 0; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1244 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1245 | if (inBg) { |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 1246 | /* we don't wait for background theJobs to return -- append it |
| 1247 | to the list of backgrounded theJobs and leave it alone */ |
| 1248 | printf("[%d] %d\n", theJob->jobId, |
Eric Andersen | ec10b9d | 2000-07-14 01:13:11 +0000 | [diff] [blame] | 1249 | newJob->progs[newJob->numProgs - 1].pid); |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 1250 | #ifdef BB_FEATURE_SH_ENVIRONMENT |
| 1251 | lastBgPid=newJob->progs[newJob->numProgs - 1].pid; |
| 1252 | #endif |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1253 | } else { |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 1254 | jobList->fg = theJob; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1255 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1256 | /* move the new process group into the foreground */ |
Eric Andersen | 1c314ad | 2000-06-28 16:56:25 +0000 | [diff] [blame] | 1257 | /* suppress messages when run from /linuxrc mag@sysgo.de */ |
Eric Andersen | ec10b9d | 2000-07-14 01:13:11 +0000 | [diff] [blame] | 1258 | if (tcsetpgrp(0, newJob->pgrp) && errno != ENOTTY) |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1259 | perror("tcsetpgrp"); |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 1260 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1261 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1262 | return 0; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1263 | } |
| 1264 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 1265 | static int busy_loop(FILE * input) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1266 | { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1267 | char *command; |
| 1268 | char *nextCommand = NULL; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1269 | struct job newJob; |
Eric Andersen | 1c314ad | 2000-06-28 16:56:25 +0000 | [diff] [blame] | 1270 | pid_t parent_pgrp; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1271 | int i; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1272 | int inBg; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 1273 | int status; |
| 1274 | newJob.jobContext = REGULAR_JOB_CONTEXT; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1275 | |
Eric Andersen | 1c314ad | 2000-06-28 16:56:25 +0000 | [diff] [blame] | 1276 | /* save current owner of TTY so we can restore it on exit */ |
| 1277 | parent_pgrp = tcgetpgrp(0); |
| 1278 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1279 | command = (char *) calloc(BUFSIZ, sizeof(char)); |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 1280 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1281 | /* don't pay any attention to this signal; it just confuses |
| 1282 | things and isn't really meant for shells anyway */ |
| 1283 | signal(SIGTTOU, SIG_IGN); |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 1284 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1285 | while (1) { |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 1286 | if (!jobList.fg) { |
| 1287 | /* no job is in the foreground */ |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1288 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 1289 | /* see if any background processes have exited */ |
| 1290 | checkJobs(&jobList); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1291 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 1292 | if (!nextCommand) { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1293 | if (getCommand(input, command)) |
| 1294 | break; |
| 1295 | nextCommand = command; |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 1296 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1297 | |
Eric Andersen | ec10b9d | 2000-07-14 01:13:11 +0000 | [diff] [blame] | 1298 | if (!parseCommand(&nextCommand, &newJob, &jobList, &inBg) && |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1299 | newJob.numProgs) { |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 1300 | int pipefds[2] = {-1,-1}; |
| 1301 | runCommand(&newJob, &jobList, inBg, pipefds); |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 1302 | } |
| 1303 | else { |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 1304 | free(command); |
| 1305 | command = (char *) calloc(BUFSIZ, sizeof(char)); |
Eric Andersen | 6efc48c | 2000-07-18 08:16:39 +0000 | [diff] [blame] | 1306 | nextCommand = NULL; |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 1307 | } |
| 1308 | } else { |
| 1309 | /* a job is running in the foreground; wait for it */ |
| 1310 | i = 0; |
| 1311 | while (!jobList.fg->progs[i].pid || |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 1312 | jobList.fg->progs[i].isStopped == 1) i++; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1313 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 1314 | waitpid(jobList.fg->progs[i].pid, &status, WUNTRACED); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1315 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 1316 | if (WIFEXITED(status) || WIFSIGNALED(status)) { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1317 | /* the child exited */ |
| 1318 | jobList.fg->runningProgs--; |
| 1319 | jobList.fg->progs[i].pid = 0; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1320 | |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 1321 | #ifdef BB_FEATURE_SH_ENVIRONMENT |
| 1322 | lastReturnCode=WEXITSTATUS(status); |
| 1323 | #endif |
| 1324 | #if 0 |
| 1325 | printf("'%s' exited -- return code %d\n", jobList.fg->text, lastReturnCode); |
| 1326 | #endif |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1327 | if (!jobList.fg->runningProgs) { |
| 1328 | /* child exited */ |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1329 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1330 | removeJob(&jobList, jobList.fg); |
| 1331 | jobList.fg = NULL; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1332 | } |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 1333 | } else { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1334 | /* the child was stopped */ |
| 1335 | jobList.fg->stoppedProgs++; |
| 1336 | jobList.fg->progs[i].isStopped = 1; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1337 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1338 | if (jobList.fg->stoppedProgs == jobList.fg->runningProgs) { |
| 1339 | printf("\n" JOB_STATUS_FORMAT, jobList.fg->jobId, |
| 1340 | "Stopped", jobList.fg->text); |
| 1341 | jobList.fg = NULL; |
| 1342 | } |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 1343 | } |
| 1344 | |
| 1345 | if (!jobList.fg) { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1346 | /* move the shell to the foreground */ |
Eric Andersen | 1c314ad | 2000-06-28 16:56:25 +0000 | [diff] [blame] | 1347 | /* suppress messages when run from /linuxrc mag@sysgo.de */ |
| 1348 | if (tcsetpgrp(0, getpid()) && errno != ENOTTY) |
| 1349 | perror("tcsetpgrp"); |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 1350 | } |
| 1351 | } |
| 1352 | } |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1353 | free(command); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1354 | |
Eric Andersen | 1c314ad | 2000-06-28 16:56:25 +0000 | [diff] [blame] | 1355 | /* return controlling TTY back to parent process group before exiting */ |
| 1356 | if (tcsetpgrp(0, parent_pgrp)) |
Eric Andersen | b54833c | 2000-07-03 23:56:26 +0000 | [diff] [blame] | 1357 | perror("tcsetpgrp"); |
| 1358 | |
| 1359 | /* return exit status if called with "-c" */ |
| 1360 | if (input == NULL && WIFEXITED(status)) |
| 1361 | return WEXITSTATUS(status); |
| 1362 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1363 | return 0; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1364 | } |
| 1365 | |
| 1366 | |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 1367 | #ifdef BB_FEATURE_CLEAN_UP |
| 1368 | void free_memory(void) |
| 1369 | { |
| 1370 | if (promptStr) |
| 1371 | free(promptStr); |
| 1372 | if (cwd) |
| 1373 | free(cwd); |
| 1374 | if (local_pending_command) |
| 1375 | free(local_pending_command); |
| 1376 | |
| 1377 | if (jobList.fg && !jobList.fg->runningProgs) { |
| 1378 | removeJob(&jobList, jobList.fg); |
| 1379 | } |
| 1380 | } |
| 1381 | #endif |
| 1382 | |
Eric Andersen | 6efc48c | 2000-07-18 08:16:39 +0000 | [diff] [blame] | 1383 | |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 1384 | int shell_main(int argc_l, char **argv_l) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1385 | { |
Eric Andersen | 6a4c33c | 2000-07-28 17:08:36 +0000 | [diff] [blame] | 1386 | int opt, interactive=FALSE; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1387 | FILE *input = stdin; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 1388 | argc = argc_l; |
| 1389 | argv = argv_l; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1390 | |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 1391 | |
| 1392 | //if (argv[0] && argv[0][0] == '-') { |
| 1393 | // builtin_source("/etc/profile"); |
| 1394 | //} |
| 1395 | |
| 1396 | while ((opt = getopt(argc, argv, "cx")) > 0) { |
| 1397 | switch (opt) { |
| 1398 | case 'c': |
| 1399 | input = NULL; |
| 1400 | local_pending_command = (char *) calloc(BUFSIZ, sizeof(char)); |
| 1401 | if (local_pending_command == 0) { |
| 1402 | fatalError("sh: out of memory\n"); |
| 1403 | } |
| 1404 | for(; optind<argc; optind++) |
| 1405 | { |
| 1406 | if (strlen(local_pending_command) + strlen(argv[optind]) >= BUFSIZ) { |
| 1407 | local_pending_command = realloc(local_pending_command, |
| 1408 | strlen(local_pending_command) + strlen(argv[optind])); |
| 1409 | if (local_pending_command==NULL) |
Eric Andersen | 6a4c33c | 2000-07-28 17:08:36 +0000 | [diff] [blame] | 1410 | fatalError("command too long\n"); |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 1411 | } |
| 1412 | strcat(local_pending_command, argv[optind]); |
| 1413 | if ( (optind + 1) < argc) |
| 1414 | strcat(local_pending_command, " "); |
| 1415 | } |
| 1416 | break; |
Eric Andersen | 1428c4f | 2000-07-28 15:19:30 +0000 | [diff] [blame] | 1417 | #ifdef BB_FEATURE_SH_ENVIRONMENT |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 1418 | case 'x': |
| 1419 | showXtrace = TRUE; |
| 1420 | break; |
Eric Andersen | 1428c4f | 2000-07-28 15:19:30 +0000 | [diff] [blame] | 1421 | #endif |
Eric Andersen | 6a4c33c | 2000-07-28 17:08:36 +0000 | [diff] [blame] | 1422 | case 'i': |
| 1423 | interactive = TRUE; |
| 1424 | break; |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 1425 | default: |
| 1426 | usage(shell_usage); |
| 1427 | } |
| 1428 | } |
Eric Andersen | 6a4c33c | 2000-07-28 17:08:36 +0000 | [diff] [blame] | 1429 | /* A shell is interactive if the `-i' flag was given, or if all of |
| 1430 | * the following conditions are met: |
| 1431 | * no -c command |
| 1432 | * no arguments remaining or the -s flag given |
| 1433 | * standard input is a terminal |
| 1434 | * standard output is a terminal |
| 1435 | * Refer to Posix.2, the description of the `sh' utility. */ |
| 1436 | if (interactive==TRUE || ( argv[optind]==NULL && input==stdin && isatty(fileno(stdin)) && isatty(fileno(stdout)))) { |
| 1437 | fprintf(stdout, "optind=%d argv[optind]='%s'\n", optind, argv[optind]); |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 1438 | /* Looks like they want an interactive shell */ |
| 1439 | fprintf(stdout, "\n\nBusyBox v%s (%s) Built-in shell\n", BB_VER, BB_BT); |
| 1440 | fprintf(stdout, "Enter 'help' for a list of built-in commands.\n\n"); |
Eric Andersen | 6a4c33c | 2000-07-28 17:08:36 +0000 | [diff] [blame] | 1441 | } else if (local_pending_command==NULL) { |
| 1442 | fprintf(stdout, "optind=%d argv[optind]='%s'\n", optind, argv[optind]); |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 1443 | input = fopen(argv[optind], "r"); |
| 1444 | if (!input) { |
| 1445 | fatalError("%s: %s\n", argv[optind], strerror(errno)); |
| 1446 | } |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 1447 | } |
| 1448 | |
Eric Andersen | 6efc48c | 2000-07-18 08:16:39 +0000 | [diff] [blame] | 1449 | /* initialize the cwd -- this is never freed...*/ |
| 1450 | cwd=(char*)xmalloc(sizeof(char)*MAX_LINE+1); |
| 1451 | getcwd(cwd, sizeof(char)*MAX_LINE); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1452 | |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 1453 | #ifdef BB_FEATURE_CLEAN_UP |
| 1454 | atexit(free_memory); |
| 1455 | #endif |
| 1456 | |
Erik Andersen | f0657d3 | 2000-04-12 17:49:52 +0000 | [diff] [blame] | 1457 | #ifdef BB_FEATURE_SH_COMMAND_EDITING |
Erik Andersen | f0657d3 | 2000-04-12 17:49:52 +0000 | [diff] [blame] | 1458 | win_changed(0); |
| 1459 | #endif |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1460 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1461 | return (busy_loop(input)); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1462 | } |