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Glenn L McGrathaa5a6022003-10-01 03:06:16 +00001/* vi: set sw=4 ts=4: */
Eric Andersen6b6b3f61999-10-28 16:06:25 +00002/*
Mark Whitley6315ce62000-07-10 22:55:51 +00003 * sed.c - very minimalist version of sed
Eric Andersen6b6b3f61999-10-28 16:06:25 +00004 *
Eric Andersenbdfd0d72001-10-24 05:00:29 +00005 * Copyright (C) 1999,2000,2001 by Lineo, inc. and Mark Whitley
6 * Copyright (C) 1999,2000,2001 by Mark Whitley <markw@codepoet.org>
Matt Kraai5ed78ad2002-01-03 21:12:34 +00007 * Copyright (C) 2002 Matt Kraai
Glenn L McGrathc6992fe2004-04-25 05:11:19 +00008 * Copyright (C) 2003 by Glenn McGrath <bug1@iinet.net.au>
Rob Landley25d82392004-04-01 09:23:30 +00009 * Copyright (C) 2003,2004 by Rob Landley <rob@landley.net>
Erik Andersen1266a131999-12-29 22:19:46 +000010 *
Rob Landleyfae1dc82005-11-20 07:44:35 +000011 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
Eric Andersen6b6b3f61999-10-28 16:06:25 +000012 */
13
Glenn L McGrathaa5a6022003-10-01 03:06:16 +000014/* Code overview.
15
16 Files are laid out to avoid unnecessary function declarations. So for
17 example, every function add_cmd calls occurs before add_cmd in this file.
18
19 add_cmd() is called on each line of sed command text (from a file or from
20 the command line). It calls get_address() and parse_cmd_args(). The
21 resulting sed_cmd_t structures are appended to a linked list
22 (sed_cmd_head/sed_cmd_tail).
23
Rob Landleydcc28662004-11-25 07:21:47 +000024 add_input_file() adds a FILE * to the list of input files. We need to
Rob Landleyfae1dc82005-11-20 07:44:35 +000025 know all input sources ahead of time to find the last line for the $ match.
Rob Landleydcc28662004-11-25 07:21:47 +000026
27 process_files() does actual sedding, reading data lines from each input FILE *
Glenn L McGrathaa5a6022003-10-01 03:06:16 +000028 (which could be stdin) and applying the sed command list (sed_cmd_head) to
29 each of the resulting lines.
30
31 sed_main() is where external code calls into this, with a command line.
32*/
33
34
Mark Whitley6315ce62000-07-10 22:55:51 +000035/*
36 Supported features and commands in this version of sed:
37
38 - comments ('#')
Mark Whitley94074a92000-07-14 00:00:15 +000039 - address matching: num|/matchstr/[,num|/matchstr/|$]command
40 - commands: (p)rint, (d)elete, (s)ubstitue (with g & I flags)
41 - edit commands: (a)ppend, (i)nsert, (c)hange
Mark Whitley1f3b9f22001-05-11 22:27:13 +000042 - file commands: (r)ead
Rob Landleyc63fe912005-10-30 10:08:13 +000043 - backreferences in substitution expressions (\0, \1, \2...\9)
Glenn L McGrathf50ce312003-03-09 15:12:24 +000044 - grouped commands: {cmd1;cmd2}
Glenn L McGrathbd9b32b2003-04-09 01:43:54 +000045 - transliteration (y/source-chars/dest-chars/)
46 - pattern space hold space storing / swapping (g, h, x)
Rob Landley93850a52005-05-18 06:34:37 +000047 - labels / branching (: label, b, t, T)
Glenn L McGrathf50ce312003-03-09 15:12:24 +000048
Mark Whitley6315ce62000-07-10 22:55:51 +000049 (Note: Specifying an address (range) to match is *optional*; commands
50 default to the whole pattern space if no specific address match was
51 requested.)
52
Glenn L McGrath2570b432003-09-16 05:25:43 +000053 Todo:
Glenn L McGrath2570b432003-09-16 05:25:43 +000054 - Create a wrapper around regex to make libc's regex conform with sed
Glenn L McGrathbd9b32b2003-04-09 01:43:54 +000055
Glenn L McGrathd5eadea2003-03-09 02:39:29 +000056 Reference http://www.opengroup.org/onlinepubs/007904975/utilities/sed.html
Mark Whitley6315ce62000-07-10 22:55:51 +000057*/
58
Eric Andersen6b6b3f61999-10-28 16:06:25 +000059#include <stdio.h>
Glenn L McGrath8d6395d2003-04-08 11:56:11 +000060#include <unistd.h> /* for getopt() */
Glenn L McGrath8d6395d2003-04-08 11:56:11 +000061#include <string.h> /* for strdup() */
Eric Andersen6b6b3f61999-10-28 16:06:25 +000062#include <errno.h>
Glenn L McGrath8d6395d2003-04-08 11:56:11 +000063#include <ctype.h> /* for isspace() */
Eric Andersened3ef502001-01-27 08:24:39 +000064#include <stdlib.h>
Eric Andersen3570a342000-09-25 21:45:58 +000065#include "busybox.h"
"Vladimir N. Oleynik"23f62fc2005-09-14 16:59:11 +000066#include "xregex.h"
Mark Whitley6315ce62000-07-10 22:55:51 +000067
Glenn L McGrathe7a8bc92003-03-09 10:23:57 +000068typedef struct sed_cmd_s {
Glenn L McGrathaa5a6022003-10-01 03:06:16 +000069 /* Ordered by alignment requirements: currently 36 bytes on x86 */
Mark Whitley2dc192f2000-11-03 19:47:00 +000070
Glenn L McGrathaa5a6022003-10-01 03:06:16 +000071 /* address storage */
72 regex_t *beg_match; /* sed -e '/match/cmd' */
73 regex_t *end_match; /* sed -e '/match/,/end_match/cmd' */
74 regex_t *sub_match; /* For 's/sub_match/string/' */
75 int beg_line; /* 'sed 1p' 0 == apply commands to all lines */
76 int end_line; /* 'sed 1,3p' 0 == one line only. -1 = last line ($) */
Mark Whitley6315ce62000-07-10 22:55:51 +000077
Glenn L McGrathaa5a6022003-10-01 03:06:16 +000078 FILE *file; /* File (sr) command writes to, -1 for none. */
79 char *string; /* Data string for (saicytb) commands. */
Glenn L McGrathfc4cb4d2003-04-12 16:10:42 +000080
Glenn L McGrathaa5a6022003-10-01 03:06:16 +000081 unsigned short which_match; /* (s) Which match to replace (0 for all) */
Glenn L McGrathfc4cb4d2003-04-12 16:10:42 +000082
Glenn L McGrathaa5a6022003-10-01 03:06:16 +000083 /* Bitfields (gcc won't group them if we don't) */
84 unsigned int invert:1; /* the '!' after the address */
85 unsigned int in_match:1; /* Next line also included in match? */
86 unsigned int no_newline:1; /* Last line written by (sr) had no '\n' */
87 unsigned int sub_p:1; /* (s) print option */
Glenn L McGrathc18ce372003-09-13 06:57:39 +000088
Mark Whitley2dc192f2000-11-03 19:47:00 +000089
Glenn L McGrathaa5a6022003-10-01 03:06:16 +000090 /* GENERAL FIELDS */
91 char cmd; /* The command char: abcdDgGhHilnNpPqrstwxy:={} */
92 struct sed_cmd_s *next; /* Next command (linked list, NULL terminated) */
Glenn L McGrathe7a8bc92003-03-09 10:23:57 +000093} sed_cmd_t;
Mark Whitley6315ce62000-07-10 22:55:51 +000094
95/* globals */
Glenn L McGrathbd9b32b2003-04-09 01:43:54 +000096/* options */
Rob Landleyce4f0e92004-10-30 06:54:19 +000097static int be_quiet, in_place, regex_type;
Eric Andersen14f5c8d2005-04-16 19:39:00 +000098static FILE *nonstdout;
99static char *outname,*hold_space;
Rob Landley53302f82004-02-18 09:54:15 +0000100
Rob Landleydcc28662004-11-25 07:21:47 +0000101/* List of input files */
Eric Andersen14f5c8d2005-04-16 19:39:00 +0000102static int input_file_count,current_input_file;
103static FILE **input_file_list;
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000104
Glenn L McGrathbd9b32b2003-04-09 01:43:54 +0000105static const char bad_format_in_subst[] =
106 "bad format in substitution expression";
Eric Andersen14f5c8d2005-04-16 19:39:00 +0000107static const char *const semicolon_whitespace = "; \n\r\t\v";
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000108
Eric Andersen14f5c8d2005-04-16 19:39:00 +0000109static regmatch_t regmatch[10];
Rob Landleyce4f0e92004-10-30 06:54:19 +0000110static regex_t *previous_regex_ptr;
Glenn L McGrathbd9b32b2003-04-09 01:43:54 +0000111
Glenn L McGrathc949bfa2003-03-28 03:53:31 +0000112/* linked list of sed commands */
113static sed_cmd_t sed_cmd_head;
114static sed_cmd_t *sed_cmd_tail = &sed_cmd_head;
Eric Andersen6b6b3f61999-10-28 16:06:25 +0000115
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000116/* Linked list of append lines */
Rob Landley5797c7f2005-05-18 05:56:16 +0000117struct append_list {
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000118 char *string;
119 struct append_list *next;
120};
Eric Andersen14f5c8d2005-04-16 19:39:00 +0000121static struct append_list *append_head=NULL, *append_tail=NULL;
Glenn L McGrathbd9b32b2003-04-09 01:43:54 +0000122
Eric Andersenbdfd0d72001-10-24 05:00:29 +0000123#ifdef CONFIG_FEATURE_CLEAN_UP
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000124static void free_and_close_stuff(void)
Mark Whitley6315ce62000-07-10 22:55:51 +0000125{
Glenn L McGrathbd9b32b2003-04-09 01:43:54 +0000126 sed_cmd_t *sed_cmd = sed_cmd_head.next;
Mark Whitley6315ce62000-07-10 22:55:51 +0000127
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000128 while(append_head) {
129 append_tail=append_head->next;
130 free(append_head->string);
131 free(append_head);
132 append_head=append_tail;
133 }
134
Glenn L McGrath56c633c2003-03-28 04:23:23 +0000135 while (sed_cmd) {
Glenn L McGrathbd9b32b2003-04-09 01:43:54 +0000136 sed_cmd_t *sed_cmd_next = sed_cmd->next;
Mark Whitley6315ce62000-07-10 22:55:51 +0000137
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000138 if(sed_cmd->file)
139 bb_xprint_and_close_file(sed_cmd->file);
140
Glenn L McGrath56c633c2003-03-28 04:23:23 +0000141 if (sed_cmd->beg_match) {
142 regfree(sed_cmd->beg_match);
143 free(sed_cmd->beg_match);
Erik Andersene49d5ec2000-02-08 19:58:47 +0000144 }
Glenn L McGrath56c633c2003-03-28 04:23:23 +0000145 if (sed_cmd->end_match) {
146 regfree(sed_cmd->end_match);
147 free(sed_cmd->end_match);
Mark Whitley6315ce62000-07-10 22:55:51 +0000148 }
Glenn L McGrath56c633c2003-03-28 04:23:23 +0000149 if (sed_cmd->sub_match) {
150 regfree(sed_cmd->sub_match);
151 free(sed_cmd->sub_match);
Mark Whitley6315ce62000-07-10 22:55:51 +0000152 }
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000153 free(sed_cmd->string);
Glenn L McGrath56c633c2003-03-28 04:23:23 +0000154 free(sed_cmd);
155 sed_cmd = sed_cmd_next;
Mark Whitley6315ce62000-07-10 22:55:51 +0000156 }
Rob Landleyce4f0e92004-10-30 06:54:19 +0000157
158 if(hold_space) free(hold_space);
Rob Landleydcc28662004-11-25 07:21:47 +0000159
160 while(current_input_file<input_file_count)
161 fclose(input_file_list[current_input_file++]);
Mark Whitley6315ce62000-07-10 22:55:51 +0000162}
Mark Whitleyc41e8c82000-07-12 23:35:21 +0000163#endif
Mark Whitley6315ce62000-07-10 22:55:51 +0000164
Rob Landley53302f82004-02-18 09:54:15 +0000165/* If something bad happens during -i operation, delete temp file */
166
167static void cleanup_outname(void)
168{
169 if(outname) unlink(outname);
170}
171
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000172/* strdup, replacing "\n" with '\n', and "\delimiter" with 'delimiter' */
173
174static void parse_escapes(char *dest, const char *string, int len, char from, char to)
175{
176 int i=0;
177
178 while(i<len) {
179 if(string[i] == '\\') {
Glenn L McGrath738fb332003-10-01 06:45:11 +0000180 if(!to || string[i+1] == from) {
181 *(dest++) = to ? to : string[i+1];
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000182 i+=2;
183 continue;
184 } else *(dest++)=string[i++];
185 }
186 *(dest++) = string[i++];
187 }
188 *dest=0;
189}
190
Rob Landleyfae1dc82005-11-20 07:44:35 +0000191static char *copy_parsing_escapes(const char *string, int len)
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000192{
193 char *dest=xmalloc(len+1);
194
195 parse_escapes(dest,string,len,'n','\n');
196 return dest;
197}
198
199
Mark Whitley6315ce62000-07-10 22:55:51 +0000200/*
Eric Andersen28b3c532001-01-02 11:01:31 +0000201 * index_of_next_unescaped_regexp_delim - walks left to right through a string
202 * beginning at a specified index and returns the index of the next regular
Eric Andersenaff114c2004-04-14 17:51:38 +0000203 * expression delimiter (typically a forward * slash ('/')) not preceded by
Eric Andersen28b3c532001-01-02 11:01:31 +0000204 * a backslash ('\').
Mark Whitley6315ce62000-07-10 22:55:51 +0000205 */
Glenn L McGrath8d6395d2003-04-08 11:56:11 +0000206static int index_of_next_unescaped_regexp_delim(const char delimiter,
Glenn L McGrathd4185b02003-04-11 17:10:23 +0000207 const char *str)
Mark Whitley6315ce62000-07-10 22:55:51 +0000208{
Matt Kraaia0065d52001-08-24 14:45:50 +0000209 int bracket = -1;
210 int escaped = 0;
Glenn L McGrathf01b46d2003-03-30 08:02:18 +0000211 int idx = 0;
Eric Andersenc52a6b02001-11-10 10:49:42 +0000212 char ch;
Matt Kraaia0065d52001-08-24 14:45:50 +0000213
Glenn L McGrath8d6395d2003-04-08 11:56:11 +0000214 for (; (ch = str[idx]); idx++) {
Matt Kraaia0065d52001-08-24 14:45:50 +0000215 if (bracket != -1) {
Glenn L McGrathd4185b02003-04-11 17:10:23 +0000216 if (ch == ']' && !(bracket == idx - 1 || (bracket == idx - 2
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000217 && str[idx - 1] == '^')))
Matt Kraaia0065d52001-08-24 14:45:50 +0000218 bracket = -1;
219 } else if (escaped)
220 escaped = 0;
Eric Andersenc52a6b02001-11-10 10:49:42 +0000221 else if (ch == '\\')
Matt Kraaia0065d52001-08-24 14:45:50 +0000222 escaped = 1;
Eric Andersenc52a6b02001-11-10 10:49:42 +0000223 else if (ch == '[')
Matt Kraaia0065d52001-08-24 14:45:50 +0000224 bracket = idx;
Glenn L McGrath1fb44672003-03-09 08:44:49 +0000225 else if (ch == delimiter)
Mark Whitley97562bd2000-07-17 20:06:42 +0000226 return idx;
227 }
Mark Whitley6315ce62000-07-10 22:55:51 +0000228
Mark Whitley97562bd2000-07-17 20:06:42 +0000229 /* if we make it to here, we've hit the end of the string */
230 return -1;
Mark Whitley6315ce62000-07-10 22:55:51 +0000231}
232
Glenn L McGrath8aac05b2003-09-14 04:06:12 +0000233/*
234 * Returns the index of the third delimiter
235 */
Glenn L McGrathf01b46d2003-03-30 08:02:18 +0000236static int parse_regex_delim(const char *cmdstr, char **match, char **replace)
237{
238 const char *cmdstr_ptr = cmdstr;
239 char delimiter;
240 int idx = 0;
241
Glenn L McGrath8aac05b2003-09-14 04:06:12 +0000242 /* verify that the 's' or 'y' is followed by something. That something
Glenn L McGrathf01b46d2003-03-30 08:02:18 +0000243 * (typically a 'slash') is now our regexp delimiter... */
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000244 if (*cmdstr == '\0') bb_error_msg_and_die(bad_format_in_subst);
245 delimiter = *(cmdstr_ptr++);
Glenn L McGrathf01b46d2003-03-30 08:02:18 +0000246
247 /* save the match string */
248 idx = index_of_next_unescaped_regexp_delim(delimiter, cmdstr_ptr);
249 if (idx == -1) {
Glenn L McGrath9a52bb62003-03-30 09:38:40 +0000250 bb_error_msg_and_die(bad_format_in_subst);
Glenn L McGrathf01b46d2003-03-30 08:02:18 +0000251 }
Rob Landleyfae1dc82005-11-20 07:44:35 +0000252 *match = copy_parsing_escapes(cmdstr_ptr, idx);
Glenn L McGrathf01b46d2003-03-30 08:02:18 +0000253
254 /* save the replacement string */
255 cmdstr_ptr += idx + 1;
256 idx = index_of_next_unescaped_regexp_delim(delimiter, cmdstr_ptr);
257 if (idx == -1) {
Glenn L McGrath9a52bb62003-03-30 09:38:40 +0000258 bb_error_msg_and_die(bad_format_in_subst);
Glenn L McGrathf01b46d2003-03-30 08:02:18 +0000259 }
Rob Landleyfae1dc82005-11-20 07:44:35 +0000260 *replace = copy_parsing_escapes(cmdstr_ptr, idx);
Glenn L McGrathf01b46d2003-03-30 08:02:18 +0000261
Glenn L McGrath8d6395d2003-04-08 11:56:11 +0000262 return ((cmdstr_ptr - cmdstr) + idx);
Glenn L McGrathf01b46d2003-03-30 08:02:18 +0000263}
264
Mark Whitley6315ce62000-07-10 22:55:51 +0000265/*
266 * returns the index in the string just past where the address ends.
267 */
Glenn L McGrath8d6395d2003-04-08 11:56:11 +0000268static int get_address(char *my_str, int *linenum, regex_t ** regex)
Mark Whitley6315ce62000-07-10 22:55:51 +0000269{
Glenn L McGrathe3e28d32003-09-15 09:22:04 +0000270 char *pos = my_str;
Glenn L McGrath8d6395d2003-04-08 11:56:11 +0000271
Glenn L McGrath8aac05b2003-09-14 04:06:12 +0000272 if (isdigit(*my_str)) {
273 *linenum = strtol(my_str, &pos, 10);
Glenn L McGrath1fb44672003-03-09 08:44:49 +0000274 /* endstr shouldnt ever equal NULL */
Glenn L McGrath8aac05b2003-09-14 04:06:12 +0000275 } else if (*my_str == '$') {
Mark Whitley0915c4b2001-06-11 23:50:06 +0000276 *linenum = -1;
Glenn L McGrath8aac05b2003-09-14 04:06:12 +0000277 pos++;
278 } else if (*my_str == '/' || *my_str == '\\') {
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000279 int next;
Glenn L McGrathf01b46d2003-03-30 08:02:18 +0000280 char delimiter;
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000281 char *temp;
Glenn L McGrath1fb44672003-03-09 08:44:49 +0000282
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000283 if (*my_str == '\\') delimiter = *(++pos);
284 else delimiter = '/';
Glenn L McGrath8aac05b2003-09-14 04:06:12 +0000285 next = index_of_next_unescaped_regexp_delim(delimiter, ++pos);
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000286 if (next == -1)
Manuel Novoa III cad53642003-03-19 09:13:01 +0000287 bb_error_msg_and_die("unterminated match expression");
Eric Andersenc7bda1c2004-03-15 08:29:22 +0000288
Rob Landleyfae1dc82005-11-20 07:44:35 +0000289 temp=copy_parsing_escapes(pos,next);
Glenn L McGrath8d6395d2003-04-08 11:56:11 +0000290 *regex = (regex_t *) xmalloc(sizeof(regex_t));
Eric Andersen98555482004-05-26 10:03:33 +0000291 xregcomp(*regex, temp, regex_type|REG_NEWLINE);
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000292 free(temp);
293 /* Move position to next character after last delimiter */
294 pos+=(next+1);
Mark Whitley6315ce62000-07-10 22:55:51 +0000295 }
Glenn L McGrath8aac05b2003-09-14 04:06:12 +0000296 return pos - my_str;
Mark Whitley6315ce62000-07-10 22:55:51 +0000297}
Erik Andersene49d5ec2000-02-08 19:58:47 +0000298
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000299/* Grab a filename. Whitespace at start is skipped, then goes to EOL. */
300static int parse_file_cmd(sed_cmd_t * sed_cmd, const char *filecmdstr, char **retval)
301{
302 int start = 0, idx, hack=0;
303
304 /* Skip whitespace, then grab filename to end of line */
305 while (isspace(filecmdstr[start])) start++;
306 idx=start;
307 while(filecmdstr[idx] && filecmdstr[idx]!='\n') idx++;
308 /* If lines glued together, put backslash back. */
309 if(filecmdstr[idx]=='\n') hack=1;
310 if(idx==start) bb_error_msg_and_die("Empty filename");
311 *retval = bb_xstrndup(filecmdstr+start, idx-start+hack+1);
312 if(hack) *(idx+*retval)='\\';
313
314 return idx;
315}
316
Eric Andersen638da752003-10-09 08:18:36 +0000317static int parse_subst_cmd(sed_cmd_t * const sed_cmd, char *substr)
Mark Whitley06f35292000-07-13 19:58:04 +0000318{
Eric Andersen98555482004-05-26 10:03:33 +0000319 int cflags = regex_type;
Mark Whitley06f35292000-07-13 19:58:04 +0000320 char *match;
321 int idx = 0;
322
323 /*
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000324 * A substitution command should look something like this:
325 * s/match/replace/ #gIpw
Mark Whitley0e4cec02000-08-21 21:29:20 +0000326 * || | |||
Mark Whitley06f35292000-07-13 19:58:04 +0000327 * mandatory optional
Mark Whitley06f35292000-07-13 19:58:04 +0000328 */
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000329 idx = parse_regex_delim(substr, &match, &sed_cmd->string);
Mark Whitley06f35292000-07-13 19:58:04 +0000330
Mark Whitley97562bd2000-07-17 20:06:42 +0000331 /* determine the number of back references in the match string */
332 /* Note: we compute this here rather than in the do_subst_command()
333 * function to save processor time, at the expense of a little more memory
334 * (4 bits) per sed_cmd */
Glenn L McGrath8d6395d2003-04-08 11:56:11 +0000335
Mark Whitley06f35292000-07-13 19:58:04 +0000336 /* process the flags */
Mark Whitley70705d72000-07-14 19:06:30 +0000337
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000338 sed_cmd->which_match=1;
339 while (substr[++idx]) {
340 /* Parse match number */
341 if(isdigit(substr[idx])) {
342 if(match[0]!='^') {
343 /* Match 0 treated as all, multiple matches we take the last one. */
344 char *pos=substr+idx;
345 sed_cmd->which_match=(unsigned short)strtol(substr+idx,&pos,10);
346 idx=pos-substr;
347 }
348 continue;
349 }
Rob Landley40ec4ae2004-01-04 06:42:14 +0000350 /* Skip spaces */
351 if(isspace(substr[idx])) continue;
352
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000353 switch (substr[idx]) {
354 /* Replace all occurrences */
355 case 'g':
356 if (match[0] != '^') sed_cmd->which_match = 0;
357 break;
358 /* Print pattern space */
359 case 'p':
360 sed_cmd->sub_p = 1;
361 break;
Rob Landleyfae1dc82005-11-20 07:44:35 +0000362 /* Write to file */
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000363 case 'w':
364 {
365 char *temp;
366 idx+=parse_file_cmd(sed_cmd,substr+idx,&temp);
Eric Andersenc7bda1c2004-03-15 08:29:22 +0000367
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000368 break;
369 }
370 /* Ignore case (gnu exension) */
371 case 'I':
372 cflags |= REG_ICASE;
373 break;
Rob Landleyfae1dc82005-11-20 07:44:35 +0000374 /* Comment */
375 case '#':
376 while(substr[++idx]);
377 /* Fall through */
378 /* End of command */
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000379 case ';':
380 case '}':
381 goto out;
382 default:
383 bb_error_msg_and_die("bad option in substitution expression");
384 }
385 }
Glenn L McGrath2570b432003-09-16 05:25:43 +0000386out:
Mark Whitley97562bd2000-07-17 20:06:42 +0000387 /* compile the match string into a regex */
Glenn L McGrathc1d95072003-04-08 06:42:45 +0000388 if (*match != '\0') {
389 /* If match is empty, we use last regex used at runtime */
Glenn L McGrath8d6395d2003-04-08 11:56:11 +0000390 sed_cmd->sub_match = (regex_t *) xmalloc(sizeof(regex_t));
Glenn L McGrathc1d95072003-04-08 06:42:45 +0000391 xregcomp(sed_cmd->sub_match, match, cflags);
392 }
Mark Whitley06f35292000-07-13 19:58:04 +0000393 free(match);
Mark Whitley70705d72000-07-14 19:06:30 +0000394
395 return idx;
Mark Whitley06f35292000-07-13 19:58:04 +0000396}
397
Glenn L McGrath2971ef12003-03-18 01:19:23 +0000398/*
399 * Process the commands arguments
400 */
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000401static char *parse_cmd_args(sed_cmd_t *sed_cmd, char *cmdstr)
Mark Whitley6315ce62000-07-10 22:55:51 +0000402{
Glenn L McGrath2f8a4012003-03-09 02:44:49 +0000403 /* handle (s)ubstitution command */
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000404 if (sed_cmd->cmd == 's') cmdstr += parse_subst_cmd(sed_cmd, cmdstr);
Glenn L McGrath2f8a4012003-03-09 02:44:49 +0000405 /* handle edit cmds: (a)ppend, (i)nsert, and (c)hange */
406 else if (strchr("aic", sed_cmd->cmd)) {
407 if ((sed_cmd->end_line || sed_cmd->end_match) && sed_cmd->cmd != 'c')
Glenn L McGrath8d6395d2003-04-08 11:56:11 +0000408 bb_error_msg_and_die
409 ("only a beginning address can be specified for edit commands");
Rob Landley25d82392004-04-01 09:23:30 +0000410 for(;;) {
411 if(*cmdstr=='\n' || *cmdstr=='\\') {
412 cmdstr++;
413 break;
414 } else if(isspace(*cmdstr)) cmdstr++;
415 else break;
416 }
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000417 sed_cmd->string = bb_xstrdup(cmdstr);
Glenn L McGrath738fb332003-10-01 06:45:11 +0000418 parse_escapes(sed_cmd->string,sed_cmd->string,strlen(cmdstr),0,0);
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000419 cmdstr += strlen(cmdstr);
Glenn L McGrath2f8a4012003-03-09 02:44:49 +0000420 /* handle file cmds: (r)ead */
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000421 } else if(strchr("rw", sed_cmd->cmd)) {
Glenn L McGrath2f8a4012003-03-09 02:44:49 +0000422 if (sed_cmd->end_line || sed_cmd->end_match)
Manuel Novoa III cad53642003-03-19 09:13:01 +0000423 bb_error_msg_and_die("Command only uses one address");
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000424 cmdstr += parse_file_cmd(sed_cmd, cmdstr, &sed_cmd->string);
425 if(sed_cmd->cmd=='w')
426 sed_cmd->file=bb_xfopen(sed_cmd->string,"w");
Glenn L McGrath961c6c12003-03-28 04:43:39 +0000427 /* handle branch commands */
Rob Landley93850a52005-05-18 06:34:37 +0000428 } else if (strchr(":btT", sed_cmd->cmd)) {
Glenn L McGrath961c6c12003-03-28 04:43:39 +0000429 int length;
430
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000431 while(isspace(*cmdstr)) cmdstr++;
Glenn L McGrathf4523562003-09-14 06:01:14 +0000432 length = strcspn(cmdstr, semicolon_whitespace);
433 if (length) {
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000434 sed_cmd->string = strndup(cmdstr, length);
Glenn L McGrathf4523562003-09-14 06:01:14 +0000435 cmdstr += length;
436 }
Glenn L McGrath961c6c12003-03-28 04:43:39 +0000437 }
Glenn L McGrathf01b46d2003-03-30 08:02:18 +0000438 /* translation command */
439 else if (sed_cmd->cmd == 'y') {
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000440 char *match, *replace;
441 int i=cmdstr[0];
442
443 cmdstr+=parse_regex_delim(cmdstr, &match, &replace)+1;
444 /* \n already parsed, but \delimiter needs unescaping. */
445 parse_escapes(match,match,strlen(match),i,i);
446 parse_escapes(replace,replace,strlen(replace),i,i);
447
448 sed_cmd->string = xcalloc(1, (strlen(match) + 1) * 2);
449 for (i = 0; match[i] && replace[i]; i++) {
450 sed_cmd->string[i * 2] = match[i];
451 sed_cmd->string[(i * 2) + 1] = replace[i];
452 }
453 free(match);
454 free(replace);
Glenn L McGrathf01b46d2003-03-30 08:02:18 +0000455 }
Glenn L McGrath2971ef12003-03-18 01:19:23 +0000456 /* if it wasnt a single-letter command that takes no arguments
457 * then it must be an invalid command.
458 */
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000459 else if (strchr("dDgGhHlnNpPqx={}", sed_cmd->cmd) == 0) {
Manuel Novoa III cad53642003-03-19 09:13:01 +0000460 bb_error_msg_and_die("Unsupported command %c", sed_cmd->cmd);
Mark Whitley1f3b9f22001-05-11 22:27:13 +0000461 }
Mark Whitley70705d72000-07-14 19:06:30 +0000462
463 /* give back whatever's left over */
Glenn L McGrath8d6395d2003-04-08 11:56:11 +0000464 return (cmdstr);
Eric Andersen50d63601999-11-09 01:47:36 +0000465}
Eric Andersen6b6b3f61999-10-28 16:06:25 +0000466
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000467
468/* Parse address+command sets, skipping comment lines. */
469
Eric Andersen14f5c8d2005-04-16 19:39:00 +0000470static void add_cmd(char *cmdstr)
Erik Andersen1266a131999-12-29 22:19:46 +0000471{
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000472 static char *add_cmd_line=NULL;
Glenn L McGrath8aac05b2003-09-14 04:06:12 +0000473 sed_cmd_t *sed_cmd;
Glenn L McGrath586d86c2003-10-09 07:22:59 +0000474 int temp;
Glenn L McGrath8aac05b2003-09-14 04:06:12 +0000475
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000476 /* Append this line to any unfinished line from last time. */
477 if(add_cmd_line) {
478 int lastlen=strlen(add_cmd_line);
Eric Andersen638da752003-10-09 08:18:36 +0000479 char *tmp=xmalloc(lastlen+strlen(cmdstr)+2);
Erik Andersen1266a131999-12-29 22:19:46 +0000480
Eric Andersen638da752003-10-09 08:18:36 +0000481 memcpy(tmp,add_cmd_line,lastlen);
482 tmp[lastlen]='\n';
483 strcpy(tmp+lastlen+1,cmdstr);
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000484 free(add_cmd_line);
Eric Andersen638da752003-10-09 08:18:36 +0000485 cmdstr=add_cmd_line=tmp;
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000486 } else add_cmd_line=NULL;
487
488 /* If this line ends with backslash, request next line. */
Glenn L McGrath586d86c2003-10-09 07:22:59 +0000489 temp=strlen(cmdstr);
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000490 if(temp && cmdstr[temp-1]=='\\') {
491 if(!add_cmd_line) add_cmd_line=strdup(cmdstr);
492 add_cmd_line[temp-1]=0;
493 return;
Glenn L McGrathf50ce312003-03-09 15:12:24 +0000494 }
Mark Whitley6315ce62000-07-10 22:55:51 +0000495
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000496 /* Loop parsing all commands in this line. */
497 while(*cmdstr) {
498 /* Skip leading whitespace and semicolons */
499 cmdstr += strspn(cmdstr, semicolon_whitespace);
500
501 /* If no more commands, exit. */
502 if(!*cmdstr) break;
503
504 /* if this is a comment, jump past it and keep going */
505 if (*cmdstr == '#') {
506 /* "#n" is the same as using -n on the command line */
507 if (cmdstr[1] == 'n') be_quiet++;
508 if(!(cmdstr=strpbrk(cmdstr, "\n\r"))) break;
509 continue;
Glenn L McGrathc1d95072003-04-08 06:42:45 +0000510 }
Glenn L McGrath8d6395d2003-04-08 11:56:11 +0000511
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000512 /* parse the command
513 * format is: [addr][,addr][!]cmd
514 * |----||-----||-|
515 * part1 part2 part3
Glenn L McGrathf50ce312003-03-09 15:12:24 +0000516 */
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000517
518 sed_cmd = xcalloc(1, sizeof(sed_cmd_t));
519
520 /* first part (if present) is an address: either a '$', a number or a /regex/ */
521 cmdstr += get_address(cmdstr, &sed_cmd->beg_line, &sed_cmd->beg_match);
522
523 /* second part (if present) will begin with a comma */
524 if (*cmdstr == ',') {
525 int idx;
526
Glenn L McGrathf50ce312003-03-09 15:12:24 +0000527 cmdstr++;
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000528 idx = get_address(cmdstr, &sed_cmd->end_line, &sed_cmd->end_match);
529 if (!idx) bb_error_msg_and_die("get_address: no address found in string\n");
530 cmdstr += idx;
Glenn L McGrathf50ce312003-03-09 15:12:24 +0000531 }
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000532
533 /* skip whitespace before the command */
534 while (isspace(*cmdstr)) cmdstr++;
535
536 /* Check for inversion flag */
537 if (*cmdstr == '!') {
538 sed_cmd->invert = 1;
539 cmdstr++;
540
541 /* skip whitespace before the command */
542 while (isspace(*cmdstr)) cmdstr++;
543 }
544
545 /* last part (mandatory) will be a command */
546 if (!*cmdstr) bb_error_msg_and_die("missing command");
547 sed_cmd->cmd = *(cmdstr++);
548 cmdstr = parse_cmd_args(sed_cmd, cmdstr);
549
550 /* Add the command to the command array */
551 sed_cmd_tail->next = sed_cmd;
552 sed_cmd_tail = sed_cmd_tail->next;
Glenn L McGrathf50ce312003-03-09 15:12:24 +0000553 }
554
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000555 /* If we glued multiple lines together, free the memory. */
556 if(add_cmd_line) {
557 free(add_cmd_line);
558 add_cmd_line=NULL;
Mark Whitley6315ce62000-07-10 22:55:51 +0000559 }
560}
561
Rob Landleydcc28662004-11-25 07:21:47 +0000562/* Append to a string, reallocating memory as necessary. */
563
Eric Andersen14f5c8d2005-04-16 19:39:00 +0000564static struct pipeline {
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000565 char *buf; /* Space to hold string */
566 int idx; /* Space used */
567 int len; /* Space allocated */
568} pipeline;
Eric Andersenc52a6b02001-11-10 10:49:42 +0000569
Glenn L McGrath8d6395d2003-04-08 11:56:11 +0000570#define PIPE_GROW 64
Eric Andersenc52a6b02001-11-10 10:49:42 +0000571
Eric Andersen14f5c8d2005-04-16 19:39:00 +0000572static void pipe_putc(char c)
Eric Andersenc52a6b02001-11-10 10:49:42 +0000573{
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000574 if(pipeline.idx==pipeline.len) {
575 pipeline.buf = xrealloc(pipeline.buf, pipeline.len + PIPE_GROW);
576 pipeline.len+=PIPE_GROW;
Eric Andersenc52a6b02001-11-10 10:49:42 +0000577 }
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000578 pipeline.buf[pipeline.idx++] = (c);
Eric Andersenc52a6b02001-11-10 10:49:42 +0000579}
580
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000581static void do_subst_w_backrefs(const char *line, const char *replace)
Mark Whitley97562bd2000-07-17 20:06:42 +0000582{
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000583 int i,j;
Mark Whitley97562bd2000-07-17 20:06:42 +0000584
585 /* go through the replacement string */
586 for (i = 0; replace[i]; i++) {
587 /* if we find a backreference (\1, \2, etc.) print the backref'ed * text */
Rob Landleyc63fe912005-10-30 10:08:13 +0000588 if (replace[i] == '\\' && replace[i+1]>='0' && replace[i+1]<='9') {
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000589 int backref=replace[++i]-'0';
Glenn L McGrath8d6395d2003-04-08 11:56:11 +0000590
Mark Whitley97562bd2000-07-17 20:06:42 +0000591 /* print out the text held in regmatch[backref] */
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000592 if(regmatch[backref].rm_so != -1)
593 for (j = regmatch[backref].rm_so; j < regmatch[backref].rm_eo; j++)
594 pipe_putc(line[j]);
Mark Whitley97562bd2000-07-17 20:06:42 +0000595 }
596
Mark Whitley83e85f62000-07-25 20:48:44 +0000597 /* if we find a backslash escaped character, print the character */
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000598 else if (replace[i] == '\\') pipe_putc(replace[++i]);
Mark Whitley83e85f62000-07-25 20:48:44 +0000599
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000600 /* if we find an unescaped '&' print out the whole matched text. */
601 else if (replace[i] == '&')
Mark Whitley97562bd2000-07-17 20:06:42 +0000602 for (j = regmatch[0].rm_so; j < regmatch[0].rm_eo; j++)
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000603 pipe_putc(line[j]);
604 /* Otherwise just output the character. */
605 else pipe_putc(replace[i]);
Mark Whitley97562bd2000-07-17 20:06:42 +0000606 }
607}
608
Glenn L McGrath8d6395d2003-04-08 11:56:11 +0000609static int do_subst_command(sed_cmd_t * sed_cmd, char **line)
Mark Whitley4f7fe772000-07-13 20:01:58 +0000610{
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000611 char *oldline = *line;
Mark Whitley4f7fe772000-07-13 20:01:58 +0000612 int altered = 0;
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000613 int match_count=0;
Glenn L McGrathc1d95072003-04-08 06:42:45 +0000614 regex_t *current_regex;
615
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000616 /* Handle empty regex. */
Glenn L McGrathc1d95072003-04-08 06:42:45 +0000617 if (sed_cmd->sub_match == NULL) {
618 current_regex = previous_regex_ptr;
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000619 if(!current_regex)
620 bb_error_msg_and_die("No previous regexp.");
621 } else previous_regex_ptr = current_regex = sed_cmd->sub_match;
Mark Whitley4f7fe772000-07-13 20:01:58 +0000622
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000623 /* Find the first match */
624 if(REG_NOMATCH==regexec(current_regex, oldline, 10, regmatch, 0))
Mark Whitley2dc192f2000-11-03 19:47:00 +0000625 return 0;
626
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000627 /* Initialize temporary output buffer. */
628 pipeline.buf=xmalloc(PIPE_GROW);
629 pipeline.len=PIPE_GROW;
630 pipeline.idx=0;
Mark Whitley2dc192f2000-11-03 19:47:00 +0000631
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000632 /* Now loop through, substituting for matches */
633 do {
Mark Whitley4f7fe772000-07-13 20:01:58 +0000634 int i;
Mark Whitley4f7fe772000-07-13 20:01:58 +0000635
Eric Andersenc06f5682004-02-04 10:57:46 +0000636 /* Work around bug in glibc regexec, demonstrated by:
637 echo " a.b" | busybox sed 's [^ .]* x g'
638 The match_count check is so not to break
639 echo "hi" | busybox sed 's/^/!/g' */
640 if(!regmatch[0].rm_so && !regmatch[0].rm_eo && match_count) {
641 pipe_putc(*(oldline++));
642 continue;
643 }
644
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000645 match_count++;
646
647 /* If we aren't interested in this match, output old line to
648 end of match and continue */
649 if(sed_cmd->which_match && sed_cmd->which_match!=match_count) {
650 for(i=0;i<regmatch[0].rm_eo;i++)
651 pipe_putc(oldline[i]);
652 continue;
653 }
654
Mark Whitley2dc192f2000-11-03 19:47:00 +0000655 /* print everything before the match */
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000656 for (i = 0; i < regmatch[0].rm_so; i++) pipe_putc(oldline[i]);
Mark Whitley97562bd2000-07-17 20:06:42 +0000657
Mark Whitley2dc192f2000-11-03 19:47:00 +0000658 /* then print the substitution string */
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000659 do_subst_w_backrefs(oldline, sed_cmd->string);
Mark Whitley97562bd2000-07-17 20:06:42 +0000660
Mark Whitley2dc192f2000-11-03 19:47:00 +0000661 /* advance past the match */
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000662 oldline += regmatch[0].rm_eo;
Mark Whitley2dc192f2000-11-03 19:47:00 +0000663 /* flag that something has changed */
664 altered++;
Mark Whitley97562bd2000-07-17 20:06:42 +0000665
Mark Whitley2dc192f2000-11-03 19:47:00 +0000666 /* if we're not doing this globally, get out now */
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000667 if (sed_cmd->which_match) break;
668 } while (*oldline && (regexec(current_regex, oldline, 10, regmatch, 0) != REG_NOMATCH));
Mark Whitley2dc192f2000-11-03 19:47:00 +0000669
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000670 /* Copy rest of string into output pipeline */
671
672 while(*oldline) pipe_putc(*(oldline++));
673 pipe_putc(0);
Mark Whitley2dc192f2000-11-03 19:47:00 +0000674
Eric Andersenb76cb682001-08-22 05:58:16 +0000675 free(*line);
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000676 *line = pipeline.buf;
Mark Whitley4f7fe772000-07-13 20:01:58 +0000677 return altered;
678}
Mark Whitley6315ce62000-07-10 22:55:51 +0000679
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000680/* Set command pointer to point to this label. (Does not handle null label.) */
Glenn L McGrath961c6c12003-03-28 04:43:39 +0000681static sed_cmd_t *branch_to(const char *label)
682{
683 sed_cmd_t *sed_cmd;
Glenn L McGrathd4185b02003-04-11 17:10:23 +0000684
Glenn L McGrathbd9b32b2003-04-09 01:43:54 +0000685 for (sed_cmd = sed_cmd_head.next; sed_cmd; sed_cmd = sed_cmd->next) {
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000686 if ((sed_cmd->cmd == ':') && (sed_cmd->string) && (strcmp(sed_cmd->string, label) == 0)) {
Glenn L McGrathf4523562003-09-14 06:01:14 +0000687 return (sed_cmd);
Glenn L McGrath961c6c12003-03-28 04:43:39 +0000688 }
689 }
Glenn L McGrathf4523562003-09-14 06:01:14 +0000690 bb_error_msg_and_die("Can't find label for jump to `%s'", label);
Glenn L McGrath961c6c12003-03-28 04:43:39 +0000691}
Mark Whitley6315ce62000-07-10 22:55:51 +0000692
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000693/* Append copy of string to append buffer */
694static void append(char *s)
695{
696 struct append_list *temp=calloc(1,sizeof(struct append_list));
697
698 if(append_head)
699 append_tail=(append_tail->next=temp);
700 else append_head=append_tail=temp;
701 temp->string=strdup(s);
702}
703
704static void flush_append(void)
705{
706 /* Output appended lines. */
707 while(append_head) {
Rob Landley53302f82004-02-18 09:54:15 +0000708 fprintf(nonstdout,"%s\n",append_head->string);
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000709 append_tail=append_head->next;
710 free(append_head->string);
711 free(append_head);
712 append_head=append_tail;
713 }
714 append_head=append_tail=NULL;
715}
716
Eric Andersen14f5c8d2005-04-16 19:39:00 +0000717static void add_input_file(FILE *file)
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000718{
Rob Landleydcc28662004-11-25 07:21:47 +0000719 input_file_list=xrealloc(input_file_list,(input_file_count+1)*sizeof(FILE *));
720 input_file_list[input_file_count++]=file;
721}
722
723/* Get next line of input from input_file_list, flushing append buffer and
724 * noting if we ran out of files without a newline on the last line we read.
725 */
726static char *get_next_line(int *no_newline)
727{
728 char *temp=NULL;
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000729 int len;
730
731 flush_append();
Rob Landleydcc28662004-11-25 07:21:47 +0000732 while(current_input_file<input_file_count) {
733 temp=bb_get_line_from_file(input_file_list[current_input_file]);
734 if(temp) {
735 len=strlen(temp);
736 *no_newline=!(len && temp[len-1]=='\n');
737 if(!*no_newline) temp[len-1]=0;
738 break;
739 } else fclose(input_file_list[current_input_file++]);
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000740 }
741
742 return temp;
743}
744
745/* Output line of text. missing_newline means the last line output did not
746 end with a newline. no_newline means this line does not end with a
747 newline. */
748
749static int puts_maybe_newline(char *s, FILE *file, int missing_newline, int no_newline)
750{
751 if(missing_newline) fputc('\n',file);
752 fputs(s,file);
753 if(!no_newline) fputc('\n',file);
754
Rob Landley53302f82004-02-18 09:54:15 +0000755 if(ferror(file)) {
756 fprintf(stderr,"Write failed.\n");
757 exit(4); /* It's what gnu sed exits with... */
758 }
759
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000760 return no_newline;
761}
762
Rob Landley53302f82004-02-18 09:54:15 +0000763#define sed_puts(s,n) missing_newline=puts_maybe_newline(s,nonstdout,missing_newline,n)
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000764
Rob Landleydcc28662004-11-25 07:21:47 +0000765static void process_files(void)
Mark Whitley6315ce62000-07-10 22:55:51 +0000766{
Rob Landleyce4f0e92004-10-30 06:54:19 +0000767 char *pattern_space, *next_line;
Rob Landleydcc28662004-11-25 07:21:47 +0000768 int linenum = 0, missing_newline=0;
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000769 int no_newline,next_no_newline=0;
Mark Whitley6315ce62000-07-10 22:55:51 +0000770
Rob Landleydcc28662004-11-25 07:21:47 +0000771 next_line = get_next_line(&next_no_newline);
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000772
Rob Landleydcc28662004-11-25 07:21:47 +0000773 /* go through every line in each file */
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000774 for(;;) {
Glenn L McGrathc949bfa2003-03-28 03:53:31 +0000775 sed_cmd_t *sed_cmd;
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000776 int substituted=0;
777
778 /* Advance to next line. Stop if out of lines. */
779 if(!(pattern_space=next_line)) break;
780 no_newline=next_no_newline;
Glenn L McGrath505bd0f2003-03-08 05:21:02 +0000781
782 /* Read one line in advance so we can act on the last line, the '$' address */
Rob Landleydcc28662004-11-25 07:21:47 +0000783 next_line = get_next_line(&next_no_newline);
Mark Whitley6315ce62000-07-10 22:55:51 +0000784 linenum++;
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000785restart:
Mark Whitley6315ce62000-07-10 22:55:51 +0000786 /* for every line, go through all the commands */
Glenn L McGrathd4185b02003-04-11 17:10:23 +0000787 for (sed_cmd = sed_cmd_head.next; sed_cmd; sed_cmd = sed_cmd->next) {
Eric Andersen52a3c272003-12-23 08:53:51 +0000788 int old_matched, matched;
789
790 old_matched = sed_cmd->in_match;
Mark Whitley0915c4b2001-06-11 23:50:06 +0000791
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000792 /* Determine if this command matches this line: */
793
794 /* Are we continuing a previous multi-line match? */
795
796 sed_cmd->in_match = sed_cmd->in_match
797
798 /* Or is no range necessary? */
799 || (!sed_cmd->beg_line && !sed_cmd->end_line
800 && !sed_cmd->beg_match && !sed_cmd->end_match)
801
802 /* Or did we match the start of a numerical range? */
803 || (sed_cmd->beg_line > 0 && (sed_cmd->beg_line == linenum))
804
805 /* Or does this line match our begin address regex? */
806 || (sed_cmd->beg_match &&
807 !regexec(sed_cmd->beg_match, pattern_space, 0, NULL, 0))
808
809 /* Or did we match last line of input? */
810 || (sed_cmd->beg_line == -1 && next_line == NULL);
811
812 /* Snapshot the value */
813
814 matched = sed_cmd->in_match;
815
816 /* Is this line the end of the current match? */
817
818 if(matched) {
819 sed_cmd->in_match = !(
820 /* has the ending line come, or is this a single address command? */
821 (sed_cmd->end_line ?
822 sed_cmd->end_line==-1 ?
823 !next_line
824 : sed_cmd->end_line<=linenum
825 : !sed_cmd->end_match)
826 /* or does this line matches our last address regex */
Eric Andersen52a3c272003-12-23 08:53:51 +0000827 || (sed_cmd->end_match && old_matched && (regexec(sed_cmd->end_match, pattern_space, 0, NULL, 0) == 0))
Glenn L McGrath8d6395d2003-04-08 11:56:11 +0000828 );
Glenn L McGrathfc4cb4d2003-04-12 16:10:42 +0000829 }
Glenn L McGrathfc4cb4d2003-04-12 16:10:42 +0000830
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000831 /* Skip blocks of commands we didn't match. */
832 if (sed_cmd->cmd == '{') {
833 if(sed_cmd->invert ? matched : !matched)
834 while(sed_cmd && sed_cmd->cmd!='}') sed_cmd=sed_cmd->next;
835 if(!sed_cmd) bb_error_msg_and_die("Unterminated {");
836 continue;
837 }
838
839 /* Okay, so did this line match? */
840 if (sed_cmd->invert ? !matched : matched) {
841 /* Update last used regex in case a blank substitute BRE is found */
Glenn L McGrathc1d95072003-04-08 06:42:45 +0000842 if (sed_cmd->beg_match) {
843 previous_regex_ptr = sed_cmd->beg_match;
844 }
Mark Whitley0915c4b2001-06-11 23:50:06 +0000845
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000846 /* actual sedding */
Eric Andersenc52a6b02001-11-10 10:49:42 +0000847 switch (sed_cmd->cmd) {
Mark Whitley0915c4b2001-06-11 23:50:06 +0000848
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000849 /* Print line number */
850 case '=':
Rob Landley53302f82004-02-18 09:54:15 +0000851 fprintf(nonstdout,"%d\n", linenum);
Glenn L McGrath2eed0e22003-09-15 06:28:45 +0000852 break;
Mark Whitley0915c4b2001-06-11 23:50:06 +0000853
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000854 /* Write the current pattern space up to the first newline */
855 case 'P':
Glenn L McGrath8d6395d2003-04-08 11:56:11 +0000856 {
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000857 char *tmp = strchr(pattern_space, '\n');
Glenn L McGrath0c518322003-03-30 03:41:53 +0000858
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000859 if (tmp) {
860 *tmp = '\0';
861 sed_puts(pattern_space,1);
862 *tmp = '\n';
863 break;
864 }
865 /* Fall Through */
866 }
867
868 /* Write the current pattern space to output */
869 case 'p':
870 sed_puts(pattern_space,no_newline);
871 break;
872 /* Delete up through first newline */
873 case 'D':
874 {
875 char *tmp = strchr(pattern_space,'\n');
876
877 if(tmp) {
878 tmp=bb_xstrdup(tmp+1);
879 free(pattern_space);
880 pattern_space=tmp;
881 goto restart;
Glenn L McGrath0c518322003-03-30 03:41:53 +0000882 }
Glenn L McGrath8d6395d2003-04-08 11:56:11 +0000883 }
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000884 /* discard this line. */
885 case 'd':
886 goto discard_line;
Mark Whitley0915c4b2001-06-11 23:50:06 +0000887
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000888 /* Substitute with regex */
889 case 's':
890 if(do_subst_command(sed_cmd, &pattern_space)) {
891 substituted|=1;
Mark Whitley0915c4b2001-06-11 23:50:06 +0000892
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000893 /* handle p option */
894 if(sed_cmd->sub_p)
895 sed_puts(pattern_space,no_newline);
896 /* handle w option */
897 if(sed_cmd->file)
898 sed_cmd->no_newline=puts_maybe_newline(pattern_space, sed_cmd->file, sed_cmd->no_newline, no_newline);
Mark Whitley0915c4b2001-06-11 23:50:06 +0000899
Glenn L McGrathd7fe39b2003-04-09 15:52:32 +0000900 }
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000901 break;
902
903 /* Append line to linked list to be printed later */
904 case 'a':
905 {
906 append(sed_cmd->string);
907 break;
Glenn L McGrathd87a7ac2003-04-09 15:26:14 +0000908 }
Glenn L McGrathd7fe39b2003-04-09 15:52:32 +0000909
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000910 /* Insert text before this line */
911 case 'i':
912 sed_puts(sed_cmd->string,1);
Glenn L McGrath2570b432003-09-16 05:25:43 +0000913 break;
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000914
915 /* Cut and paste text (replace) */
916 case 'c':
917 /* Only triggers on last line of a matching range. */
Rob Landleyce4f0e92004-10-30 06:54:19 +0000918 if (!sed_cmd->in_match) sed_puts(sed_cmd->string,0);
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000919 goto discard_line;
920
921 /* Read file, append contents to output */
922 case 'r':
Glenn L McGrathf4523562003-09-14 06:01:14 +0000923 {
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000924 FILE *outfile;
925
926 outfile = fopen(sed_cmd->string, "r");
927 if (outfile) {
928 char *line;
929
930 while ((line = bb_get_chomped_line_from_file(outfile))
931 != NULL)
932 append(line);
933 bb_xprint_and_close_file(outfile);
934 }
935
936 break;
937 }
938
939 /* Write pattern space to file. */
940 case 'w':
941 sed_cmd->no_newline=puts_maybe_newline(pattern_space,sed_cmd->file, sed_cmd->no_newline,no_newline);
942 break;
943
944 /* Read next line from input */
945 case 'n':
946 if (!be_quiet)
947 sed_puts(pattern_space,no_newline);
948 if (next_line) {
949 free(pattern_space);
950 pattern_space = next_line;
951 no_newline=next_no_newline;
Rob Landleydcc28662004-11-25 07:21:47 +0000952 next_line = get_next_line(&next_no_newline);
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000953 linenum++;
954 break;
955 }
956 /* fall through */
957
958 /* Quit. End of script, end of input. */
959 case 'q':
960 /* Exit the outer while loop */
961 free(next_line);
962 next_line = NULL;
963 goto discard_commands;
964
965 /* Append the next line to the current line */
966 case 'N':
967 {
968 /* If no next line, jump to end of script and exit. */
969 if (next_line == NULL) {
970 /* Jump to end of script and exit */
971 free(next_line);
972 next_line = NULL;
973 goto discard_line;
974 /* append next_line, read new next_line. */
Glenn L McGrathf4523562003-09-14 06:01:14 +0000975 } else {
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000976 int len=strlen(pattern_space);
977
978 pattern_space = realloc(pattern_space, len + strlen(next_line) + 2);
979 pattern_space[len]='\n';
980 strcpy(pattern_space+len+1, next_line);
981 no_newline=next_no_newline;
Rob Landleydcc28662004-11-25 07:21:47 +0000982 next_line = get_next_line(&next_no_newline);
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000983 linenum++;
Glenn L McGrathf4523562003-09-14 06:01:14 +0000984 }
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000985 break;
Glenn L McGrath8d6395d2003-04-08 11:56:11 +0000986 }
Glenn L McGrath8d6395d2003-04-08 11:56:11 +0000987
Rob Landley93850a52005-05-18 06:34:37 +0000988 /* Test/branch if substitution occurred */
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000989 case 't':
Rob Landley93850a52005-05-18 06:34:37 +0000990 if(!substituted) break;
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000991 substituted=0;
Rob Landley93850a52005-05-18 06:34:37 +0000992 /* Fall through */
993 /* Test/branch if substitution didn't occur */
994 case 'T':
995 if (substituted) break;
996 /* Fall through */
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000997 /* Branch to label */
998 case 'b':
999 if (!sed_cmd->string) goto discard_commands;
1000 else sed_cmd = branch_to(sed_cmd->string);
1001 break;
1002 /* Transliterate characters */
1003 case 'y':
1004 {
1005 int i;
Glenn L McGrath8d6395d2003-04-08 11:56:11 +00001006
Glenn L McGrathaa5a6022003-10-01 03:06:16 +00001007 for (i = 0; pattern_space[i]; i++) {
1008 int j;
1009
1010 for (j = 0; sed_cmd->string[j]; j += 2) {
1011 if (pattern_space[i] == sed_cmd->string[j]) {
1012 pattern_space[i] = sed_cmd->string[j + 1];
Rob Landleybabd3fb2005-09-02 00:10:06 +00001013 break;
Glenn L McGrathaa5a6022003-10-01 03:06:16 +00001014 }
Glenn L McGrathf01b46d2003-03-30 08:02:18 +00001015 }
1016 }
Glenn L McGrath294d1132003-09-14 16:28:08 +00001017
Glenn L McGrathaa5a6022003-10-01 03:06:16 +00001018 break;
Glenn L McGrath91e19782003-04-26 07:40:07 +00001019 }
Glenn L McGrathaa5a6022003-10-01 03:06:16 +00001020 case 'g': /* Replace pattern space with hold space */
1021 free(pattern_space);
Rob Landleyce4f0e92004-10-30 06:54:19 +00001022 pattern_space = strdup(hold_space ? hold_space : "");
Glenn L McGrathaa5a6022003-10-01 03:06:16 +00001023 break;
1024 case 'G': /* Append newline and hold space to pattern space */
1025 {
1026 int pattern_space_size = 2;
1027 int hold_space_size = 0;
1028
1029 if (pattern_space)
1030 pattern_space_size += strlen(pattern_space);
1031 if (hold_space) hold_space_size = strlen(hold_space);
1032 pattern_space = xrealloc(pattern_space, pattern_space_size + hold_space_size);
1033 if (pattern_space_size == 2) pattern_space[0]=0;
Glenn L McGrath977451e2003-09-15 12:07:48 +00001034 strcat(pattern_space, "\n");
Glenn L McGrathaa5a6022003-10-01 03:06:16 +00001035 if (hold_space) strcat(pattern_space, hold_space);
1036 no_newline=0;
Glenn L McGrath8417c8c2003-09-14 15:24:18 +00001037
Glenn L McGrathaa5a6022003-10-01 03:06:16 +00001038 break;
Glenn L McGrath91e19782003-04-26 07:40:07 +00001039 }
Glenn L McGrathaa5a6022003-10-01 03:06:16 +00001040 case 'h': /* Replace hold space with pattern space */
1041 free(hold_space);
1042 hold_space = strdup(pattern_space);
1043 break;
1044 case 'H': /* Append newline and pattern space to hold space */
1045 {
1046 int hold_space_size = 2;
1047 int pattern_space_size = 0;
Glenn L McGrath8417c8c2003-09-14 15:24:18 +00001048
Glenn L McGrathaa5a6022003-10-01 03:06:16 +00001049 if (hold_space) hold_space_size += strlen(hold_space);
1050 if (pattern_space)
1051 pattern_space_size = strlen(pattern_space);
1052 hold_space = xrealloc(hold_space,
1053 hold_space_size + pattern_space_size);
1054
1055 if (hold_space_size == 2) hold_space[0]=0;
Glenn L McGrath8417c8c2003-09-14 15:24:18 +00001056 strcat(hold_space, "\n");
Glenn L McGrathaa5a6022003-10-01 03:06:16 +00001057 if (pattern_space) strcat(hold_space, pattern_space);
1058
1059 break;
Glenn L McGrath4dc1d252003-09-14 01:25:31 +00001060 }
Glenn L McGrathaa5a6022003-10-01 03:06:16 +00001061 case 'x': /* Exchange hold and pattern space */
1062 {
1063 char *tmp = pattern_space;
1064 pattern_space = hold_space;
1065 no_newline=0;
1066 hold_space = tmp;
1067 break;
Glenn L McGrath8417c8c2003-09-14 15:24:18 +00001068 }
Mark Whitley0915c4b2001-06-11 23:50:06 +00001069 }
Robert Griebl47abc492002-06-11 23:43:27 +00001070 }
Erik Andersene49d5ec2000-02-08 19:58:47 +00001071 }
Erik Andersen1266a131999-12-29 22:19:46 +00001072
Glenn L McGrathaa5a6022003-10-01 03:06:16 +00001073 /*
1074 * exit point from sedding...
1075 */
1076discard_commands:
1077 /* we will print the line unless we were told to be quiet ('-n')
1078 or if the line was suppressed (ala 'd'elete) */
1079 if (!be_quiet) sed_puts(pattern_space,no_newline);
1080
1081 /* Delete and such jump here. */
1082discard_line:
1083 flush_append();
Glenn L McGrathc6adada2003-04-07 12:24:44 +00001084 free(pattern_space);
Glenn L McGrathaa5a6022003-10-01 03:06:16 +00001085 }
Erik Andersen1266a131999-12-29 22:19:46 +00001086}
1087
Glenn L McGrath42c25732003-10-04 05:27:56 +00001088/* It is possible to have a command line argument with embedded
1089 newlines. This counts as multiple command lines. */
1090
1091static void add_cmd_block(char *cmdstr)
1092{
1093 int go=1;
1094 char *temp=bb_xstrdup(cmdstr),*temp2=temp;
1095
1096 while(go) {
1097 int len=strcspn(temp2,"\n");
1098 if(!temp2[len]) go=0;
1099 else temp2[len]=0;
1100 add_cmd(temp2);
1101 temp2+=len+1;
1102 }
1103 free(temp);
1104}
1105
Erik Andersen1266a131999-12-29 22:19:46 +00001106extern int sed_main(int argc, char **argv)
Eric Andersen6b6b3f61999-10-28 16:06:25 +00001107{
Rob Landleyce4f0e92004-10-30 06:54:19 +00001108 int status = EXIT_SUCCESS, opt, getpat = 1;
Eric Andersen6b6b3f61999-10-28 16:06:25 +00001109
Eric Andersenbdfd0d72001-10-24 05:00:29 +00001110#ifdef CONFIG_FEATURE_CLEAN_UP
Mark Whitley858c1ad2000-07-11 21:38:47 +00001111 /* destroy command strings on exit */
Glenn L McGrathaa5a6022003-10-01 03:06:16 +00001112 if (atexit(free_and_close_stuff) == -1)
Manuel Novoa III cad53642003-03-19 09:13:01 +00001113 bb_perror_msg_and_die("atexit");
Mark Whitleyc41e8c82000-07-12 23:35:21 +00001114#endif
Mark Whitley858c1ad2000-07-11 21:38:47 +00001115
Rob Landleyfae1dc82005-11-20 07:44:35 +00001116 /* Lie to autoconf when it starts asking stupid questions. */
Eric Andersenc06f5682004-02-04 10:57:46 +00001117 if(argc==2 && !strcmp(argv[1],"--version")) {
1118 printf("This is not GNU sed version 4.0\n");
1119 exit(0);
1120 }
Eric Andersenc06f5682004-02-04 10:57:46 +00001121
Mark Whitley6315ce62000-07-10 22:55:51 +00001122 /* do normal option parsing */
Eric Andersen98555482004-05-26 10:03:33 +00001123 while ((opt = getopt(argc, argv, "irne:f:")) > 0) {
Mark Whitley6315ce62000-07-10 22:55:51 +00001124 switch (opt) {
Rob Landley53302f82004-02-18 09:54:15 +00001125 case 'i':
1126 in_place++;
1127 atexit(cleanup_outname);
1128 break;
Eric Andersen98555482004-05-26 10:03:33 +00001129 case 'r':
1130 regex_type|=REG_EXTENDED;
1131 break;
Glenn L McGrath8d6395d2003-04-08 11:56:11 +00001132 case 'n':
1133 be_quiet++;
1134 break;
Glenn L McGrathaa5a6022003-10-01 03:06:16 +00001135 case 'e':
Glenn L McGrath42c25732003-10-04 05:27:56 +00001136 add_cmd_block(optarg);
Eric Andersenfaa7d862004-04-21 00:56:22 +00001137 getpat=0;
Glenn L McGrath8d6395d2003-04-08 11:56:11 +00001138 break;
Glenn L McGrath8d6395d2003-04-08 11:56:11 +00001139 case 'f':
Glenn L McGrathaa5a6022003-10-01 03:06:16 +00001140 {
1141 FILE *cmdfile;
1142 char *line;
1143
1144 cmdfile = bb_xfopen(optarg, "r");
1145
Rob Landleyfae1dc82005-11-20 07:44:35 +00001146 while ((line = bb_get_chomped_line_from_file(cmdfile)) != NULL) {
Glenn L McGrathaa5a6022003-10-01 03:06:16 +00001147 add_cmd(line);
Eric Andersenfaa7d862004-04-21 00:56:22 +00001148 getpat=0;
Glenn L McGrathaa5a6022003-10-01 03:06:16 +00001149 free(line);
1150 }
1151 bb_xprint_and_close_file(cmdfile);
1152
Glenn L McGrath8d6395d2003-04-08 11:56:11 +00001153 break;
Glenn L McGrathaa5a6022003-10-01 03:06:16 +00001154 }
Glenn L McGrath8d6395d2003-04-08 11:56:11 +00001155 default:
1156 bb_show_usage();
Erik Andersene49d5ec2000-02-08 19:58:47 +00001157 }
Eric Andersen6b6b3f61999-10-28 16:06:25 +00001158 }
Mark Whitley6315ce62000-07-10 22:55:51 +00001159
Rob Landleydcc28662004-11-25 07:21:47 +00001160 /* if we didn't get a pattern from -e or -f, use argv[optind] */
Eric Andersenfaa7d862004-04-21 00:56:22 +00001161 if(getpat) {
Mark Whitley6315ce62000-07-10 22:55:51 +00001162 if (argv[optind] == NULL)
Manuel Novoa III cad53642003-03-19 09:13:01 +00001163 bb_show_usage();
Glenn L McGrath8aac05b2003-09-14 04:06:12 +00001164 else
Glenn L McGrath42c25732003-10-04 05:27:56 +00001165 add_cmd_block(argv[optind++]);
Mark Whitley6315ce62000-07-10 22:55:51 +00001166 }
Glenn L McGrath42c25732003-10-04 05:27:56 +00001167 /* Flush any unfinished commands. */
1168 add_cmd("");
Mark Whitley6315ce62000-07-10 22:55:51 +00001169
Rob Landley53302f82004-02-18 09:54:15 +00001170 /* By default, we write to stdout */
1171 nonstdout=stdout;
1172
Mark Whitley6315ce62000-07-10 22:55:51 +00001173 /* argv[(optind)..(argc-1)] should be names of file to process. If no
1174 * files were specified or '-' was specified, take input from stdin.
1175 * Otherwise, we process all the files specified. */
Glenn L McGrath8aac05b2003-09-14 04:06:12 +00001176 if (argv[optind] == NULL) {
Rob Landley5797c7f2005-05-18 05:56:16 +00001177 if(in_place) bb_error_msg_and_die("Filename required for -i");
Rob Landleydcc28662004-11-25 07:21:47 +00001178 add_input_file(stdin);
1179 process_files();
Glenn L McGrath8d6395d2003-04-08 11:56:11 +00001180 } else {
Mark Whitley6315ce62000-07-10 22:55:51 +00001181 int i;
1182 FILE *file;
Glenn L McGrath8d6395d2003-04-08 11:56:11 +00001183
Mark Whitley6315ce62000-07-10 22:55:51 +00001184 for (i = optind; i < argc; i++) {
Rob Landley53302f82004-02-18 09:54:15 +00001185 if(!strcmp(argv[i], "-") && !in_place) {
Rob Landleydcc28662004-11-25 07:21:47 +00001186 add_input_file(stdin);
1187 process_files();
Glenn L McGrath8aac05b2003-09-14 04:06:12 +00001188 } else {
1189 file = bb_wfopen(argv[i], "r");
1190 if (file) {
Rob Landley53302f82004-02-18 09:54:15 +00001191 if(in_place) {
1192 struct stat statbuf;
Rob Landley5797c7f2005-05-18 05:56:16 +00001193 int nonstdoutfd;
Tim Rikerc1ef7bd2006-01-25 00:08:53 +00001194
Rob Landley53302f82004-02-18 09:54:15 +00001195 outname=bb_xstrndup(argv[i],strlen(argv[i])+6);
1196 strcat(outname,"XXXXXX");
Rob Landley5797c7f2005-05-18 05:56:16 +00001197 if(-1==(nonstdoutfd=mkstemp(outname)))
1198 bb_error_msg_and_die("no temp file");
1199 nonstdout=fdopen(nonstdoutfd,"w");
Rob Landley53302f82004-02-18 09:54:15 +00001200 /* Set permissions of output file */
1201 fstat(fileno(file),&statbuf);
Rob Landley5797c7f2005-05-18 05:56:16 +00001202 fchmod(nonstdoutfd,statbuf.st_mode);
Rob Landleydcc28662004-11-25 07:21:47 +00001203 add_input_file(file);
1204 process_files();
Rob Landley53302f82004-02-18 09:54:15 +00001205 fclose(nonstdout);
1206 nonstdout=stdout;
1207 unlink(argv[i]);
1208 rename(outname,argv[i]);
1209 free(outname);
1210 outname=0;
Rob Landleydcc28662004-11-25 07:21:47 +00001211 } else add_input_file(file);
Glenn L McGrath8aac05b2003-09-14 04:06:12 +00001212 } else {
1213 status = EXIT_FAILURE;
1214 }
1215 }
Mark Whitley6315ce62000-07-10 22:55:51 +00001216 }
Rob Landleydcc28662004-11-25 07:21:47 +00001217 if(input_file_count>current_input_file) process_files();
Mark Whitley6315ce62000-07-10 22:55:51 +00001218 }
Glenn L McGrath8d6395d2003-04-08 11:56:11 +00001219
Matt Kraaia5f09c62001-11-12 16:44:55 +00001220 return status;
Eric Andersen6b6b3f61999-10-28 16:06:25 +00001221}