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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
Denis Vlasenko0beaff82007-09-21 13:16:32 +00008 * Copyright (C) 2003 by Glenn McGrath
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 Landley2b26fd52006-02-24 02:30:39 +000011 * MAINTAINER: Rob Landley <rob@landley.net>
Bernhard Reutner-Fischerb7f39732006-03-01 20:14:16 +000012 *
Rob Landleye9a7a622006-09-22 02:52:41 +000013 * Licensed under GPL version 2, see file LICENSE in this tarball for details.
Eric Andersen6b6b3f61999-10-28 16:06:25 +000014 */
15
Glenn L McGrathaa5a6022003-10-01 03:06:16 +000016/* Code overview.
17
18 Files are laid out to avoid unnecessary function declarations. So for
19 example, every function add_cmd calls occurs before add_cmd in this file.
20
21 add_cmd() is called on each line of sed command text (from a file or from
22 the command line). It calls get_address() and parse_cmd_args(). The
23 resulting sed_cmd_t structures are appended to a linked list
Denis Vlasenko17a15262007-03-26 20:48:46 +000024 (G.sed_cmd_head/G.sed_cmd_tail).
Glenn L McGrathaa5a6022003-10-01 03:06:16 +000025
Denis Vlasenkodefc1ea2008-06-27 02:52:20 +000026 add_input_file() adds a FILE* to the list of input files. We need to
Rob Landleyfae1dc82005-11-20 07:44:35 +000027 know all input sources ahead of time to find the last line for the $ match.
Rob Landleydcc28662004-11-25 07:21:47 +000028
29 process_files() does actual sedding, reading data lines from each input FILE *
Glenn L McGrathaa5a6022003-10-01 03:06:16 +000030 (which could be stdin) and applying the sed command list (sed_cmd_head) to
31 each of the resulting lines.
32
33 sed_main() is where external code calls into this, with a command line.
34*/
35
36
Mark Whitley6315ce62000-07-10 22:55:51 +000037/*
38 Supported features and commands in this version of sed:
39
40 - comments ('#')
Mark Whitley94074a92000-07-14 00:00:15 +000041 - address matching: num|/matchstr/[,num|/matchstr/|$]command
42 - commands: (p)rint, (d)elete, (s)ubstitue (with g & I flags)
43 - edit commands: (a)ppend, (i)nsert, (c)hange
Mark Whitley1f3b9f22001-05-11 22:27:13 +000044 - file commands: (r)ead
Rob Landleyc63fe912005-10-30 10:08:13 +000045 - backreferences in substitution expressions (\0, \1, \2...\9)
Glenn L McGrathf50ce312003-03-09 15:12:24 +000046 - grouped commands: {cmd1;cmd2}
Glenn L McGrathbd9b32b2003-04-09 01:43:54 +000047 - transliteration (y/source-chars/dest-chars/)
48 - pattern space hold space storing / swapping (g, h, x)
Rob Landley93850a52005-05-18 06:34:37 +000049 - labels / branching (: label, b, t, T)
Glenn L McGrathf50ce312003-03-09 15:12:24 +000050
Mark Whitley6315ce62000-07-10 22:55:51 +000051 (Note: Specifying an address (range) to match is *optional*; commands
52 default to the whole pattern space if no specific address match was
53 requested.)
54
Glenn L McGrath2570b432003-09-16 05:25:43 +000055 Todo:
Glenn L McGrath2570b432003-09-16 05:25:43 +000056 - Create a wrapper around regex to make libc's regex conform with sed
Glenn L McGrathbd9b32b2003-04-09 01:43:54 +000057
Glenn L McGrathd5eadea2003-03-09 02:39:29 +000058 Reference http://www.opengroup.org/onlinepubs/007904975/utilities/sed.html
Mark Whitley6315ce62000-07-10 22:55:51 +000059*/
60
Denis Vlasenkob6adbf12007-05-26 19:00:18 +000061#include "libbb.h"
"Vladimir N. Oleynik"23f62fc2005-09-14 16:59:11 +000062#include "xregex.h"
Mark Whitley6315ce62000-07-10 22:55:51 +000063
Denys Vlasenko2e284a42010-08-01 04:14:46 +020064enum {
65 OPT_in_place = 1 << 0,
66};
67
Rob Landleye3f5a3f2006-05-09 03:53:55 +000068/* Each sed command turns into one of these structures. */
Glenn L McGrathe7a8bc92003-03-09 10:23:57 +000069typedef struct sed_cmd_s {
Denis Vlasenkod18a3a22006-10-25 12:46:03 +000070 /* Ordered by alignment requirements: currently 36 bytes on x86 */
Denis Vlasenko34c4e5f2007-01-30 22:25:16 +000071 struct sed_cmd_s *next; /* Next command (linked list, NULL terminated) */
Mark Whitley2dc192f2000-11-03 19:47:00 +000072
Denis Vlasenkod18a3a22006-10-25 12:46:03 +000073 /* address storage */
74 regex_t *beg_match; /* sed -e '/match/cmd' */
75 regex_t *end_match; /* sed -e '/match/,/end_match/cmd' */
76 regex_t *sub_match; /* For 's/sub_match/string/' */
77 int beg_line; /* 'sed 1p' 0 == apply commands to all lines */
78 int end_line; /* 'sed 1,3p' 0 == one line only. -1 = last line ($) */
Bernhard Reutner-Fischerb7f39732006-03-01 20:14:16 +000079
Denis Vlasenkofe7a9f12007-01-29 14:31:47 +000080 FILE *sw_file; /* File (sw) command writes to, -1 for none. */
Denis Vlasenkod18a3a22006-10-25 12:46:03 +000081 char *string; /* Data string for (saicytb) commands. */
Glenn L McGrathfc4cb4d2003-04-12 16:10:42 +000082
Denis Vlasenko284d0fa2008-02-16 13:18:17 +000083 unsigned which_match; /* (s) Which match to replace (0 for all) */
Glenn L McGrathfc4cb4d2003-04-12 16:10:42 +000084
Denis Vlasenkod18a3a22006-10-25 12:46:03 +000085 /* Bitfields (gcc won't group them if we don't) */
Denis Vlasenko34c4e5f2007-01-30 22:25:16 +000086 unsigned invert:1; /* the '!' after the address */
87 unsigned in_match:1; /* Next line also included in match? */
88 unsigned sub_p:1; /* (s) print option */
Denis Vlasenko1375bc72006-12-02 20:12:12 +000089
Denis Vlasenko34c4e5f2007-01-30 22:25:16 +000090 char sw_last_char; /* Last line written by (sw) had no '\n' */
Glenn L McGrathc18ce372003-09-13 06:57:39 +000091
Denis Vlasenkod18a3a22006-10-25 12:46:03 +000092 /* GENERAL FIELDS */
93 char cmd; /* The command char: abcdDgGhHilnNpPqrstwxy:={} */
Glenn L McGrathe7a8bc92003-03-09 10:23:57 +000094} sed_cmd_t;
Mark Whitley6315ce62000-07-10 22:55:51 +000095
Denis Vlasenko6ca409e2007-08-12 20:58:27 +000096static const char semicolon_whitespace[] ALIGN1 = "; \n\r\t\v";
Glenn L McGrathaa5a6022003-10-01 03:06:16 +000097
Denis Vlasenko17a15262007-03-26 20:48:46 +000098struct globals {
Rob Landleye3f5a3f2006-05-09 03:53:55 +000099 /* options */
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +0000100 int be_quiet, regex_type;
Rob Landleye3f5a3f2006-05-09 03:53:55 +0000101 FILE *nonstdout;
102 char *outname, *hold_space;
Glenn L McGrathbd9b32b2003-04-09 01:43:54 +0000103
Rob Landleye3f5a3f2006-05-09 03:53:55 +0000104 /* List of input files */
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +0000105 int input_file_count, current_input_file;
Rob Landleye3f5a3f2006-05-09 03:53:55 +0000106 FILE **input_file_list;
Eric Andersen6b6b3f61999-10-28 16:06:25 +0000107
Rob Landleye3f5a3f2006-05-09 03:53:55 +0000108 regmatch_t regmatch[10];
109 regex_t *previous_regex_ptr;
Denis Vlasenko9213a9e2006-09-17 16:28:10 +0000110
Rob Landleye3f5a3f2006-05-09 03:53:55 +0000111 /* linked list of sed commands */
112 sed_cmd_t sed_cmd_head, *sed_cmd_tail;
113
114 /* Linked list of append lines */
115 llist_t *append_head;
116
117 char *add_cmd_line;
118
119 struct pipeline {
120 char *buf; /* Space to hold string */
121 int idx; /* Space used */
122 int len; /* Space allocated */
123 } pipeline;
Denys Vlasenko98a4c7c2010-02-04 15:00:15 +0100124} FIX_ALIASING;
Denis Vlasenko17a15262007-03-26 20:48:46 +0000125#define G (*(struct globals*)&bb_common_bufsiz1)
Denys Vlasenkobf5f99f2010-06-04 01:29:52 +0200126struct BUG_G_too_big {
127 char BUG_G_too_big[sizeof(G) <= COMMON_BUFSIZE ? 1 : -1];
128};
Denis Vlasenko74324c82007-06-04 10:16:52 +0000129#define INIT_G() do { \
Denis Vlasenko74324c82007-06-04 10:16:52 +0000130 G.sed_cmd_tail = &G.sed_cmd_head; \
131} while (0)
132
Glenn L McGrathbd9b32b2003-04-09 01:43:54 +0000133
Bernhard Reutner-Fischerb7f39732006-03-01 20:14:16 +0000134#if ENABLE_FEATURE_CLEAN_UP
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +0000135static void sed_free_and_close_stuff(void)
Mark Whitley6315ce62000-07-10 22:55:51 +0000136{
Denis Vlasenko17a15262007-03-26 20:48:46 +0000137 sed_cmd_t *sed_cmd = G.sed_cmd_head.next;
Mark Whitley6315ce62000-07-10 22:55:51 +0000138
Denis Vlasenko17a15262007-03-26 20:48:46 +0000139 llist_free(G.append_head, free);
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000140
Glenn L McGrath56c633c2003-03-28 04:23:23 +0000141 while (sed_cmd) {
Glenn L McGrathbd9b32b2003-04-09 01:43:54 +0000142 sed_cmd_t *sed_cmd_next = sed_cmd->next;
Mark Whitley6315ce62000-07-10 22:55:51 +0000143
Denis Vlasenkofe7a9f12007-01-29 14:31:47 +0000144 if (sed_cmd->sw_file)
145 xprint_and_close_file(sed_cmd->sw_file);
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000146
Glenn L McGrath56c633c2003-03-28 04:23:23 +0000147 if (sed_cmd->beg_match) {
148 regfree(sed_cmd->beg_match);
149 free(sed_cmd->beg_match);
Erik Andersene49d5ec2000-02-08 19:58:47 +0000150 }
Glenn L McGrath56c633c2003-03-28 04:23:23 +0000151 if (sed_cmd->end_match) {
152 regfree(sed_cmd->end_match);
153 free(sed_cmd->end_match);
Mark Whitley6315ce62000-07-10 22:55:51 +0000154 }
Glenn L McGrath56c633c2003-03-28 04:23:23 +0000155 if (sed_cmd->sub_match) {
156 regfree(sed_cmd->sub_match);
157 free(sed_cmd->sub_match);
Mark Whitley6315ce62000-07-10 22:55:51 +0000158 }
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000159 free(sed_cmd->string);
Glenn L McGrath56c633c2003-03-28 04:23:23 +0000160 free(sed_cmd);
161 sed_cmd = sed_cmd_next;
Mark Whitley6315ce62000-07-10 22:55:51 +0000162 }
Rob Landleyce4f0e92004-10-30 06:54:19 +0000163
Denis Vlasenko60818682007-09-28 22:07:23 +0000164 free(G.hold_space);
Rob Landleydcc28662004-11-25 07:21:47 +0000165
Denis Vlasenko17a15262007-03-26 20:48:46 +0000166 while (G.current_input_file < G.input_file_count)
167 fclose(G.input_file_list[G.current_input_file++]);
Mark Whitley6315ce62000-07-10 22:55:51 +0000168}
Denis Vlasenko666da5e2006-12-26 18:17:42 +0000169#else
170void sed_free_and_close_stuff(void);
Mark Whitleyc41e8c82000-07-12 23:35:21 +0000171#endif
Mark Whitley6315ce62000-07-10 22:55:51 +0000172
Rob Landley53302f82004-02-18 09:54:15 +0000173/* If something bad happens during -i operation, delete temp file */
174
175static void cleanup_outname(void)
176{
Denis Vlasenko17a15262007-03-26 20:48:46 +0000177 if (G.outname) unlink(G.outname);
Rob Landley53302f82004-02-18 09:54:15 +0000178}
179
Denis Vlasenko40276642007-11-13 16:48:10 +0000180/* strcpy, replacing "\from" with 'to'. If to is NUL, replacing "\any" with 'any' */
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000181
Denis Vlasenkob6aae0f2007-01-29 22:51:25 +0000182static void parse_escapes(char *dest, const char *string, int len, char from, char to)
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000183{
Denis Vlasenko80778502006-10-25 12:46:46 +0000184 int i = 0;
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000185
Denis Vlasenko80778502006-10-25 12:46:46 +0000186 while (i < len) {
187 if (string[i] == '\\') {
188 if (!to || string[i+1] == from) {
Denis Vlasenko4ebaf102007-01-19 21:33:19 +0000189 *dest++ = to ? to : string[i+1];
Denis Vlasenko80778502006-10-25 12:46:46 +0000190 i += 2;
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000191 continue;
Denis Vlasenko4ebaf102007-01-19 21:33:19 +0000192 }
193 *dest++ = string[i++];
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000194 }
Denis Vlasenko40276642007-11-13 16:48:10 +0000195 /* TODO: is it safe wrt a string with trailing '\\' ? */
Denis Vlasenko4ebaf102007-01-19 21:33:19 +0000196 *dest++ = string[i++];
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000197 }
Denis Vlasenko40276642007-11-13 16:48:10 +0000198 *dest = '\0';
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000199}
200
Denis Vlasenkob6aae0f2007-01-29 22:51:25 +0000201static char *copy_parsing_escapes(const char *string, int len)
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000202{
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +0000203 char *dest = xmalloc(len + 1);
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000204
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +0000205 parse_escapes(dest, string, len, 'n', '\n');
Denis Vlasenko40276642007-11-13 16:48:10 +0000206 /* GNU sed also recognizes \t */
207 parse_escapes(dest, dest, strlen(dest), 't', '\t');
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000208 return dest;
209}
210
211
Mark Whitley6315ce62000-07-10 22:55:51 +0000212/*
Eric Andersen28b3c532001-01-02 11:01:31 +0000213 * index_of_next_unescaped_regexp_delim - walks left to right through a string
214 * beginning at a specified index and returns the index of the next regular
Denis Vlasenko40276642007-11-13 16:48:10 +0000215 * expression delimiter (typically a forward slash ('/')) not preceded by
Rob Landley4795e4e2006-07-26 17:25:08 +0000216 * a backslash ('\'). A negative delimiter disables square bracket checking.
Mark Whitley6315ce62000-07-10 22:55:51 +0000217 */
Denis Vlasenkob6aae0f2007-01-29 22:51:25 +0000218static int index_of_next_unescaped_regexp_delim(int delimiter, const char *str)
Mark Whitley6315ce62000-07-10 22:55:51 +0000219{
Matt Kraaia0065d52001-08-24 14:45:50 +0000220 int bracket = -1;
221 int escaped = 0;
Glenn L McGrathf01b46d2003-03-30 08:02:18 +0000222 int idx = 0;
Eric Andersenc52a6b02001-11-10 10:49:42 +0000223 char ch;
Matt Kraaia0065d52001-08-24 14:45:50 +0000224
Rob Landley4795e4e2006-07-26 17:25:08 +0000225 if (delimiter < 0) {
226 bracket--;
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +0000227 delimiter = -delimiter;
Rob Landley4795e4e2006-07-26 17:25:08 +0000228 }
229
Glenn L McGrath8d6395d2003-04-08 11:56:11 +0000230 for (; (ch = str[idx]); idx++) {
Rob Landley4795e4e2006-07-26 17:25:08 +0000231 if (bracket >= 0) {
Glenn L McGrathd4185b02003-04-11 17:10:23 +0000232 if (ch == ']' && !(bracket == idx - 1 || (bracket == idx - 2
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000233 && str[idx - 1] == '^')))
Matt Kraaia0065d52001-08-24 14:45:50 +0000234 bracket = -1;
235 } else if (escaped)
236 escaped = 0;
Eric Andersenc52a6b02001-11-10 10:49:42 +0000237 else if (ch == '\\')
Matt Kraaia0065d52001-08-24 14:45:50 +0000238 escaped = 1;
Rob Landley4795e4e2006-07-26 17:25:08 +0000239 else if (bracket == -1 && ch == '[')
Matt Kraaia0065d52001-08-24 14:45:50 +0000240 bracket = idx;
Glenn L McGrath1fb44672003-03-09 08:44:49 +0000241 else if (ch == delimiter)
Mark Whitley97562bd2000-07-17 20:06:42 +0000242 return idx;
243 }
Mark Whitley6315ce62000-07-10 22:55:51 +0000244
Mark Whitley97562bd2000-07-17 20:06:42 +0000245 /* if we make it to here, we've hit the end of the string */
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +0000246 bb_error_msg_and_die("unmatched '%c'", delimiter);
Mark Whitley6315ce62000-07-10 22:55:51 +0000247}
248
Glenn L McGrath8aac05b2003-09-14 04:06:12 +0000249/*
250 * Returns the index of the third delimiter
251 */
Denis Vlasenko9356b502007-01-29 23:44:38 +0000252static int parse_regex_delim(const char *cmdstr, char **match, char **replace)
Glenn L McGrathf01b46d2003-03-30 08:02:18 +0000253{
Denis Vlasenko9356b502007-01-29 23:44:38 +0000254 const char *cmdstr_ptr = cmdstr;
Glenn L McGrathf01b46d2003-03-30 08:02:18 +0000255 char delimiter;
256 int idx = 0;
257
Glenn L McGrath8aac05b2003-09-14 04:06:12 +0000258 /* verify that the 's' or 'y' is followed by something. That something
Glenn L McGrathf01b46d2003-03-30 08:02:18 +0000259 * (typically a 'slash') is now our regexp delimiter... */
Rob Landley4795e4e2006-07-26 17:25:08 +0000260 if (*cmdstr == '\0')
261 bb_error_msg_and_die("bad format in substitution expression");
Denis Vlasenko80778502006-10-25 12:46:46 +0000262 delimiter = *cmdstr_ptr++;
Glenn L McGrathf01b46d2003-03-30 08:02:18 +0000263
264 /* save the match string */
265 idx = index_of_next_unescaped_regexp_delim(delimiter, cmdstr_ptr);
Rob Landleyfae1dc82005-11-20 07:44:35 +0000266 *match = copy_parsing_escapes(cmdstr_ptr, idx);
Glenn L McGrathf01b46d2003-03-30 08:02:18 +0000267
268 /* save the replacement string */
269 cmdstr_ptr += idx + 1;
Rob Landley4795e4e2006-07-26 17:25:08 +0000270 idx = index_of_next_unescaped_regexp_delim(-delimiter, cmdstr_ptr);
Rob Landleyfae1dc82005-11-20 07:44:35 +0000271 *replace = copy_parsing_escapes(cmdstr_ptr, idx);
Glenn L McGrathf01b46d2003-03-30 08:02:18 +0000272
Glenn L McGrath8d6395d2003-04-08 11:56:11 +0000273 return ((cmdstr_ptr - cmdstr) + idx);
Glenn L McGrathf01b46d2003-03-30 08:02:18 +0000274}
275
Mark Whitley6315ce62000-07-10 22:55:51 +0000276/*
277 * returns the index in the string just past where the address ends.
278 */
Denis Vlasenkob6aae0f2007-01-29 22:51:25 +0000279static int get_address(const char *my_str, int *linenum, regex_t ** regex)
Mark Whitley6315ce62000-07-10 22:55:51 +0000280{
Denis Vlasenkob6aae0f2007-01-29 22:51:25 +0000281 const char *pos = my_str;
Glenn L McGrath8d6395d2003-04-08 11:56:11 +0000282
Glenn L McGrath8aac05b2003-09-14 04:06:12 +0000283 if (isdigit(*my_str)) {
Denis Vlasenkob6aae0f2007-01-29 22:51:25 +0000284 *linenum = strtol(my_str, (char**)&pos, 10);
Glenn L McGrath1fb44672003-03-09 08:44:49 +0000285 /* endstr shouldnt ever equal NULL */
Glenn L McGrath8aac05b2003-09-14 04:06:12 +0000286 } else if (*my_str == '$') {
Mark Whitley0915c4b2001-06-11 23:50:06 +0000287 *linenum = -1;
Glenn L McGrath8aac05b2003-09-14 04:06:12 +0000288 pos++;
289 } else if (*my_str == '/' || *my_str == '\\') {
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000290 int next;
Glenn L McGrathf01b46d2003-03-30 08:02:18 +0000291 char delimiter;
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000292 char *temp;
Glenn L McGrath1fb44672003-03-09 08:44:49 +0000293
Denis Vlasenko80778502006-10-25 12:46:46 +0000294 delimiter = '/';
295 if (*my_str == '\\') delimiter = *++pos;
Glenn L McGrath8aac05b2003-09-14 04:06:12 +0000296 next = index_of_next_unescaped_regexp_delim(delimiter, ++pos);
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +0000297 temp = copy_parsing_escapes(pos, next);
Denis Vlasenko80778502006-10-25 12:46:46 +0000298 *regex = xmalloc(sizeof(regex_t));
Denis Vlasenko17a15262007-03-26 20:48:46 +0000299 xregcomp(*regex, temp, G.regex_type|REG_NEWLINE);
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000300 free(temp);
301 /* Move position to next character after last delimiter */
Rob Landley4795e4e2006-07-26 17:25:08 +0000302 pos += (next+1);
Mark Whitley6315ce62000-07-10 22:55:51 +0000303 }
Glenn L McGrath8aac05b2003-09-14 04:06:12 +0000304 return pos - my_str;
Mark Whitley6315ce62000-07-10 22:55:51 +0000305}
Erik Andersene49d5ec2000-02-08 19:58:47 +0000306
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000307/* Grab a filename. Whitespace at start is skipped, then goes to EOL. */
Denis Vlasenko68404f12008-03-17 09:00:54 +0000308static int parse_file_cmd(/*sed_cmd_t *sed_cmd,*/ const char *filecmdstr, char **retval)
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000309{
Denis Vlasenko80778502006-10-25 12:46:46 +0000310 int start = 0, idx, hack = 0;
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000311
312 /* Skip whitespace, then grab filename to end of line */
Denis Vlasenko9356b502007-01-29 23:44:38 +0000313 while (isspace(filecmdstr[start]))
314 start++;
Denis Vlasenko80778502006-10-25 12:46:46 +0000315 idx = start;
Denis Vlasenko9356b502007-01-29 23:44:38 +0000316 while (filecmdstr[idx] && filecmdstr[idx] != '\n')
317 idx++;
Denis Vlasenko80778502006-10-25 12:46:46 +0000318
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000319 /* If lines glued together, put backslash back. */
Denis Vlasenko9356b502007-01-29 23:44:38 +0000320 if (filecmdstr[idx] == '\n')
321 hack = 1;
Denis Vlasenko80778502006-10-25 12:46:46 +0000322 if (idx == start)
323 bb_error_msg_and_die("empty filename");
Rob Landleyd921b2e2006-08-03 15:41:12 +0000324 *retval = xstrndup(filecmdstr+start, idx-start+hack+1);
Denis Vlasenko9356b502007-01-29 23:44:38 +0000325 if (hack)
326 (*retval)[idx] = '\\';
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000327
328 return idx;
329}
330
Denis Vlasenko9356b502007-01-29 23:44:38 +0000331static int parse_subst_cmd(sed_cmd_t *sed_cmd, const char *substr)
Mark Whitley06f35292000-07-13 19:58:04 +0000332{
Denis Vlasenko17a15262007-03-26 20:48:46 +0000333 int cflags = G.regex_type;
Mark Whitley06f35292000-07-13 19:58:04 +0000334 char *match;
Denis Vlasenkob6aae0f2007-01-29 22:51:25 +0000335 int idx;
Mark Whitley06f35292000-07-13 19:58:04 +0000336
337 /*
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000338 * A substitution command should look something like this:
339 * s/match/replace/ #gIpw
Mark Whitley0e4cec02000-08-21 21:29:20 +0000340 * || | |||
Mark Whitley06f35292000-07-13 19:58:04 +0000341 * mandatory optional
Mark Whitley06f35292000-07-13 19:58:04 +0000342 */
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000343 idx = parse_regex_delim(substr, &match, &sed_cmd->string);
Mark Whitley06f35292000-07-13 19:58:04 +0000344
Mark Whitley97562bd2000-07-17 20:06:42 +0000345 /* determine the number of back references in the match string */
346 /* Note: we compute this here rather than in the do_subst_command()
347 * function to save processor time, at the expense of a little more memory
348 * (4 bits) per sed_cmd */
Glenn L McGrath8d6395d2003-04-08 11:56:11 +0000349
Mark Whitley06f35292000-07-13 19:58:04 +0000350 /* process the flags */
Mark Whitley70705d72000-07-14 19:06:30 +0000351
Denis Vlasenko80778502006-10-25 12:46:46 +0000352 sed_cmd->which_match = 1;
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000353 while (substr[++idx]) {
354 /* Parse match number */
Denis Vlasenko80778502006-10-25 12:46:46 +0000355 if (isdigit(substr[idx])) {
356 if (match[0] != '^') {
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000357 /* Match 0 treated as all, multiple matches we take the last one. */
Denis Vlasenko9356b502007-01-29 23:44:38 +0000358 const char *pos = substr + idx;
359/* FIXME: error check? */
Denis Vlasenko284d0fa2008-02-16 13:18:17 +0000360 sed_cmd->which_match = (unsigned)strtol(substr+idx, (char**) &pos, 10);
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +0000361 idx = pos - substr;
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000362 }
363 continue;
364 }
Rob Landley40ec4ae2004-01-04 06:42:14 +0000365 /* Skip spaces */
Denys Vlasenko6935ec92009-10-22 19:42:26 +0200366 if (isspace(substr[idx]))
367 continue;
Rob Landley40ec4ae2004-01-04 06:42:14 +0000368
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000369 switch (substr[idx]) {
Denis Vlasenkod18a3a22006-10-25 12:46:03 +0000370 /* Replace all occurrences */
371 case 'g':
Denis Vlasenko284d0fa2008-02-16 13:18:17 +0000372 if (match[0] != '^')
373 sed_cmd->which_match = 0;
Denis Vlasenkod18a3a22006-10-25 12:46:03 +0000374 break;
375 /* Print pattern space */
376 case 'p':
377 sed_cmd->sub_p = 1;
378 break;
379 /* Write to file */
380 case 'w':
381 {
382 char *temp;
Denis Vlasenko68404f12008-03-17 09:00:54 +0000383 idx += parse_file_cmd(/*sed_cmd,*/ substr+idx, &temp);
Denis Vlasenkod18a3a22006-10-25 12:46:03 +0000384 break;
385 }
386 /* Ignore case (gnu exension) */
387 case 'I':
388 cflags |= REG_ICASE;
389 break;
390 /* Comment */
391 case '#':
Denys Vlasenkobf5f99f2010-06-04 01:29:52 +0200392 // while (substr[++idx]) continue;
393 idx += strlen(substr + idx); // same
Denis Vlasenkod18a3a22006-10-25 12:46:03 +0000394 /* Fall through */
395 /* End of command */
396 case ';':
397 case '}':
398 goto out;
399 default:
400 bb_error_msg_and_die("bad option in substitution expression");
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000401 }
402 }
Denys Vlasenkobf5f99f2010-06-04 01:29:52 +0200403 out:
Mark Whitley97562bd2000-07-17 20:06:42 +0000404 /* compile the match string into a regex */
Glenn L McGrathc1d95072003-04-08 06:42:45 +0000405 if (*match != '\0') {
406 /* If match is empty, we use last regex used at runtime */
Denis Vlasenkob95636c2006-12-19 23:36:04 +0000407 sed_cmd->sub_match = xmalloc(sizeof(regex_t));
Glenn L McGrathc1d95072003-04-08 06:42:45 +0000408 xregcomp(sed_cmd->sub_match, match, cflags);
409 }
Mark Whitley06f35292000-07-13 19:58:04 +0000410 free(match);
Mark Whitley70705d72000-07-14 19:06:30 +0000411
412 return idx;
Mark Whitley06f35292000-07-13 19:58:04 +0000413}
414
Glenn L McGrath2971ef12003-03-18 01:19:23 +0000415/*
416 * Process the commands arguments
417 */
Denis Vlasenko9356b502007-01-29 23:44:38 +0000418static const char *parse_cmd_args(sed_cmd_t *sed_cmd, const char *cmdstr)
Mark Whitley6315ce62000-07-10 22:55:51 +0000419{
Glenn L McGrath2f8a4012003-03-09 02:44:49 +0000420 /* handle (s)ubstitution command */
Denis Vlasenko80778502006-10-25 12:46:46 +0000421 if (sed_cmd->cmd == 's')
422 cmdstr += parse_subst_cmd(sed_cmd, cmdstr);
Glenn L McGrath2f8a4012003-03-09 02:44:49 +0000423 /* handle edit cmds: (a)ppend, (i)nsert, and (c)hange */
424 else if (strchr("aic", sed_cmd->cmd)) {
425 if ((sed_cmd->end_line || sed_cmd->end_match) && sed_cmd->cmd != 'c')
Denys Vlasenko6935ec92009-10-22 19:42:26 +0200426 bb_error_msg_and_die("only a beginning address can be specified for edit commands");
Denis Vlasenko80778502006-10-25 12:46:46 +0000427 for (;;) {
428 if (*cmdstr == '\n' || *cmdstr == '\\') {
Rob Landley25d82392004-04-01 09:23:30 +0000429 cmdstr++;
430 break;
Denys Vlasenkoc0dab372009-10-22 22:28:08 +0200431 }
432 if (!isspace(*cmdstr))
Denis Vlasenko80778502006-10-25 12:46:46 +0000433 break;
Denys Vlasenkoc0dab372009-10-22 22:28:08 +0200434 cmdstr++;
Rob Landley25d82392004-04-01 09:23:30 +0000435 }
Rob Landleyd921b2e2006-08-03 15:41:12 +0000436 sed_cmd->string = xstrdup(cmdstr);
Denis Vlasenko40276642007-11-13 16:48:10 +0000437 /* "\anychar" -> "anychar" */
438 parse_escapes(sed_cmd->string, sed_cmd->string, strlen(cmdstr), '\0', '\0');
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000439 cmdstr += strlen(cmdstr);
Glenn L McGrath2f8a4012003-03-09 02:44:49 +0000440 /* handle file cmds: (r)ead */
Denis Vlasenko80778502006-10-25 12:46:46 +0000441 } else if (strchr("rw", sed_cmd->cmd)) {
Glenn L McGrath2f8a4012003-03-09 02:44:49 +0000442 if (sed_cmd->end_line || sed_cmd->end_match)
Denis Vlasenko80778502006-10-25 12:46:46 +0000443 bb_error_msg_and_die("command only uses one address");
Denis Vlasenko68404f12008-03-17 09:00:54 +0000444 cmdstr += parse_file_cmd(/*sed_cmd,*/ cmdstr, &sed_cmd->string);
Denis Vlasenkoc562bb72007-01-29 17:08:51 +0000445 if (sed_cmd->cmd == 'w') {
Denis Vlasenko5415c852008-07-21 23:05:26 +0000446 sed_cmd->sw_file = xfopen_for_write(sed_cmd->string);
Denis Vlasenkoc562bb72007-01-29 17:08:51 +0000447 sed_cmd->sw_last_char = '\n';
448 }
Glenn L McGrath961c6c12003-03-28 04:43:39 +0000449 /* handle branch commands */
Rob Landley93850a52005-05-18 06:34:37 +0000450 } else if (strchr(":btT", sed_cmd->cmd)) {
Glenn L McGrath961c6c12003-03-28 04:43:39 +0000451 int length;
452
Denis Vlasenkod18a3a22006-10-25 12:46:03 +0000453 cmdstr = skip_whitespace(cmdstr);
Glenn L McGrathf4523562003-09-14 06:01:14 +0000454 length = strcspn(cmdstr, semicolon_whitespace);
455 if (length) {
Rob Landleyd921b2e2006-08-03 15:41:12 +0000456 sed_cmd->string = xstrndup(cmdstr, length);
Glenn L McGrathf4523562003-09-14 06:01:14 +0000457 cmdstr += length;
458 }
Glenn L McGrath961c6c12003-03-28 04:43:39 +0000459 }
Glenn L McGrathf01b46d2003-03-30 08:02:18 +0000460 /* translation command */
461 else if (sed_cmd->cmd == 'y') {
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000462 char *match, *replace;
Denis Vlasenko80778502006-10-25 12:46:46 +0000463 int i = cmdstr[0];
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000464
Denis Vlasenko80778502006-10-25 12:46:46 +0000465 cmdstr += parse_regex_delim(cmdstr, &match, &replace)+1;
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000466 /* \n already parsed, but \delimiter needs unescaping. */
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +0000467 parse_escapes(match, match, strlen(match), i, i);
468 parse_escapes(replace, replace, strlen(replace), i, i);
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000469
Rob Landley9ffd4232006-05-21 18:30:35 +0000470 sed_cmd->string = xzalloc((strlen(match) + 1) * 2);
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000471 for (i = 0; match[i] && replace[i]; i++) {
Denis Vlasenko80778502006-10-25 12:46:46 +0000472 sed_cmd->string[i*2] = match[i];
473 sed_cmd->string[i*2+1] = replace[i];
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000474 }
475 free(match);
476 free(replace);
Glenn L McGrathf01b46d2003-03-30 08:02:18 +0000477 }
Glenn L McGrath2971ef12003-03-18 01:19:23 +0000478 /* if it wasnt a single-letter command that takes no arguments
479 * then it must be an invalid command.
480 */
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000481 else if (strchr("dDgGhHlnNpPqx={}", sed_cmd->cmd) == 0) {
Denis Vlasenko80778502006-10-25 12:46:46 +0000482 bb_error_msg_and_die("unsupported command %c", sed_cmd->cmd);
Mark Whitley1f3b9f22001-05-11 22:27:13 +0000483 }
Mark Whitley70705d72000-07-14 19:06:30 +0000484
485 /* give back whatever's left over */
Denis Vlasenko80778502006-10-25 12:46:46 +0000486 return cmdstr;
Eric Andersen50d63601999-11-09 01:47:36 +0000487}
Eric Andersen6b6b3f61999-10-28 16:06:25 +0000488
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000489
490/* Parse address+command sets, skipping comment lines. */
491
Denis Vlasenkob6aae0f2007-01-29 22:51:25 +0000492static void add_cmd(const char *cmdstr)
Erik Andersen1266a131999-12-29 22:19:46 +0000493{
Glenn L McGrath8aac05b2003-09-14 04:06:12 +0000494 sed_cmd_t *sed_cmd;
Denys Vlasenkoa2215b92010-05-12 01:49:04 +0200495 unsigned len, n;
Glenn L McGrath8aac05b2003-09-14 04:06:12 +0000496
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000497 /* Append this line to any unfinished line from last time. */
Denis Vlasenko17a15262007-03-26 20:48:46 +0000498 if (G.add_cmd_line) {
499 char *tp = xasprintf("%s\n%s", G.add_cmd_line, cmdstr);
500 free(G.add_cmd_line);
Denis Vlasenko945bd3d2007-04-12 21:20:25 +0000501 cmdstr = G.add_cmd_line = tp;
Rob Landley12d87552006-06-05 17:32:44 +0000502 }
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000503
Denys Vlasenkoa2215b92010-05-12 01:49:04 +0200504 /* If this line ends with unescaped backslash, request next line. */
505 n = len = strlen(cmdstr);
506 while (n && cmdstr[n-1] == '\\')
507 n--;
508 if ((len - n) & 1) { /* if odd number of trailing backslashes */
Denis Vlasenko17a15262007-03-26 20:48:46 +0000509 if (!G.add_cmd_line)
510 G.add_cmd_line = xstrdup(cmdstr);
Denys Vlasenkoa2215b92010-05-12 01:49:04 +0200511 G.add_cmd_line[len-1] = '\0';
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000512 return;
Glenn L McGrathf50ce312003-03-09 15:12:24 +0000513 }
Mark Whitley6315ce62000-07-10 22:55:51 +0000514
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000515 /* Loop parsing all commands in this line. */
Denis Vlasenko80778502006-10-25 12:46:46 +0000516 while (*cmdstr) {
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000517 /* Skip leading whitespace and semicolons */
518 cmdstr += strspn(cmdstr, semicolon_whitespace);
519
520 /* If no more commands, exit. */
Denis Vlasenko80778502006-10-25 12:46:46 +0000521 if (!*cmdstr) break;
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000522
523 /* if this is a comment, jump past it and keep going */
524 if (*cmdstr == '#') {
525 /* "#n" is the same as using -n on the command line */
Denis Vlasenko80778502006-10-25 12:46:46 +0000526 if (cmdstr[1] == 'n')
Denis Vlasenko17a15262007-03-26 20:48:46 +0000527 G.be_quiet++;
Denis Vlasenko80778502006-10-25 12:46:46 +0000528 cmdstr = strpbrk(cmdstr, "\n\r");
529 if (!cmdstr) break;
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000530 continue;
Glenn L McGrathc1d95072003-04-08 06:42:45 +0000531 }
Glenn L McGrath8d6395d2003-04-08 11:56:11 +0000532
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000533 /* parse the command
534 * format is: [addr][,addr][!]cmd
535 * |----||-----||-|
536 * part1 part2 part3
Glenn L McGrathf50ce312003-03-09 15:12:24 +0000537 */
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000538
Rob Landley9ffd4232006-05-21 18:30:35 +0000539 sed_cmd = xzalloc(sizeof(sed_cmd_t));
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000540
541 /* first part (if present) is an address: either a '$', a number or a /regex/ */
542 cmdstr += get_address(cmdstr, &sed_cmd->beg_line, &sed_cmd->beg_match);
543
544 /* second part (if present) will begin with a comma */
545 if (*cmdstr == ',') {
546 int idx;
547
Glenn L McGrathf50ce312003-03-09 15:12:24 +0000548 cmdstr++;
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000549 idx = get_address(cmdstr, &sed_cmd->end_line, &sed_cmd->end_match);
Denis Vlasenko80778502006-10-25 12:46:46 +0000550 if (!idx)
551 bb_error_msg_and_die("no address after comma");
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000552 cmdstr += idx;
Glenn L McGrathf50ce312003-03-09 15:12:24 +0000553 }
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000554
555 /* skip whitespace before the command */
Denis Vlasenkod18a3a22006-10-25 12:46:03 +0000556 cmdstr = skip_whitespace(cmdstr);
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000557
558 /* Check for inversion flag */
559 if (*cmdstr == '!') {
560 sed_cmd->invert = 1;
561 cmdstr++;
562
563 /* skip whitespace before the command */
Denis Vlasenkod18a3a22006-10-25 12:46:03 +0000564 cmdstr = skip_whitespace(cmdstr);
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000565 }
566
567 /* last part (mandatory) will be a command */
Denis Vlasenko80778502006-10-25 12:46:46 +0000568 if (!*cmdstr)
569 bb_error_msg_and_die("missing command");
Denys Vlasenkoa2215b92010-05-12 01:49:04 +0200570 sed_cmd->cmd = *cmdstr++;
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000571 cmdstr = parse_cmd_args(sed_cmd, cmdstr);
572
573 /* Add the command to the command array */
Denis Vlasenko17a15262007-03-26 20:48:46 +0000574 G.sed_cmd_tail->next = sed_cmd;
575 G.sed_cmd_tail = G.sed_cmd_tail->next;
Glenn L McGrathf50ce312003-03-09 15:12:24 +0000576 }
577
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000578 /* If we glued multiple lines together, free the memory. */
Denis Vlasenko17a15262007-03-26 20:48:46 +0000579 free(G.add_cmd_line);
580 G.add_cmd_line = NULL;
Mark Whitley6315ce62000-07-10 22:55:51 +0000581}
582
Rob Landleydcc28662004-11-25 07:21:47 +0000583/* Append to a string, reallocating memory as necessary. */
584
Glenn L McGrath8d6395d2003-04-08 11:56:11 +0000585#define PIPE_GROW 64
Eric Andersenc52a6b02001-11-10 10:49:42 +0000586
Eric Andersen14f5c8d2005-04-16 19:39:00 +0000587static void pipe_putc(char c)
Eric Andersenc52a6b02001-11-10 10:49:42 +0000588{
Denis Vlasenko17a15262007-03-26 20:48:46 +0000589 if (G.pipeline.idx == G.pipeline.len) {
590 G.pipeline.buf = xrealloc(G.pipeline.buf,
591 G.pipeline.len + PIPE_GROW);
592 G.pipeline.len += PIPE_GROW;
Eric Andersenc52a6b02001-11-10 10:49:42 +0000593 }
Denis Vlasenko17a15262007-03-26 20:48:46 +0000594 G.pipeline.buf[G.pipeline.idx++] = c;
Eric Andersenc52a6b02001-11-10 10:49:42 +0000595}
596
Rob Landley4795e4e2006-07-26 17:25:08 +0000597static void do_subst_w_backrefs(char *line, char *replace)
Mark Whitley97562bd2000-07-17 20:06:42 +0000598{
Denys Vlasenkof210cff2009-08-17 01:35:04 +0200599 int i, j;
Mark Whitley97562bd2000-07-17 20:06:42 +0000600
601 /* go through the replacement string */
602 for (i = 0; replace[i]; i++) {
603 /* if we find a backreference (\1, \2, etc.) print the backref'ed * text */
Denis Vlasenkoef44d9d2007-01-17 23:16:16 +0000604 if (replace[i] == '\\') {
605 unsigned backref = replace[++i] - '0';
606 if (backref <= 9) {
Denis Vlasenko17a15262007-03-26 20:48:46 +0000607 /* print out the text held in G.regmatch[backref] */
608 if (G.regmatch[backref].rm_so != -1) {
609 j = G.regmatch[backref].rm_so;
610 while (j < G.regmatch[backref].rm_eo)
Denis Vlasenkoef44d9d2007-01-17 23:16:16 +0000611 pipe_putc(line[j++]);
612 }
613 continue;
Denis Vlasenko80778502006-10-25 12:46:46 +0000614 }
Denis Vlasenkoef44d9d2007-01-17 23:16:16 +0000615 /* I _think_ it is impossible to get '\' to be
616 * the last char in replace string. Thus we dont check
617 * for replace[i] == NUL. (counterexample anyone?) */
618 /* if we find a backslash escaped character, print the character */
619 pipe_putc(replace[i]);
620 continue;
Mark Whitley97562bd2000-07-17 20:06:42 +0000621 }
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000622 /* if we find an unescaped '&' print out the whole matched text. */
Denis Vlasenkoef44d9d2007-01-17 23:16:16 +0000623 if (replace[i] == '&') {
Denis Vlasenko17a15262007-03-26 20:48:46 +0000624 j = G.regmatch[0].rm_so;
625 while (j < G.regmatch[0].rm_eo)
Denis Vlasenko80778502006-10-25 12:46:46 +0000626 pipe_putc(line[j++]);
Denis Vlasenkoef44d9d2007-01-17 23:16:16 +0000627 continue;
Denis Vlasenko80778502006-10-25 12:46:46 +0000628 }
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000629 /* Otherwise just output the character. */
Denis Vlasenkoef44d9d2007-01-17 23:16:16 +0000630 pipe_putc(replace[i]);
Mark Whitley97562bd2000-07-17 20:06:42 +0000631 }
632}
633
Denys Vlasenkof210cff2009-08-17 01:35:04 +0200634static int do_subst_command(sed_cmd_t *sed_cmd, char **line_p)
Mark Whitley4f7fe772000-07-13 20:01:58 +0000635{
Denys Vlasenkof210cff2009-08-17 01:35:04 +0200636 char *line = *line_p;
Mark Whitley4f7fe772000-07-13 20:01:58 +0000637 int altered = 0;
Denis Vlasenko77ad97f2008-05-13 02:27:31 +0000638 unsigned match_count = 0;
Glenn L McGrathc1d95072003-04-08 06:42:45 +0000639 regex_t *current_regex;
640
Denys Vlasenkof210cff2009-08-17 01:35:04 +0200641 current_regex = sed_cmd->sub_match;
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000642 /* Handle empty regex. */
Denys Vlasenkof210cff2009-08-17 01:35:04 +0200643 if (!current_regex) {
Denis Vlasenko17a15262007-03-26 20:48:46 +0000644 current_regex = G.previous_regex_ptr;
Denis Vlasenko80778502006-10-25 12:46:46 +0000645 if (!current_regex)
Denis Vlasenkod3d004d2006-10-27 09:02:31 +0000646 bb_error_msg_and_die("no previous regexp");
Denys Vlasenkof210cff2009-08-17 01:35:04 +0200647 }
648 G.previous_regex_ptr = current_regex;
Mark Whitley4f7fe772000-07-13 20:01:58 +0000649
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000650 /* Find the first match */
Denys Vlasenkof210cff2009-08-17 01:35:04 +0200651 if (REG_NOMATCH == regexec(current_regex, line, 10, G.regmatch, 0))
Mark Whitley2dc192f2000-11-03 19:47:00 +0000652 return 0;
653
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000654 /* Initialize temporary output buffer. */
Denis Vlasenko17a15262007-03-26 20:48:46 +0000655 G.pipeline.buf = xmalloc(PIPE_GROW);
656 G.pipeline.len = PIPE_GROW;
657 G.pipeline.idx = 0;
Mark Whitley2dc192f2000-11-03 19:47:00 +0000658
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000659 /* Now loop through, substituting for matches */
660 do {
Mark Whitley4f7fe772000-07-13 20:01:58 +0000661 int i;
Mark Whitley4f7fe772000-07-13 20:01:58 +0000662
Eric Andersenc06f5682004-02-04 10:57:46 +0000663 /* Work around bug in glibc regexec, demonstrated by:
664 echo " a.b" | busybox sed 's [^ .]* x g'
665 The match_count check is so not to break
666 echo "hi" | busybox sed 's/^/!/g' */
Denis Vlasenko17a15262007-03-26 20:48:46 +0000667 if (!G.regmatch[0].rm_so && !G.regmatch[0].rm_eo && match_count) {
Denys Vlasenkof210cff2009-08-17 01:35:04 +0200668 pipe_putc(*line++);
Eric Andersenc06f5682004-02-04 10:57:46 +0000669 continue;
670 }
671
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000672 match_count++;
673
674 /* If we aren't interested in this match, output old line to
675 end of match and continue */
Denis Vlasenko77ad97f2008-05-13 02:27:31 +0000676 if (sed_cmd->which_match
677 && (sed_cmd->which_match != match_count)
678 ) {
Denis Vlasenko17a15262007-03-26 20:48:46 +0000679 for (i = 0; i < G.regmatch[0].rm_eo; i++)
Denys Vlasenkof210cff2009-08-17 01:35:04 +0200680 pipe_putc(*line++);
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000681 continue;
682 }
683
Mark Whitley2dc192f2000-11-03 19:47:00 +0000684 /* print everything before the match */
Denis Vlasenko17a15262007-03-26 20:48:46 +0000685 for (i = 0; i < G.regmatch[0].rm_so; i++)
Denys Vlasenkof210cff2009-08-17 01:35:04 +0200686 pipe_putc(line[i]);
Mark Whitley97562bd2000-07-17 20:06:42 +0000687
Mark Whitley2dc192f2000-11-03 19:47:00 +0000688 /* then print the substitution string */
Denys Vlasenkof210cff2009-08-17 01:35:04 +0200689 do_subst_w_backrefs(line, sed_cmd->string);
Mark Whitley97562bd2000-07-17 20:06:42 +0000690
Mark Whitley2dc192f2000-11-03 19:47:00 +0000691 /* advance past the match */
Denys Vlasenkof210cff2009-08-17 01:35:04 +0200692 line += G.regmatch[0].rm_eo;
Mark Whitley2dc192f2000-11-03 19:47:00 +0000693 /* flag that something has changed */
694 altered++;
Mark Whitley97562bd2000-07-17 20:06:42 +0000695
Mark Whitley2dc192f2000-11-03 19:47:00 +0000696 /* if we're not doing this globally, get out now */
Denis Vlasenko284d0fa2008-02-16 13:18:17 +0000697 if (sed_cmd->which_match)
698 break;
Denys Vlasenkof210cff2009-08-17 01:35:04 +0200699
Denys Vlasenkof210cff2009-08-17 01:35:04 +0200700//maybe (G.regmatch[0].rm_eo ? REG_NOTBOL : 0) instead of unconditional REG_NOTBOL?
Denys Vlasenko11c82382009-09-22 03:02:21 +0200701 } while (*line && regexec(current_regex, line, 10, G.regmatch, REG_NOTBOL) != REG_NOMATCH);
Mark Whitley2dc192f2000-11-03 19:47:00 +0000702
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000703 /* Copy rest of string into output pipeline */
Denys Vlasenkof210cff2009-08-17 01:35:04 +0200704 while (1) {
705 char c = *line++;
706 pipe_putc(c);
707 if (c == '\0')
708 break;
709 }
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000710
Denys Vlasenkof210cff2009-08-17 01:35:04 +0200711 free(*line_p);
712 *line_p = G.pipeline.buf;
Mark Whitley4f7fe772000-07-13 20:01:58 +0000713 return altered;
714}
Mark Whitley6315ce62000-07-10 22:55:51 +0000715
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000716/* Set command pointer to point to this label. (Does not handle null label.) */
Rob Landley4795e4e2006-07-26 17:25:08 +0000717static sed_cmd_t *branch_to(char *label)
Glenn L McGrath961c6c12003-03-28 04:43:39 +0000718{
719 sed_cmd_t *sed_cmd;
Glenn L McGrathd4185b02003-04-11 17:10:23 +0000720
Denis Vlasenko17a15262007-03-26 20:48:46 +0000721 for (sed_cmd = G.sed_cmd_head.next; sed_cmd; sed_cmd = sed_cmd->next) {
Denis Vlasenko80778502006-10-25 12:46:46 +0000722 if (sed_cmd->cmd == ':' && sed_cmd->string && !strcmp(sed_cmd->string, label)) {
723 return sed_cmd;
Glenn L McGrath961c6c12003-03-28 04:43:39 +0000724 }
725 }
Denis Vlasenko80778502006-10-25 12:46:46 +0000726 bb_error_msg_and_die("can't find label for jump to '%s'", label);
Glenn L McGrath961c6c12003-03-28 04:43:39 +0000727}
Mark Whitley6315ce62000-07-10 22:55:51 +0000728
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000729static void append(char *s)
730{
Denis Vlasenko17a15262007-03-26 20:48:46 +0000731 llist_add_to_end(&G.append_head, xstrdup(s));
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000732}
733
734static void flush_append(void)
735{
Rob Landley0b656282006-05-08 22:17:23 +0000736 char *data;
737
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000738 /* Output appended lines. */
Denis Vlasenko17a15262007-03-26 20:48:46 +0000739 while ((data = (char *)llist_pop(&G.append_head))) {
740 fprintf(G.nonstdout, "%s\n", data);
Rob Landley0b656282006-05-08 22:17:23 +0000741 free(data);
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000742 }
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000743}
744
Eric Andersen14f5c8d2005-04-16 19:39:00 +0000745static void add_input_file(FILE *file)
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000746{
Denis Vlasenkodeeed592008-07-08 05:14:36 +0000747 G.input_file_list = xrealloc_vector(G.input_file_list, 2, G.input_file_count);
Denis Vlasenko17a15262007-03-26 20:48:46 +0000748 G.input_file_list[G.input_file_count++] = file;
Rob Landleydcc28662004-11-25 07:21:47 +0000749}
750
Denis Vlasenko17a15262007-03-26 20:48:46 +0000751/* Get next line of input from G.input_file_list, flushing append buffer and
Rob Landleydcc28662004-11-25 07:21:47 +0000752 * noting if we ran out of files without a newline on the last line we read.
753 */
Denis Vlasenkofe7a9f12007-01-29 14:31:47 +0000754enum {
755 NO_EOL_CHAR = 1,
Denis Vlasenko86811802007-01-29 17:10:19 +0000756 LAST_IS_NUL = 2,
Denis Vlasenkofe7a9f12007-01-29 14:31:47 +0000757};
758static char *get_next_line(char *gets_char)
Rob Landleydcc28662004-11-25 07:21:47 +0000759{
Denis Vlasenko80778502006-10-25 12:46:46 +0000760 char *temp = NULL;
Denis Vlasenkoc562bb72007-01-29 17:08:51 +0000761 int len;
762 char gc;
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000763
764 flush_append();
Denis Vlasenkofe7a9f12007-01-29 14:31:47 +0000765
766 /* will be returned if last line in the file
767 * doesn't end with either '\n' or '\0' */
768 gc = NO_EOL_CHAR;
Denis Vlasenko17a15262007-03-26 20:48:46 +0000769 while (G.current_input_file < G.input_file_count) {
770 FILE *fp = G.input_file_list[G.current_input_file];
Denis Vlasenkoef44d9d2007-01-17 23:16:16 +0000771 /* Read line up to a newline or NUL byte, inclusive,
772 * return malloc'ed char[]. length of the chunk read
773 * is stored in len. NULL if EOF/error */
Denis Vlasenko86811802007-01-29 17:10:19 +0000774 temp = bb_get_chunk_from_file(fp, &len);
Rob Landley2b26fd52006-02-24 02:30:39 +0000775 if (temp) {
Denis Vlasenko8b22b072006-12-02 17:58:10 +0000776 /* len > 0 here, it's ok to do temp[len-1] */
777 char c = temp[len-1];
778 if (c == '\n' || c == '\0') {
779 temp[len-1] = '\0';
Denis Vlasenkoc562bb72007-01-29 17:08:51 +0000780 gc = c;
Denis Vlasenko86811802007-01-29 17:10:19 +0000781 if (c == '\0') {
782 int ch = fgetc(fp);
783 if (ch != EOF)
784 ungetc(ch, fp);
785 else
786 gc = LAST_IS_NUL;
787 }
Denis Vlasenko8b22b072006-12-02 17:58:10 +0000788 }
Denis Vlasenkoc562bb72007-01-29 17:08:51 +0000789 /* else we put NO_EOL_CHAR into *gets_char */
790 break;
791
Denis Vlasenkofe7a9f12007-01-29 14:31:47 +0000792 /* NB: I had the idea of peeking next file(s) and returning
793 * NO_EOL_CHAR only if it is the *last* non-empty
794 * input file. But there is a case where this won't work:
795 * file1: "a woo\nb woo"
796 * file2: "c no\nd no"
797 * sed -ne 's/woo/bang/p' input1 input2 => "a bang\nb bang"
798 * (note: *no* newline after "b bang"!) */
Denis Vlasenko8b22b072006-12-02 17:58:10 +0000799 }
800 /* Close this file and advance to next one */
Denis Vlasenko86811802007-01-29 17:10:19 +0000801 fclose(fp);
Denis Vlasenko17a15262007-03-26 20:48:46 +0000802 G.current_input_file++;
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000803 }
Denis Vlasenkofe7a9f12007-01-29 14:31:47 +0000804 *gets_char = gc;
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000805 return temp;
806}
807
Denis Vlasenko8b22b072006-12-02 17:58:10 +0000808/* Output line of text. */
809/* Note:
Denis Vlasenkofe7a9f12007-01-29 14:31:47 +0000810 * The tricks with NO_EOL_CHAR and last_puts_char are there to emulate gnu sed.
Denis Vlasenko1375bc72006-12-02 20:12:12 +0000811 * Without them, we had this:
Denis Vlasenko8b22b072006-12-02 17:58:10 +0000812 * echo -n thingy >z1
813 * echo -n again >z2
814 * >znull
Denis Vlasenkoef44d9d2007-01-17 23:16:16 +0000815 * sed "s/i/z/" z1 z2 znull | hexdump -vC
816 * output:
Denis Vlasenko8b22b072006-12-02 17:58:10 +0000817 * gnu sed 4.1.5:
818 * 00000000 74 68 7a 6e 67 79 0a 61 67 61 7a 6e |thzngy.agazn|
819 * bbox:
820 * 00000000 74 68 7a 6e 67 79 61 67 61 7a 6e |thzngyagazn|
Denis Vlasenko8b22b072006-12-02 17:58:10 +0000821 */
Denis Vlasenkofe7a9f12007-01-29 14:31:47 +0000822static void puts_maybe_newline(char *s, FILE *file, char *last_puts_char, char last_gets_char)
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000823{
Denis Vlasenkofe7a9f12007-01-29 14:31:47 +0000824 char lpc = *last_puts_char;
Denis Vlasenko1375bc72006-12-02 20:12:12 +0000825
Denis Vlasenko86811802007-01-29 17:10:19 +0000826 /* Need to insert a '\n' between two files because first file's
827 * last line wasn't terminated? */
Denis Vlasenkofe7a9f12007-01-29 14:31:47 +0000828 if (lpc != '\n' && lpc != '\0') {
Denis Vlasenko1375bc72006-12-02 20:12:12 +0000829 fputc('\n', file);
Denis Vlasenkofe7a9f12007-01-29 14:31:47 +0000830 lpc = '\n';
Denis Vlasenko1375bc72006-12-02 20:12:12 +0000831 }
Denis Vlasenko8b22b072006-12-02 17:58:10 +0000832 fputs(s, file);
Denis Vlasenko86811802007-01-29 17:10:19 +0000833
Denis Vlasenkofe7a9f12007-01-29 14:31:47 +0000834 /* 'x' - just something which is not '\n', '\0' or NO_EOL_CHAR */
Denis Vlasenkoef44d9d2007-01-17 23:16:16 +0000835 if (s[0])
Denis Vlasenkofe7a9f12007-01-29 14:31:47 +0000836 lpc = 'x';
Denis Vlasenko86811802007-01-29 17:10:19 +0000837
838 /* had trailing '\0' and it was last char of file? */
839 if (last_gets_char == LAST_IS_NUL) {
840 fputc('\0', file);
841 lpc = 'x'; /* */
842 } else
843 /* had trailing '\n' or '\0'? */
844 if (last_gets_char != NO_EOL_CHAR) {
Denis Vlasenkofe7a9f12007-01-29 14:31:47 +0000845 fputc(last_gets_char, file);
846 lpc = last_gets_char;
Denis Vlasenko1375bc72006-12-02 20:12:12 +0000847 }
Denis Vlasenko86811802007-01-29 17:10:19 +0000848
Denis Vlasenko80778502006-10-25 12:46:46 +0000849 if (ferror(file)) {
Denis Vlasenko40920822006-10-03 20:28:06 +0000850 xfunc_error_retval = 4; /* It's what gnu sed exits with... */
Bernhard Reutner-Fischera3d4bf32006-06-03 21:40:11 +0000851 bb_error_msg_and_die(bb_msg_write_error);
Rob Landley53302f82004-02-18 09:54:15 +0000852 }
Denis Vlasenkofe7a9f12007-01-29 14:31:47 +0000853 *last_puts_char = lpc;
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000854}
855
Denis Vlasenko17a15262007-03-26 20:48:46 +0000856#define sed_puts(s, n) (puts_maybe_newline(s, G.nonstdout, &last_puts_char, n))
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000857
Denis Vlasenko8274e062007-08-06 03:41:08 +0000858static int beg_match(sed_cmd_t *sed_cmd, const char *pattern_space)
859{
860 int retval = sed_cmd->beg_match && !regexec(sed_cmd->beg_match, pattern_space, 0, NULL, 0);
861 if (retval)
862 G.previous_regex_ptr = sed_cmd->beg_match;
863 return retval;
864}
865
Rob Landley2b26fd52006-02-24 02:30:39 +0000866/* Process all the lines in all the files */
867
Rob Landleydcc28662004-11-25 07:21:47 +0000868static void process_files(void)
Mark Whitley6315ce62000-07-10 22:55:51 +0000869{
Rob Landleyce4f0e92004-10-30 06:54:19 +0000870 char *pattern_space, *next_line;
Denis Vlasenko826c85f2007-01-28 23:26:15 +0000871 int linenum = 0;
Denis Vlasenkofe7a9f12007-01-29 14:31:47 +0000872 char last_puts_char = '\n';
873 char last_gets_char, next_gets_char;
Denis Vlasenko2ea630f2006-12-10 02:52:19 +0000874 sed_cmd_t *sed_cmd;
875 int substituted;
Mark Whitley6315ce62000-07-10 22:55:51 +0000876
Rob Landley2b26fd52006-02-24 02:30:39 +0000877 /* Prime the pump */
Denis Vlasenkofe7a9f12007-01-29 14:31:47 +0000878 next_line = get_next_line(&next_gets_char);
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000879
Denys Vlasenko8bca3e22009-06-30 19:19:37 +0200880 /* Go through every line in each file */
Denis Vlasenkof39c7c02008-02-28 17:59:01 +0000881 again:
Denis Vlasenko2ea630f2006-12-10 02:52:19 +0000882 substituted = 0;
Glenn L McGrath505bd0f2003-03-08 05:21:02 +0000883
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +0000884 /* Advance to next line. Stop if out of lines. */
885 pattern_space = next_line;
Denys Vlasenko8bca3e22009-06-30 19:19:37 +0200886 if (!pattern_space)
887 return;
Denis Vlasenkofe7a9f12007-01-29 14:31:47 +0000888 last_gets_char = next_gets_char;
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +0000889
890 /* Read one line in advance so we can act on the last line,
891 * the '$' address */
Denis Vlasenkofe7a9f12007-01-29 14:31:47 +0000892 next_line = get_next_line(&next_gets_char);
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +0000893 linenum++;
Denys Vlasenko8bca3e22009-06-30 19:19:37 +0200894
895 /* For every line, go through all the commands */
Denis Vlasenkof39c7c02008-02-28 17:59:01 +0000896 restart:
Denis Vlasenko17a15262007-03-26 20:48:46 +0000897 for (sed_cmd = G.sed_cmd_head.next; sed_cmd; sed_cmd = sed_cmd->next) {
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +0000898 int old_matched, matched;
Eric Andersen52a3c272003-12-23 08:53:51 +0000899
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +0000900 old_matched = sed_cmd->in_match;
Mark Whitley0915c4b2001-06-11 23:50:06 +0000901
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +0000902 /* Determine if this command matches this line: */
Denys Vlasenko8e96b5b2009-07-14 01:02:57 +0200903
Denys Vlasenkobf5f99f2010-06-04 01:29:52 +0200904 //bb_error_msg("match1:%d", sed_cmd->in_match);
905 //bb_error_msg("match2:%d", (!sed_cmd->beg_line && !sed_cmd->end_line
906 // && !sed_cmd->beg_match && !sed_cmd->end_match));
907 //bb_error_msg("match3:%d", (sed_cmd->beg_line > 0
908 // && (sed_cmd->end_line || sed_cmd->end_match
909 // ? (sed_cmd->beg_line <= linenum)
910 // : (sed_cmd->beg_line == linenum)
911 // )
912 // )
913 //bb_error_msg("match4:%d", (beg_match(sed_cmd, pattern_space)));
914 //bb_error_msg("match5:%d", (sed_cmd->beg_line == -1 && next_line == NULL));
915
Denys Vlasenko8e96b5b2009-07-14 01:02:57 +0200916 /* Are we continuing a previous multi-line match? */
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +0000917 sed_cmd->in_match = sed_cmd->in_match
918 /* Or is no range necessary? */
919 || (!sed_cmd->beg_line && !sed_cmd->end_line
920 && !sed_cmd->beg_match && !sed_cmd->end_match)
921 /* Or did we match the start of a numerical range? */
Denys Vlasenkobf5f99f2010-06-04 01:29:52 +0200922 || (sed_cmd->beg_line > 0
923 && (sed_cmd->end_line || sed_cmd->end_match
Denys Vlasenkoc4679242010-06-04 01:31:48 +0200924 /* note: even if end is numeric and is < linenum too,
Denys Vlasenkobf5f99f2010-06-04 01:29:52 +0200925 * GNU sed matches! We match too */
926 ? (sed_cmd->beg_line <= linenum) /* N,end */
927 : (sed_cmd->beg_line == linenum) /* N */
928 )
929 )
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +0000930 /* Or does this line match our begin address regex? */
Denis Vlasenko8274e062007-08-06 03:41:08 +0000931 || (beg_match(sed_cmd, pattern_space))
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +0000932 /* Or did we match last line of input? */
933 || (sed_cmd->beg_line == -1 && next_line == NULL);
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000934
Denys Vlasenko8e96b5b2009-07-14 01:02:57 +0200935 /* Snapshot the value */
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +0000936 matched = sed_cmd->in_match;
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000937
Denys Vlasenko8bca3e22009-06-30 19:19:37 +0200938 //bb_error_msg("cmd:'%c' matched:%d beg_line:%d end_line:%d linenum:%d",
939 //sed_cmd->cmd, matched, sed_cmd->beg_line, sed_cmd->end_line, linenum);
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000940
Denys Vlasenko8bca3e22009-06-30 19:19:37 +0200941 /* Is this line the end of the current match? */
Denys Vlasenko8e96b5b2009-07-14 01:02:57 +0200942
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +0000943 if (matched) {
Denys Vlasenko8e96b5b2009-07-14 01:02:57 +0200944 /* once matched, "n,xxx" range is dead, disabling it */
Denys Vlasenko2e284a42010-08-01 04:14:46 +0200945 if (sed_cmd->beg_line > 0
946 && !(option_mask32 & OPT_in_place) /* but not for -i */
947 ) {
Denys Vlasenko8e96b5b2009-07-14 01:02:57 +0200948 sed_cmd->beg_line = -2;
Denys Vlasenko2e284a42010-08-01 04:14:46 +0200949 }
Denys Vlasenko8e96b5b2009-07-14 01:02:57 +0200950 sed_cmd->in_match = !(
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +0000951 /* has the ending line come, or is this a single address command? */
Denys Vlasenko8e96b5b2009-07-14 01:02:57 +0200952 (sed_cmd->end_line ?
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +0000953 sed_cmd->end_line == -1 ?
954 !next_line
955 : (sed_cmd->end_line <= linenum)
956 : !sed_cmd->end_match
Denys Vlasenko8e96b5b2009-07-14 01:02:57 +0200957 )
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +0000958 /* or does this line matches our last address regex */
Denys Vlasenko8e96b5b2009-07-14 01:02:57 +0200959 || (sed_cmd->end_match && old_matched
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +0000960 && (regexec(sed_cmd->end_match,
Denys Vlasenko8e96b5b2009-07-14 01:02:57 +0200961 pattern_space, 0, NULL, 0) == 0))
962 );
Erik Andersene49d5ec2000-02-08 19:58:47 +0000963 }
Erik Andersen1266a131999-12-29 22:19:46 +0000964
Denys Vlasenko8bca3e22009-06-30 19:19:37 +0200965 /* Skip blocks of commands we didn't match */
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +0000966 if (sed_cmd->cmd == '{') {
Denis Vlasenko826c85f2007-01-28 23:26:15 +0000967 if (sed_cmd->invert ? matched : !matched) {
Denys Vlasenkof2c16ed2010-04-20 04:00:03 -0400968 unsigned nest_cnt = 0;
969 while (1) {
970 if (sed_cmd->cmd == '{')
971 nest_cnt++;
972 if (sed_cmd->cmd == '}') {
973 nest_cnt--;
974 if (nest_cnt == 0)
975 break;
976 }
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +0000977 sed_cmd = sed_cmd->next;
Denis Vlasenko826c85f2007-01-28 23:26:15 +0000978 if (!sed_cmd)
979 bb_error_msg_and_die("unterminated {");
980 }
981 }
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +0000982 continue;
983 }
Glenn L McGrathaa5a6022003-10-01 03:06:16 +0000984
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +0000985 /* Okay, so did this line match? */
Denys Vlasenko8bca3e22009-06-30 19:19:37 +0200986 if (sed_cmd->invert ? matched : !matched)
987 continue; /* no */
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +0000988
Denys Vlasenko8bca3e22009-06-30 19:19:37 +0200989 /* Update last used regex in case a blank substitute BRE is found */
990 if (sed_cmd->beg_match) {
991 G.previous_regex_ptr = sed_cmd->beg_match;
992 }
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +0000993
Denys Vlasenko8bca3e22009-06-30 19:19:37 +0200994 /* actual sedding */
995 switch (sed_cmd->cmd) {
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +0000996
Denys Vlasenko8bca3e22009-06-30 19:19:37 +0200997 /* Print line number */
998 case '=':
999 fprintf(G.nonstdout, "%d\n", linenum);
1000 break;
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +00001001
Denys Vlasenko8bca3e22009-06-30 19:19:37 +02001002 /* Write the current pattern space up to the first newline */
1003 case 'P':
1004 {
1005 char *tmp = strchr(pattern_space, '\n');
Denys Vlasenko8bca3e22009-06-30 19:19:37 +02001006 if (tmp) {
1007 *tmp = '\0';
1008 /* TODO: explain why '\n' below */
Denis Vlasenkofe7a9f12007-01-29 14:31:47 +00001009 sed_puts(pattern_space, '\n');
Denys Vlasenko8bca3e22009-06-30 19:19:37 +02001010 *tmp = '\n';
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +00001011 break;
1012 }
Denys Vlasenko8bca3e22009-06-30 19:19:37 +02001013 /* Fall Through */
1014 }
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +00001015
Denys Vlasenko8bca3e22009-06-30 19:19:37 +02001016 /* Write the current pattern space to output */
1017 case 'p':
1018 /* NB: we print this _before_ the last line
1019 * (of current file) is printed. Even if
1020 * that line is nonterminated, we print
1021 * '\n' here (gnu sed does the same) */
1022 sed_puts(pattern_space, '\n');
1023 break;
1024 /* Delete up through first newline */
1025 case 'D':
1026 {
1027 char *tmp = strchr(pattern_space, '\n');
Denys Vlasenko8bca3e22009-06-30 19:19:37 +02001028 if (tmp) {
Denys Vlasenkobf5f99f2010-06-04 01:29:52 +02001029 overlapping_strcpy(pattern_space, tmp + 1);
Denys Vlasenko8bca3e22009-06-30 19:19:37 +02001030 goto restart;
1031 }
1032 }
1033 /* discard this line. */
1034 case 'd':
1035 goto discard_line;
1036
1037 /* Substitute with regex */
1038 case 's':
1039 if (!do_subst_command(sed_cmd, &pattern_space))
1040 break;
1041 substituted |= 1;
1042
1043 /* handle p option */
1044 if (sed_cmd->sub_p)
1045 sed_puts(pattern_space, last_gets_char);
1046 /* handle w option */
1047 if (sed_cmd->sw_file)
Denis Vlasenkofe7a9f12007-01-29 14:31:47 +00001048 puts_maybe_newline(
1049 pattern_space, sed_cmd->sw_file,
1050 &sed_cmd->sw_last_char, last_gets_char);
Denys Vlasenko8bca3e22009-06-30 19:19:37 +02001051 break;
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +00001052
Denys Vlasenko8bca3e22009-06-30 19:19:37 +02001053 /* Append line to linked list to be printed later */
1054 case 'a':
1055 append(sed_cmd->string);
1056 break;
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +00001057
Denys Vlasenko8bca3e22009-06-30 19:19:37 +02001058 /* Insert text before this line */
1059 case 'i':
1060 sed_puts(sed_cmd->string, '\n');
1061 break;
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +00001062
Denys Vlasenko8bca3e22009-06-30 19:19:37 +02001063 /* Cut and paste text (replace) */
1064 case 'c':
1065 /* Only triggers on last line of a matching range. */
1066 if (!sed_cmd->in_match)
Denys Vlasenko96a18332010-04-19 22:36:07 -04001067 sed_puts(sed_cmd->string, '\n');
Denys Vlasenko8bca3e22009-06-30 19:19:37 +02001068 goto discard_line;
1069
1070 /* Read file, append contents to output */
1071 case 'r':
1072 {
1073 FILE *rfile;
Denys Vlasenko8bca3e22009-06-30 19:19:37 +02001074 rfile = fopen_for_read(sed_cmd->string);
1075 if (rfile) {
1076 char *line;
1077
1078 while ((line = xmalloc_fgetline(rfile))
1079 != NULL)
1080 append(line);
1081 xprint_and_close_file(rfile);
1082 }
1083
1084 break;
1085 }
1086
1087 /* Write pattern space to file. */
1088 case 'w':
1089 puts_maybe_newline(
1090 pattern_space, sed_cmd->sw_file,
1091 &sed_cmd->sw_last_char, last_gets_char);
1092 break;
1093
1094 /* Read next line from input */
1095 case 'n':
1096 if (!G.be_quiet)
1097 sed_puts(pattern_space, last_gets_char);
1098 if (next_line) {
1099 free(pattern_space);
1100 pattern_space = next_line;
Denis Vlasenkofe7a9f12007-01-29 14:31:47 +00001101 last_gets_char = next_gets_char;
1102 next_line = get_next_line(&next_gets_char);
Denys Vlasenko8bca3e22009-06-30 19:19:37 +02001103 substituted = 0;
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +00001104 linenum++;
1105 break;
1106 }
Denys Vlasenko8bca3e22009-06-30 19:19:37 +02001107 /* fall through */
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +00001108
Denys Vlasenko8bca3e22009-06-30 19:19:37 +02001109 /* Quit. End of script, end of input. */
1110 case 'q':
1111 /* Exit the outer while loop */
1112 free(next_line);
1113 next_line = NULL;
1114 goto discard_commands;
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +00001115
Denys Vlasenko8bca3e22009-06-30 19:19:37 +02001116 /* Append the next line to the current line */
1117 case 'N':
1118 {
1119 int len;
1120 /* If no next line, jump to end of script and exit. */
1121 if (next_line == NULL) {
Denys Vlasenko8bca3e22009-06-30 19:19:37 +02001122 free(next_line);
1123 next_line = NULL;
1124 goto discard_line;
Denys Vlasenko8bca3e22009-06-30 19:19:37 +02001125 }
Denys Vlasenkobf5f99f2010-06-04 01:29:52 +02001126 /* Append next_line, read new next_line. */
Denys Vlasenko8bca3e22009-06-30 19:19:37 +02001127 len = strlen(pattern_space);
Denys Vlasenko90377872010-01-08 09:07:50 +01001128 pattern_space = xrealloc(pattern_space, len + strlen(next_line) + 2);
Denys Vlasenko8bca3e22009-06-30 19:19:37 +02001129 pattern_space[len] = '\n';
1130 strcpy(pattern_space + len+1, next_line);
1131 last_gets_char = next_gets_char;
1132 next_line = get_next_line(&next_gets_char);
1133 linenum++;
1134 break;
1135 }
1136
1137 /* Test/branch if substitution occurred */
1138 case 't':
1139 if (!substituted) break;
1140 substituted = 0;
1141 /* Fall through */
1142 /* Test/branch if substitution didn't occur */
1143 case 'T':
1144 if (substituted) break;
1145 /* Fall through */
1146 /* Branch to label */
1147 case 'b':
1148 if (!sed_cmd->string) goto discard_commands;
1149 else sed_cmd = branch_to(sed_cmd->string);
1150 break;
1151 /* Transliterate characters */
1152 case 'y':
1153 {
1154 int i, j;
Denys Vlasenko8bca3e22009-06-30 19:19:37 +02001155 for (i = 0; pattern_space[i]; i++) {
1156 for (j = 0; sed_cmd->string[j]; j += 2) {
1157 if (pattern_space[i] == sed_cmd->string[j]) {
1158 pattern_space[i] = sed_cmd->string[j + 1];
1159 break;
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +00001160 }
1161 }
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +00001162 }
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +00001163
Denys Vlasenko8bca3e22009-06-30 19:19:37 +02001164 break;
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +00001165 }
Denys Vlasenko8bca3e22009-06-30 19:19:37 +02001166 case 'g': /* Replace pattern space with hold space */
1167 free(pattern_space);
1168 pattern_space = xstrdup(G.hold_space ? G.hold_space : "");
1169 break;
1170 case 'G': /* Append newline and hold space to pattern space */
1171 {
1172 int pattern_space_size = 2;
1173 int hold_space_size = 0;
1174
1175 if (pattern_space)
1176 pattern_space_size += strlen(pattern_space);
1177 if (G.hold_space)
1178 hold_space_size = strlen(G.hold_space);
1179 pattern_space = xrealloc(pattern_space,
1180 pattern_space_size + hold_space_size);
1181 if (pattern_space_size == 2)
1182 pattern_space[0] = 0;
1183 strcat(pattern_space, "\n");
1184 if (G.hold_space)
1185 strcat(pattern_space, G.hold_space);
1186 last_gets_char = '\n';
1187
1188 break;
1189 }
1190 case 'h': /* Replace hold space with pattern space */
1191 free(G.hold_space);
1192 G.hold_space = xstrdup(pattern_space);
1193 break;
1194 case 'H': /* Append newline and pattern space to hold space */
1195 {
1196 int hold_space_size = 2;
1197 int pattern_space_size = 0;
1198
1199 if (G.hold_space)
1200 hold_space_size += strlen(G.hold_space);
1201 if (pattern_space)
1202 pattern_space_size = strlen(pattern_space);
1203 G.hold_space = xrealloc(G.hold_space,
1204 hold_space_size + pattern_space_size);
1205
1206 if (hold_space_size == 2)
1207 *G.hold_space = 0;
1208 strcat(G.hold_space, "\n");
1209 if (pattern_space)
1210 strcat(G.hold_space, pattern_space);
1211
1212 break;
1213 }
1214 case 'x': /* Exchange hold and pattern space */
1215 {
1216 char *tmp = pattern_space;
Denys Vlasenko90a99042009-09-06 02:36:23 +02001217 pattern_space = G.hold_space ? G.hold_space : xzalloc(1);
Denys Vlasenko8bca3e22009-06-30 19:19:37 +02001218 last_gets_char = '\n';
1219 G.hold_space = tmp;
1220 break;
1221 }
1222 } /* switch */
1223 } /* for each cmd */
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +00001224
1225 /*
Denys Vlasenko8bca3e22009-06-30 19:19:37 +02001226 * Exit point from sedding...
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +00001227 */
Denis Vlasenko826c85f2007-01-28 23:26:15 +00001228 discard_commands:
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +00001229 /* we will print the line unless we were told to be quiet ('-n')
1230 or if the line was suppressed (ala 'd'elete) */
Denis Vlasenko17a15262007-03-26 20:48:46 +00001231 if (!G.be_quiet)
Denis Vlasenkofe7a9f12007-01-29 14:31:47 +00001232 sed_puts(pattern_space, last_gets_char);
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +00001233
1234 /* Delete and such jump here. */
Denis Vlasenko826c85f2007-01-28 23:26:15 +00001235 discard_line:
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +00001236 flush_append();
1237 free(pattern_space);
1238
1239 goto again;
Erik Andersen1266a131999-12-29 22:19:46 +00001240}
1241
Glenn L McGrath42c25732003-10-04 05:27:56 +00001242/* It is possible to have a command line argument with embedded
Denis Vlasenko4b0bb9e2007-03-16 23:36:58 +00001243 * newlines. This counts as multiple command lines.
1244 * However, newline can be escaped: 's/e/z\<newline>z/'
1245 * We check for this.
1246 */
Glenn L McGrath42c25732003-10-04 05:27:56 +00001247
1248static void add_cmd_block(char *cmdstr)
1249{
Denis Vlasenko4b0bb9e2007-03-16 23:36:58 +00001250 char *sv, *eol;
Glenn L McGrath42c25732003-10-04 05:27:56 +00001251
Denis Vlasenko4b0bb9e2007-03-16 23:36:58 +00001252 cmdstr = sv = xstrdup(cmdstr);
1253 do {
1254 eol = strchr(cmdstr, '\n');
1255 next:
1256 if (eol) {
1257 /* Count preceding slashes */
1258 int slashes = 0;
1259 char *sl = eol;
1260
1261 while (sl != cmdstr && *--sl == '\\')
1262 slashes++;
1263 /* Odd number of preceding slashes - newline is escaped */
1264 if (slashes & 1) {
Denis Vlasenko0f293b92008-07-22 20:16:55 +00001265 overlapping_strcpy(eol - 1, eol);
Denis Vlasenko4b0bb9e2007-03-16 23:36:58 +00001266 eol = strchr(eol, '\n');
1267 goto next;
1268 }
1269 *eol = '\0';
1270 }
1271 add_cmd(cmdstr);
1272 cmdstr = eol + 1;
1273 } while (eol);
1274 free(sv);
Glenn L McGrath42c25732003-10-04 05:27:56 +00001275}
1276
Denis Vlasenko9b49a5e2007-10-11 10:05:36 +00001277int sed_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
Denis Vlasenkoa60f84e2008-07-05 09:18:54 +00001278int sed_main(int argc UNUSED_PARAM, char **argv)
Eric Andersen6b6b3f61999-10-28 16:06:25 +00001279{
Denis Vlasenko67b23e62006-10-03 21:00:06 +00001280 unsigned opt;
Denis Vlasenkob97c9842006-10-01 21:05:12 +00001281 llist_t *opt_e, *opt_f;
1282 int status = EXIT_SUCCESS;
Eric Andersen6b6b3f61999-10-28 16:06:25 +00001283
Denis Vlasenko74324c82007-06-04 10:16:52 +00001284 INIT_G();
Rob Landleye3f5a3f2006-05-09 03:53:55 +00001285
Mark Whitley858c1ad2000-07-11 21:38:47 +00001286 /* destroy command strings on exit */
Rob Landley0b656282006-05-08 22:17:23 +00001287 if (ENABLE_FEATURE_CLEAN_UP) atexit(sed_free_and_close_stuff);
Mark Whitley858c1ad2000-07-11 21:38:47 +00001288
Rob Landleyfae1dc82005-11-20 07:44:35 +00001289 /* Lie to autoconf when it starts asking stupid questions. */
Denis Vlasenko62a90cd2008-03-17 09:07:36 +00001290 if (argv[1] && !strcmp(argv[1], "--version")) {
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +00001291 puts("This is not GNU sed version 4.0");
1292 return 0;
Eric Andersenc06f5682004-02-04 10:57:46 +00001293 }
Eric Andersenc06f5682004-02-04 10:57:46 +00001294
Mark Whitley6315ce62000-07-10 22:55:51 +00001295 /* do normal option parsing */
Denis Vlasenkob97c9842006-10-01 21:05:12 +00001296 opt_e = opt_f = NULL;
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +00001297 opt_complementary = "e::f::" /* can occur multiple times */
1298 "nn"; /* count -n */
Denys Vlasenko2e284a42010-08-01 04:14:46 +02001299 /* -i must be first, to match OPT_in_place definition */
Denis Vlasenkofe7cd642007-08-18 15:32:12 +00001300 opt = getopt32(argv, "irne:f:", &opt_e, &opt_f,
Denis Vlasenko17a15262007-03-26 20:48:46 +00001301 &G.be_quiet); /* counter for -n */
Denis Vlasenko62a90cd2008-03-17 09:07:36 +00001302 //argc -= optind;
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +00001303 argv += optind;
1304 if (opt & OPT_in_place) { // -i
Denis Vlasenko750fc6d2006-09-22 08:56:03 +00001305 atexit(cleanup_outname);
1306 }
Denis Vlasenko17a15262007-03-26 20:48:46 +00001307 if (opt & 0x2) G.regex_type |= REG_EXTENDED; // -r
1308 //if (opt & 0x4) G.be_quiet++; // -n
Denis Vlasenko945bd3d2007-04-12 21:20:25 +00001309 while (opt_e) { // -e
Denis Vlasenkod50dda82008-06-15 05:40:56 +00001310 add_cmd_block(llist_pop(&opt_e));
Denis Vlasenko750fc6d2006-09-22 08:56:03 +00001311 }
Denis Vlasenko945bd3d2007-04-12 21:20:25 +00001312 while (opt_f) { // -f
1313 char *line;
1314 FILE *cmdfile;
Denis Vlasenko5415c852008-07-21 23:05:26 +00001315 cmdfile = xfopen_for_read(llist_pop(&opt_f));
Denis Vlasenko8ee649a2008-03-26 20:04:27 +00001316 while ((line = xmalloc_fgetline(cmdfile)) != NULL) {
Denis Vlasenko945bd3d2007-04-12 21:20:25 +00001317 add_cmd(line);
1318 free(line);
1319 }
1320 fclose(cmdfile);
Eric Andersen6b6b3f61999-10-28 16:06:25 +00001321 }
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +00001322 /* if we didn't get a pattern from -e or -f, use argv[0] */
Denis Vlasenko80778502006-10-25 12:46:46 +00001323 if (!(opt & 0x18)) {
Denis Vlasenko62a90cd2008-03-17 09:07:36 +00001324 if (!*argv)
Manuel Novoa III cad53642003-03-19 09:13:01 +00001325 bb_show_usage();
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +00001326 add_cmd_block(*argv++);
Mark Whitley6315ce62000-07-10 22:55:51 +00001327 }
Glenn L McGrath42c25732003-10-04 05:27:56 +00001328 /* Flush any unfinished commands. */
1329 add_cmd("");
Mark Whitley6315ce62000-07-10 22:55:51 +00001330
Rob Landley53302f82004-02-18 09:54:15 +00001331 /* By default, we write to stdout */
Denis Vlasenko17a15262007-03-26 20:48:46 +00001332 G.nonstdout = stdout;
Rob Landley53302f82004-02-18 09:54:15 +00001333
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +00001334 /* argv[0..(argc-1)] should be names of file to process. If no
Mark Whitley6315ce62000-07-10 22:55:51 +00001335 * files were specified or '-' was specified, take input from stdin.
1336 * Otherwise, we process all the files specified. */
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +00001337 if (argv[0] == NULL) {
1338 if (opt & OPT_in_place)
Denis Vlasenko80778502006-10-25 12:46:46 +00001339 bb_error_msg_and_die(bb_msg_requires_arg, "-i");
Rob Landleydcc28662004-11-25 07:21:47 +00001340 add_input_file(stdin);
Glenn L McGrath8d6395d2003-04-08 11:56:11 +00001341 } else {
Mark Whitley6315ce62000-07-10 22:55:51 +00001342 int i;
1343 FILE *file;
Glenn L McGrath8d6395d2003-04-08 11:56:11 +00001344
Denis Vlasenko62a90cd2008-03-17 09:07:36 +00001345 for (i = 0; argv[i]; i++) {
Denis Vlasenkod18a3a22006-10-25 12:46:03 +00001346 struct stat statbuf;
1347 int nonstdoutfd;
1348
Denis Vlasenko9f739442006-12-16 23:49:13 +00001349 if (LONE_DASH(argv[i]) && !(opt & OPT_in_place)) {
Rob Landleydcc28662004-11-25 07:21:47 +00001350 add_input_file(stdin);
1351 process_files();
Denis Vlasenkod18a3a22006-10-25 12:46:03 +00001352 continue;
Glenn L McGrath8aac05b2003-09-14 04:06:12 +00001353 }
Denis Vlasenkoddec5af2006-10-26 23:25:17 +00001354 file = fopen_or_warn(argv[i], "r");
Denis Vlasenkod18a3a22006-10-25 12:46:03 +00001355 if (!file) {
1356 status = EXIT_FAILURE;
1357 continue;
1358 }
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +00001359 if (!(opt & OPT_in_place)) {
Denis Vlasenkod18a3a22006-10-25 12:46:03 +00001360 add_input_file(file);
1361 continue;
1362 }
1363
Denis Vlasenko17a15262007-03-26 20:48:46 +00001364 G.outname = xasprintf("%sXXXXXX", argv[i]);
1365 nonstdoutfd = mkstemp(G.outname);
Denis Vlasenko80778502006-10-25 12:46:46 +00001366 if (-1 == nonstdoutfd)
Denys Vlasenko6331cf02009-11-13 09:08:27 +01001367 bb_perror_msg_and_die("can't create temp file %s", G.outname);
Denys Vlasenkoa7ccdee2009-11-15 23:28:11 +01001368 G.nonstdout = xfdopen_for_write(nonstdoutfd);
Denis Vlasenkod18a3a22006-10-25 12:46:03 +00001369
Denys Vlasenko57992482009-11-13 09:09:07 +01001370 /* Set permissions/owner of output file */
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +00001371 fstat(fileno(file), &statbuf);
Denys Vlasenko3b727cc2010-06-18 02:12:56 +02001372 /* chmod'ing AFTER chown would preserve suid/sgid bits,
1373 * but GNU sed 4.2.1 does not preserve them either */
Denis Vlasenko2f8f71b2006-12-10 02:09:12 +00001374 fchmod(nonstdoutfd, statbuf.st_mode);
Denys Vlasenko57992482009-11-13 09:09:07 +01001375 fchown(nonstdoutfd, statbuf.st_uid, statbuf.st_gid);
Denis Vlasenkod18a3a22006-10-25 12:46:03 +00001376 add_input_file(file);
1377 process_files();
Denis Vlasenko17a15262007-03-26 20:48:46 +00001378 fclose(G.nonstdout);
Denis Vlasenkod18a3a22006-10-25 12:46:03 +00001379
Denis Vlasenko17a15262007-03-26 20:48:46 +00001380 G.nonstdout = stdout;
Denis Vlasenko80778502006-10-25 12:46:46 +00001381 /* unlink(argv[i]); */
Denis Vlasenkocb448fe2008-02-17 14:28:53 +00001382 xrename(G.outname, argv[i]);
Denis Vlasenko17a15262007-03-26 20:48:46 +00001383 free(G.outname);
Denis Vlasenko40276642007-11-13 16:48:10 +00001384 G.outname = NULL;
Mark Whitley6315ce62000-07-10 22:55:51 +00001385 }
Denys Vlasenkoeb08b6e2010-06-19 17:51:06 +02001386 /* Here, to handle "sed 'cmds' nonexistent_file" case we did:
1387 * if (G.current_input_file >= G.input_file_count)
1388 * return status;
1389 * but it's not needed since process_files() works correctly
1390 * in this case too. */
Mark Whitley6315ce62000-07-10 22:55:51 +00001391 }
Denys Vlasenkoeb08b6e2010-06-19 17:51:06 +02001392 process_files();
Glenn L McGrath8d6395d2003-04-08 11:56:11 +00001393
Matt Kraaia5f09c62001-11-12 16:44:55 +00001394 return status;
Eric Andersen6b6b3f61999-10-28 16:06:25 +00001395}