1 /* vi: set sw=4 ts=4: */
3 * sed.c - very minimalist version of sed
5 * Copyright (C) 1999,2000,2001 by Lineo, inc. and Mark Whitley
6 * Copyright (C) 1999,2000,2001 by Mark Whitley <markw@codepoet.org>
7 * Copyright (C) 2002 Matt Kraai
8 * Copyright (C) 2003 by Glenn McGrath <bug1@optushome.com.au>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
28 Files are laid out to avoid unnecessary function declarations. So for
29 example, every function add_cmd calls occurs before add_cmd in this file.
31 add_cmd() is called on each line of sed command text (from a file or from
32 the command line). It calls get_address() and parse_cmd_args(). The
33 resulting sed_cmd_t structures are appended to a linked list
34 (sed_cmd_head/sed_cmd_tail).
36 process_file() does actual sedding, reading data lines from an input FILE *
37 (which could be stdin) and applying the sed command list (sed_cmd_head) to
38 each of the resulting lines.
40 sed_main() is where external code calls into this, with a command line.
45 Supported features and commands in this version of sed:
48 - address matching: num|/matchstr/[,num|/matchstr/|$]command
49 - commands: (p)rint, (d)elete, (s)ubstitue (with g & I flags)
50 - edit commands: (a)ppend, (i)nsert, (c)hange
51 - file commands: (r)ead
52 - backreferences in substitution expressions (\1, \2...\9)
53 - grouped commands: {cmd1;cmd2}
54 - transliteration (y/source-chars/dest-chars/)
55 - pattern space hold space storing / swapping (g, h, x)
56 - labels / branching (: label, b, t)
58 (Note: Specifying an address (range) to match is *optional*; commands
59 default to the whole pattern space if no specific address match was
69 - Create a wrapper around regex to make libc's regex conform with sed
73 Reference http://www.opengroup.org/onlinepubs/007904975/utilities/sed.html
77 #include <unistd.h> /* for getopt() */
79 #include <string.h> /* for strdup() */
81 #include <ctype.h> /* for isspace() */
85 typedef struct sed_cmd_s {
86 /* Ordered by alignment requirements: currently 36 bytes on x86 */
89 regex_t *beg_match; /* sed -e '/match/cmd' */
90 regex_t *end_match; /* sed -e '/match/,/end_match/cmd' */
91 regex_t *sub_match; /* For 's/sub_match/string/' */
92 int beg_line; /* 'sed 1p' 0 == apply commands to all lines */
93 int end_line; /* 'sed 1,3p' 0 == one line only. -1 = last line ($) */
95 FILE *file; /* File (sr) command writes to, -1 for none. */
96 char *string; /* Data string for (saicytb) commands. */
98 unsigned short which_match; /* (s) Which match to replace (0 for all) */
100 /* Bitfields (gcc won't group them if we don't) */
101 unsigned int invert:1; /* the '!' after the address */
102 unsigned int in_match:1; /* Next line also included in match? */
103 unsigned int no_newline:1; /* Last line written by (sr) had no '\n' */
104 unsigned int sub_p:1; /* (s) print option */
108 char cmd; /* The command char: abcdDgGhHilnNpPqrstwxy:={} */
109 struct sed_cmd_s *next; /* Next command (linked list, NULL terminated) */
114 static int be_quiet = 0, in_place=0;
119 static const char bad_format_in_subst[] =
120 "bad format in substitution expression";
121 const char *const semicolon_whitespace = "; \n\r\t\v";
123 regmatch_t regmatch[10];
124 static regex_t *previous_regex_ptr = NULL;
126 /* linked list of sed commands */
127 static sed_cmd_t sed_cmd_head;
128 static sed_cmd_t *sed_cmd_tail = &sed_cmd_head;
130 /* Linked list of append lines */
133 struct append_list *next;
135 struct append_list *append_head=NULL, *append_tail=NULL;
137 #ifdef CONFIG_FEATURE_CLEAN_UP
138 static void free_and_close_stuff(void)
140 sed_cmd_t *sed_cmd = sed_cmd_head.next;
143 append_tail=append_head->next;
144 free(append_head->string);
146 append_head=append_tail;
150 sed_cmd_t *sed_cmd_next = sed_cmd->next;
153 bb_xprint_and_close_file(sed_cmd->file);
155 if (sed_cmd->beg_match) {
156 regfree(sed_cmd->beg_match);
157 free(sed_cmd->beg_match);
159 if (sed_cmd->end_match) {
160 regfree(sed_cmd->end_match);
161 free(sed_cmd->end_match);
163 if (sed_cmd->sub_match) {
164 regfree(sed_cmd->sub_match);
165 free(sed_cmd->sub_match);
167 free(sed_cmd->string);
169 sed_cmd = sed_cmd_next;
174 /* If something bad happens during -i operation, delete temp file */
176 static void cleanup_outname(void)
178 if(outname) unlink(outname);
181 /* strdup, replacing "\n" with '\n', and "\delimiter" with 'delimiter' */
183 static void parse_escapes(char *dest, const char *string, int len, char from, char to)
188 if(string[i] == '\\') {
189 if(!to || string[i+1] == from) {
190 *(dest++) = to ? to : string[i+1];
193 } else *(dest++)=string[i++];
195 *(dest++) = string[i++];
200 static char *copy_parsing_slashn(const char *string, int len)
202 char *dest=xmalloc(len+1);
204 parse_escapes(dest,string,len,'n','\n');
210 * index_of_next_unescaped_regexp_delim - walks left to right through a string
211 * beginning at a specified index and returns the index of the next regular
212 * expression delimiter (typically a forward * slash ('/')) not preceeded by
215 static int index_of_next_unescaped_regexp_delim(const char delimiter,
223 for (; (ch = str[idx]); idx++) {
225 if (ch == ']' && !(bracket == idx - 1 || (bracket == idx - 2
226 && str[idx - 1] == '^')))
234 else if (ch == delimiter)
238 /* if we make it to here, we've hit the end of the string */
243 * Returns the index of the third delimiter
245 static int parse_regex_delim(const char *cmdstr, char **match, char **replace)
247 const char *cmdstr_ptr = cmdstr;
251 /* verify that the 's' or 'y' is followed by something. That something
252 * (typically a 'slash') is now our regexp delimiter... */
253 if (*cmdstr == '\0') bb_error_msg_and_die(bad_format_in_subst);
254 delimiter = *(cmdstr_ptr++);
256 /* save the match string */
257 idx = index_of_next_unescaped_regexp_delim(delimiter, cmdstr_ptr);
259 bb_error_msg_and_die(bad_format_in_subst);
261 *match = copy_parsing_slashn(cmdstr_ptr, idx);
263 /* save the replacement string */
264 cmdstr_ptr += idx + 1;
265 idx = index_of_next_unescaped_regexp_delim(delimiter, cmdstr_ptr);
267 bb_error_msg_and_die(bad_format_in_subst);
269 *replace = copy_parsing_slashn(cmdstr_ptr, idx);
271 return ((cmdstr_ptr - cmdstr) + idx);
275 * returns the index in the string just past where the address ends.
277 static int get_address(char *my_str, int *linenum, regex_t ** regex)
281 if (isdigit(*my_str)) {
282 *linenum = strtol(my_str, &pos, 10);
283 /* endstr shouldnt ever equal NULL */
284 } else if (*my_str == '$') {
287 } else if (*my_str == '/' || *my_str == '\\') {
292 if (*my_str == '\\') delimiter = *(++pos);
293 else delimiter = '/';
294 next = index_of_next_unescaped_regexp_delim(delimiter, ++pos);
296 bb_error_msg_and_die("unterminated match expression");
298 temp=copy_parsing_slashn(pos,next);
299 *regex = (regex_t *) xmalloc(sizeof(regex_t));
300 xregcomp(*regex, temp, REG_NEWLINE);
302 /* Move position to next character after last delimiter */
308 /* Grab a filename. Whitespace at start is skipped, then goes to EOL. */
309 static int parse_file_cmd(sed_cmd_t * sed_cmd, const char *filecmdstr, char **retval)
311 int start = 0, idx, hack=0;
313 /* Skip whitespace, then grab filename to end of line */
314 while (isspace(filecmdstr[start])) start++;
316 while(filecmdstr[idx] && filecmdstr[idx]!='\n') idx++;
317 /* If lines glued together, put backslash back. */
318 if(filecmdstr[idx]=='\n') hack=1;
319 if(idx==start) bb_error_msg_and_die("Empty filename");
320 *retval = bb_xstrndup(filecmdstr+start, idx-start+hack+1);
321 if(hack) *(idx+*retval)='\\';
326 static int parse_subst_cmd(sed_cmd_t * const sed_cmd, char *substr)
333 * A substitution command should look something like this:
334 * s/match/replace/ #gIpw
338 idx = parse_regex_delim(substr, &match, &sed_cmd->string);
340 /* determine the number of back references in the match string */
341 /* Note: we compute this here rather than in the do_subst_command()
342 * function to save processor time, at the expense of a little more memory
343 * (4 bits) per sed_cmd */
345 /* process the flags */
347 sed_cmd->which_match=1;
348 while (substr[++idx]) {
349 /* Parse match number */
350 if(isdigit(substr[idx])) {
352 /* Match 0 treated as all, multiple matches we take the last one. */
353 char *pos=substr+idx;
354 sed_cmd->which_match=(unsigned short)strtol(substr+idx,&pos,10);
360 if(isspace(substr[idx])) continue;
362 switch (substr[idx]) {
363 /* Replace all occurrences */
365 if (match[0] != '^') sed_cmd->which_match = 0;
367 /* Print pattern space */
374 idx+=parse_file_cmd(sed_cmd,substr+idx,&temp);
378 /* Ignore case (gnu exension) */
386 bb_error_msg_and_die("bad option in substitution expression");
390 /* compile the match string into a regex */
391 if (*match != '\0') {
392 /* If match is empty, we use last regex used at runtime */
393 sed_cmd->sub_match = (regex_t *) xmalloc(sizeof(regex_t));
394 xregcomp(sed_cmd->sub_match, match, cflags);
402 * Process the commands arguments
404 static char *parse_cmd_args(sed_cmd_t *sed_cmd, char *cmdstr)
406 /* handle (s)ubstitution command */
407 if (sed_cmd->cmd == 's') cmdstr += parse_subst_cmd(sed_cmd, cmdstr);
408 /* handle edit cmds: (a)ppend, (i)nsert, and (c)hange */
409 else if (strchr("aic", sed_cmd->cmd)) {
410 if ((sed_cmd->end_line || sed_cmd->end_match) && sed_cmd->cmd != 'c')
412 ("only a beginning address can be specified for edit commands");
413 while(isspace(*cmdstr)) cmdstr++;
414 sed_cmd->string = bb_xstrdup(cmdstr);
415 parse_escapes(sed_cmd->string,sed_cmd->string,strlen(cmdstr),0,0);
416 cmdstr += strlen(cmdstr);
417 /* handle file cmds: (r)ead */
418 } else if(strchr("rw", sed_cmd->cmd)) {
419 if (sed_cmd->end_line || sed_cmd->end_match)
420 bb_error_msg_and_die("Command only uses one address");
421 cmdstr += parse_file_cmd(sed_cmd, cmdstr, &sed_cmd->string);
422 if(sed_cmd->cmd=='w')
423 sed_cmd->file=bb_xfopen(sed_cmd->string,"w");
424 /* handle branch commands */
425 } else if (strchr(":bt", sed_cmd->cmd)) {
428 while(isspace(*cmdstr)) cmdstr++;
429 length = strcspn(cmdstr, semicolon_whitespace);
431 sed_cmd->string = strndup(cmdstr, length);
435 /* translation command */
436 else if (sed_cmd->cmd == 'y') {
437 char *match, *replace;
440 cmdstr+=parse_regex_delim(cmdstr, &match, &replace)+1;
441 /* \n already parsed, but \delimiter needs unescaping. */
442 parse_escapes(match,match,strlen(match),i,i);
443 parse_escapes(replace,replace,strlen(replace),i,i);
445 sed_cmd->string = xcalloc(1, (strlen(match) + 1) * 2);
446 for (i = 0; match[i] && replace[i]; i++) {
447 sed_cmd->string[i * 2] = match[i];
448 sed_cmd->string[(i * 2) + 1] = replace[i];
453 /* if it wasnt a single-letter command that takes no arguments
454 * then it must be an invalid command.
456 else if (strchr("dDgGhHlnNpPqx={}", sed_cmd->cmd) == 0) {
457 bb_error_msg_and_die("Unsupported command %c", sed_cmd->cmd);
460 /* give back whatever's left over */
465 /* Parse address+command sets, skipping comment lines. */
467 void add_cmd(char *cmdstr)
469 static char *add_cmd_line=NULL;
473 /* Append this line to any unfinished line from last time. */
475 int lastlen=strlen(add_cmd_line);
476 char *tmp=xmalloc(lastlen+strlen(cmdstr)+2);
478 memcpy(tmp,add_cmd_line,lastlen);
480 strcpy(tmp+lastlen+1,cmdstr);
482 cmdstr=add_cmd_line=tmp;
483 } else add_cmd_line=NULL;
485 /* If this line ends with backslash, request next line. */
487 if(temp && cmdstr[temp-1]=='\\') {
488 if(!add_cmd_line) add_cmd_line=strdup(cmdstr);
489 add_cmd_line[temp-1]=0;
493 /* Loop parsing all commands in this line. */
495 /* Skip leading whitespace and semicolons */
496 cmdstr += strspn(cmdstr, semicolon_whitespace);
498 /* If no more commands, exit. */
501 /* if this is a comment, jump past it and keep going */
502 if (*cmdstr == '#') {
503 /* "#n" is the same as using -n on the command line */
504 if (cmdstr[1] == 'n') be_quiet++;
505 if(!(cmdstr=strpbrk(cmdstr, "\n\r"))) break;
510 * format is: [addr][,addr][!]cmd
515 sed_cmd = xcalloc(1, sizeof(sed_cmd_t));
517 /* first part (if present) is an address: either a '$', a number or a /regex/ */
518 cmdstr += get_address(cmdstr, &sed_cmd->beg_line, &sed_cmd->beg_match);
520 /* second part (if present) will begin with a comma */
521 if (*cmdstr == ',') {
525 idx = get_address(cmdstr, &sed_cmd->end_line, &sed_cmd->end_match);
526 if (!idx) bb_error_msg_and_die("get_address: no address found in string\n");
530 /* skip whitespace before the command */
531 while (isspace(*cmdstr)) cmdstr++;
533 /* Check for inversion flag */
534 if (*cmdstr == '!') {
538 /* skip whitespace before the command */
539 while (isspace(*cmdstr)) cmdstr++;
542 /* last part (mandatory) will be a command */
543 if (!*cmdstr) bb_error_msg_and_die("missing command");
544 sed_cmd->cmd = *(cmdstr++);
545 cmdstr = parse_cmd_args(sed_cmd, cmdstr);
547 /* Add the command to the command array */
548 sed_cmd_tail->next = sed_cmd;
549 sed_cmd_tail = sed_cmd_tail->next;
552 /* If we glued multiple lines together, free the memory. */
560 char *buf; /* Space to hold string */
561 int idx; /* Space used */
562 int len; /* Space allocated */
567 void pipe_putc(char c)
569 if(pipeline.idx==pipeline.len) {
570 pipeline.buf = xrealloc(pipeline.buf, pipeline.len + PIPE_GROW);
571 pipeline.len+=PIPE_GROW;
573 pipeline.buf[pipeline.idx++] = (c);
576 static void do_subst_w_backrefs(const char *line, const char *replace)
580 /* go through the replacement string */
581 for (i = 0; replace[i]; i++) {
582 /* if we find a backreference (\1, \2, etc.) print the backref'ed * text */
583 if (replace[i] == '\\' && replace[i+1]>'0' && replace[i+1]<='9') {
584 int backref=replace[++i]-'0';
586 /* print out the text held in regmatch[backref] */
587 if(regmatch[backref].rm_so != -1)
588 for (j = regmatch[backref].rm_so; j < regmatch[backref].rm_eo; j++)
592 /* if we find a backslash escaped character, print the character */
593 else if (replace[i] == '\\') pipe_putc(replace[++i]);
595 /* if we find an unescaped '&' print out the whole matched text. */
596 else if (replace[i] == '&')
597 for (j = regmatch[0].rm_so; j < regmatch[0].rm_eo; j++)
599 /* Otherwise just output the character. */
600 else pipe_putc(replace[i]);
604 static int do_subst_command(sed_cmd_t * sed_cmd, char **line)
606 char *oldline = *line;
609 regex_t *current_regex;
611 /* Handle empty regex. */
612 if (sed_cmd->sub_match == NULL) {
613 current_regex = previous_regex_ptr;
615 bb_error_msg_and_die("No previous regexp.");
616 } else previous_regex_ptr = current_regex = sed_cmd->sub_match;
618 /* Find the first match */
619 if(REG_NOMATCH==regexec(current_regex, oldline, 10, regmatch, 0))
622 /* Initialize temporary output buffer. */
623 pipeline.buf=xmalloc(PIPE_GROW);
624 pipeline.len=PIPE_GROW;
627 /* Now loop through, substituting for matches */
631 /* Work around bug in glibc regexec, demonstrated by:
632 echo " a.b" | busybox sed 's [^ .]* x g'
633 The match_count check is so not to break
634 echo "hi" | busybox sed 's/^/!/g' */
635 if(!regmatch[0].rm_so && !regmatch[0].rm_eo && match_count) {
636 pipe_putc(*(oldline++));
642 /* If we aren't interested in this match, output old line to
643 end of match and continue */
644 if(sed_cmd->which_match && sed_cmd->which_match!=match_count) {
645 for(i=0;i<regmatch[0].rm_eo;i++)
646 pipe_putc(oldline[i]);
650 /* print everything before the match */
651 for (i = 0; i < regmatch[0].rm_so; i++) pipe_putc(oldline[i]);
653 /* then print the substitution string */
654 do_subst_w_backrefs(oldline, sed_cmd->string);
656 /* advance past the match */
657 oldline += regmatch[0].rm_eo;
658 /* flag that something has changed */
661 /* if we're not doing this globally, get out now */
662 if (sed_cmd->which_match) break;
663 } while (*oldline && (regexec(current_regex, oldline, 10, regmatch, 0) != REG_NOMATCH));
665 /* Copy rest of string into output pipeline */
667 while(*oldline) pipe_putc(*(oldline++));
671 *line = pipeline.buf;
675 /* Set command pointer to point to this label. (Does not handle null label.) */
676 static sed_cmd_t *branch_to(const char *label)
680 for (sed_cmd = sed_cmd_head.next; sed_cmd; sed_cmd = sed_cmd->next) {
681 if ((sed_cmd->cmd == ':') && (sed_cmd->string) && (strcmp(sed_cmd->string, label) == 0)) {
685 bb_error_msg_and_die("Can't find label for jump to `%s'", label);
688 /* Append copy of string to append buffer */
689 static void append(char *s)
691 struct append_list *temp=calloc(1,sizeof(struct append_list));
694 append_tail=(append_tail->next=temp);
695 else append_head=append_tail=temp;
696 temp->string=strdup(s);
699 static void flush_append(void)
701 /* Output appended lines. */
703 fprintf(nonstdout,"%s\n",append_head->string);
704 append_tail=append_head->next;
705 free(append_head->string);
707 append_head=append_tail;
709 append_head=append_tail=NULL;
712 /* Get next line of input, flushing append buffer and noting if we hit EOF
713 * without a newline on the last line.
715 static char *get_next_line(FILE * file, int *no_newline)
721 temp=bb_get_line_from_file(file);
724 if(len && temp[len-1]=='\n') temp[len-1]=0;
731 /* Output line of text. missing_newline means the last line output did not
732 end with a newline. no_newline means this line does not end with a
735 static int puts_maybe_newline(char *s, FILE *file, int missing_newline, int no_newline)
737 if(missing_newline) fputc('\n',file);
739 if(!no_newline) fputc('\n',file);
742 fprintf(stderr,"Write failed.\n");
743 exit(4); /* It's what gnu sed exits with... */
749 #define sed_puts(s,n) missing_newline=puts_maybe_newline(s,nonstdout,missing_newline,n)
751 static void process_file(FILE *file)
753 char *pattern_space, *next_line, *hold_space=NULL;
754 static int linenum = 0, missing_newline=0;
755 int no_newline,next_no_newline=0;
757 next_line = get_next_line(file,&next_no_newline);
759 /* go through every line in the file */
764 /* Advance to next line. Stop if out of lines. */
765 if(!(pattern_space=next_line)) break;
766 no_newline=next_no_newline;
768 /* Read one line in advance so we can act on the last line, the '$' address */
769 next_line = get_next_line(file,&next_no_newline);
772 /* for every line, go through all the commands */
773 for (sed_cmd = sed_cmd_head.next; sed_cmd; sed_cmd = sed_cmd->next) {
774 int old_matched, matched;
776 old_matched = sed_cmd->in_match;
778 /* Determine if this command matches this line: */
780 /* Are we continuing a previous multi-line match? */
782 sed_cmd->in_match = sed_cmd->in_match
784 /* Or is no range necessary? */
785 || (!sed_cmd->beg_line && !sed_cmd->end_line
786 && !sed_cmd->beg_match && !sed_cmd->end_match)
788 /* Or did we match the start of a numerical range? */
789 || (sed_cmd->beg_line > 0 && (sed_cmd->beg_line == linenum))
791 /* Or does this line match our begin address regex? */
792 || (sed_cmd->beg_match &&
793 !regexec(sed_cmd->beg_match, pattern_space, 0, NULL, 0))
795 /* Or did we match last line of input? */
796 || (sed_cmd->beg_line == -1 && next_line == NULL);
798 /* Snapshot the value */
800 matched = sed_cmd->in_match;
802 /* Is this line the end of the current match? */
805 sed_cmd->in_match = !(
806 /* has the ending line come, or is this a single address command? */
808 sed_cmd->end_line==-1 ?
810 : sed_cmd->end_line<=linenum
811 : !sed_cmd->end_match)
812 /* or does this line matches our last address regex */
813 || (sed_cmd->end_match && old_matched && (regexec(sed_cmd->end_match, pattern_space, 0, NULL, 0) == 0))
817 /* Skip blocks of commands we didn't match. */
818 if (sed_cmd->cmd == '{') {
819 if(sed_cmd->invert ? matched : !matched)
820 while(sed_cmd && sed_cmd->cmd!='}') sed_cmd=sed_cmd->next;
821 if(!sed_cmd) bb_error_msg_and_die("Unterminated {");
825 /* Okay, so did this line match? */
826 if (sed_cmd->invert ? !matched : matched) {
827 /* Update last used regex in case a blank substitute BRE is found */
828 if (sed_cmd->beg_match) {
829 previous_regex_ptr = sed_cmd->beg_match;
833 switch (sed_cmd->cmd) {
835 /* Print line number */
837 fprintf(nonstdout,"%d\n", linenum);
840 /* Write the current pattern space up to the first newline */
843 char *tmp = strchr(pattern_space, '\n');
847 sed_puts(pattern_space,1);
854 /* Write the current pattern space to output */
856 sed_puts(pattern_space,no_newline);
858 /* Delete up through first newline */
861 char *tmp = strchr(pattern_space,'\n');
864 tmp=bb_xstrdup(tmp+1);
870 /* discard this line. */
874 /* Substitute with regex */
876 if(do_subst_command(sed_cmd, &pattern_space)) {
879 /* handle p option */
881 sed_puts(pattern_space,no_newline);
882 /* handle w option */
884 sed_cmd->no_newline=puts_maybe_newline(pattern_space, sed_cmd->file, sed_cmd->no_newline, no_newline);
889 /* Append line to linked list to be printed later */
892 append(sed_cmd->string);
896 /* Insert text before this line */
898 sed_puts(sed_cmd->string,1);
901 /* Cut and paste text (replace) */
903 /* Only triggers on last line of a matching range. */
904 if (!sed_cmd->in_match) sed_puts(sed_cmd->string,1);
907 /* Read file, append contents to output */
912 outfile = fopen(sed_cmd->string, "r");
916 while ((line = bb_get_chomped_line_from_file(outfile))
919 bb_xprint_and_close_file(outfile);
925 /* Write pattern space to file. */
927 sed_cmd->no_newline=puts_maybe_newline(pattern_space,sed_cmd->file, sed_cmd->no_newline,no_newline);
930 /* Read next line from input */
933 sed_puts(pattern_space,no_newline);
936 pattern_space = next_line;
937 no_newline=next_no_newline;
938 next_line = get_next_line(file,&next_no_newline);
944 /* Quit. End of script, end of input. */
946 /* Exit the outer while loop */
949 goto discard_commands;
951 /* Append the next line to the current line */
954 /* If no next line, jump to end of script and exit. */
955 if (next_line == NULL) {
956 /* Jump to end of script and exit */
960 /* append next_line, read new next_line. */
962 int len=strlen(pattern_space);
964 pattern_space = realloc(pattern_space, len + strlen(next_line) + 2);
965 pattern_space[len]='\n';
966 strcpy(pattern_space+len+1, next_line);
967 no_newline=next_no_newline;
968 next_line = get_next_line(file,&next_no_newline);
974 /* Test if substition worked, branch if so. */
976 if (!substituted) break;
979 /* Branch to label */
981 if (!sed_cmd->string) goto discard_commands;
982 else sed_cmd = branch_to(sed_cmd->string);
984 /* Transliterate characters */
989 for (i = 0; pattern_space[i]; i++) {
992 for (j = 0; sed_cmd->string[j]; j += 2) {
993 if (pattern_space[i] == sed_cmd->string[j]) {
994 pattern_space[i] = sed_cmd->string[j + 1];
1001 case 'g': /* Replace pattern space with hold space */
1002 free(pattern_space);
1004 pattern_space = strdup(hold_space);
1008 case 'G': /* Append newline and hold space to pattern space */
1010 int pattern_space_size = 2;
1011 int hold_space_size = 0;
1014 pattern_space_size += strlen(pattern_space);
1015 if (hold_space) hold_space_size = strlen(hold_space);
1016 pattern_space = xrealloc(pattern_space, pattern_space_size + hold_space_size);
1017 if (pattern_space_size == 2) pattern_space[0]=0;
1018 strcat(pattern_space, "\n");
1019 if (hold_space) strcat(pattern_space, hold_space);
1024 case 'h': /* Replace hold space with pattern space */
1026 hold_space = strdup(pattern_space);
1028 case 'H': /* Append newline and pattern space to hold space */
1030 int hold_space_size = 2;
1031 int pattern_space_size = 0;
1033 if (hold_space) hold_space_size += strlen(hold_space);
1035 pattern_space_size = strlen(pattern_space);
1036 hold_space = xrealloc(hold_space,
1037 hold_space_size + pattern_space_size);
1039 if (hold_space_size == 2) hold_space[0]=0;
1040 strcat(hold_space, "\n");
1041 if (pattern_space) strcat(hold_space, pattern_space);
1045 case 'x': /* Exchange hold and pattern space */
1047 char *tmp = pattern_space;
1048 pattern_space = hold_space;
1058 * exit point from sedding...
1061 /* we will print the line unless we were told to be quiet ('-n')
1062 or if the line was suppressed (ala 'd'elete) */
1063 if (!be_quiet) sed_puts(pattern_space,no_newline);
1065 /* Delete and such jump here. */
1068 free(pattern_space);
1072 /* It is possible to have a command line argument with embedded
1073 newlines. This counts as multiple command lines. */
1075 static void add_cmd_block(char *cmdstr)
1078 char *temp=bb_xstrdup(cmdstr),*temp2=temp;
1081 int len=strcspn(temp2,"\n");
1082 if(!temp2[len]) go=0;
1090 extern int sed_main(int argc, char **argv)
1092 int opt, status = EXIT_SUCCESS;
1094 #ifdef CONFIG_FEATURE_CLEAN_UP
1095 /* destroy command strings on exit */
1096 if (atexit(free_and_close_stuff) == -1)
1097 bb_perror_msg_and_die("atexit");
1100 #define LIE_TO_AUTOCONF
1101 #ifdef LIE_TO_AUTOCONF
1102 if(argc==2 && !strcmp(argv[1],"--version")) {
1103 printf("This is not GNU sed version 4.0\n");
1108 /* do normal option parsing */
1109 while ((opt = getopt(argc, argv, "ine:f:")) > 0) {
1113 atexit(cleanup_outname);
1119 add_cmd_block(optarg);
1126 cmdfile = bb_xfopen(optarg, "r");
1128 while ((line = bb_get_chomped_line_from_file(cmdfile))
1133 bb_xprint_and_close_file(cmdfile);
1142 /* if we didn't get a pattern from a -e and no command file was specified,
1143 * argv[optind] should be the pattern. no pattern, no worky */
1144 if (sed_cmd_head.next == NULL) {
1145 if (argv[optind] == NULL)
1148 add_cmd_block(argv[optind++]);
1150 /* Flush any unfinished commands. */
1153 /* By default, we write to stdout */
1156 /* argv[(optind)..(argc-1)] should be names of file to process. If no
1157 * files were specified or '-' was specified, take input from stdin.
1158 * Otherwise, we process all the files specified. */
1159 if (argv[optind] == NULL) {
1161 fprintf(stderr,"sed: Filename required for -i\n");
1164 process_file(stdin);
1169 for (i = optind; i < argc; i++) {
1170 if(!strcmp(argv[i], "-") && !in_place) {
1171 process_file(stdin);
1173 file = bb_wfopen(argv[i], "r");
1176 struct stat statbuf;
1177 outname=bb_xstrndup(argv[i],strlen(argv[i])+6);
1178 strcat(outname,"XXXXXX");
1179 /* Set permissions of output file */
1180 fstat(fileno(file),&statbuf);
1182 nonstdout=bb_wfopen(outname,"w");
1183 /* Set permissions of output file */
1184 fstat(fileno(file),&statbuf);
1185 fchmod(fileno(file),statbuf.st_mode);
1186 atexit(cleanup_outname);
1194 rename(outname,argv[i]);
1199 status = EXIT_FAILURE;