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@iinet.net.au>
9 * Copyright (C) 2003,2004 by Rob Landley <rob@landley.net>
11 * MAINTAINER: Rob Landley <rob@landley.net>
13 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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.
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
24 (bbg.sed_cmd_head/bbg.sed_cmd_tail).
26 add_input_file() adds a FILE * to the list of input files. We need to
27 know all input sources ahead of time to find the last line for the $ match.
29 process_files() does actual sedding, reading data lines from each input FILE *
30 (which could be stdin) and applying the sed command list (sed_cmd_head) to
31 each of the resulting lines.
33 sed_main() is where external code calls into this, with a command line.
38 Supported features and commands in this version of sed:
41 - address matching: num|/matchstr/[,num|/matchstr/|$]command
42 - commands: (p)rint, (d)elete, (s)ubstitue (with g & I flags)
43 - edit commands: (a)ppend, (i)nsert, (c)hange
44 - file commands: (r)ead
45 - backreferences in substitution expressions (\0, \1, \2...\9)
46 - grouped commands: {cmd1;cmd2}
47 - transliteration (y/source-chars/dest-chars/)
48 - pattern space hold space storing / swapping (g, h, x)
49 - labels / branching (: label, b, t, T)
51 (Note: Specifying an address (range) to match is *optional*; commands
52 default to the whole pattern space if no specific address match was
56 - Create a wrapper around regex to make libc's regex conform with sed
58 Reference http://www.opengroup.org/onlinepubs/007904975/utilities/sed.html
64 /* Each sed command turns into one of these structures. */
65 typedef struct sed_cmd_s {
66 /* Ordered by alignment requirements: currently 36 bytes on x86 */
69 regex_t *beg_match; /* sed -e '/match/cmd' */
70 regex_t *end_match; /* sed -e '/match/,/end_match/cmd' */
71 regex_t *sub_match; /* For 's/sub_match/string/' */
72 int beg_line; /* 'sed 1p' 0 == apply commands to all lines */
73 int end_line; /* 'sed 1,3p' 0 == one line only. -1 = last line ($) */
75 FILE *file; /* File (sw) command writes to, -1 for none. */
76 char *string; /* Data string for (saicytb) commands. */
78 unsigned short which_match; /* (s) Which match to replace (0 for all) */
80 /* Bitfields (gcc won't group them if we don't) */
81 unsigned int invert:1; /* the '!' after the address */
82 unsigned int in_match:1; /* Next line also included in match? */
83 unsigned int no_newline:1; /* Last line written by (sw) had no '\n' */
84 unsigned int sub_p:1; /* (s) print option */
87 char cmd; /* The command char: abcdDgGhHilnNpPqrstwxy:={} */
88 struct sed_cmd_s *next; /* Next command (linked list, NULL terminated) */
91 static const char *const semicolon_whitespace = "; \n\r\t\v";
96 int be_quiet, in_place, regex_type;
98 char *outname, *hold_space;
100 /* List of input files */
101 int input_file_count,current_input_file;
102 FILE **input_file_list;
104 regmatch_t regmatch[10];
105 regex_t *previous_regex_ptr;
107 /* linked list of sed commands */
108 sed_cmd_t sed_cmd_head, *sed_cmd_tail;
110 /* Linked list of append lines */
111 llist_t *append_head;
116 char *buf; /* Space to hold string */
117 int idx; /* Space used */
118 int len; /* Space allocated */
123 void sed_free_and_close_stuff(void);
124 #if ENABLE_FEATURE_CLEAN_UP
125 void sed_free_and_close_stuff(void)
127 sed_cmd_t *sed_cmd = bbg.sed_cmd_head.next;
129 llist_free(bbg.append_head, free);
132 sed_cmd_t *sed_cmd_next = sed_cmd->next;
135 xprint_and_close_file(sed_cmd->file);
137 if (sed_cmd->beg_match) {
138 regfree(sed_cmd->beg_match);
139 free(sed_cmd->beg_match);
141 if (sed_cmd->end_match) {
142 regfree(sed_cmd->end_match);
143 free(sed_cmd->end_match);
145 if (sed_cmd->sub_match) {
146 regfree(sed_cmd->sub_match);
147 free(sed_cmd->sub_match);
149 free(sed_cmd->string);
151 sed_cmd = sed_cmd_next;
154 if(bbg.hold_space) free(bbg.hold_space);
156 while(bbg.current_input_file<bbg.input_file_count)
157 fclose(bbg.input_file_list[bbg.current_input_file++]);
161 /* If something bad happens during -i operation, delete temp file */
163 static void cleanup_outname(void)
165 if(bbg.outname) unlink(bbg.outname);
168 /* strdup, replacing "\n" with '\n', and "\delimiter" with 'delimiter' */
170 static void parse_escapes(char *dest, char *string, int len, char from, char to)
175 if(string[i] == '\\') {
176 if(!to || string[i+1] == from) {
177 *(dest++) = to ? to : string[i+1];
180 } else *(dest++)=string[i++];
182 *(dest++) = string[i++];
187 static char *copy_parsing_escapes(char *string, int len)
189 char *dest=xmalloc(len+1);
191 parse_escapes(dest,string,len,'n','\n');
197 * index_of_next_unescaped_regexp_delim - walks left to right through a string
198 * beginning at a specified index and returns the index of the next regular
199 * expression delimiter (typically a forward * slash ('/')) not preceded by
200 * a backslash ('\'). A negative delimiter disables square bracket checking.
202 static int index_of_next_unescaped_regexp_delim(int delimiter, char *str)
214 for (; (ch = str[idx]); idx++) {
216 if (ch == ']' && !(bracket == idx - 1 || (bracket == idx - 2
217 && str[idx - 1] == '^')))
223 else if (bracket == -1 && ch == '[')
225 else if (ch == delimiter)
229 /* if we make it to here, we've hit the end of the string */
230 bb_error_msg_and_die("unmatched '%c'",delimiter);
234 * Returns the index of the third delimiter
236 static int parse_regex_delim(char *cmdstr, char **match, char **replace)
238 char *cmdstr_ptr = cmdstr;
242 /* verify that the 's' or 'y' is followed by something. That something
243 * (typically a 'slash') is now our regexp delimiter... */
245 bb_error_msg_and_die("bad format in substitution expression");
246 delimiter = *(cmdstr_ptr++);
248 /* save the match string */
249 idx = index_of_next_unescaped_regexp_delim(delimiter, cmdstr_ptr);
250 *match = copy_parsing_escapes(cmdstr_ptr, idx);
252 /* save the replacement string */
253 cmdstr_ptr += idx + 1;
254 idx = index_of_next_unescaped_regexp_delim(-delimiter, cmdstr_ptr);
255 *replace = copy_parsing_escapes(cmdstr_ptr, idx);
257 return ((cmdstr_ptr - cmdstr) + idx);
261 * returns the index in the string just past where the address ends.
263 static int get_address(char *my_str, int *linenum, regex_t ** regex)
267 if (isdigit(*my_str)) {
268 *linenum = strtol(my_str, &pos, 10);
269 /* endstr shouldnt ever equal NULL */
270 } else if (*my_str == '$') {
273 } else if (*my_str == '/' || *my_str == '\\') {
278 if (*my_str == '\\') delimiter = *(++pos);
279 else delimiter = '/';
280 next = index_of_next_unescaped_regexp_delim(delimiter, ++pos);
281 temp = copy_parsing_escapes(pos,next);
282 *regex = (regex_t *) xmalloc(sizeof(regex_t));
283 xregcomp(*regex, temp, bbg.regex_type|REG_NEWLINE);
285 /* Move position to next character after last delimiter */
291 /* Grab a filename. Whitespace at start is skipped, then goes to EOL. */
292 static int parse_file_cmd(sed_cmd_t *sed_cmd, char *filecmdstr, char **retval)
294 int start = 0, idx, hack=0;
296 /* Skip whitespace, then grab filename to end of line */
297 while (isspace(filecmdstr[start])) start++;
299 while(filecmdstr[idx] && filecmdstr[idx]!='\n') idx++;
300 /* If lines glued together, put backslash back. */
301 if(filecmdstr[idx]=='\n') hack=1;
302 if(idx==start) bb_error_msg_and_die("Empty filename");
303 *retval = xstrndup(filecmdstr+start, idx-start+hack+1);
304 if(hack) *(idx+*retval)='\\';
309 static int parse_subst_cmd(sed_cmd_t *sed_cmd, char *substr)
311 int cflags = bbg.regex_type;
316 * A substitution command should look something like this:
317 * s/match/replace/ #gIpw
321 idx = parse_regex_delim(substr, &match, &sed_cmd->string);
323 /* determine the number of back references in the match string */
324 /* Note: we compute this here rather than in the do_subst_command()
325 * function to save processor time, at the expense of a little more memory
326 * (4 bits) per sed_cmd */
328 /* process the flags */
330 sed_cmd->which_match=1;
331 while (substr[++idx]) {
332 /* Parse match number */
333 if(isdigit(substr[idx])) {
335 /* Match 0 treated as all, multiple matches we take the last one. */
336 char *pos=substr+idx;
337 sed_cmd->which_match=(unsigned short)strtol(substr+idx,&pos,10);
343 if(isspace(substr[idx])) continue;
345 switch (substr[idx]) {
346 /* Replace all occurrences */
348 if (match[0] != '^') sed_cmd->which_match = 0;
350 /* Print pattern space */
358 idx+=parse_file_cmd(sed_cmd,substr+idx,&temp);
362 /* Ignore case (gnu exension) */
368 while(substr[++idx]);
375 bb_error_msg_and_die("bad option in substitution expression");
379 /* compile the match string into a regex */
380 if (*match != '\0') {
381 /* If match is empty, we use last regex used at runtime */
382 sed_cmd->sub_match = (regex_t *) xmalloc(sizeof(regex_t));
383 xregcomp(sed_cmd->sub_match, match, cflags);
391 * Process the commands arguments
393 static char *parse_cmd_args(sed_cmd_t *sed_cmd, char *cmdstr)
395 /* handle (s)ubstitution command */
396 if (sed_cmd->cmd == 's') cmdstr += parse_subst_cmd(sed_cmd, cmdstr);
397 /* handle edit cmds: (a)ppend, (i)nsert, and (c)hange */
398 else if (strchr("aic", sed_cmd->cmd)) {
399 if ((sed_cmd->end_line || sed_cmd->end_match) && sed_cmd->cmd != 'c')
401 ("only a beginning address can be specified for edit commands");
403 if(*cmdstr=='\n' || *cmdstr=='\\') {
406 } else if(isspace(*cmdstr)) cmdstr++;
409 sed_cmd->string = xstrdup(cmdstr);
410 parse_escapes(sed_cmd->string,sed_cmd->string,strlen(cmdstr),0,0);
411 cmdstr += strlen(cmdstr);
412 /* handle file cmds: (r)ead */
413 } else if(strchr("rw", sed_cmd->cmd)) {
414 if (sed_cmd->end_line || sed_cmd->end_match)
415 bb_error_msg_and_die("Command only uses one address");
416 cmdstr += parse_file_cmd(sed_cmd, cmdstr, &sed_cmd->string);
417 if(sed_cmd->cmd=='w')
418 sed_cmd->file=xfopen(sed_cmd->string,"w");
419 /* handle branch commands */
420 } else if (strchr(":btT", sed_cmd->cmd)) {
423 while(isspace(*cmdstr)) cmdstr++;
424 length = strcspn(cmdstr, semicolon_whitespace);
426 sed_cmd->string = xstrndup(cmdstr, length);
430 /* translation command */
431 else if (sed_cmd->cmd == 'y') {
432 char *match, *replace;
435 cmdstr+=parse_regex_delim(cmdstr, &match, &replace)+1;
436 /* \n already parsed, but \delimiter needs unescaping. */
437 parse_escapes(match,match,strlen(match),i,i);
438 parse_escapes(replace,replace,strlen(replace),i,i);
440 sed_cmd->string = xzalloc((strlen(match) + 1) * 2);
441 for (i = 0; match[i] && replace[i]; i++) {
442 sed_cmd->string[i * 2] = match[i];
443 sed_cmd->string[(i * 2) + 1] = replace[i];
448 /* if it wasnt a single-letter command that takes no arguments
449 * then it must be an invalid command.
451 else if (strchr("dDgGhHlnNpPqx={}", sed_cmd->cmd) == 0) {
452 bb_error_msg_and_die("Unsupported command %c", sed_cmd->cmd);
455 /* give back whatever's left over */
460 /* Parse address+command sets, skipping comment lines. */
462 static void add_cmd(char *cmdstr)
467 /* Append this line to any unfinished line from last time. */
468 if (bbg.add_cmd_line) {
469 cmdstr = xasprintf("%s\n%s", bbg.add_cmd_line, cmdstr);
470 free(bbg.add_cmd_line);
471 bbg.add_cmd_line = cmdstr;
474 /* If this line ends with backslash, request next line. */
476 if(temp && cmdstr[temp-1]=='\\') {
477 if (!bbg.add_cmd_line) bbg.add_cmd_line = xstrdup(cmdstr);
478 bbg.add_cmd_line[temp-1] = 0;
482 /* Loop parsing all commands in this line. */
484 /* Skip leading whitespace and semicolons */
485 cmdstr += strspn(cmdstr, semicolon_whitespace);
487 /* If no more commands, exit. */
490 /* if this is a comment, jump past it and keep going */
491 if (*cmdstr == '#') {
492 /* "#n" is the same as using -n on the command line */
493 if (cmdstr[1] == 'n') bbg.be_quiet++;
494 if(!(cmdstr=strpbrk(cmdstr, "\n\r"))) break;
499 * format is: [addr][,addr][!]cmd
504 sed_cmd = xzalloc(sizeof(sed_cmd_t));
506 /* first part (if present) is an address: either a '$', a number or a /regex/ */
507 cmdstr += get_address(cmdstr, &sed_cmd->beg_line, &sed_cmd->beg_match);
509 /* second part (if present) will begin with a comma */
510 if (*cmdstr == ',') {
514 idx = get_address(cmdstr, &sed_cmd->end_line, &sed_cmd->end_match);
515 if (!idx) bb_error_msg_and_die("no address after comma");
519 /* skip whitespace before the command */
520 while (isspace(*cmdstr)) cmdstr++;
522 /* Check for inversion flag */
523 if (*cmdstr == '!') {
527 /* skip whitespace before the command */
528 while (isspace(*cmdstr)) cmdstr++;
531 /* last part (mandatory) will be a command */
532 if (!*cmdstr) bb_error_msg_and_die("missing command");
533 sed_cmd->cmd = *(cmdstr++);
534 cmdstr = parse_cmd_args(sed_cmd, cmdstr);
536 /* Add the command to the command array */
537 bbg.sed_cmd_tail->next = sed_cmd;
538 bbg.sed_cmd_tail = bbg.sed_cmd_tail->next;
541 /* If we glued multiple lines together, free the memory. */
542 free(bbg.add_cmd_line);
543 bbg.add_cmd_line = NULL;
546 /* Append to a string, reallocating memory as necessary. */
550 static void pipe_putc(char c)
552 if(bbg.pipeline.idx==bbg.pipeline.len) {
553 bbg.pipeline.buf = xrealloc(bbg.pipeline.buf,
554 bbg.pipeline.len + PIPE_GROW);
555 bbg.pipeline.len+=PIPE_GROW;
557 bbg.pipeline.buf[bbg.pipeline.idx++] = c;
560 static void do_subst_w_backrefs(char *line, char *replace)
564 /* go through the replacement string */
565 for (i = 0; replace[i]; i++) {
566 /* if we find a backreference (\1, \2, etc.) print the backref'ed * text */
567 if (replace[i] == '\\' && replace[i+1]>='0' && replace[i+1]<='9') {
568 int backref=replace[++i]-'0';
570 /* print out the text held in bbg.regmatch[backref] */
571 if(bbg.regmatch[backref].rm_so != -1)
572 for (j = bbg.regmatch[backref].rm_so;
573 j < bbg.regmatch[backref].rm_eo; j++) pipe_putc(line[j]);
576 /* if we find a backslash escaped character, print the character */
577 else if (replace[i] == '\\') pipe_putc(replace[++i]);
579 /* if we find an unescaped '&' print out the whole matched text. */
580 else if (replace[i] == '&')
581 for (j = bbg.regmatch[0].rm_so; j < bbg.regmatch[0].rm_eo; j++)
583 /* Otherwise just output the character. */
584 else pipe_putc(replace[i]);
588 static int do_subst_command(sed_cmd_t *sed_cmd, char **line)
590 char *oldline = *line;
593 regex_t *current_regex;
595 /* Handle empty regex. */
596 if (sed_cmd->sub_match == NULL) {
597 current_regex = bbg.previous_regex_ptr;
599 bb_error_msg_and_die("No previous regexp.");
600 } else bbg.previous_regex_ptr = current_regex = sed_cmd->sub_match;
602 /* Find the first match */
603 if(REG_NOMATCH==regexec(current_regex, oldline, 10, bbg.regmatch, 0))
606 /* Initialize temporary output buffer. */
607 bbg.pipeline.buf=xmalloc(PIPE_GROW);
608 bbg.pipeline.len=PIPE_GROW;
611 /* Now loop through, substituting for matches */
615 /* Work around bug in glibc regexec, demonstrated by:
616 echo " a.b" | busybox sed 's [^ .]* x g'
617 The match_count check is so not to break
618 echo "hi" | busybox sed 's/^/!/g' */
619 if(!bbg.regmatch[0].rm_so && !bbg.regmatch[0].rm_eo && match_count) {
620 pipe_putc(*(oldline++));
626 /* If we aren't interested in this match, output old line to
627 end of match and continue */
628 if(sed_cmd->which_match && sed_cmd->which_match!=match_count) {
629 for(i=0;i<bbg.regmatch[0].rm_eo;i++)
630 pipe_putc(*(oldline++));
634 /* print everything before the match */
635 for (i = 0; i < bbg.regmatch[0].rm_so; i++) pipe_putc(oldline[i]);
637 /* then print the substitution string */
638 do_subst_w_backrefs(oldline, sed_cmd->string);
640 /* advance past the match */
641 oldline += bbg.regmatch[0].rm_eo;
642 /* flag that something has changed */
645 /* if we're not doing this globally, get out now */
646 if (sed_cmd->which_match) break;
647 } while (*oldline && (regexec(current_regex, oldline, 10, bbg.regmatch, 0) != REG_NOMATCH));
649 /* Copy rest of string into output pipeline */
651 while(*oldline) pipe_putc(*(oldline++));
655 *line = bbg.pipeline.buf;
659 /* Set command pointer to point to this label. (Does not handle null label.) */
660 static sed_cmd_t *branch_to(char *label)
664 for (sed_cmd = bbg.sed_cmd_head.next; sed_cmd; sed_cmd = sed_cmd->next) {
665 if ((sed_cmd->cmd == ':') && (sed_cmd->string) && (strcmp(sed_cmd->string, label) == 0)) {
669 bb_error_msg_and_die("Can't find label for jump to `%s'", label);
672 static void append(char *s)
674 llist_add_to_end(&bbg.append_head, xstrdup(s));
677 static void flush_append(void)
681 /* Output appended lines. */
682 while((data = (char *)llist_pop(&bbg.append_head))) {
683 fprintf(bbg.nonstdout,"%s\n",data);
688 static void add_input_file(FILE *file)
690 bbg.input_file_list=xrealloc(bbg.input_file_list,
691 (bbg.input_file_count + 1) * sizeof(FILE *));
692 bbg.input_file_list[bbg.input_file_count++] = file;
695 /* Get next line of input from bbg.input_file_list, flushing append buffer and
696 * noting if we ran out of files without a newline on the last line we read.
698 static char *get_next_line(int *no_newline)
704 while (bbg.current_input_file<bbg.input_file_count) {
705 temp = bb_get_chunk_from_file(bbg.input_file_list[bbg.current_input_file],&len);
707 *no_newline = !(len && temp[len-1]=='\n');
708 if (!*no_newline) temp[len-1] = 0;
710 // Close this file and advance to next one
711 } else fclose(bbg.input_file_list[bbg.current_input_file++]);
717 /* Output line of text. missing_newline means the last line output did not
718 end with a newline. no_newline means this line does not end with a
721 static int puts_maybe_newline(char *s, FILE *file, int missing_newline, int no_newline)
723 if(missing_newline) fputc('\n',file);
725 if(!no_newline) fputc('\n',file);
728 bb_default_error_retval = 4; /* It's what gnu sed exits with... */
729 bb_error_msg_and_die(bb_msg_write_error);
735 #define sed_puts(s,n) missing_newline=puts_maybe_newline(s,bbg.nonstdout,missing_newline,n)
737 /* Process all the lines in all the files */
739 static void process_files(void)
741 char *pattern_space, *next_line;
742 int linenum = 0, missing_newline=0;
743 int no_newline,next_no_newline=0;
746 next_line = get_next_line(&next_no_newline);
748 /* go through every line in each file */
753 /* Advance to next line. Stop if out of lines. */
754 if(!(pattern_space=next_line)) break;
755 no_newline=next_no_newline;
757 /* Read one line in advance so we can act on the last line,
759 next_line = get_next_line(&next_no_newline);
762 /* for every line, go through all the commands */
763 for (sed_cmd = bbg.sed_cmd_head.next; sed_cmd; sed_cmd = sed_cmd->next)
765 int old_matched, matched;
767 old_matched = sed_cmd->in_match;
769 /* Determine if this command matches this line: */
771 /* Are we continuing a previous multi-line match? */
773 sed_cmd->in_match = sed_cmd->in_match
775 /* Or is no range necessary? */
776 || (!sed_cmd->beg_line && !sed_cmd->end_line
777 && !sed_cmd->beg_match && !sed_cmd->end_match)
779 /* Or did we match the start of a numerical range? */
780 || (sed_cmd->beg_line > 0 && (sed_cmd->beg_line == linenum))
782 /* Or does this line match our begin address regex? */
783 || (sed_cmd->beg_match &&
784 !regexec(sed_cmd->beg_match, pattern_space, 0, NULL, 0))
786 /* Or did we match last line of input? */
787 || (sed_cmd->beg_line == -1 && next_line == NULL);
789 /* Snapshot the value */
791 matched = sed_cmd->in_match;
793 /* Is this line the end of the current match? */
796 sed_cmd->in_match = !(
797 /* has the ending line come, or is this a single address command? */
799 sed_cmd->end_line==-1 ?
801 : sed_cmd->end_line<=linenum
802 : !sed_cmd->end_match)
803 /* or does this line matches our last address regex */
804 || (sed_cmd->end_match && old_matched && (regexec(sed_cmd->end_match, pattern_space, 0, NULL, 0) == 0))
808 /* Skip blocks of commands we didn't match. */
809 if (sed_cmd->cmd == '{') {
810 if(sed_cmd->invert ? matched : !matched)
811 while(sed_cmd && sed_cmd->cmd!='}') sed_cmd=sed_cmd->next;
812 if(!sed_cmd) bb_error_msg_and_die("Unterminated {");
816 /* Okay, so did this line match? */
817 if (sed_cmd->invert ? !matched : matched) {
818 /* Update last used regex in case a blank substitute BRE is found */
819 if (sed_cmd->beg_match) {
820 bbg.previous_regex_ptr = sed_cmd->beg_match;
824 switch (sed_cmd->cmd) {
826 /* Print line number */
828 fprintf(bbg.nonstdout,"%d\n", linenum);
831 /* Write the current pattern space up to the first newline */
834 char *tmp = strchr(pattern_space, '\n');
838 sed_puts(pattern_space,1);
845 /* Write the current pattern space to output */
847 sed_puts(pattern_space,no_newline);
849 /* Delete up through first newline */
852 char *tmp = strchr(pattern_space,'\n');
861 /* discard this line. */
865 /* Substitute with regex */
867 if(do_subst_command(sed_cmd, &pattern_space)) {
870 /* handle p option */
872 sed_puts(pattern_space,no_newline);
873 /* handle w option */
875 sed_cmd->no_newline=puts_maybe_newline(pattern_space, sed_cmd->file, sed_cmd->no_newline, no_newline);
880 /* Append line to linked list to be printed later */
883 append(sed_cmd->string);
887 /* Insert text before this line */
889 sed_puts(sed_cmd->string,1);
892 /* Cut and paste text (replace) */
894 /* Only triggers on last line of a matching range. */
895 if (!sed_cmd->in_match) sed_puts(sed_cmd->string,0);
898 /* Read file, append contents to output */
903 rfile = fopen(sed_cmd->string, "r");
907 while ((line = bb_get_chomped_line_from_file(rfile))
910 xprint_and_close_file(rfile);
916 /* Write pattern space to file. */
918 sed_cmd->no_newline=puts_maybe_newline(pattern_space,sed_cmd->file, sed_cmd->no_newline,no_newline);
921 /* Read next line from input */
924 sed_puts(pattern_space,no_newline);
927 pattern_space = next_line;
928 no_newline=next_no_newline;
929 next_line = get_next_line(&next_no_newline);
935 /* Quit. End of script, end of input. */
937 /* Exit the outer while loop */
940 goto discard_commands;
942 /* Append the next line to the current line */
945 /* If no next line, jump to end of script and exit. */
946 if (next_line == NULL) {
947 /* Jump to end of script and exit */
951 /* append next_line, read new next_line. */
953 int len=strlen(pattern_space);
955 pattern_space = realloc(pattern_space, len + strlen(next_line) + 2);
956 pattern_space[len]='\n';
957 strcpy(pattern_space+len+1, next_line);
958 no_newline=next_no_newline;
959 next_line = get_next_line(&next_no_newline);
965 /* Test/branch if substitution occurred */
967 if(!substituted) break;
970 /* Test/branch if substitution didn't occur */
972 if (substituted) break;
974 /* Branch to label */
976 if (!sed_cmd->string) goto discard_commands;
977 else sed_cmd = branch_to(sed_cmd->string);
979 /* Transliterate characters */
984 for (i = 0; pattern_space[i]; i++) {
987 for (j = 0; sed_cmd->string[j]; j += 2) {
988 if (pattern_space[i] == sed_cmd->string[j]) {
989 pattern_space[i] = sed_cmd->string[j + 1];
997 case 'g': /* Replace pattern space with hold space */
999 pattern_space = xstrdup(bbg.hold_space ? bbg.hold_space : "");
1001 case 'G': /* Append newline and hold space to pattern space */
1003 int pattern_space_size = 2;
1004 int hold_space_size = 0;
1007 pattern_space_size += strlen(pattern_space);
1009 hold_space_size = strlen(bbg.hold_space);
1010 pattern_space = xrealloc(pattern_space,
1011 pattern_space_size + hold_space_size);
1012 if (pattern_space_size == 2) pattern_space[0]=0;
1013 strcat(pattern_space, "\n");
1015 strcat(pattern_space, bbg.hold_space);
1020 case 'h': /* Replace hold space with pattern space */
1021 free(bbg.hold_space);
1022 bbg.hold_space = xstrdup(pattern_space);
1024 case 'H': /* Append newline and pattern space to hold space */
1026 int hold_space_size = 2;
1027 int pattern_space_size = 0;
1030 hold_space_size += strlen(bbg.hold_space);
1032 pattern_space_size = strlen(pattern_space);
1033 bbg.hold_space = xrealloc(bbg.hold_space,
1034 hold_space_size + pattern_space_size);
1036 if (hold_space_size == 2) *bbg.hold_space=0;
1037 strcat(bbg.hold_space, "\n");
1038 if (pattern_space) strcat(bbg.hold_space, pattern_space);
1042 case 'x': /* Exchange hold and pattern space */
1044 char *tmp = pattern_space;
1045 pattern_space = bbg.hold_space ? : xzalloc(1);
1047 bbg.hold_space = tmp;
1055 * exit point from sedding...
1058 /* we will print the line unless we were told to be quiet ('-n')
1059 or if the line was suppressed (ala 'd'elete) */
1060 if (!bbg.be_quiet) sed_puts(pattern_space,no_newline);
1062 /* Delete and such jump here. */
1065 free(pattern_space);
1069 /* It is possible to have a command line argument with embedded
1070 newlines. This counts as multiple command lines. */
1072 static void add_cmd_block(char *cmdstr)
1075 char *temp=xstrdup(cmdstr),*temp2=temp;
1078 int len=strcspn(temp2,"\n");
1079 if(!temp2[len]) go=0;
1087 int sed_main(int argc, char **argv)
1089 int status = EXIT_SUCCESS, opt, getpat = 1;
1091 bbg.sed_cmd_tail=&bbg.sed_cmd_head;
1093 /* destroy command strings on exit */
1094 if (ENABLE_FEATURE_CLEAN_UP) atexit(sed_free_and_close_stuff);
1096 /* Lie to autoconf when it starts asking stupid questions. */
1097 if(argc==2 && !strcmp(argv[1],"--version")) {
1098 printf("This is not GNU sed version 4.0\n");
1102 /* do normal option parsing */
1103 while ((opt = getopt(argc, argv, "irne:f:")) > 0) {
1107 atexit(cleanup_outname);
1110 bbg.regex_type|=REG_EXTENDED;
1116 add_cmd_block(optarg);
1124 cmdfile = xfopen(optarg, "r");
1126 while ((line = bb_get_chomped_line_from_file(cmdfile)) != NULL) {
1131 xprint_and_close_file(cmdfile);
1140 /* if we didn't get a pattern from -e or -f, use argv[optind] */
1142 if (argv[optind] == NULL)
1145 add_cmd_block(argv[optind++]);
1147 /* Flush any unfinished commands. */
1150 /* By default, we write to stdout */
1151 bbg.nonstdout=stdout;
1153 /* argv[(optind)..(argc-1)] should be names of file to process. If no
1154 * files were specified or '-' was specified, take input from stdin.
1155 * Otherwise, we process all the files specified. */
1156 if (argv[optind] == NULL) {
1157 if(bbg.in_place) bb_error_msg_and_die(bb_msg_requires_arg, "-i");
1158 add_input_file(stdin);
1164 for (i = optind; i < argc; i++) {
1165 if(!strcmp(argv[i], "-") && !bbg.in_place) {
1166 add_input_file(stdin);
1169 file = bb_wfopen(argv[i], "r");
1172 struct stat statbuf;
1175 bbg.outname=xstrndup(argv[i],strlen(argv[i])+6);
1176 strcat(bbg.outname,"XXXXXX");
1177 if(-1==(nonstdoutfd=mkstemp(bbg.outname)))
1178 bb_error_msg_and_die("no temp file");
1179 bbg.nonstdout=fdopen(nonstdoutfd,"w");
1181 /* Set permissions of output file */
1183 fstat(fileno(file),&statbuf);
1184 fchmod(nonstdoutfd,statbuf.st_mode);
1185 add_input_file(file);
1187 fclose(bbg.nonstdout);
1189 bbg.nonstdout=stdout;
1191 rename(bbg.outname,argv[i]);
1194 } else add_input_file(file);
1196 status = EXIT_FAILURE;
1200 if(bbg.input_file_count>bbg.current_input_file) process_files();