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 (sed_cmd_head/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/|$]command
42 - commands: (p)rint, (d)elete, (s)ubstitue (with g & I flags)
43 - edit commands: (a)ppend, (i)nsert, (c)hange
44 - file commands: (r)ead
45 - backreferences in substitution expressions (\0, \1, \2...\9)
46 - grouped commands: {cmd1;cmd2}
47 - transliteration (y/source-chars/dest-chars/)
48 - pattern space hold space storing / swapping (g, h, x)
49 - labels / branching (: label, b, t, T)
51 (Note: Specifying an address (range) to match is *optional*; commands
52 default to the whole pattern space if no specific address match was
56 - Create a wrapper around regex to make libc's regex conform with sed
58 Reference http://www.opengroup.org/onlinepubs/007904975/utilities/sed.html
62 #include <unistd.h> /* for getopt() */
63 #include <string.h> /* for strdup() */
65 #include <ctype.h> /* for isspace() */
70 typedef struct sed_cmd_s {
71 /* Ordered by alignment requirements: currently 36 bytes on x86 */
74 regex_t *beg_match; /* sed -e '/match/cmd' */
75 regex_t *end_match; /* sed -e '/match/,/end_match/cmd' */
76 regex_t *sub_match; /* For 's/sub_match/string/' */
77 int beg_line; /* 'sed 1p' 0 == apply commands to all lines */
78 int end_line; /* 'sed 1,3p' 0 == one line only. -1 = last line ($) */
80 FILE *file; /* File (sw) command writes to, -1 for none. */
81 char *string; /* Data string for (saicytb) commands. */
83 unsigned short which_match; /* (s) Which match to replace (0 for all) */
85 /* Bitfields (gcc won't group them if we don't) */
86 unsigned int invert:1; /* the '!' after the address */
87 unsigned int in_match:1; /* Next line also included in match? */
88 unsigned int no_newline:1; /* Last line written by (sw) had no '\n' */
89 unsigned int sub_p:1; /* (s) print option */
93 char cmd; /* The command char: abcdDgGhHilnNpPqrstwxy:={} */
94 struct sed_cmd_s *next; /* Next command (linked list, NULL terminated) */
99 static int be_quiet, in_place, regex_type;
100 static FILE *nonstdout;
101 static char *outname,*hold_space;
103 /* List of input files */
104 static int input_file_count,current_input_file;
105 static FILE **input_file_list;
107 static const char bad_format_in_subst[] =
108 "bad format in substitution expression";
109 static const char *const semicolon_whitespace = "; \n\r\t\v";
111 static regmatch_t regmatch[10];
112 static regex_t *previous_regex_ptr;
114 /* linked list of sed commands */
115 static sed_cmd_t sed_cmd_head;
116 static sed_cmd_t *sed_cmd_tail = &sed_cmd_head;
118 /* Linked list of append lines */
121 struct append_list *next;
123 static struct append_list *append_head=NULL, *append_tail=NULL;
125 void sed_free_and_close_stuff(void);
126 #if ENABLE_FEATURE_CLEAN_UP
127 void sed_free_and_close_stuff(void)
129 sed_cmd_t *sed_cmd = sed_cmd_head.next;
132 append_tail=append_head->next;
133 free(append_head->string);
135 append_head=append_tail;
139 sed_cmd_t *sed_cmd_next = sed_cmd->next;
142 bb_xprint_and_close_file(sed_cmd->file);
144 if (sed_cmd->beg_match) {
145 regfree(sed_cmd->beg_match);
146 free(sed_cmd->beg_match);
148 if (sed_cmd->end_match) {
149 regfree(sed_cmd->end_match);
150 free(sed_cmd->end_match);
152 if (sed_cmd->sub_match) {
153 regfree(sed_cmd->sub_match);
154 free(sed_cmd->sub_match);
156 free(sed_cmd->string);
158 sed_cmd = sed_cmd_next;
161 if(hold_space) free(hold_space);
163 while(current_input_file<input_file_count)
164 fclose(input_file_list[current_input_file++]);
168 /* If something bad happens during -i operation, delete temp file */
170 static void cleanup_outname(void)
172 if(outname) unlink(outname);
175 /* strdup, replacing "\n" with '\n', and "\delimiter" with 'delimiter' */
177 static void parse_escapes(char *dest, const char *string, int len, char from, char to)
182 if(string[i] == '\\') {
183 if(!to || string[i+1] == from) {
184 *(dest++) = to ? to : string[i+1];
187 } else *(dest++)=string[i++];
189 *(dest++) = string[i++];
194 static char *copy_parsing_escapes(const char *string, int len)
196 char *dest=xmalloc(len+1);
198 parse_escapes(dest,string,len,'n','\n');
204 * index_of_next_unescaped_regexp_delim - walks left to right through a string
205 * beginning at a specified index and returns the index of the next regular
206 * expression delimiter (typically a forward * slash ('/')) not preceded by
209 static int index_of_next_unescaped_regexp_delim(const char delimiter,
217 for (; (ch = str[idx]); idx++) {
219 if (ch == ']' && !(bracket == idx - 1 || (bracket == idx - 2
220 && str[idx - 1] == '^')))
228 else if (ch == delimiter)
232 /* if we make it to here, we've hit the end of the string */
237 * Returns the index of the third delimiter
239 static int parse_regex_delim(const char *cmdstr, char **match, char **replace)
241 const char *cmdstr_ptr = cmdstr;
245 /* verify that the 's' or 'y' is followed by something. That something
246 * (typically a 'slash') is now our regexp delimiter... */
247 if (*cmdstr == '\0') bb_error_msg_and_die(bad_format_in_subst);
248 delimiter = *(cmdstr_ptr++);
250 /* save the match string */
251 idx = index_of_next_unescaped_regexp_delim(delimiter, cmdstr_ptr);
253 bb_error_msg_and_die(bad_format_in_subst);
255 *match = copy_parsing_escapes(cmdstr_ptr, idx);
257 /* save the replacement string */
258 cmdstr_ptr += idx + 1;
259 idx = index_of_next_unescaped_regexp_delim(delimiter, cmdstr_ptr);
261 bb_error_msg_and_die(bad_format_in_subst);
263 *replace = copy_parsing_escapes(cmdstr_ptr, idx);
265 return ((cmdstr_ptr - cmdstr) + idx);
269 * returns the index in the string just past where the address ends.
271 static int get_address(char *my_str, int *linenum, regex_t ** regex)
275 if (isdigit(*my_str)) {
276 *linenum = strtol(my_str, &pos, 10);
277 /* endstr shouldnt ever equal NULL */
278 } else if (*my_str == '$') {
281 } else if (*my_str == '/' || *my_str == '\\') {
286 if (*my_str == '\\') delimiter = *(++pos);
287 else delimiter = '/';
288 next = index_of_next_unescaped_regexp_delim(delimiter, ++pos);
290 bb_error_msg_and_die("unterminated match expression");
292 temp=copy_parsing_escapes(pos,next);
293 *regex = (regex_t *) xmalloc(sizeof(regex_t));
294 xregcomp(*regex, temp, regex_type|REG_NEWLINE);
296 /* Move position to next character after last delimiter */
302 /* Grab a filename. Whitespace at start is skipped, then goes to EOL. */
303 static int parse_file_cmd(sed_cmd_t * sed_cmd, const char *filecmdstr, char **retval)
305 int start = 0, idx, hack=0;
307 /* Skip whitespace, then grab filename to end of line */
308 while (isspace(filecmdstr[start])) start++;
310 while(filecmdstr[idx] && filecmdstr[idx]!='\n') idx++;
311 /* If lines glued together, put backslash back. */
312 if(filecmdstr[idx]=='\n') hack=1;
313 if(idx==start) bb_error_msg_and_die("Empty filename");
314 *retval = bb_xstrndup(filecmdstr+start, idx-start+hack+1);
315 if(hack) *(idx+*retval)='\\';
320 static int parse_subst_cmd(sed_cmd_t * const sed_cmd, char *substr)
322 int cflags = regex_type;
327 * A substitution command should look something like this:
328 * s/match/replace/ #gIpw
332 idx = parse_regex_delim(substr, &match, &sed_cmd->string);
334 /* determine the number of back references in the match string */
335 /* Note: we compute this here rather than in the do_subst_command()
336 * function to save processor time, at the expense of a little more memory
337 * (4 bits) per sed_cmd */
339 /* process the flags */
341 sed_cmd->which_match=1;
342 while (substr[++idx]) {
343 /* Parse match number */
344 if(isdigit(substr[idx])) {
346 /* Match 0 treated as all, multiple matches we take the last one. */
347 char *pos=substr+idx;
348 sed_cmd->which_match=(unsigned short)strtol(substr+idx,&pos,10);
354 if(isspace(substr[idx])) continue;
356 switch (substr[idx]) {
357 /* Replace all occurrences */
359 if (match[0] != '^') sed_cmd->which_match = 0;
361 /* Print pattern space */
369 idx+=parse_file_cmd(sed_cmd,substr+idx,&temp);
373 /* Ignore case (gnu exension) */
379 while(substr[++idx]);
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");
414 if(*cmdstr=='\n' || *cmdstr=='\\') {
417 } else if(isspace(*cmdstr)) cmdstr++;
420 sed_cmd->string = bb_xstrdup(cmdstr);
421 parse_escapes(sed_cmd->string,sed_cmd->string,strlen(cmdstr),0,0);
422 cmdstr += strlen(cmdstr);
423 /* handle file cmds: (r)ead */
424 } else if(strchr("rw", sed_cmd->cmd)) {
425 if (sed_cmd->end_line || sed_cmd->end_match)
426 bb_error_msg_and_die("Command only uses one address");
427 cmdstr += parse_file_cmd(sed_cmd, cmdstr, &sed_cmd->string);
428 if(sed_cmd->cmd=='w')
429 sed_cmd->file=bb_xfopen(sed_cmd->string,"w");
430 /* handle branch commands */
431 } else if (strchr(":btT", sed_cmd->cmd)) {
434 while(isspace(*cmdstr)) cmdstr++;
435 length = strcspn(cmdstr, semicolon_whitespace);
437 sed_cmd->string = bb_xstrndup(cmdstr, length);
441 /* translation command */
442 else if (sed_cmd->cmd == 'y') {
443 char *match, *replace;
446 cmdstr+=parse_regex_delim(cmdstr, &match, &replace)+1;
447 /* \n already parsed, but \delimiter needs unescaping. */
448 parse_escapes(match,match,strlen(match),i,i);
449 parse_escapes(replace,replace,strlen(replace),i,i);
451 sed_cmd->string = xcalloc(1, (strlen(match) + 1) * 2);
452 for (i = 0; match[i] && replace[i]; i++) {
453 sed_cmd->string[i * 2] = match[i];
454 sed_cmd->string[(i * 2) + 1] = replace[i];
459 /* if it wasnt a single-letter command that takes no arguments
460 * then it must be an invalid command.
462 else if (strchr("dDgGhHlnNpPqx={}", sed_cmd->cmd) == 0) {
463 bb_error_msg_and_die("Unsupported command %c", sed_cmd->cmd);
466 /* give back whatever's left over */
471 /* Parse address+command sets, skipping comment lines. */
473 static void add_cmd(char *cmdstr)
475 static char *add_cmd_line=NULL;
479 /* Append this line to any unfinished line from last time. */
481 int lastlen=strlen(add_cmd_line);
482 char *tmp=xmalloc(lastlen+strlen(cmdstr)+2);
484 memcpy(tmp,add_cmd_line,lastlen);
486 strcpy(tmp+lastlen+1,cmdstr);
488 cmdstr=add_cmd_line=tmp;
489 } else add_cmd_line=NULL;
491 /* If this line ends with backslash, request next line. */
493 if(temp && cmdstr[temp-1]=='\\') {
494 if(!add_cmd_line) add_cmd_line=strdup(cmdstr);
495 add_cmd_line[temp-1]=0;
499 /* Loop parsing all commands in this line. */
501 /* Skip leading whitespace and semicolons */
502 cmdstr += strspn(cmdstr, semicolon_whitespace);
504 /* If no more commands, exit. */
507 /* if this is a comment, jump past it and keep going */
508 if (*cmdstr == '#') {
509 /* "#n" is the same as using -n on the command line */
510 if (cmdstr[1] == 'n') be_quiet++;
511 if(!(cmdstr=strpbrk(cmdstr, "\n\r"))) break;
516 * format is: [addr][,addr][!]cmd
521 sed_cmd = xcalloc(1, sizeof(sed_cmd_t));
523 /* first part (if present) is an address: either a '$', a number or a /regex/ */
524 cmdstr += get_address(cmdstr, &sed_cmd->beg_line, &sed_cmd->beg_match);
526 /* second part (if present) will begin with a comma */
527 if (*cmdstr == ',') {
531 idx = get_address(cmdstr, &sed_cmd->end_line, &sed_cmd->end_match);
532 if (!idx) bb_error_msg_and_die("get_address: no address found in string\n");
536 /* skip whitespace before the command */
537 while (isspace(*cmdstr)) cmdstr++;
539 /* Check for inversion flag */
540 if (*cmdstr == '!') {
544 /* skip whitespace before the command */
545 while (isspace(*cmdstr)) cmdstr++;
548 /* last part (mandatory) will be a command */
549 if (!*cmdstr) bb_error_msg_and_die("missing command");
550 sed_cmd->cmd = *(cmdstr++);
551 cmdstr = parse_cmd_args(sed_cmd, cmdstr);
553 /* Add the command to the command array */
554 sed_cmd_tail->next = sed_cmd;
555 sed_cmd_tail = sed_cmd_tail->next;
558 /* If we glued multiple lines together, free the memory. */
563 /* Append to a string, reallocating memory as necessary. */
565 static struct pipeline {
566 char *buf; /* Space to hold string */
567 int idx; /* Space used */
568 int len; /* Space allocated */
573 static void pipe_putc(char c)
575 if(pipeline.idx==pipeline.len) {
576 pipeline.buf = xrealloc(pipeline.buf, pipeline.len + PIPE_GROW);
577 pipeline.len+=PIPE_GROW;
579 pipeline.buf[pipeline.idx++] = (c);
582 static void do_subst_w_backrefs(const char *line, const char *replace)
586 /* go through the replacement string */
587 for (i = 0; replace[i]; i++) {
588 /* if we find a backreference (\1, \2, etc.) print the backref'ed * text */
589 if (replace[i] == '\\' && replace[i+1]>='0' && replace[i+1]<='9') {
590 int backref=replace[++i]-'0';
592 /* print out the text held in regmatch[backref] */
593 if(regmatch[backref].rm_so != -1)
594 for (j = regmatch[backref].rm_so; j < regmatch[backref].rm_eo; j++)
598 /* if we find a backslash escaped character, print the character */
599 else if (replace[i] == '\\') pipe_putc(replace[++i]);
601 /* if we find an unescaped '&' print out the whole matched text. */
602 else if (replace[i] == '&')
603 for (j = regmatch[0].rm_so; j < regmatch[0].rm_eo; j++)
605 /* Otherwise just output the character. */
606 else pipe_putc(replace[i]);
610 static int do_subst_command(sed_cmd_t * sed_cmd, char **line)
612 char *oldline = *line;
615 regex_t *current_regex;
617 /* Handle empty regex. */
618 if (sed_cmd->sub_match == NULL) {
619 current_regex = previous_regex_ptr;
621 bb_error_msg_and_die("No previous regexp.");
622 } else previous_regex_ptr = current_regex = sed_cmd->sub_match;
624 /* Find the first match */
625 if(REG_NOMATCH==regexec(current_regex, oldline, 10, regmatch, 0))
628 /* Initialize temporary output buffer. */
629 pipeline.buf=xmalloc(PIPE_GROW);
630 pipeline.len=PIPE_GROW;
633 /* Now loop through, substituting for matches */
637 /* Work around bug in glibc regexec, demonstrated by:
638 echo " a.b" | busybox sed 's [^ .]* x g'
639 The match_count check is so not to break
640 echo "hi" | busybox sed 's/^/!/g' */
641 if(!regmatch[0].rm_so && !regmatch[0].rm_eo && match_count) {
642 pipe_putc(*(oldline++));
648 /* If we aren't interested in this match, output old line to
649 end of match and continue */
650 if(sed_cmd->which_match && sed_cmd->which_match!=match_count) {
651 for(i=0;i<regmatch[0].rm_eo;i++)
652 pipe_putc(oldline[i]);
656 /* print everything before the match */
657 for (i = 0; i < regmatch[0].rm_so; i++) pipe_putc(oldline[i]);
659 /* then print the substitution string */
660 do_subst_w_backrefs(oldline, sed_cmd->string);
662 /* advance past the match */
663 oldline += regmatch[0].rm_eo;
664 /* flag that something has changed */
667 /* if we're not doing this globally, get out now */
668 if (sed_cmd->which_match) break;
669 } while (*oldline && (regexec(current_regex, oldline, 10, regmatch, 0) != REG_NOMATCH));
671 /* Copy rest of string into output pipeline */
673 while(*oldline) pipe_putc(*(oldline++));
677 *line = pipeline.buf;
681 /* Set command pointer to point to this label. (Does not handle null label.) */
682 static sed_cmd_t *branch_to(const char *label)
686 for (sed_cmd = sed_cmd_head.next; sed_cmd; sed_cmd = sed_cmd->next) {
687 if ((sed_cmd->cmd == ':') && (sed_cmd->string) && (strcmp(sed_cmd->string, label) == 0)) {
691 bb_error_msg_and_die("Can't find label for jump to `%s'", label);
694 /* Append copy of string to append buffer */
695 static void append(char *s)
697 struct append_list *temp=calloc(1,sizeof(struct append_list));
700 append_tail=(append_tail->next=temp);
701 else append_head=append_tail=temp;
702 temp->string=strdup(s);
705 static void flush_append(void)
707 /* Output appended lines. */
709 fprintf(nonstdout,"%s\n",append_head->string);
710 append_tail=append_head->next;
711 free(append_head->string);
713 append_head=append_tail;
715 append_head=append_tail=NULL;
718 static void add_input_file(FILE *file)
720 input_file_list=xrealloc(input_file_list,(input_file_count+1)*sizeof(FILE *));
721 input_file_list[input_file_count++]=file;
724 /* Get next line of input from input_file_list, flushing append buffer and
725 * noting if we ran out of files without a newline on the last line we read.
727 static char *get_next_line(int *no_newline)
733 while (current_input_file<input_file_count) {
734 temp = bb_get_chunk_from_file(input_file_list[current_input_file],&len);
736 *no_newline = !(len && temp[len-1]=='\n');
737 if (!*no_newline) temp[len-1] = 0;
739 // Close this file and advance to next one
740 } else fclose(input_file_list[current_input_file++]);
746 /* Output line of text. missing_newline means the last line output did not
747 end with a newline. no_newline means this line does not end with a
750 static int puts_maybe_newline(char *s, FILE *file, int missing_newline, int no_newline)
752 if(missing_newline) fputc('\n',file);
754 if(!no_newline) fputc('\n',file);
757 fprintf(stderr,"Write failed.\n");
758 exit(4); /* It's what gnu sed exits with... */
764 #define sed_puts(s,n) missing_newline=puts_maybe_newline(s,nonstdout,missing_newline,n)
766 /* Process all the lines in all the files */
768 static void process_files(void)
770 char *pattern_space, *next_line;
771 int linenum = 0, missing_newline=0;
772 int no_newline,next_no_newline=0;
775 next_line = get_next_line(&next_no_newline);
777 /* go through every line in each file */
782 /* Advance to next line. Stop if out of lines. */
783 if(!(pattern_space=next_line)) break;
784 no_newline=next_no_newline;
786 /* Read one line in advance so we can act on the last line,
788 next_line = get_next_line(&next_no_newline);
791 /* for every line, go through all the commands */
792 for (sed_cmd = sed_cmd_head.next; sed_cmd; sed_cmd = sed_cmd->next) {
793 int old_matched, matched;
795 old_matched = sed_cmd->in_match;
797 /* Determine if this command matches this line: */
799 /* Are we continuing a previous multi-line match? */
801 sed_cmd->in_match = sed_cmd->in_match
803 /* Or is no range necessary? */
804 || (!sed_cmd->beg_line && !sed_cmd->end_line
805 && !sed_cmd->beg_match && !sed_cmd->end_match)
807 /* Or did we match the start of a numerical range? */
808 || (sed_cmd->beg_line > 0 && (sed_cmd->beg_line == linenum))
810 /* Or does this line match our begin address regex? */
811 || (sed_cmd->beg_match &&
812 !regexec(sed_cmd->beg_match, pattern_space, 0, NULL, 0))
814 /* Or did we match last line of input? */
815 || (sed_cmd->beg_line == -1 && next_line == NULL);
817 /* Snapshot the value */
819 matched = sed_cmd->in_match;
821 /* Is this line the end of the current match? */
824 sed_cmd->in_match = !(
825 /* has the ending line come, or is this a single address command? */
827 sed_cmd->end_line==-1 ?
829 : sed_cmd->end_line<=linenum
830 : !sed_cmd->end_match)
831 /* or does this line matches our last address regex */
832 || (sed_cmd->end_match && old_matched && (regexec(sed_cmd->end_match, pattern_space, 0, NULL, 0) == 0))
836 /* Skip blocks of commands we didn't match. */
837 if (sed_cmd->cmd == '{') {
838 if(sed_cmd->invert ? matched : !matched)
839 while(sed_cmd && sed_cmd->cmd!='}') sed_cmd=sed_cmd->next;
840 if(!sed_cmd) bb_error_msg_and_die("Unterminated {");
844 /* Okay, so did this line match? */
845 if (sed_cmd->invert ? !matched : matched) {
846 /* Update last used regex in case a blank substitute BRE is found */
847 if (sed_cmd->beg_match) {
848 previous_regex_ptr = sed_cmd->beg_match;
852 switch (sed_cmd->cmd) {
854 /* Print line number */
856 fprintf(nonstdout,"%d\n", linenum);
859 /* Write the current pattern space up to the first newline */
862 char *tmp = strchr(pattern_space, '\n');
866 sed_puts(pattern_space,1);
873 /* Write the current pattern space to output */
875 sed_puts(pattern_space,no_newline);
877 /* Delete up through first newline */
880 char *tmp = strchr(pattern_space,'\n');
883 tmp=bb_xstrdup(tmp+1);
889 /* discard this line. */
893 /* Substitute with regex */
895 if(do_subst_command(sed_cmd, &pattern_space)) {
898 /* handle p option */
900 sed_puts(pattern_space,no_newline);
901 /* handle w option */
903 sed_cmd->no_newline=puts_maybe_newline(pattern_space, sed_cmd->file, sed_cmd->no_newline, no_newline);
908 /* Append line to linked list to be printed later */
911 append(sed_cmd->string);
915 /* Insert text before this line */
917 sed_puts(sed_cmd->string,1);
920 /* Cut and paste text (replace) */
922 /* Only triggers on last line of a matching range. */
923 if (!sed_cmd->in_match) sed_puts(sed_cmd->string,0);
926 /* Read file, append contents to output */
931 rfile = fopen(sed_cmd->string, "r");
935 while ((line = bb_get_chomped_line_from_file(rfile))
938 bb_xprint_and_close_file(rfile);
944 /* Write pattern space to file. */
946 sed_cmd->no_newline=puts_maybe_newline(pattern_space,sed_cmd->file, sed_cmd->no_newline,no_newline);
949 /* Read next line from input */
952 sed_puts(pattern_space,no_newline);
955 pattern_space = next_line;
956 no_newline=next_no_newline;
957 next_line = get_next_line(&next_no_newline);
963 /* Quit. End of script, end of input. */
965 /* Exit the outer while loop */
968 goto discard_commands;
970 /* Append the next line to the current line */
973 /* If no next line, jump to end of script and exit. */
974 if (next_line == NULL) {
975 /* Jump to end of script and exit */
979 /* append next_line, read new next_line. */
981 int len=strlen(pattern_space);
983 pattern_space = realloc(pattern_space, len + strlen(next_line) + 2);
984 pattern_space[len]='\n';
985 strcpy(pattern_space+len+1, next_line);
986 no_newline=next_no_newline;
987 next_line = get_next_line(&next_no_newline);
993 /* Test/branch if substitution occurred */
995 if(!substituted) break;
998 /* Test/branch if substitution didn't occur */
1000 if (substituted) break;
1002 /* Branch to label */
1004 if (!sed_cmd->string) goto discard_commands;
1005 else sed_cmd = branch_to(sed_cmd->string);
1007 /* Transliterate characters */
1012 for (i = 0; pattern_space[i]; i++) {
1015 for (j = 0; sed_cmd->string[j]; j += 2) {
1016 if (pattern_space[i] == sed_cmd->string[j]) {
1017 pattern_space[i] = sed_cmd->string[j + 1];
1025 case 'g': /* Replace pattern space with hold space */
1026 free(pattern_space);
1027 pattern_space = strdup(hold_space ? hold_space : "");
1029 case 'G': /* Append newline and hold space to pattern space */
1031 int pattern_space_size = 2;
1032 int hold_space_size = 0;
1035 pattern_space_size += strlen(pattern_space);
1036 if (hold_space) hold_space_size = strlen(hold_space);
1037 pattern_space = xrealloc(pattern_space, pattern_space_size + hold_space_size);
1038 if (pattern_space_size == 2) pattern_space[0]=0;
1039 strcat(pattern_space, "\n");
1040 if (hold_space) strcat(pattern_space, hold_space);
1045 case 'h': /* Replace hold space with pattern space */
1047 hold_space = strdup(pattern_space);
1049 case 'H': /* Append newline and pattern space to hold space */
1051 int hold_space_size = 2;
1052 int pattern_space_size = 0;
1054 if (hold_space) hold_space_size += strlen(hold_space);
1056 pattern_space_size = strlen(pattern_space);
1057 hold_space = xrealloc(hold_space,
1058 hold_space_size + pattern_space_size);
1060 if (hold_space_size == 2) hold_space[0]=0;
1061 strcat(hold_space, "\n");
1062 if (pattern_space) strcat(hold_space, pattern_space);
1066 case 'x': /* Exchange hold and pattern space */
1068 char *tmp = pattern_space;
1069 pattern_space = hold_space;
1079 * exit point from sedding...
1082 /* we will print the line unless we were told to be quiet ('-n')
1083 or if the line was suppressed (ala 'd'elete) */
1084 if (!be_quiet) sed_puts(pattern_space,no_newline);
1086 /* Delete and such jump here. */
1089 free(pattern_space);
1093 /* It is possible to have a command line argument with embedded
1094 newlines. This counts as multiple command lines. */
1096 static void add_cmd_block(char *cmdstr)
1099 char *temp=bb_xstrdup(cmdstr),*temp2=temp;
1102 int len=strcspn(temp2,"\n");
1103 if(!temp2[len]) go=0;
1111 int sed_main(int argc, char **argv)
1113 int status = EXIT_SUCCESS, opt, getpat = 1;
1115 /* destroy command strings on exit */
1116 if (ENABLE_FEATURE_CLEAN_UP && atexit(sed_free_and_close_stuff) == -1)
1117 bb_perror_msg_and_die("atexit");
1119 /* Lie to autoconf when it starts asking stupid questions. */
1120 if(argc==2 && !strcmp(argv[1],"--version")) {
1121 printf("This is not GNU sed version 4.0\n");
1125 /* do normal option parsing */
1126 while ((opt = getopt(argc, argv, "irne:f:")) > 0) {
1130 atexit(cleanup_outname);
1133 regex_type|=REG_EXTENDED;
1139 add_cmd_block(optarg);
1147 cmdfile = bb_xfopen(optarg, "r");
1149 while ((line = bb_get_chomped_line_from_file(cmdfile)) != NULL) {
1154 bb_xprint_and_close_file(cmdfile);
1163 /* if we didn't get a pattern from -e or -f, use argv[optind] */
1165 if (argv[optind] == NULL)
1168 add_cmd_block(argv[optind++]);
1170 /* Flush any unfinished commands. */
1173 /* By default, we write to stdout */
1176 /* argv[(optind)..(argc-1)] should be names of file to process. If no
1177 * files were specified or '-' was specified, take input from stdin.
1178 * Otherwise, we process all the files specified. */
1179 if (argv[optind] == NULL) {
1180 if(in_place) bb_error_msg_and_die("Filename required for -i");
1181 add_input_file(stdin);
1187 for (i = optind; i < argc; i++) {
1188 if(!strcmp(argv[i], "-") && !in_place) {
1189 add_input_file(stdin);
1192 file = bb_wfopen(argv[i], "r");
1195 struct stat statbuf;
1198 outname=bb_xstrndup(argv[i],strlen(argv[i])+6);
1199 strcat(outname,"XXXXXX");
1200 if(-1==(nonstdoutfd=mkstemp(outname)))
1201 bb_error_msg_and_die("no temp file");
1202 nonstdout=fdopen(nonstdoutfd,"w");
1204 /* Set permissions of output file */
1206 fstat(fileno(file),&statbuf);
1207 fchmod(nonstdoutfd,statbuf.st_mode);
1208 add_input_file(file);
1214 rename(outname,argv[i]);
1217 } else add_input_file(file);
1219 status = EXIT_FAILURE;
1223 if(input_file_count>current_input_file) process_files();