2 * sed.c - very minimalist version of sed
4 * Copyright (C) 1999,2000,2001 by Lineo, inc. and Mark Whitley
5 * Copyright (C) 1999,2000,2001 by Mark Whitley <markw@codepoet.org>
6 * Copyright (C) 2002 Matt Kraai
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 Supported features and commands in this version of sed:
28 - address matching: num|/matchstr/[,num|/matchstr/|$]command
29 - commands: (p)rint, (d)elete, (s)ubstitue (with g & I flags)
30 - edit commands: (a)ppend, (i)nsert, (c)hange
31 - file commands: (r)ead
32 - backreferences in substitution expressions (\1, \2...\9)
33 - grouped commands: {cmd1;cmd2}
35 (Note: Specifying an address (range) to match is *optional*; commands
36 default to the whole pattern space if no specific address match was
41 - transliteration (y/source-chars/dest-chars/) (use 'tr')
42 - no pattern space hold space storing / swapping (x, etc.)
43 - no labels / branching (: label, b, t, and friends)
44 - and lots, lots more.
46 Reference http://www.opengroup.org/onlinepubs/007904975/utilities/sed.html
50 #include <unistd.h> /* for getopt() */
52 #include <string.h> /* for strdup() */
54 #include <ctype.h> /* for isspace() */
58 /* the spec says label must be at least 8 chars, behavious is unspecified if more than 8 chars */
59 #define SED_LABEL_LENGTH 8
62 extern void xregcomp(regex_t *preg, const char *regex, int cflags);
63 extern int optind; /* in unistd.h */
64 extern char *optarg; /* ditto */
67 static int be_quiet = 0;
70 typedef struct sed_cmd_s {
71 /* Order by alignment requirements */
74 regex_t *beg_match; /* sed -e '/match/cmd' */
75 regex_t *end_match; /* sed -e '/match/,/end_match/cmd' */
77 /* SUBSTITUTION COMMAND SPECIFIC FIELDS */
79 /* sed -e 's/sub_match/replace/' */
83 /* EDIT COMMAND (a,i,c) SPECIFIC FIELDS */
86 /* FILE COMMAND (r) SPECIFIC FIELDS */
90 int beg_line; /* 'sed 1p' 0 == no begining line, apply commands to all lines */
91 int end_line; /* 'sed 1,3p' 0 == no end line, use only beginning. -1 == $ */
92 /* SUBSTITUTION COMMAND SPECIFIC FIELDS */
94 unsigned int num_backrefs:4; /* how many back references (\1..\9) */
95 /* Note: GNU/POSIX sed does not save more than nine backrefs, so
96 * we only use 4 bits to hold the number */
97 unsigned int sub_g:1; /* sed -e 's/foo/bar/g' (global) */
98 unsigned int sub_p:2; /* sed -e 's/foo/bar/p' (print substitution) */
101 char delimiter; /* The delimiter used to separate regexps */
104 char cmd; /* p,d,s (add more at your leisure :-) */
107 int invert; /* the '!' after the address */
109 /* Branch commands */
110 char label[SED_LABEL_LENGTH + 1];
112 /* next command in list (sequential list of specified commands) */
113 struct sed_cmd_s *linear;
118 /* linked list of sed commands */
119 static sed_cmd_t sed_cmd_head;
120 static sed_cmd_t *sed_cmd_tail = &sed_cmd_head;
122 const char * const semicolon_whitespace = "; \n\r\t\v\0";
124 #ifdef CONFIG_FEATURE_CLEAN_UP
125 static void destroy_cmd_strs(void)
127 sed_cmd_t *sed_cmd = sed_cmd_head.linear;
130 sed_cmd_t *sed_cmd_next = sed_cmd->linear;
132 if (sed_cmd->beg_match) {
133 regfree(sed_cmd->beg_match);
134 free(sed_cmd->beg_match);
136 if (sed_cmd->end_match) {
137 regfree(sed_cmd->end_match);
138 free(sed_cmd->end_match);
140 if (sed_cmd->sub_match) {
141 regfree(sed_cmd->sub_match);
142 free(sed_cmd->sub_match);
144 free(sed_cmd->replace);
146 sed_cmd = sed_cmd_next;
153 * index_of_next_unescaped_regexp_delim - walks left to right through a string
154 * beginning at a specified index and returns the index of the next regular
155 * expression delimiter (typically a forward * slash ('/')) not preceeded by
158 static int index_of_next_unescaped_regexp_delim(const char delimiter, const char *str, int idx)
164 for ( ; (ch = str[idx]); idx++) {
166 if (ch == ']' && !(bracket == idx - 1 ||
167 (bracket == idx - 2 && str[idx-1] == '^')))
175 else if (ch == delimiter)
179 /* if we make it to here, we've hit the end of the string */
184 * returns the index in the string just past where the address ends.
186 static int get_address(char *delimiter, char *my_str, int *linenum, regex_t **regex)
189 if (isdigit(my_str[idx])) {
191 *linenum = strtol(my_str, &endstr, 10);
192 /* endstr shouldnt ever equal NULL */
193 idx = endstr - my_str;
195 else if (my_str[idx] == '$') {
199 else if (my_str[idx] == '/' || my_str[idx] == '\\') {
203 if (my_str[idx] == '\\') {
205 *delimiter = my_str[++idx];
207 idx = index_of_next_unescaped_regexp_delim(*delimiter, my_str, ++idx);
209 bb_error_msg_and_die("unterminated match expression");
212 *regex = (regex_t *)xmalloc(sizeof(regex_t));
213 xregcomp(*regex, my_str+idx_start, REG_NEWLINE);
214 idx++; /* so it points to the next character after the last '/' */
219 static int parse_subst_cmd(sed_cmd_t * const sed_cmd, const char *substr)
228 * the string that gets passed to this function should look like this:
229 * s/match/replace/gIp
233 * (all three of the '/' slashes are mandatory)
236 /* verify that the 's' is followed by something. That something
237 * (typically a 'slash') is now our regexp delimiter... */
238 if (substr[idx] == '\0')
239 bb_error_msg_and_die("bad format in substitution expression");
241 sed_cmd->delimiter=substr[idx];
243 /* save the match string */
245 idx = index_of_next_unescaped_regexp_delim(sed_cmd->delimiter, substr, ++idx);
247 bb_error_msg_and_die("bad format in substitution expression");
248 match = bb_xstrndup(substr + oldidx, idx - oldidx);
250 /* determine the number of back references in the match string */
251 /* Note: we compute this here rather than in the do_subst_command()
252 * function to save processor time, at the expense of a little more memory
253 * (4 bits) per sed_cmd */
255 /* sed_cmd->num_backrefs = 0; */ /* XXX: not needed? --apparently not */
256 for (j = 0; match[j]; j++) {
257 /* GNU/POSIX sed does not save more than nine backrefs */
258 if (match[j] == '\\' && match[j+1] == '(' && sed_cmd->num_backrefs <= 9)
259 sed_cmd->num_backrefs++;
262 /* save the replacement string */
264 idx = index_of_next_unescaped_regexp_delim(sed_cmd->delimiter, substr, ++idx);
266 bb_error_msg_and_die("bad format in substitution expression");
267 sed_cmd->replace = bb_xstrndup(substr + oldidx, idx - oldidx);
269 /* process the flags */
270 while (substr[++idx]) {
271 switch (substr[idx]) {
275 /* Hmm, i dont see the I option mentioned in the standard */
283 /* any whitespace or semicolon trailing after a s/// is ok */
284 if (strchr(semicolon_whitespace, substr[idx]))
287 bb_error_msg_and_die("bad option in substitution expression");
292 /* compile the match string into a regex */
293 sed_cmd->sub_match = (regex_t *)xmalloc(sizeof(regex_t));
294 xregcomp(sed_cmd->sub_match, match, cflags);
300 static int parse_edit_cmd(sed_cmd_t *sed_cmd, const char *editstr)
305 * the string that gets passed to this function should look like this:
309 * | this backslash (immediately following the edit command) is mandatory
316 * as soon as we hit a TEXT line that has no trailing '\', we're done.
317 * this means a command like:
325 if ((*editstr != '\\') || ((editstr[1] != '\n') && (editstr[1] != '\r'))) {
326 bb_error_msg_and_die("bad format in edit expression");
329 /* store the edit line text */
330 sed_cmd->editline = xmalloc(strlen(&editstr[2]) + 2);
331 for (i = 2, j = 0; editstr[i] != '\0' && strchr("\r\n", editstr[i]) == NULL;
333 if ((editstr[i] == '\\') && strchr("\n\r", editstr[i+1]) != NULL) {
334 sed_cmd->editline[j] = '\n';
337 sed_cmd->editline[j] = editstr[i];
340 /* figure out if we need to add a newline */
341 if (sed_cmd->editline[j-1] != '\n')
342 sed_cmd->editline[j++] = '\n';
344 /* terminate string */
345 sed_cmd->editline[j] = '\0';
351 static int parse_file_cmd(sed_cmd_t *sed_cmd, const char *filecmdstr)
357 * the string that gets passed to this function should look like this:
362 * optional whitespace
364 * re: the file to be read, the GNU manual says the following: "Note that
365 * if filename cannot be read, it is treated as if it were an empty file,
366 * without any error indication." Thus, all of the following commands are
369 * sed -e '1r noexist'
374 /* the file command may be followed by whitespace; move past it. */
375 while (isspace(filecmdstr[++idx]))
378 /* the first non-whitespace we get is a filename. the filename ends when we
379 * hit a normal sed command terminator or end of string */
380 filenamelen = strcspn(&filecmdstr[idx], semicolon_whitespace);
381 sed_cmd->filename = xmalloc(filenamelen + 1);
382 safe_strncpy(sed_cmd->filename, &filecmdstr[idx], filenamelen + 1);
384 return idx + filenamelen;
388 * Process the commands arguments
390 static char *parse_cmd_str(sed_cmd_t * const sed_cmd, char *cmdstr)
392 /* handle (s)ubstitution command */
393 if (sed_cmd->cmd == 's') {
394 cmdstr += parse_subst_cmd(sed_cmd, cmdstr);
396 /* handle edit cmds: (a)ppend, (i)nsert, and (c)hange */
397 else if (strchr("aic", sed_cmd->cmd)) {
398 if ((sed_cmd->end_line || sed_cmd->end_match) && sed_cmd->cmd != 'c')
399 bb_error_msg_and_die("only a beginning address can be specified for edit commands");
400 cmdstr += parse_edit_cmd(sed_cmd, cmdstr);
402 /* handle file cmds: (r)ead */
403 else if (sed_cmd->cmd == 'r') {
404 if (sed_cmd->end_line || sed_cmd->end_match)
405 bb_error_msg_and_die("Command only uses one address");
406 cmdstr += parse_file_cmd(sed_cmd, cmdstr);
408 /* handle branch commands */
409 else if (strchr(":bt", sed_cmd->cmd)) {
412 cmdstr += strspn(cmdstr, " ");
413 length = strcspn(cmdstr, "; ");
414 if (length > SED_LABEL_LENGTH) {
415 length = SED_LABEL_LENGTH;
417 strncpy(sed_cmd->label, cmdstr, length);
420 /* if it wasnt a single-letter command that takes no arguments
421 * then it must be an invalid command.
423 else if (strchr("nNpPqd=", sed_cmd->cmd) == 0) {
424 bb_error_msg_and_die("Unsupported command %c", sed_cmd->cmd);
427 /* give back whatever's left over */
431 static char *add_cmd(sed_cmd_t *sed_cmd, char *cmdstr)
434 /* Skip over leading whitespace and semicolons */
435 cmdstr += strspn(cmdstr, semicolon_whitespace);
437 /* if we ate the whole thing, that means there was just trailing
438 * whitespace or a final / no-op semicolon. either way, get out */
439 if (*cmdstr == '\0') {
443 /* if this is a comment, jump past it and keep going */
444 if (*cmdstr == '#') {
445 return(strpbrk(cmdstr, "\n\r"));
449 * format is: [addr][,addr]cmd
454 /* first part (if present) is an address: either a '$', a number or a /regex/ */
455 cmdstr += get_address(&(sed_cmd->delimiter), cmdstr, &sed_cmd->beg_line, &sed_cmd->beg_match);
457 /* second part (if present) will begin with a comma */
458 if (*cmdstr == ',') {
461 idx = get_address(&(sed_cmd->delimiter), cmdstr, &sed_cmd->end_line, &sed_cmd->end_match);
463 bb_error_msg_and_die("get_address: no address found in string\n"
464 "\t(you probably didn't check the string you passed me)");
469 /* skip whitespace before the command */
470 while (isspace(*cmdstr)) {
474 /* there my be the inversion flag between part2 and part3 */
475 if (*cmdstr == '!') {
479 #ifdef SED_FEATURE_STRICT_CHECKING
480 /* According to the spec
481 * It is unspecified whether <blank>s can follow a '!' character,
482 * and conforming applications shall not follow a '!' character
485 if (isblank(cmdstr[idx]) {
486 bb_error_msg_and_die("blank follows '!'");
489 /* skip whitespace before the command */
490 while (isspace(*cmdstr)) {
497 /* last part (mandatory) will be a command */
499 bb_error_msg_and_die("missing command");
501 sed_cmd->cmd = *cmdstr;
504 if (sed_cmd->cmd == '{') {
506 sed_cmd_t *sed_cmd_new;
507 char *end_ptr = strpbrk(cmdstr, ";}");
510 sed_cmd_new = xcalloc(1, sizeof(sed_cmd_t));
511 sed_cmd_new->beg_match = sed_cmd->beg_match;
512 sed_cmd_new->end_match = sed_cmd->end_match;
513 sed_cmd_new->beg_line = sed_cmd->beg_line;
514 sed_cmd_new->end_line = sed_cmd->end_line;
515 sed_cmd_new->invert = sed_cmd->invert;
517 add_cmd(sed_cmd_new, cmdstr);
518 cmdstr = end_ptr + 1;
519 } while (*cmdstr != '\0');
521 cmdstr = parse_cmd_str(sed_cmd, cmdstr);
523 /* Add the command to the command array */
524 sed_cmd_tail->linear = sed_cmd;
525 sed_cmd_tail = sed_cmd_tail->linear;
530 static void add_cmd_str(char *cmdstr)
534 sed_cmd = xcalloc(1, sizeof(sed_cmd_t));
535 cmdstr = add_cmd(sed_cmd, cmdstr);
536 } while (cmdstr && strlen(cmdstr));
540 static void load_cmd_file(char *filename)
547 cmdfile = bb_xfopen(filename, "r");
549 while ((line = bb_get_line_from_file(cmdfile)) != NULL) {
550 /* if a line ends with '\' it needs the next line appended to it */
551 while (((e = last_char_is(line, '\n')) != NULL)
552 && (e > line) && (e[-1] == '\\')
553 && ((nextline = bb_get_line_from_file(cmdfile)) != NULL)) {
554 line = xrealloc(line, (e - line) + 1 + strlen(nextline) + 1);
555 strcat(line, nextline);
558 /* eat trailing newline (if any) --if I don't do this, edit commands
559 * (aic) will print an extra newline */
572 #define PIPE_MAGIC 0x7f
575 void pipe_putc(struct pipeline *const pipeline, char c)
577 if (pipeline->buf[pipeline->idx] == PIPE_MAGIC) {
579 xrealloc(pipeline->buf, pipeline->len + PIPE_GROW);
580 memset(pipeline->buf + pipeline->len, 0, PIPE_GROW);
581 pipeline->len += PIPE_GROW;
582 pipeline->buf[pipeline->len - 1] = PIPE_MAGIC;
584 pipeline->buf[pipeline->idx++] = (c);
587 #define pipeputc(c) pipe_putc(pipeline, c)
590 { if (pipeline[pipeline_idx] == PIPE_MAGIC) { \
591 pipeline = xrealloc(pipeline, pipeline_len+PIPE_GROW); \
592 memset(pipeline+pipeline_len, 0, PIPE_GROW); \
593 pipeline_len += PIPE_GROW; \
594 pipeline[pipeline_len-1] = PIPE_MAGIC; } \
595 pipeline[pipeline_idx++] = (c); }
598 static void print_subst_w_backrefs(const char *line, const char *replace,
599 regmatch_t *regmatch, struct pipeline *const pipeline, int matches)
603 /* go through the replacement string */
604 for (i = 0; replace[i]; i++) {
605 /* if we find a backreference (\1, \2, etc.) print the backref'ed * text */
606 if (replace[i] == '\\' && isdigit(replace[i+1])) {
610 ++i; /* i now indexes the backref number, instead of the leading slash */
611 tmpstr[0] = replace[i];
613 backref = atoi(tmpstr);
614 /* print out the text held in regmatch[backref] */
615 if (backref <= matches && regmatch[backref].rm_so != -1)
616 for (j = regmatch[backref].rm_so; j < regmatch[backref].rm_eo; j++)
620 /* if we find a backslash escaped character, print the character */
621 else if (replace[i] == '\\') {
623 pipeputc(replace[i]);
626 /* if we find an unescaped '&' print out the whole matched text.
627 * fortunately, regmatch[0] contains the indicies to the whole matched
628 * expression (kinda seems like it was designed for just such a
630 else if (replace[i] == '&' && replace[i-1] != '\\') {
632 for (j = regmatch[0].rm_so; j < regmatch[0].rm_eo; j++)
635 /* nothing special, just print this char of the replacement string to stdout */
637 pipeputc(replace[i]);
641 static int do_subst_command(const sed_cmd_t *sed_cmd, char **line)
643 char *hackline = *line;
644 struct pipeline thepipe = { NULL, 0 , 0};
645 struct pipeline *const pipeline = &thepipe;
647 regmatch_t *regmatch = NULL;
649 /* we only proceed if the substitution 'search' expression matches */
650 if (regexec(sed_cmd->sub_match, hackline, 0, NULL, 0) == REG_NOMATCH)
653 /* whaddaya know, it matched. get the number of back references */
654 regmatch = xmalloc(sizeof(regmatch_t) * (sed_cmd->num_backrefs+1));
656 /* allocate more PIPE_GROW bytes
657 if replaced string is larger than original */
658 thepipe.len = strlen(hackline)+PIPE_GROW;
659 thepipe.buf = xcalloc(1, thepipe.len);
661 thepipe.buf[thepipe.len-1] = PIPE_MAGIC;
663 /* and now, as long as we've got a line to try matching and if we can match
664 * the search string, we make substitutions */
665 while ((*hackline || !altered) && (regexec(sed_cmd->sub_match, hackline,
666 sed_cmd->num_backrefs+1, regmatch, 0) != REG_NOMATCH) ) {
669 /* print everything before the match */
670 for (i = 0; i < regmatch[0].rm_so; i++)
671 pipeputc(hackline[i]);
673 /* then print the substitution string */
674 print_subst_w_backrefs(hackline, sed_cmd->replace, regmatch,
675 pipeline, sed_cmd->num_backrefs);
677 /* advance past the match */
678 hackline += regmatch[0].rm_eo;
679 /* flag that something has changed */
682 /* if we're not doing this globally, get out now */
687 for (; *hackline; hackline++) pipeputc(*hackline);
688 if (thepipe.buf[thepipe.idx] == PIPE_MAGIC) thepipe.buf[thepipe.idx] = 0;
698 static sed_cmd_t *branch_to(const char *label)
701 for(sed_cmd = sed_cmd_head.linear; sed_cmd; sed_cmd = sed_cmd->linear) {
702 if (strcmp(sed_cmd->label, label) == 0) {
707 /* If no match returns last command */
711 static void process_file(FILE *file)
714 static int linenum = 0; /* GNU sed does not restart counting lines at EOF */
715 unsigned int still_in_range = 0;
718 line = bb_get_chomped_line_from_file(file);
723 /* go through every line in the file */
729 /* Read one line in advance so we can act on the last line, the '$' address */
730 next_line = bb_get_chomped_line_from_file(file);
735 /* for every line, go through all the commands */
736 for (sed_cmd = sed_cmd_head.linear; sed_cmd; sed_cmd = sed_cmd->linear) {
740 * entry point into sedding...
743 /* no range necessary */
744 (sed_cmd->beg_line == 0 && sed_cmd->end_line == 0 &&
745 sed_cmd->beg_match == NULL &&
746 sed_cmd->end_match == NULL) ||
747 /* this line number is the first address we're looking for */
748 (sed_cmd->beg_line && (sed_cmd->beg_line == linenum)) ||
749 /* this line matches our first address regex */
750 (sed_cmd->beg_match && (regexec(sed_cmd->beg_match, line, 0, NULL, 0) == 0)) ||
751 /* we are currently within the beginning & ending address range */
752 still_in_range || ((sed_cmd->beg_line == -1) && (next_line == NULL))
755 if (sed_cmd->invert ^ matched) {
760 switch (sed_cmd->cmd) {
762 printf("%d\n", linenum);
764 case 'P': { /* Write the current pattern space upto the first newline */
765 char *tmp = strchr(line, '\n');
770 case 'p': /* Write the current pattern space to output */
781 * Some special cases for 's' printing to make it compliant with
782 * GNU sed printing behavior (aka "The -n | s///p Matrix"):
784 * -n ONLY = never print anything regardless of any successful
787 * s///p ONLY = always print successful substitutions, even if
788 * the line is going to be printed anyway (line will be printed
791 * -n AND s///p = print ONLY a successful substitution ONE TIME;
792 * no other lines are printed - this is the reason why the 'p'
793 * flag exists in the first place.
796 /* we print the line once, unless we were told to be quiet */
797 substituted = do_subst_command(sed_cmd, &line);
798 altered |= substituted;
799 if (!be_quiet && altered && ((sed_cmd->linear == NULL) || (sed_cmd->linear->cmd != 's'))) {
803 /* we also print the line if we were given the 'p' flag
804 * (this is quite possibly the second printing) */
805 if ((sed_cmd->sub_p) && altered) {
811 fputs(sed_cmd->editline, stdout);
816 fputs(sed_cmd->editline, stdout);
820 /* single-address case */
821 if ((sed_cmd->end_match == NULL && sed_cmd->end_line == 0)
822 /* multi-address case */
823 /* - matching text */
824 || (sed_cmd->end_match && (regexec(sed_cmd->end_match, line, 0, NULL, 0) == 0))
825 /* - matching line numbers */
826 || (sed_cmd->end_line > 0 && sed_cmd->end_line == linenum))
828 fputs(sed_cmd->editline, stdout);
837 outfile = fopen(sed_cmd->filename, "r");
839 bb_xprint_and_close_file(outfile);
840 /* else if we couldn't open the output file,
841 * no biggie, just don't print anything */
845 case 'q': /* Branch to end of script and quit */
847 /* Exit the outer while loop */
851 case 'n': /* Read next line from input */
854 next_line = bb_get_chomped_line_from_file(file);
857 case 'N': /* Append the next line to the current line */
858 line = realloc(line, strlen(line) + strlen(next_line) + 2);
860 strcat(line, next_line);
861 next_line = bb_get_chomped_line_from_file(file);
865 sed_cmd = branch_to(sed_cmd->label);
869 sed_cmd = branch_to(sed_cmd->label);
878 * exit point from sedding...
882 /* this is a single-address command or... */
883 (sed_cmd->end_line == 0 && sed_cmd->end_match == NULL) || (
884 /* we were in the middle of our address range (this
885 * isn't the first time through) and.. */
886 (still_in_range == 1) && (
887 /* this line number is the last address we're looking for or... */
888 (sed_cmd->end_line && (sed_cmd->end_line == linenum)) ||
889 /* this line matches our last address regex */
890 (sed_cmd->end_match && (regexec(sed_cmd->end_match, line, 0, NULL, 0) == 0))
894 /* we're out of our address range */
898 /* didn't hit the exit? then we're still in the middle of an address range */
908 /* we will print the line unless we were told to be quiet or if the
909 * line was altered (via a 'd'elete or 's'ubstitution), in which case
910 * the altered line was already printed */
911 if (!be_quiet && !altered)
919 extern int sed_main(int argc, char **argv)
921 int opt, status = EXIT_SUCCESS;
923 #ifdef CONFIG_FEATURE_CLEAN_UP
924 /* destroy command strings on exit */
925 if (atexit(destroy_cmd_strs) == -1)
926 bb_perror_msg_and_die("atexit");
929 /* do normal option parsing */
930 while ((opt = getopt(argc, argv, "ne:f:")) > 0) {
939 load_cmd_file(optarg);
946 /* if we didn't get a pattern from a -e and no command file was specified,
947 * argv[optind] should be the pattern. no pattern, no worky */
948 if (sed_cmd_head.linear == NULL) {
949 if (argv[optind] == NULL)
952 add_cmd_str(argv[optind]);
957 /* argv[(optind)..(argc-1)] should be names of file to process. If no
958 * files were specified or '-' was specified, take input from stdin.
959 * Otherwise, we process all the files specified. */
960 if (argv[optind] == NULL || (strcmp(argv[optind], "-") == 0)) {
966 for (i = optind; i < argc; i++) {
967 file = bb_wfopen(argv[i], "r");
972 status = EXIT_FAILURE;