/*
* sed.c - very minimalist version of sed
*
- * Copyright (C) 1999,2000 by Lineo, inc.
- * Written by Mark Whitley <markw@lineo.com>, <markw@enol.com>
+ * Copyright (C) 1999,2000,2001 by Lineo, inc.
+ * Written by Mark Whitley <markw@lineo.com>, <markw@codepoet.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
Supported features and commands in this version of sed:
- comments ('#')
- - Address matching: num|/matchstr/[,num|/matchstr/|$]command
- - Commands: p, d, s/match/replace/[g]
+ - address matching: num|/matchstr/[,num|/matchstr/|$]command
+ - commands: (p)rint, (d)elete, (s)ubstitue (with g & I flags)
+ - edit commands: (a)ppend, (i)nsert, (c)hange
+ - backreferences in substitution expressions (\1, \2...\9)
(Note: Specifying an address (range) to match is *optional*; commands
default to the whole pattern space if no specific address match was
Unsupported features:
- transliteration (y/source-chars/dest-chars/) (use 'tr')
- - no support for characters other than the '/' character for regex matches
- no pattern space hold space storing / swapping (x, etc.)
- no labels / branching (: label, b, t, and friends)
- and lots, lots more.
-
*/
#include <stdio.h>
-#include <stdlib.h> /* for realloc() */
#include <unistd.h> /* for getopt() */
#include <regex.h>
#include <string.h> /* for strdup() */
#include <errno.h>
#include <ctype.h> /* for isspace() */
-#include "internal.h"
-
+#include <stdlib.h>
+#include "busybox.h"
/* externs */
+extern void xregcomp(regex_t *preg, const char *regex, int cflags);
extern int optind; /* in unistd.h */
extern char *optarg; /* ditto */
/* options */
static int be_quiet = 0;
+
struct sed_cmd {
+
+ /* GENERAL FIELDS */
+ char delimiter; /* The delimiter used to separate regexps */
+
/* address storage */
int beg_line; /* 'sed 1p' 0 == no begining line, apply commands to all lines */
int end_line; /* 'sed 1,3p' 0 == no end line, use only beginning. -1 == $ */
/* the command */
char cmd; /* p,d,s (add more at your leisure :-) */
- /* substitution command specific fields */
- regex_t *sub_match; /* sed -e 's/sub_match/replace/' */
- char *replace; /* sed -e 's/sub_match/replace/' XXX: who will hold the \1 \2 \3s? */
+
+ /* SUBSTITUTION COMMAND SPECIFIC FIELDS */
+
+ /* sed -e 's/sub_match/replace/' */
+ regex_t *sub_match;
+ char *replace;
+ unsigned int num_backrefs:4; /* how many back references (\1..\9) */
+ /* Note: GNU/POSIX sed does not save more than nine backrefs, so
+ * we only use 4 bits to hold the number */
unsigned int sub_g:1; /* sed -e 's/foo/bar/g' (global) */
+ unsigned int sub_p:2; /* sed -e 's/foo/bar/p' (print substitution) */
+
+
+ /* EDIT COMMAND (a,i,c) SPEICIFIC FIELDS */
+
+ char *editline;
};
/* globals */
/*static char *cur_file = NULL;*/ /* file currently being processed XXX: do I need this? */
-static const char sed_usage[] =
- "sed [-Vhnef] pattern [files...]\n"
-#ifndef BB_FEATURE_TRIVIAL_HELP
- "\n"
- "-n\tsuppress automatic printing of pattern space\n"
- "-e script\tadd the script to the commands to be executed\n"
- "-f scriptfile\tadd the contents of script-file to the commands to be executed\n"
- "-h\tdisplay this help message\n"
- "-V\toutput version information and exit\n"
- "\n"
- "If no -e or -f is given, the first non-option argument is taken as the\n"
- "sed script to interpret. All remaining arguments are names of input\n"
- "files; if no input files are specified, then the standard input is read.\n"
-#endif
- ;
-
+#ifdef BB_FEATURE_CLEAN_UP
static void destroy_cmd_strs()
{
if (sed_cmds == NULL)
free(sed_cmds);
sed_cmds = NULL;
}
+#endif
-/*
- * trim_str - trims leading and trailing space from a string
- *
- * Note: This returns a malloc'ed string so you must store and free it
- * XXX: This should be in the utility.c file.
- */
-static char *trim_str(const char *str)
-{
- int i;
- char *retstr = strdup(str);
-
- /* trim leading whitespace */
- memmove(retstr, &retstr[strspn(retstr, " \n\t\v")], strlen(retstr));
-
- /* trim trailing whitespace */
- i = strlen(retstr) - 1;
- while (isspace(retstr[i]))
- i--;
- retstr[++i] = 0;
-
- /* Aside:
- *
- * you know, a strrspn() would really be nice cuz then we could say:
- *
- * retstr[strlen(retstr) - strrspn(retstr, " \n\t\v") + 1] = 0;
- */
-
- return retstr;
-}
/*
- * index_of_unescaped_slash - walks left to right through a string beginning
- * at a specified index and returns the index of the next unescaped slash.
+ * index_of_next_unescaped_regexp_delim - walks left to right through a string
+ * beginning at a specified index and returns the index of the next regular
+ * expression delimiter (typically a forward * slash ('/')) not preceeded by
+ * a backslash ('\').
*/
-static int index_of_next_unescaped_slash(int idx, const char *str)
+static int index_of_next_unescaped_regexp_delim(struct sed_cmd *sed_cmd, const char *str, int idx)
{
- do {
- idx++;
- /* test if we've hit the end */
- if (str[idx] == 0)
- return -1;
- } while (str[idx] != '/' && str[idx - 1] != '\\');
+ for ( ; str[idx]; idx++) {
+ if (str[idx] == sed_cmd->delimiter && str[idx-1] != '\\')
+ return idx;
+ }
- return idx;
+ /* if we make it to here, we've hit the end of the string */
+ return -1;
}
/*
* returns the index in the string just past where the address ends.
*/
-static int get_address(const char *str, int *line, regex_t **regex)
+static int get_address(struct sed_cmd *sed_cmd, const char *str, int *line, regex_t **regex)
{
char *my_str = strdup(str);
int idx = 0;
} while (isdigit(my_str[idx]));
my_str[idx] = 0;
*line = atoi(my_str);
- *regex = NULL;
}
else if (my_str[idx] == '$') {
*line = -1;
- *regex = NULL;
idx++;
}
else if (my_str[idx] == '/') {
- idx = index_of_next_unescaped_slash(idx, my_str);
+ idx = index_of_next_unescaped_regexp_delim(sed_cmd, my_str, ++idx);
if (idx == -1)
- fatalError("unterminated match expression\n");
+ error_msg_and_die("unterminated match expression");
my_str[idx] = '\0';
*regex = (regex_t *)xmalloc(sizeof(regex_t));
- if (bb_regcomp(*regex, my_str+1, REG_NEWLINE) != 0) {
- free(my_str);
- exit(1);
- }
+ xregcomp(*regex, my_str+1, 0);
+ idx++; /* so it points to the next character after the last '/' */
}
else {
- fprintf(stderr, "sed.c:get_address: no address found in string\n");
- fprintf(stderr, "\t(you probably didn't check the string you passed me)\n");
+ error_msg("get_address: no address found in string\n"
+ "\t(you probably didn't check the string you passed me)");
idx = -1;
}
return newstr;
}
-static void parse_cmd_str(struct sed_cmd *sed_cmd, const char *cmdstr)
+static int parse_subst_cmd(struct sed_cmd *sed_cmd, const char *substr)
+{
+ int oldidx, cflags = REG_NEWLINE;
+ char *match;
+ int idx = 0;
+ int j;
+
+ /*
+ * the string that gets passed to this function should look like this:
+ * s/match/replace/gIp
+ * || | |||
+ * mandatory optional
+ *
+ * (all three of the '/' slashes are mandatory)
+ */
+
+ /* verify that the 's' is followed by something. That something
+ * (typically a 'slash') is now our regexp delimiter... */
+ if (!substr[++idx])
+ error_msg_and_die("bad format in substitution expression");
+ else
+ sed_cmd->delimiter=substr[idx];
+
+ /* save the match string */
+ oldidx = idx+1;
+ idx = index_of_next_unescaped_regexp_delim(sed_cmd, substr, ++idx);
+ if (idx == -1)
+ error_msg_and_die("bad format in substitution expression");
+ match = strdup_substr(substr, oldidx, idx);
+
+ /* determine the number of back references in the match string */
+ /* Note: we compute this here rather than in the do_subst_command()
+ * function to save processor time, at the expense of a little more memory
+ * (4 bits) per sed_cmd */
+
+ /* sed_cmd->num_backrefs = 0; */ /* XXX: not needed? --apparently not */
+ for (j = 0; match[j]; j++) {
+ /* GNU/POSIX sed does not save more than nine backrefs */
+ if (match[j] == '\\' && match[j+1] == '(' && sed_cmd->num_backrefs <= 9)
+ sed_cmd->num_backrefs++;
+ }
+
+ /* save the replacement string */
+ oldidx = idx+1;
+ idx = index_of_next_unescaped_regexp_delim(sed_cmd, substr, ++idx);
+ if (idx == -1)
+ error_msg_and_die("bad format in substitution expression");
+ sed_cmd->replace = strdup_substr(substr, oldidx, idx);
+
+ /* process the flags */
+ while (substr[++idx]) {
+ switch (substr[idx]) {
+ case 'g':
+ sed_cmd->sub_g = 1;
+ break;
+ case 'I':
+ cflags |= REG_ICASE;
+ break;
+ case 'p':
+ sed_cmd->sub_p = 1;
+ break;
+ default:
+ /* any whitespace or semicolon trailing after a s/// is ok */
+ if (strchr("; \t\v\n\r", substr[idx]))
+ goto out;
+ /* else */
+ error_msg_and_die("bad option in substitution expression");
+ }
+ }
+
+out:
+ /* compile the match string into a regex */
+ sed_cmd->sub_match = (regex_t *)xmalloc(sizeof(regex_t));
+ xregcomp(sed_cmd->sub_match, match, cflags);
+ free(match);
+
+ return idx;
+}
+
+static int parse_edit_cmd(struct sed_cmd *sed_cmd, const char *editstr)
+{
+ int idx = 0;
+ int slashes_eaten = 0;
+ char *ptr; /* shorthand */
+
+ /*
+ * the string that gets passed to this function should look like this:
+ *
+ * need one of these
+ * |
+ * | this backslash (immediately following the edit command) is mandatory
+ * | |
+ * [aic]\
+ * TEXT1\
+ * TEXT2\
+ * TEXTN
+ *
+ * as soon as we hit a TEXT line that has no trailing '\', we're done.
+ * this means a command like:
+ *
+ * i\
+ * INSERTME
+ *
+ * is a-ok.
+ *
+ */
+
+ if (editstr[1] != '\\' && (editstr[2] != '\n' || editstr[2] != '\r'))
+ error_msg_and_die("bad format in edit expression");
+
+ /* store the edit line text */
+ /* make editline big enough to accomodate the extra '\n' we will tack on
+ * to the end */
+ sed_cmd->editline = xmalloc(strlen(&editstr[3]) + 2);
+ strcpy(sed_cmd->editline, &editstr[3]);
+ ptr = sed_cmd->editline;
+
+ /* now we need to go through * and: s/\\[\r\n]$/\n/g on the edit line */
+ while (ptr[idx]) {
+ while (ptr[idx] != '\\' && (ptr[idx+1] != '\n' || ptr[idx+1] != '\r')) {
+ idx++;
+ if (!ptr[idx]) {
+ goto out;
+ }
+ }
+ /* move the newline over the '\' before it (effectively eats the '\') */
+ memmove(&ptr[idx], &ptr[idx+1], strlen(&ptr[idx+1]));
+ ptr[strlen(ptr)-1] = 0;
+ slashes_eaten++;
+ /* substitue \r for \n if needed */
+ if (ptr[idx] == '\r')
+ ptr[idx] = '\n';
+ }
+
+out:
+ ptr[idx] = '\n';
+ ptr[idx+1] = 0;
+
+ /* this accounts for discrepancies between the modified string and the
+ * original string passed in to this function */
+ idx += slashes_eaten;
+
+ /* this accounts for the fact that A) we started at index 3, not at index
+ * 0 and B) that we added an extra '\n' at the end (if you think the next
+ * line should read 'idx += 4' remember, arrays are zero-based) */
+
+ idx += 3;
+
+ return idx;
+}
+
+static char *parse_cmd_str(struct sed_cmd *sed_cmd, const char *cmdstr)
{
int idx = 0;
* part1 part2 part3
*/
+
/* first part (if present) is an address: either a number or a /regex/ */
if (isdigit(cmdstr[idx]) || cmdstr[idx] == '/')
- idx = get_address(cmdstr, &sed_cmd->beg_line, &sed_cmd->beg_match);
+ idx = get_address(sed_cmd, cmdstr, &sed_cmd->beg_line, &sed_cmd->beg_match);
/* second part (if present) will begin with a comma */
if (cmdstr[idx] == ',')
- idx += get_address(&cmdstr[++idx], &sed_cmd->end_line, &sed_cmd->end_match);
+ idx += get_address(sed_cmd, &cmdstr[++idx], &sed_cmd->end_line, &sed_cmd->end_match);
/* last part (mandatory) will be a command */
if (cmdstr[idx] == '\0')
- fatalError("missing command\n");
- if (!strchr("pds", cmdstr[idx])) /* <-- XXX add new commands here */
- fatalError("invalid command\n");
+ error_msg_and_die("missing command");
+ if (!strchr("pdsaic", cmdstr[idx])) /* <-- XXX add new commands here */
+ error_msg_and_die("invalid command");
sed_cmd->cmd = cmdstr[idx];
- /* special-case handling for 's' */
- if (sed_cmd->cmd == 's') {
- int oldidx, cflags = REG_NEWLINE;
- char *match;
- /* format for substitution is:
- * s/match/replace/gI
- * | ||
- * mandatory optional
- */
-
- /* verify that we have an 's' followed by a 'slash' */
- if (cmdstr[++idx] != '/')
- fatalError("bad format in substitution expression\n");
-
- /* save the match string */
- oldidx = idx+1;
- idx = index_of_next_unescaped_slash(idx, cmdstr);
- if (idx == -1)
- fatalError("bad format in substitution expression\n");
- match = strdup_substr(cmdstr, oldidx, idx);
- /* save the replacement string */
- oldidx = idx+1;
- idx = index_of_next_unescaped_slash(idx, cmdstr);
- if (idx == -1)
- fatalError("bad format in substitution expression\n");
- sed_cmd->replace = strdup_substr(cmdstr, oldidx, idx);
-
- /* process the flags */
- while (cmdstr[++idx]) {
- switch (cmdstr[idx]) {
- case 'g':
- sed_cmd->sub_g = 1;
- break;
- case 'I':
- cflags |= REG_ICASE;
- break;
- default:
- fatalError("bad option in substitution expression\n");
- }
- }
-
- /* compile the regex */
- sed_cmd->sub_match = (regex_t *)xmalloc(sizeof(regex_t));
- if (bb_regcomp(sed_cmd->sub_match, match, cflags) != 0) {
- free(match);
- exit(1);
- }
- free(match);
+ /* special-case handling for (s)ubstitution */
+ if (sed_cmd->cmd == 's') {
+ idx += parse_subst_cmd(sed_cmd, &cmdstr[idx]);
+ }
+ /* special-case handling for (a)ppend, (i)nsert, and (c)hange */
+ else if (strchr("aic", cmdstr[idx])) {
+ if (sed_cmd->end_line || sed_cmd->end_match)
+ error_msg_and_die("only a beginning address can be specified for edit commands");
+ idx += parse_edit_cmd(sed_cmd, &cmdstr[idx]);
}
+ /* if it was a single-letter command (such as 'p' or 'd') we need to
+ * increment the index past that command */
+ else
+ idx++;
+
+ /* give back whatever's left over */
+ return (char *)&cmdstr[idx];
}
static void add_cmd_str(const char *cmdstr)
{
- char *my_cmdstr = trim_str(cmdstr);
+ char *mystr = (char *)cmdstr;
- /* if this is a comment, don't even bother */
- if (my_cmdstr[0] == '#') {
- free(my_cmdstr);
- return;
- }
+ do {
- /* grow the array */
- sed_cmds = realloc(sed_cmds, sizeof(struct sed_cmd) * (++ncmds));
- /* zero new element */
- memset(&sed_cmds[ncmds-1], 0, sizeof(struct sed_cmd));
- /* load command string into new array element */
- parse_cmd_str(&sed_cmds[ncmds-1], my_cmdstr);
+ /* trim leading whitespace and semicolons */
+ memmove(mystr, &mystr[strspn(mystr, "; \n\r\t\v")], strlen(mystr));
+ /* if we ate the whole thing, that means there was just trailing
+ * whitespace or a final / no-op semicolon. either way, get out */
+ if (strlen(mystr) == 0)
+ return;
+ /* if this is a comment, jump past it and keep going */
+ if (mystr[0] == '#') {
+ mystr = strpbrk(mystr, ";\n\r");
+ continue;
+ }
+ /* grow the array */
+ sed_cmds = xrealloc(sed_cmds, sizeof(struct sed_cmd) * (++ncmds));
+ /* zero new element */
+ memset(&sed_cmds[ncmds-1], 0, sizeof(struct sed_cmd));
+ /* load command string into new array element, get remainder */
+ mystr = parse_cmd_str(&sed_cmds[ncmds-1], mystr);
+
+ } while (mystr && strlen(mystr));
}
{
FILE *cmdfile;
char *line;
+ char *nextline;
- cmdfile = fopen(filename, "r");
- if (cmdfile == NULL)
- fatalError(strerror(errno));
+ cmdfile = xfopen(filename, "r");
while ((line = get_line_from_file(cmdfile)) != NULL) {
- line[strlen(line)-1] = 0; /* eat newline */
+ /* if a line ends with '\' it needs the next line appended to it */
+ while (line[strlen(line)-2] == '\\' &&
+ (nextline = get_line_from_file(cmdfile)) != NULL) {
+ line = xrealloc(line, strlen(line) + strlen(nextline) + 1);
+ strcat(line, nextline);
+ free(nextline);
+ }
+ /* eat trailing newline (if any) --if I don't do this, edit commands
+ * (aic) will print an extra newline */
+ if (line[strlen(line)-1] == '\n')
+ line[strlen(line)-1] = 0;
add_cmd_str(line);
free(line);
}
}
+static void print_subst_w_backrefs(const char *line, const char *replace, regmatch_t *regmatch)
+{
+ int i;
+
+ /* go through the replacement string */
+ for (i = 0; replace[i]; i++) {
+ /* if we find a backreference (\1, \2, etc.) print the backref'ed * text */
+ if (replace[i] == '\\' && isdigit(replace[i+1])) {
+ int j;
+ char tmpstr[2];
+ int backref;
+ ++i; /* i now indexes the backref number, instead of the leading slash */
+ tmpstr[0] = replace[i];
+ tmpstr[1] = 0;
+ backref = atoi(tmpstr);
+ /* print out the text held in regmatch[backref] */
+ for (j = regmatch[backref].rm_so; j < regmatch[backref].rm_eo; j++)
+ fputc(line[j], stdout);
+ }
+
+ /* if we find a backslash escaped character, print the character */
+ else if (replace[i] == '\\') {
+ ++i;
+ fputc(replace[i], stdout);
+ }
+
+ /* if we find an unescaped '&' print out the whole matched text.
+ * fortunately, regmatch[0] contains the indicies to the whole matched
+ * expression (kinda seems like it was designed for just such a
+ * purpose...) */
+ else if (replace[i] == '&' && replace[i-1] != '\\') {
+ int j;
+ for (j = regmatch[0].rm_so; j < regmatch[0].rm_eo; j++)
+ fputc(line[j], stdout);
+ }
+ /* nothing special, just print this char of the replacement string to stdout */
+ else
+ fputc(replace[i], stdout);
+ }
+}
+
+static int do_subst_command(const struct sed_cmd *sed_cmd, const char *line)
+{
+ char *hackline = (char *)line;
+ int altered = 0;
+ regmatch_t *regmatch = NULL;
+
+ /* we only proceed if the substitution 'search' expression matches */
+ if (regexec(sed_cmd->sub_match, line, 0, NULL, 0) == REG_NOMATCH)
+ return 0;
+
+ /* whaddaya know, it matched. get the number of back references */
+ regmatch = xmalloc(sizeof(regmatch_t) * (sed_cmd->num_backrefs+1));
+
+ /* and now, as long as we've got a line to try matching and if we can match
+ * the search string, we make substitutions */
+ while (*hackline && (regexec(sed_cmd->sub_match, hackline,
+ sed_cmd->num_backrefs+1, regmatch, 0) == 0) ) {
+ int i;
+
+ /* print everything before the match */
+ for (i = 0; i < regmatch[0].rm_so; i++)
+ fputc(hackline[i], stdout);
+
+ /* then print the substitution string */
+ print_subst_w_backrefs(hackline, sed_cmd->replace, regmatch);
+
+ /* advance past the match */
+ hackline += regmatch[0].rm_eo;
+ /* flag that something has changed */
+ altered++;
+
+ /* if we're not doing this globally, get out now */
+ if (!sed_cmd->sub_g)
+ break;
+ }
+
+ /* if there's anything left of the line, print it */
+ if (*hackline)
+ fputs(hackline, stdout);
+
+ /* cleanup */
+ free(regmatch);
+
+ return altered;
+}
static int do_sed_command(const struct sed_cmd *sed_cmd, const char *line)
{
altered++;
break;
- case 's': /* oo, a fun one :-) */
-
- /* we only substitute if the substitution 'search' expression matches */
- if (regexec(sed_cmd->sub_match, line, 0, NULL, 0) == 0) {
- regmatch_t regmatch;
- int i;
- char *ptr = (char *)line;
-
- while (*ptr) {
- /* if we can match the search string... */
- if (regexec(sed_cmd->sub_match, ptr, 1, ®match, 0) == 0) {
- /* print everything before the match, */
- for (i = 0; i < regmatch.rm_so; i++)
- fputc(ptr[i], stdout);
- /* then print the substitution in its place */
- fputs(sed_cmd->replace, stdout);
- /* then advance past the match */
- ptr += regmatch.rm_eo;
- /* and let the calling function know that something
- * has been changed */
- altered++;
-
- /* if we're not doing this globally... */
- if (!sed_cmd->sub_g)
- break;
- }
- /* if we COULD NOT match the search string (meaning we've gone past
- * all previous instances), get out */
- else
- break;
- }
+ case 's':
+
+ /*
+ * Some special cases for 's' printing to make it compliant with
+ * GNU sed printing behavior (aka "The -n | s///p Matrix"):
+ *
+ * -n ONLY = never print anything regardless of any successful
+ * substitution
+ *
+ * s///p ONLY = always print successful substitutions, even if
+ * the line is going to be printed anyway (line will be printed
+ * twice).
+ *
+ * -n AND s///p = print ONLY a successful substitution ONE TIME;
+ * no other lines are printed - this is the reason why the 'p'
+ * flag exists in the first place.
+ */
+
+ /* if the user specified that they didn't want anything printed (i.e. a -n
+ * flag and no 'p' flag after the s///), then there's really no point doing
+ * anything here. */
+ if (be_quiet && !sed_cmd->sub_p)
+ break;
- /* is there anything left to print? */
- if (*ptr)
- fputs(ptr, stdout);
- }
+ /* we print the line once, unless we were told to be quiet */
+ if (!be_quiet)
+ altered = do_subst_command(sed_cmd, line);
+
+ /* we also print the line if we were given the 'p' flag
+ * (this is quite possibly the second printing) */
+ if (sed_cmd->sub_p)
+ altered = do_subst_command(sed_cmd, line);
+
+ break;
+
+ case 'a':
+ fputs(line, stdout);
+ fputs(sed_cmd->editline, stdout);
+ altered++;
+ break;
+ case 'i':
+ fputs(sed_cmd->editline, stdout);
+ break;
+
+ case 'c':
+ fputs(sed_cmd->editline, stdout);
+ altered++;
break;
}
}
/* are we acting on a range of line numbers? */
- else if (sed_cmds[i].beg_line > 0 && sed_cmds[i].end_line > 0) {
- if (linenum >= sed_cmds[i].beg_line && linenum <= sed_cmds[i].end_line)
+ else if (sed_cmds[i].beg_line > 0 && sed_cmds[i].end_line != 0) {
+ if (linenum >= sed_cmds[i].beg_line &&
+ (sed_cmds[i].end_line == -1 || linenum <= sed_cmds[i].end_line))
line_altered += do_sed_command(&sed_cmds[i], line);
}
}
/* we will print the line unless we were told to be quiet or if the
- * line was altered (via a 'd'elete or 's'ubstitution) */
+ * line was altered (via a 'd'elete or 's'ubstitution), in which case
+ * the altered line was already printed */
if (!be_quiet && !line_altered)
fputs(line, stdout);
{
int opt;
- /* do special-case option parsing */
- if (argv[1] && (strcmp(argv[1], "--help") == 0))
- usage(sed_usage);
-
+#ifdef BB_FEATURE_CLEAN_UP
/* destroy command strings on exit */
- if (atexit(destroy_cmd_strs) == -1) {
- perror("sed");
- exit(1);
- }
+ if (atexit(destroy_cmd_strs) == -1)
+ perror_msg_and_die("atexit");
+#endif
/* do normal option parsing */
- while ((opt = getopt(argc, argv, "Vhne:f:")) > 0) {
+ while ((opt = getopt(argc, argv, "hne:f:")) > 0) {
switch (opt) {
- case 'V':
- printf("Print Busybox version here\n");
- exit(0);
- break;
case 'h':
usage(sed_usage);
break;
for (i = optind; i < argc; i++) {
file = fopen(argv[i], "r");
if (file == NULL) {
- fprintf(stderr, "sed: %s: %s\n", argv[i], strerror(errno));
+ perror_msg("%s", argv[i]);
} else {
process_file(file);
fclose(file);
projects / oweals / busybox.git / blobdiff