/*
* 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
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 <string.h> /* for strdup() */
#include <errno.h>
#include <ctype.h> /* for isspace() */
+#include <stdlib.h>
#include "busybox.h"
-#define bb_need_full_version
-#define BB_DECLARE_EXTERN
-#include "messages.c"
-
/* externs */
+extern void xregcomp(regex_t *preg, const char *regex, int cflags);
extern int optind; /* in unistd.h */
extern char *optarg; /* ditto */
/* 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 */
}
#endif
-#if 0
-/*
- * 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.
- * XXX: This is now obsolete. Maybe it belongs nowhere.
- */
-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[strrspn(retstr, " \n\t\v") + 1] = 0;
- */
-
- return retstr;
-}
-#endif
-
-#if 0
-/*
- * strrspn - works just like strspn() but goes from right to left instead of
- * left to right
- */
-static size_t strrspn(const char *s, const char *accept)
-{
- size_t i = strlen(s);
-
- while (strchr(accept, s[--i]))
- ;
-
- return i;
-}
-#endif
/*
- * index_of_next_unescaped_slash - walks left to right through a string
- * beginning at a specified index and returns the index of the next forward
- * slash ('/') not preceeded by a backslash ('\').
+ * 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(const char *str, int idx)
+static int index_of_next_unescaped_regexp_delim(struct sed_cmd *sed_cmd, const char *str, int idx)
{
for ( ; str[idx]; idx++) {
- if (str[idx] == '/' && str[idx-1] != '\\')
+ if (str[idx] == sed_cmd->delimiter && str[idx-1] != '\\')
return idx;
}
/*
* 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;
idx++;
}
else if (my_str[idx] == '/') {
- idx = index_of_next_unescaped_slash(my_str, ++idx);
+ 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));
- xregcomp(*regex, my_str+1, REG_NEWLINE);
+ xregcomp(*regex, my_str+1, 0);
idx++; /* so it points to the next character after the last '/' */
}
else {
- errorMsg("get_address: no address found in string\n"
- "\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;
}
* (all three of the '/' slashes are mandatory)
*/
- /* verify that the 's' is followed by a 'slash' */
- if (substr[++idx] != '/')
- fatalError("bad format in substitution expression\n");
+ /* 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_slash(substr, ++idx);
+ idx = index_of_next_unescaped_regexp_delim(sed_cmd, substr, ++idx);
if (idx == -1)
- fatalError("bad format in substitution expression\n");
+ 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 */
/* save the replacement string */
oldidx = idx+1;
- idx = index_of_next_unescaped_slash(substr, ++idx);
+ idx = index_of_next_unescaped_regexp_delim(sed_cmd, substr, ++idx);
if (idx == -1)
- fatalError("bad format in substitution expression\n");
+ error_msg_and_die("bad format in substitution expression");
sed_cmd->replace = strdup_substr(substr, oldidx, idx);
/* process the flags */
if (strchr("; \t\v\n\r", substr[idx]))
goto out;
/* else */
- fatalError("bad option in substitution expression\n");
+ error_msg_and_die("bad option in substitution expression");
}
}
*/
if (editstr[1] != '\\' && (editstr[2] != '\n' || editstr[2] != '\r'))
- fatalError("bad format in edit expression\n");
+ 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
/* 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");
+ error_msg_and_die("missing command");
if (!strchr("pdsaic", cmdstr[idx])) /* <-- XXX add new commands here */
- fatalError("invalid command\n");
+ error_msg_and_die("invalid command");
sed_cmd->cmd = cmdstr[idx];
/* special-case handling for (s)ubstitution */
/* 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)
- fatalError("only a beginning address can be specified for edit commands\n");
+ 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
}
/* 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;
+ chomp(line);
add_cmd_str(line);
free(line);
}
#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, "hne:f:")) > 0) {
+ while ((opt = getopt(argc, argv, "ne:f:")) > 0) {
switch (opt) {
- case 'h':
- usage(sed_usage);
- break;
case 'n':
be_quiet++;
break;
case 'f':
load_cmd_file(optarg);
break;
+ default:
+ show_usage();
}
}
* argv[optind] should be the pattern. no pattern, no worky */
if (ncmds == 0) {
if (argv[optind] == NULL)
- usage(sed_usage);
+ show_usage();
else {
add_cmd_str(argv[optind]);
optind++;
for (i = optind; i < argc; i++) {
file = fopen(argv[i], "r");
if (file == NULL) {
- errorMsg("%s: %s\n", argv[i], strerror(errno));
+ perror_msg("%s", argv[i]);
} else {
process_file(file);
fclose(file);
projects / oweals / busybox.git / blobdiff