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-rw-r--r--editors/sed.c763
-rw-r--r--sed.c763
2 files changed, 966 insertions, 560 deletions
diff --git a/editors/sed.c b/editors/sed.c
index d4b721e49..329f5ae8d 100644
--- a/editors/sed.c
+++ b/editors/sed.c
@@ -1,15 +1,8 @@
-/* vi: set sw=4 ts=4: */
/*
- * Mini sed implementation for busybox
- *
+ * sed.c - very minimalist version of sed
*
* Copyright (C) 1999,2000 by Lineo, inc.
- * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
- *
- * Modifications for addresses and append command have been
- * written by Marco Pantaleoni <panta@prosa.it>, <panta@elasticworld.org>
- * and are:
- * Copyright (C) 1999 Marco Pantaleoni.
+ * Written by Mark Whitley <markw@lineo.com>, <markw@enol.com>
*
* 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
@@ -27,333 +20,543 @@
*
*/
-#include "internal.h"
-#include "regexp.h"
+/*
+ Supported features and commands in this version of sed:
+
+ - comments ('#')
+ - Address matching: num|/matchstr/[,num|/matchstr/|$]command
+ - Commands: p, d, s/match/replace/[g]
+
+ (Note: Specifying an address (range) to match is *optional*; commands
+ default to the whole pattern space if no specific address match was
+ requested.)
+
+ 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 <dirent.h>
+#include <stdlib.h> /* for realloc() */
+#include <unistd.h> /* for getopt() */
+#include <regex.h>
+#include <string.h> /* for strdup() */
#include <errno.h>
-#include <fcntl.h>
-#include <signal.h>
-#include <time.h>
-#include <ctype.h>
+#include <ctype.h> /* for isspace() */
+#include "internal.h"
+
+
+/* externs */
+extern int optind; /* in unistd.h */
+extern char *optarg; /* ditto */
+
+/* options */
+static int be_quiet = 0;
+
+struct sed_cmd {
+
+ /* 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 == $ */
+ regex_t *beg_match; /* sed -e '/match/cmd' */
+ regex_t *end_match; /* sed -e '/match/,/end_match/cmd' */
+
+ /* 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? */
+ unsigned int sub_g:1; /* sed -e 's/foo/bar/g' (global) */
+};
+
+/* globals */
+static struct sed_cmd *sed_cmds = NULL; /* growable arrary holding a sequence of sed cmds */
+static int ncmds = 0; /* number of sed commands */
+
+/*static char *cur_file = NULL;*/ /* file currently being processed XXX: do I need this? */
static const char sed_usage[] =
- "sed [-n] -e script [file...]\n"
+ "sed [-Vhnef] pattern [files...]\n"
#ifndef BB_FEATURE_TRIVIAL_HELP
- "\nAllowed sed scripts come in the following form:\n"
- "\t'ADDR [!] COMMAND'\n\n"
- "\twhere address ADDR can be:\n"
- "\t NUMBER Match specified line number\n"
- "\t $ Match last line\n"
- "\t /REGEXP/ Match specified regexp\n"
- "\t (! inverts the meaning of the match)\n\n"
- "\tand COMMAND can be:\n"
- "\t s/regexp/replacement/[igp]\n"
- "\t which attempt to match regexp against the pattern space\n"
- "\t and if successful replaces the matched portion with replacement.\n\n"
- "\t aTEXT\n"
- "\t which appends TEXT after the pattern space\n"
- "Options:\n"
- "-e\tadd the script to the commands to be executed\n"
- "-n\tsuppress automatic printing of pattern space\n\n"
-#if defined BB_REGEXP
- "This version of sed matches full regular expressions.\n";
-#else
- "This version of sed matches strings (not full regular expressions).\n"
-#endif
+ "\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
;
-/* Flags & variables */
+#if 0
+/* Nuke from here { */
-typedef enum { f_none, f_replace, f_append } sed_function;
-#define NO_LINE -2
-#define LAST_LINE -1
-static int addr_line = NO_LINE;
-static char *addr_pattern = NULL;
-static int negated = 0;
+/* get_line_from_file() - This function reads an entire line from a text file
+ * * up to a newline. It returns a malloc'ed char * which must be stored and
+ * * free'ed by the caller. */
+extern char *get_line_from_file(FILE *file)
+{
+ static const int GROWBY = 80; /* how large we will grow strings by */
-#define SKIPSPACES(p) do { while (isspace(*(p))) (p)++; } while (0)
+ int ch;
+ int idx = 0;
+ char *linebuf = NULL;
+ int linebufsz = 0;
-#define BUFSIZE 1024
+ while (1) {
+ ch = fgetc(file);
+ if (ch == EOF)
+ break;
+ /* grow the line buffer as necessary */
+ if (idx > linebufsz-2)
+ linebuf = realloc(linebuf, linebufsz += GROWBY);
+ linebuf[idx++] = (char)ch;
+ if ((char)ch == '\n')
+ break;
+ }
+
+ if (idx == 0)
+ return NULL;
+
+ linebuf[idx] = 0;
+ return linebuf;
+}
-static inline int at_last(FILE * fp)
+static void usage(const char *string)
{
- int res = 0;
+ printf("usage: %s\n", string);
+ exit(0);
+}
- if (feof(fp))
- return 1;
- else {
- int ch;
+/* } to here when we integrate this into busybox */
+#endif
+
+static void destroy_cmd_strs()
+{
+ if (sed_cmds == NULL)
+ return;
+
+ /* destroy all the elements in the array */
+ while (--ncmds >= 0) {
- if ((ch = fgetc(fp)) == EOF)
- res++;
- ungetc(ch, fp);
+ if (sed_cmds[ncmds].beg_match) {
+ regfree(sed_cmds[ncmds].beg_match);
+ free(sed_cmds[ncmds].beg_match);
+ }
+ if (sed_cmds[ncmds].end_match) {
+ regfree(sed_cmds[ncmds].end_match);
+ free(sed_cmds[ncmds].end_match);
+ }
+ if (sed_cmds[ncmds].sub_match) {
+ regfree(sed_cmds[ncmds].sub_match);
+ free(sed_cmds[ncmds].sub_match);
+ }
+ if (sed_cmds[ncmds].replace)
+ free(sed_cmds[ncmds].replace);
}
- return res;
+
+ /* destroy the array */
+ free(sed_cmds);
+ sed_cmds = NULL;
+}
+
+static void exit_sed(int retcode, const char *message)
+{
+ destroy_cmd_strs();
+ if (message)
+ fputs(message, stderr);
+ exit(retcode);
}
-static void do_sed_repl(FILE * fp, char *needle, char *newNeedle,
- int ignoreCase, int printFlag, int quietFlag)
+/*
+ * 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.
+ */
+static int index_of_next_unescaped_slash(int idx, const char *str)
+{
+ do {
+ idx++;
+ /* test if we've hit the end */
+ if (str[idx] == 0)
+ return -1;
+ } while (str[idx] != '/' && 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)
{
- int foundOne = FALSE;
- char haystack[BUFSIZE];
- int line = 1, doit;
-
- while (fgets(haystack, BUFSIZE - 1, fp)) {
- doit = 0;
- if (addr_pattern) {
- doit = !find_match(haystack, addr_pattern, FALSE);
- } else if (addr_line == NO_LINE)
- doit = 1;
- else if (addr_line == LAST_LINE) {
- if (at_last(fp))
- doit = 1;
- } else {
- if (line == addr_line)
- doit = 1;
+ char *my_str = strdup(str);
+ int idx = 0;
+
+ if (isdigit(my_str[idx])) {
+ do {
+ idx++;
+ } 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] == '/') {
+ int ret;
+ idx = index_of_next_unescaped_slash(idx, my_str);
+ if (idx == -1) {
+ free(my_str);
+ exit_sed(1, "sed: unterminated match expression\n");
}
- if (negated)
- doit = 1 - doit;
- if (doit) {
- foundOne =
- replace_match(haystack, needle, newNeedle, ignoreCase);
-
- if (foundOne == TRUE && printFlag == TRUE) {
- fprintf(stdout, haystack);
+ my_str[idx] = 0; /* shave off the trailing '/' */
+ my_str++; /* shave off the leading '/' */
+ *regex = (regex_t *)malloc(sizeof(regex_t));
+ if ((ret = regcomp(*regex, my_str, 0)) != 0) {
+ /* error handling if regular expression couldn't be compiled */
+ int errmsgsz = regerror(ret, *regex, NULL, 0);
+ char *errmsg = malloc(errmsgsz);
+ if (errmsg == NULL) {
+ exit_sed(1, "sed: memory error\n");
}
+ regerror(ret, *regex, errmsg, errmsgsz);
+ fprintf(stderr, "sed: %s\n", errmsg);
+ free(errmsg);
+ exit_sed(1, NULL);
}
+ my_str--; /* move my_str back so free() (below) won't barf */
+ idx++; /* advance idx one past the end of the /match/ */
+ }
+ 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");
+ idx = -1;
+ }
- if (quietFlag == FALSE) {
- fprintf(stdout, haystack);
- }
+ free(my_str);
+ return idx;
+}
- line++;
+static void parse_cmd_str(struct sed_cmd *sed_cmd, const char *cmdstr)
+{
+ int idx = 0;
+
+ /* parse the command
+ * format is: [addr][,addr]cmd
+ * |----||-----||-|
+ * 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);
+
+ /* 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);
+
+ /* last part (mandatory) will be a command */
+ if (cmdstr[idx] == '\0')
+ exit_sed(1, "sed: missing command\n");
+ if (!strchr("pds", cmdstr[idx])) /* <-- XXX add new commands here */
+ exit_sed(1, "sed: invalid command\n");
+ sed_cmd->cmd = cmdstr[idx];
+ /* special-case handling for 's' */
+ if (sed_cmd->cmd == 's') {
+ int oldidx;
+ /* format for substitution is:
+ * s/match/replace/g
+ * | |
+ * mandatory optional
+ */
+
+ /* verify that we have an 's' followed by a 'slash' */
+ if (cmdstr[++idx] != '/')
+ exit_sed(1, "sed: bad format in substitution expression\n");
+
+ /* get the substitution part */
+ idx += get_address(&cmdstr[idx], NULL, &sed_cmd->sub_match);
+
+ /* get the replacement part */
+ oldidx = idx;
+ idx = index_of_next_unescaped_slash(idx, cmdstr);
+ sed_cmd->replace = (char *)malloc(idx - oldidx + 1);
+ strncpy(sed_cmd->replace, &cmdstr[oldidx], idx - oldidx);
+ sed_cmd->replace[idx - oldidx] = 0;
+
+ /* store the 'g' if present */
+ if (cmdstr[++idx] == 'g')
+ sed_cmd->sub_g = 1;
}
}
-static void do_sed_append(FILE * fp, char *appendline, int quietFlag)
+static void add_cmd_str(const char *cmdstr)
{
- char buffer[BUFSIZE];
- int line = 1, doit;
-
- while (fgets(buffer, BUFSIZE - 1, fp)) {
- doit = 0;
- if (addr_pattern) {
- doit = !find_match(buffer, addr_pattern, FALSE);
- } else if (addr_line == NO_LINE)
- doit = 1;
- else if (addr_line == LAST_LINE) {
- if (at_last(fp))
- doit = 1;
- } else {
- if (line == addr_line)
- doit = 1;
- }
- if (negated)
- doit = 1 - doit;
- if (quietFlag == FALSE) {
- fprintf(stdout, buffer);
- }
- if (doit) {
- fputs(appendline, stdout);
- fputc('\n', stdout);
- }
+ char *my_cmdstr = trim_str(cmdstr);
- line++;
+ /* if this is a comment, don't even bother */
+ if (my_cmdstr[0] == '#') {
+ free(my_cmdstr);
+ return;
}
+
+ /* 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);
}
-extern int sed_main(int argc, char **argv)
+
+static void load_cmd_file(char *filename)
{
- FILE *fp;
- char *needle = NULL, *newNeedle = NULL;
- char *name;
- char *cp;
- int ignoreCase = FALSE;
- int printFlag = FALSE;
- int quietFlag = FALSE;
- int stopNow;
- char *line_s = NULL, saved;
- char *appendline = NULL;
- char *pos;
- sed_function sed_f = f_none;
-
- argc--;
- argv++;
- if (argc < 1) {
- usage(sed_usage);
+ FILE *cmdfile;
+ char *line;
+
+ cmdfile = fopen(filename, "r");
+ if (cmdfile == NULL)
+ exit_sed(1, strerror(errno));
+
+ while ((line = get_line_from_file(cmdfile)) != NULL) {
+ line[strlen(line)-1] = 0; /* eat newline */
+ add_cmd_str(line);
+ free(line);
}
+}
- while (argc > 1) {
- if (**argv != '-')
- usage(sed_usage);
- argc--;
- cp = *argv++;
- stopNow = FALSE;
- while (*++cp && stopNow == FALSE) {
- switch (*cp) {
- case 'n':
- quietFlag = TRUE;
- break;
- case 'e':
- if (*(cp + 1) == 0 && --argc < 0) {
- usage(sed_usage);
- }
- if (*++cp != 's')
- cp = *argv++;
-
- /* Read address if present */
- SKIPSPACES(cp);
- if (*cp == '$') {
- addr_line = LAST_LINE;
- cp++;
- } else {
- if (isdigit(*cp)) { /* LINE ADDRESS */
- line_s = cp;
- while (isdigit(*cp))
- cp++;
- if (cp > line_s) {
- /* numeric line */
- saved = *cp;
- *cp = '\0';
- addr_line = atoi(line_s);
- *cp = saved;
- }
- } else if (*cp == '/') { /* PATTERN ADDRESS */
- pos = addr_pattern = cp + 1;
- pos = strchr(pos, '/');
- if (!pos)
- usage(sed_usage);
- *pos = '\0';
- cp = pos + 1;
- }
- }
+static int do_sed_command(const struct sed_cmd *sed_cmd, const char *line)
+{
+ int altered = 0;
- SKIPSPACES(cp);
- if (*cp == '!') {
- negated++;
- cp++;
- }
+ switch (sed_cmd->cmd) {
- /* Read command */
+ case 'p':
+ fputs(line, stdout);
+ break;
- SKIPSPACES(cp);
- switch (*cp) {
- case 's': /* REPLACE */
- if (strlen(cp) <= 3 || *(cp + 1) != '/')
- break;
- sed_f = f_replace;
-
- pos = needle = cp + 2;
-
- for (;;) {
- pos = strchr(pos, '/');
- if (pos == NULL) {
- usage(sed_usage);
- }
- if (*(pos - 1) == '\\') {
- pos++;
- continue;
- }
- break;
+ case 'd':
+ 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, &regmatch, 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;
}
- *pos = 0;
- newNeedle = ++pos;
- for (;;) {
- pos = strchr(pos, '/');
- if (pos == NULL) {
- usage(sed_usage);
- }
- if (*(pos - 1) == '\\') {
- pos++;
- continue;
- }
+ /* if we COULD NOT match the search string (meaning we've gone past
+ * all previous instances), get out */
+ else
break;
- }
- *pos = 0;
- if (pos + 2 != 0) {
- while (*++pos) {
- switch (*pos) {
- case 'i':
- ignoreCase = TRUE;
- break;
- case 'p':
- printFlag = TRUE;
- break;
- case 'g':
- break;
- default:
- usage(sed_usage);
- }
- }
- }
- cp = pos;
- /* fprintf(stderr, "replace '%s' with '%s'\n", needle, newNeedle); */
- break;
+ }
- case 'a': /* APPEND */
- if (strlen(cp) < 2)
- break;
- sed_f = f_append;
- appendline = ++cp;
- /* fprintf(stderr, "append '%s'\n", appendline); */
- break;
+ /* is there anything left to print? */
+ if (*ptr)
+ fputs(ptr, stdout);
+ }
+
+ break;
+ }
+
+ return altered;
+}
+
+static void process_file(FILE *file)
+{
+ char *line = NULL;
+ static int linenum = 0; /* GNU sed does not restart counting lines at EOF */
+ unsigned int still_in_range = 0;
+ int line_altered;
+ int i;
+
+ /* go through every line in the file */
+ while ((line = get_line_from_file(file)) != NULL) {
+
+ linenum++;
+ line_altered = 0;
+
+ /* for every line, go through all the commands */
+ for (i = 0; i < ncmds; i++) {
+
+ /* are we acting on a range of matched lines? */
+ if (sed_cmds[i].beg_match && sed_cmds[i].end_match) {
+ if (still_in_range || regexec(sed_cmds[i].beg_match, line, 0, NULL, 0) == 0) {
+ line_altered += do_sed_command(&sed_cmds[i], line);
+ still_in_range = 1;
+ if (regexec(sed_cmds[i].end_match, line, 0, NULL, 0) == 0)
+ still_in_range = 0;
}
+ }
- stopNow = TRUE;
- break;
+ /* are we trying to match a single line? */
+ else if (sed_cmds[i].beg_match) {
+ if (regexec(sed_cmds[i].beg_match, line, 0, NULL, 0) == 0)
+ line_altered += do_sed_command(&sed_cmds[i], line);
+ }
- default:
- usage(sed_usage);
+ /* 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)
+ line_altered += do_sed_command(&sed_cmds[i], line);
}
- }
- }
- if (argc == 0) {
- switch (sed_f) {
- case f_none:
- break;
- case f_replace:
- do_sed_repl(stdin, needle, newNeedle, ignoreCase, printFlag,
- quietFlag);
- break;
- case f_append:
- do_sed_append(stdin, appendline, quietFlag);
- break;
- }
- } else {
- while (argc-- > 0) {
- name = *argv++;
-
- fp = fopen(name, "r");
- if (fp == NULL) {
- perror(name);
- continue;
+ /* are we acting on a specified line number */
+ else if (sed_cmds[i].beg_line > 0) {
+ if (linenum == sed_cmds[i].beg_line)
+ line_altered += do_sed_command(&sed_cmds[i], line);
}
- switch (sed_f) {
- case f_none:
+ /* not acting on matches or line numbers. act on every line */
+ else
+ 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) */
+ if (!be_quiet && !line_altered)
+ fputs(line, stdout);
+
+ free(line);
+ }
+}
+
+extern int sed_main(int argc, char **argv)
+{
+ int opt;
+
+ /* do special-case option parsing */
+ if (argv[1] && (strcmp(argv[1], "--help") == 0))
+ usage(sed_usage);
+
+ /* do normal option parsing */
+ while ((opt = getopt(argc, argv, "Vhne:f:")) > 0) {
+ switch (opt) {
+ case 'V':
+ printf("Print Busybox version here\n");
+ exit(0);
break;
- case f_replace:
- do_sed_repl(fp, needle, newNeedle, ignoreCase, printFlag,
- quietFlag);
+ case 'h':
+ usage(sed_usage);
break;
- case f_append:
- do_sed_append(fp, appendline, quietFlag);
+ case 'n':
+ be_quiet++;
break;
- }
+ case 'e':
+ add_cmd_str(optarg);
+ break;
+ case 'f':
+ load_cmd_file(optarg);
+ break;
+ }
+ }
+
+ /* if we didn't get a pattern from a -e and no command file was specified,
+ * argv[optind] should be the pattern. no pattern, no worky */
+ if (ncmds == 0) {
+ if (argv[optind] == NULL)
+ usage(sed_usage);
+ else {
+ add_cmd_str(argv[optind]);
+ optind++;
+ }
+ }
- if (ferror(fp))
- perror(name);
- fclose(fp);
+ /* argv[(optind)..(argc-1)] should be names of file to process. If no
+ * files were specified or '-' was specified, take input from stdin.
+ * Otherwise, we process all the files specified. */
+ if (argv[optind] == NULL || (strcmp(argv[optind], "-") == 0)) {
+ process_file(stdin);
+ }
+ else {
+ int i;
+ FILE *file;
+ for (i = optind; i < argc; i++) {
+ file = fopen(argv[i], "r");
+ if (file == NULL) {
+ fprintf(stderr, "sed: %s: %s\n", argv[i], strerror(errno));
+ } else {
+ process_file(file);
+ fclose(file);
+ }
}
}
- return(TRUE);
-}
+
+ exit_sed(0, NULL);
+ /* not reached */
+ return 0;
+}
-/* END CODE */
+#ifdef TEST_SED
+int main(int argc, char **argv)
+{
+ return sed_main(argc, argv);
+}
+#endif
diff --git a/sed.c b/sed.c
index d4b721e49..329f5ae8d 100644
--- a/sed.c
+++ b/sed.c
@@ -1,15 +1,8 @@
-/* vi: set sw=4 ts=4: */
/*
- * Mini sed implementation for busybox
- *
+ * sed.c - very minimalist version of sed
*
* Copyright (C) 1999,2000 by Lineo, inc.
- * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
- *
- * Modifications for addresses and append command have been
- * written by Marco Pantaleoni <panta@prosa.it>, <panta@elasticworld.org>
- * and are:
- * Copyright (C) 1999 Marco Pantaleoni.
+ * Written by Mark Whitley <markw@lineo.com>, <markw@enol.com>
*
* 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
@@ -27,333 +20,543 @@
*
*/
-#include "internal.h"
-#include "regexp.h"
+/*
+ Supported features and commands in this version of sed:
+
+ - comments ('#')
+ - Address matching: num|/matchstr/[,num|/matchstr/|$]command
+ - Commands: p, d, s/match/replace/[g]
+
+ (Note: Specifying an address (range) to match is *optional*; commands
+ default to the whole pattern space if no specific address match was
+ requested.)
+
+ 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 <dirent.h>
+#include <stdlib.h> /* for realloc() */
+#include <unistd.h> /* for getopt() */
+#include <regex.h>
+#include <string.h> /* for strdup() */
#include <errno.h>
-#include <fcntl.h>
-#include <signal.h>
-#include <time.h>
-#include <ctype.h>
+#include <ctype.h> /* for isspace() */
+#include "internal.h"
+
+
+/* externs */
+extern int optind; /* in unistd.h */
+extern char *optarg; /* ditto */
+
+/* options */
+static int be_quiet = 0;
+
+struct sed_cmd {
+
+ /* 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 == $ */
+ regex_t *beg_match; /* sed -e '/match/cmd' */
+ regex_t *end_match; /* sed -e '/match/,/end_match/cmd' */
+
+ /* 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? */
+ unsigned int sub_g:1; /* sed -e 's/foo/bar/g' (global) */
+};
+
+/* globals */
+static struct sed_cmd *sed_cmds = NULL; /* growable arrary holding a sequence of sed cmds */
+static int ncmds = 0; /* number of sed commands */
+
+/*static char *cur_file = NULL;*/ /* file currently being processed XXX: do I need this? */
static const char sed_usage[] =
- "sed [-n] -e script [file...]\n"
+ "sed [-Vhnef] pattern [files...]\n"
#ifndef BB_FEATURE_TRIVIAL_HELP
- "\nAllowed sed scripts come in the following form:\n"
- "\t'ADDR [!] COMMAND'\n\n"
- "\twhere address ADDR can be:\n"
- "\t NUMBER Match specified line number\n"
- "\t $ Match last line\n"
- "\t /REGEXP/ Match specified regexp\n"
- "\t (! inverts the meaning of the match)\n\n"
- "\tand COMMAND can be:\n"
- "\t s/regexp/replacement/[igp]\n"
- "\t which attempt to match regexp against the pattern space\n"
- "\t and if successful replaces the matched portion with replacement.\n\n"
- "\t aTEXT\n"
- "\t which appends TEXT after the pattern space\n"
- "Options:\n"
- "-e\tadd the script to the commands to be executed\n"
- "-n\tsuppress automatic printing of pattern space\n\n"
-#if defined BB_REGEXP
- "This version of sed matches full regular expressions.\n";
-#else
- "This version of sed matches strings (not full regular expressions).\n"
-#endif
+ "\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
;
-/* Flags & variables */
+#if 0
+/* Nuke from here { */
-typedef enum { f_none, f_replace, f_append } sed_function;
-#define NO_LINE -2
-#define LAST_LINE -1
-static int addr_line = NO_LINE;
-static char *addr_pattern = NULL;
-static int negated = 0;
+/* get_line_from_file() - This function reads an entire line from a text file
+ * * up to a newline. It returns a malloc'ed char * which must be stored and
+ * * free'ed by the caller. */
+extern char *get_line_from_file(FILE *file)
+{
+ static const int GROWBY = 80; /* how large we will grow strings by */
-#define SKIPSPACES(p) do { while (isspace(*(p))) (p)++; } while (0)
+ int ch;
+ int idx = 0;
+ char *linebuf = NULL;
+ int linebufsz = 0;
-#define BUFSIZE 1024
+ while (1) {
+ ch = fgetc(file);
+ if (ch == EOF)
+ break;
+ /* grow the line buffer as necessary */
+ if (idx > linebufsz-2)
+ linebuf = realloc(linebuf, linebufsz += GROWBY);
+ linebuf[idx++] = (char)ch;
+ if ((char)ch == '\n')
+ break;
+ }
+
+ if (idx == 0)
+ return NULL;
+
+ linebuf[idx] = 0;
+ return linebuf;
+}
-static inline int at_last(FILE * fp)
+static void usage(const char *string)
{
- int res = 0;
+ printf("usage: %s\n", string);
+ exit(0);
+}
- if (feof(fp))
- return 1;
- else {
- int ch;
+/* } to here when we integrate this into busybox */
+#endif
+
+static void destroy_cmd_strs()
+{
+ if (sed_cmds == NULL)
+ return;
+
+ /* destroy all the elements in the array */
+ while (--ncmds >= 0) {
- if ((ch = fgetc(fp)) == EOF)
- res++;
- ungetc(ch, fp);
+ if (sed_cmds[ncmds].beg_match) {
+ regfree(sed_cmds[ncmds].beg_match);
+ free(sed_cmds[ncmds].beg_match);
+ }
+ if (sed_cmds[ncmds].end_match) {
+ regfree(sed_cmds[ncmds].end_match);
+ free(sed_cmds[ncmds].end_match);
+ }
+ if (sed_cmds[ncmds].sub_match) {
+ regfree(sed_cmds[ncmds].sub_match);
+ free(sed_cmds[ncmds].sub_match);
+ }
+ if (sed_cmds[ncmds].replace)
+ free(sed_cmds[ncmds].replace);
}
- return res;
+
+ /* destroy the array */
+ free(sed_cmds);
+ sed_cmds = NULL;
+}
+
+static void exit_sed(int retcode, const char *message)
+{
+ destroy_cmd_strs();
+ if (message)
+ fputs(message, stderr);
+ exit(retcode);
}
-static void do_sed_repl(FILE * fp, char *needle, char *newNeedle,
- int ignoreCase, int printFlag, int quietFlag)
+/*
+ * 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.
+ */
+static int index_of_next_unescaped_slash(int idx, const char *str)
+{
+ do {
+ idx++;
+ /* test if we've hit the end */
+ if (str[idx] == 0)
+ return -1;
+ } while (str[idx] != '/' && 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)
{
- int foundOne = FALSE;
- char haystack[BUFSIZE];
- int line = 1, doit;
-
- while (fgets(haystack, BUFSIZE - 1, fp)) {
- doit = 0;
- if (addr_pattern) {
- doit = !find_match(haystack, addr_pattern, FALSE);
- } else if (addr_line == NO_LINE)
- doit = 1;
- else if (addr_line == LAST_LINE) {
- if (at_last(fp))
- doit = 1;
- } else {
- if (line == addr_line)
- doit = 1;
+ char *my_str = strdup(str);
+ int idx = 0;
+
+ if (isdigit(my_str[idx])) {
+ do {
+ idx++;
+ } 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] == '/') {
+ int ret;
+ idx = index_of_next_unescaped_slash(idx, my_str);
+ if (idx == -1) {
+ free(my_str);
+ exit_sed(1, "sed: unterminated match expression\n");
}
- if (negated)
- doit = 1 - doit;
- if (doit) {
- foundOne =
- replace_match(haystack, needle, newNeedle, ignoreCase);
-
- if (foundOne == TRUE && printFlag == TRUE) {
- fprintf(stdout, haystack);
+ my_str[idx] = 0; /* shave off the trailing '/' */
+ my_str++; /* shave off the leading '/' */
+ *regex = (regex_t *)malloc(sizeof(regex_t));
+ if ((ret = regcomp(*regex, my_str, 0)) != 0) {
+ /* error handling if regular expression couldn't be compiled */
+ int errmsgsz = regerror(ret, *regex, NULL, 0);
+ char *errmsg = malloc(errmsgsz);
+ if (errmsg == NULL) {
+ exit_sed(1, "sed: memory error\n");
}
+ regerror(ret, *regex, errmsg, errmsgsz);
+ fprintf(stderr, "sed: %s\n", errmsg);
+ free(errmsg);
+ exit_sed(1, NULL);
}
+ my_str--; /* move my_str back so free() (below) won't barf */
+ idx++; /* advance idx one past the end of the /match/ */
+ }
+ 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");
+ idx = -1;
+ }
- if (quietFlag == FALSE) {
- fprintf(stdout, haystack);
- }
+ free(my_str);
+ return idx;
+}
- line++;
+static void parse_cmd_str(struct sed_cmd *sed_cmd, const char *cmdstr)
+{
+ int idx = 0;
+
+ /* parse the command
+ * format is: [addr][,addr]cmd
+ * |----||-----||-|
+ * 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);
+
+ /* 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);
+
+ /* last part (mandatory) will be a command */
+ if (cmdstr[idx] == '\0')
+ exit_sed(1, "sed: missing command\n");
+ if (!strchr("pds", cmdstr[idx])) /* <-- XXX add new commands here */
+ exit_sed(1, "sed: invalid command\n");
+ sed_cmd->cmd = cmdstr[idx];
+ /* special-case handling for 's' */
+ if (sed_cmd->cmd == 's') {
+ int oldidx;
+ /* format for substitution is:
+ * s/match/replace/g
+ * | |
+ * mandatory optional
+ */
+
+ /* verify that we have an 's' followed by a 'slash' */
+ if (cmdstr[++idx] != '/')
+ exit_sed(1, "sed: bad format in substitution expression\n");
+
+ /* get the substitution part */
+ idx += get_address(&cmdstr[idx], NULL, &sed_cmd->sub_match);
+
+ /* get the replacement part */
+ oldidx = idx;
+ idx = index_of_next_unescaped_slash(idx, cmdstr);
+ sed_cmd->replace = (char *)malloc(idx - oldidx + 1);
+ strncpy(sed_cmd->replace, &cmdstr[oldidx], idx - oldidx);
+ sed_cmd->replace[idx - oldidx] = 0;
+
+ /* store the 'g' if present */
+ if (cmdstr[++idx] == 'g')
+ sed_cmd->sub_g = 1;
}
}
-static void do_sed_append(FILE * fp, char *appendline, int quietFlag)
+static void add_cmd_str(const char *cmdstr)
{
- char buffer[BUFSIZE];
- int line = 1, doit;
-
- while (fgets(buffer, BUFSIZE - 1, fp)) {
- doit = 0;
- if (addr_pattern) {
- doit = !find_match(buffer, addr_pattern, FALSE);
- } else if (addr_line == NO_LINE)
- doit = 1;
- else if (addr_line == LAST_LINE) {
- if (at_last(fp))
- doit = 1;
- } else {
- if (line == addr_line)
- doit = 1;
- }
- if (negated)
- doit = 1 - doit;
- if (quietFlag == FALSE) {
- fprintf(stdout, buffer);
- }
- if (doit) {
- fputs(appendline, stdout);
- fputc('\n', stdout);
- }
+ char *my_cmdstr = trim_str(cmdstr);
- line++;
+ /* if this is a comment, don't even bother */
+ if (my_cmdstr[0] == '#') {
+ free(my_cmdstr);
+ return;
}
+
+ /* 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);
}
-extern int sed_main(int argc, char **argv)
+
+static void load_cmd_file(char *filename)
{
- FILE *fp;
- char *needle = NULL, *newNeedle = NULL;
- char *name;
- char *cp;
- int ignoreCase = FALSE;
- int printFlag = FALSE;
- int quietFlag = FALSE;
- int stopNow;
- char *line_s = NULL, saved;
- char *appendline = NULL;
- char *pos;
- sed_function sed_f = f_none;
-
- argc--;
- argv++;
- if (argc < 1) {
- usage(sed_usage);
+ FILE *cmdfile;
+ char *line;
+
+ cmdfile = fopen(filename, "r");
+ if (cmdfile == NULL)
+ exit_sed(1, strerror(errno));
+
+ while ((line = get_line_from_file(cmdfile)) != NULL) {
+ line[strlen(line)-1] = 0; /* eat newline */
+ add_cmd_str(line);
+ free(line);
}
+}
- while (argc > 1) {
- if (**argv != '-')
- usage(sed_usage);
- argc--;
- cp = *argv++;
- stopNow = FALSE;
- while (*++cp && stopNow == FALSE) {
- switch (*cp) {
- case 'n':
- quietFlag = TRUE;
- break;
- case 'e':
- if (*(cp + 1) == 0 && --argc < 0) {
- usage(sed_usage);
- }
- if (*++cp != 's')
- cp = *argv++;
-
- /* Read address if present */
- SKIPSPACES(cp);
- if (*cp == '$') {
- addr_line = LAST_LINE;
- cp++;
- } else {
- if (isdigit(*cp)) { /* LINE ADDRESS */
- line_s = cp;
- while (isdigit(*cp))
- cp++;
- if (cp > line_s) {
- /* numeric line */
- saved = *cp;
- *cp = '\0';
- addr_line = atoi(line_s);
- *cp = saved;
- }
- } else if (*cp == '/') { /* PATTERN ADDRESS */
- pos = addr_pattern = cp + 1;
- pos = strchr(pos, '/');
- if (!pos)
- usage(sed_usage);
- *pos = '\0';
- cp = pos + 1;
- }
- }
+static int do_sed_command(const struct sed_cmd *sed_cmd, const char *line)
+{
+ int altered = 0;
- SKIPSPACES(cp);
- if (*cp == '!') {
- negated++;
- cp++;
- }
+ switch (sed_cmd->cmd) {
- /* Read command */
+ case 'p':
+ fputs(line, stdout);
+ break;
- SKIPSPACES(cp);
- switch (*cp) {
- case 's': /* REPLACE */
- if (strlen(cp) <= 3 || *(cp + 1) != '/')
- break;
- sed_f = f_replace;
-
- pos = needle = cp + 2;
-
- for (;;) {
- pos = strchr(pos, '/');
- if (pos == NULL) {
- usage(sed_usage);
- }
- if (*(pos - 1) == '\\') {
- pos++;
- continue;
- }
- break;
+ case 'd':
+ 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, &regmatch, 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;
}
- *pos = 0;
- newNeedle = ++pos;
- for (;;) {
- pos = strchr(pos, '/');
- if (pos == NULL) {
- usage(sed_usage);
- }
- if (*(pos - 1) == '\\') {
- pos++;
- continue;
- }
+ /* if we COULD NOT match the search string (meaning we've gone past
+ * all previous instances), get out */
+ else
break;
- }
- *pos = 0;
- if (pos + 2 != 0) {
- while (*++pos) {
- switch (*pos) {
- case 'i':
- ignoreCase = TRUE;
- break;
- case 'p':
- printFlag = TRUE;
- break;
- case 'g':
- break;
- default:
- usage(sed_usage);
- }
- }
- }
- cp = pos;
- /* fprintf(stderr, "replace '%s' with '%s'\n", needle, newNeedle); */
- break;
+ }
- case 'a': /* APPEND */
- if (strlen(cp) < 2)
- break;
- sed_f = f_append;
- appendline = ++cp;
- /* fprintf(stderr, "append '%s'\n", appendline); */
- break;
+ /* is there anything left to print? */
+ if (*ptr)
+ fputs(ptr, stdout);
+ }
+
+ break;
+ }
+
+ return altered;
+}
+
+static void process_file(FILE *file)
+{
+ char *line = NULL;
+ static int linenum = 0; /* GNU sed does not restart counting lines at EOF */
+ unsigned int still_in_range = 0;
+ int line_altered;
+ int i;
+
+ /* go through every line in the file */
+ while ((line = get_line_from_file(file)) != NULL) {
+
+ linenum++;
+ line_altered = 0;
+
+ /* for every line, go through all the commands */
+ for (i = 0; i < ncmds; i++) {
+
+ /* are we acting on a range of matched lines? */
+ if (sed_cmds[i].beg_match && sed_cmds[i].end_match) {
+ if (still_in_range || regexec(sed_cmds[i].beg_match, line, 0, NULL, 0) == 0) {
+ line_altered += do_sed_command(&sed_cmds[i], line);
+ still_in_range = 1;
+ if (regexec(sed_cmds[i].end_match, line, 0, NULL, 0) == 0)
+ still_in_range = 0;
}
+ }
- stopNow = TRUE;
- break;
+ /* are we trying to match a single line? */
+ else if (sed_cmds[i].beg_match) {
+ if (regexec(sed_cmds[i].beg_match, line, 0, NULL, 0) == 0)
+ line_altered += do_sed_command(&sed_cmds[i], line);
+ }
- default:
- usage(sed_usage);
+ /* 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)
+ line_altered += do_sed_command(&sed_cmds[i], line);
}
- }
- }
- if (argc == 0) {
- switch (sed_f) {
- case f_none:
- break;
- case f_replace:
- do_sed_repl(stdin, needle, newNeedle, ignoreCase, printFlag,
- quietFlag);
- break;
- case f_append:
- do_sed_append(stdin, appendline, quietFlag);
- break;
- }
- } else {
- while (argc-- > 0) {
- name = *argv++;
-
- fp = fopen(name, "r");
- if (fp == NULL) {
- perror(name);
- continue;
+ /* are we acting on a specified line number */
+ else if (sed_cmds[i].beg_line > 0) {
+ if (linenum == sed_cmds[i].beg_line)
+ line_altered += do_sed_command(&sed_cmds[i], line);
}
- switch (sed_f) {
- case f_none:
+ /* not acting on matches or line numbers. act on every line */
+ else
+ 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) */
+ if (!be_quiet && !line_altered)
+ fputs(line, stdout);
+
+ free(line);
+ }
+}
+
+extern int sed_main(int argc, char **argv)
+{
+ int opt;
+
+ /* do special-case option parsing */
+ if (argv[1] && (strcmp(argv[1], "--help") == 0))
+ usage(sed_usage);
+
+ /* do normal option parsing */
+ while ((opt = getopt(argc, argv, "Vhne:f:")) > 0) {
+ switch (opt) {
+ case 'V':
+ printf("Print Busybox version here\n");
+ exit(0);
break;
- case f_replace:
- do_sed_repl(fp, needle, newNeedle, ignoreCase, printFlag,
- quietFlag);
+ case 'h':
+ usage(sed_usage);
break;
- case f_append:
- do_sed_append(fp, appendline, quietFlag);
+ case 'n':
+ be_quiet++;
break;
- }
+ case 'e':
+ add_cmd_str(optarg);
+ break;
+ case 'f':
+ load_cmd_file(optarg);
+ break;
+ }
+ }
+
+ /* if we didn't get a pattern from a -e and no command file was specified,
+ * argv[optind] should be the pattern. no pattern, no worky */
+ if (ncmds == 0) {
+ if (argv[optind] == NULL)
+ usage(sed_usage);
+ else {
+ add_cmd_str(argv[optind]);
+ optind++;
+ }
+ }
- if (ferror(fp))
- perror(name);
- fclose(fp);
+ /* argv[(optind)..(argc-1)] should be names of file to process. If no
+ * files were specified or '-' was specified, take input from stdin.
+ * Otherwise, we process all the files specified. */
+ if (argv[optind] == NULL || (strcmp(argv[optind], "-") == 0)) {
+ process_file(stdin);
+ }
+ else {
+ int i;
+ FILE *file;
+ for (i = optind; i < argc; i++) {
+ file = fopen(argv[i], "r");
+ if (file == NULL) {
+ fprintf(stderr, "sed: %s: %s\n", argv[i], strerror(errno));
+ } else {
+ process_file(file);
+ fclose(file);
+ }
}
}
- return(TRUE);
-}
+
+ exit_sed(0, NULL);
+ /* not reached */
+ return 0;
+}
-/* END CODE */
+#ifdef TEST_SED
+int main(int argc, char **argv)
+{
+ return sed_main(argc, argv);
+}
+#endif
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-12 19:24:59 +0000