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/*
* rename.c - aeb 2000-01-01
*
--------------------------------------------------------------
#!/bin/sh
if [ $# -le 2 ]; then echo call: rename from to files; exit; fi
FROM="$1"
TO="$2"
shift
shift
for i in $@; do N=`echo "$i" | sed "s/$FROM/$TO/g"`; mv "$i" "$N"; done
--------------------------------------------------------------
* This shell script will do renames of files, but may fail
* in cases involving special characters. Here a C version.
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <getopt.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include "nls.h"
#include "xalloc.h"
#include "c.h"
#include "closestream.h"
static int do_rename(char *from, char *to, char *s, int verbose, int symtarget)
{
char *newname, *where, *p, *q, *target;
int flen, tlen, slen;
struct stat sb;
if (symtarget) {
if (lstat(s, &sb) == -1)
err(EXIT_FAILURE, _("%s: lstat failed"), s);
if (!S_ISLNK(sb.st_mode))
errx(EXIT_FAILURE, _("%s: not a symbolic link"), s);
target = xmalloc(sb.st_size + 1);
if (readlink(s, target, sb.st_size + 1) < 0)
err(EXIT_FAILURE, _("%s: readlink failed"), s);
target[sb.st_size] = '\0';
where = strstr(target, from);
} else
where = strstr(s, from);
if (where == NULL)
return 0;
flen = strlen(from);
tlen = strlen(to);
if (symtarget) {
slen = strlen(target);
p = target;
} else {
slen = strlen(s);
p = s;
}
newname = xmalloc(tlen + slen + 1);
q = newname;
while (p < where)
*q++ = *p++;
p = to;
while (*p)
*q++ = *p++;
p = where + flen;
while (*p)
*q++ = *p++;
*q = 0;
if (symtarget) {
if (0 > unlink(s))
err(EXIT_FAILURE, _("%s: unlink failed"), s);
if (symlink(newname, s) != 0)
err(EXIT_FAILURE, _("%s: symlinking to %s failed"), s, newname);
if (verbose)
printf("%s: `%s' -> `%s'\n", s, target, newname);
} else {
if (rename(s, newname) != 0)
err(EXIT_FAILURE, _("%s: rename to %s failed"), s, newname);
if (verbose)
printf("`%s' -> `%s'\n", s, newname);
}
free(newname);
return 1;
}
static void __attribute__ ((__noreturn__)) usage(FILE * out)
{
fputs(USAGE_HEADER, out);
fprintf(out,
_(" %s [options] expression replacement file...\n"),
program_invocation_short_name);
fputs(USAGE_OPTIONS, out);
fputs(_(" -v, --verbose explain what is being done\n"), out);
fputs(_(" -s, --symlink act on symlink target\n"), out);
fputs(USAGE_SEPARATOR, out);
fputs(USAGE_HELP, out);
fputs(USAGE_VERSION, out);
fprintf(out, USAGE_MAN_TAIL("rename(1)"));
exit(out == stderr ? EXIT_FAILURE : EXIT_SUCCESS);
}
int main(int argc, char **argv)
{
char *from, *to;
int i, c, symtarget=0, verbose = 0;
static const struct option longopts[] = {
{"verbose", no_argument, NULL, 'v'},
{"version", no_argument, NULL, 'V'},
{"help", no_argument, NULL, 'h'},
{"symlink", no_argument, NULL, 's'},
{NULL, 0, NULL, 0}
};
setlocale(LC_ALL, "");
bindtextdomain(PACKAGE, LOCALEDIR);
textdomain(PACKAGE);
atexit(close_stdout);
while ((c = getopt_long(argc, argv, "vsVh", longopts, NULL)) != -1)
switch (c) {
case 'v':
verbose = 1;
break;
case 's':
symtarget = 1;
break;
case 'V':
printf(UTIL_LINUX_VERSION);
return EXIT_SUCCESS;
case 'h':
usage(stdout);
default:
usage(stderr);
}
argc -= optind;
argv += optind;
if (argc < 3) {
warnx(_("not enough arguments"));
usage(stderr);
}
from = argv[0];
to = argv[1];
for (i = 2; i < argc; i++)
do_rename(from, to, argv[i], verbose, symtarget);
return EXIT_SUCCESS;
}
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