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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"
#define RENAME_EXIT_SOMEOK 2
#define RENAME_EXIT_NOTHING 4
#define RENAME_EXIT_UNEXPLAINED 64
static int string_replace(char *from, char *to, char *s, char *orig, char **newname)
{
char *p, *q, *where;
where = strstr(s, from);
if (where == NULL)
return 1;
p = orig;
*newname = xmalloc(strlen(orig) + strlen(to) + 1);
q = *newname;
while (p < where)
*q++ = *p++;
p = to;
while (*p)
*q++ = *p++;
p = where + strlen(from);
while (*p)
*q++ = *p++;
*q = 0;
return 0;
}
static int do_symlink(char *from, char *to, char *s, int verbose)
{
char *newname = NULL, *target = NULL;
int ret = 1;
struct stat sb;
if (lstat(s, &sb) == -1) {
warn(_("stat of %s failed"), s);
return 2;
}
if (!S_ISLNK(sb.st_mode)) {
warnx(_("%s: not a symbolic link"), s);
return 2;
}
target = xmalloc(sb.st_size + 1);
if (readlink(s, target, sb.st_size + 1) < 0) {
warn(_("%s: readlink failed"), s);
free(target);
return 2;
}
target[sb.st_size] = '\0';
if (string_replace(from, to, target, target, &newname))
ret = 0;
else if (0 > unlink(s)) {
warn(_("%s: unlink failed"), s);
ret = 2;
} else if (symlink(newname, s) != 0) {
warn(_("%s: symlinking to %s failed"), s, newname);
ret = 2;
}
if (verbose && ret == 1)
printf("%s: `%s' -> `%s'\n", s, target, newname);
free(newname);
free(target);
return ret;
}
static int do_file(char *from, char *to, char *s, int verbose)
{
char *newname = NULL, *file=NULL;
int ret = 1;
if (strchr(from, '/') == NULL && strchr(to, '/') == NULL)
file = strrchr(s, '/');
if (file == NULL)
file = s;
if (string_replace(from, to, file, s, &newname))
return 0;
else if (rename(s, newname) != 0) {
warn(_("%s: rename to %s failed"), s, newname);
ret = 2;
}
if (verbose && ret == 1)
printf("`%s' -> `%s'\n", s, newname);
free(newname);
return ret;
}
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_SEPARATOR, out);
fputs(_("Rename files.\n"), out);
fputs(USAGE_OPTIONS, out);
fputs(_(" -v, --verbose explain what is being done\n"), out);
fputs(_(" -s, --symlink act on the target of symlinks\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, ret = 0, verbose = 0;
int (*do_rename)(char *from, char *to, char *s, int verbose) = do_file;
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':
do_rename = do_symlink;
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++)
ret |= do_rename(from, to, argv[i], verbose);
switch (ret) {
case 0:
return RENAME_EXIT_NOTHING;
case 1:
return EXIT_SUCCESS;
case 2:
return EXIT_FAILURE;
case 3:
return RENAME_EXIT_SOMEOK;
default:
return RENAME_EXIT_UNEXPLAINED;
}
}
|
