From: "Jan (yac) Matějka" <JMatejka@xxxxxxx>
---
misc-utils/rename.1 | 3 ++
misc-utils/rename.c | 69 +++++++++++++++++++++++++++++++++++++++++---------
2 files changed, 59 insertions(+), 13 deletions(-)
diff --git a/misc-utils/rename.1 b/misc-utils/rename.1
index 5f86b23..1ce6c12 100644
--- a/misc-utils/rename.1
+++ b/misc-utils/rename.1
@@ -21,6 +21,9 @@ Give visual feedback which files where renamed, if any.
\fB\-V\fR, \fB\-\-version\fR
Display version information and exit.
.TP
+\fB\-s\fR, \fB\-\-symlink\fR
+Peform rename on symlink target
+.TP
\fB\-h\fR, \fB\-\-help\fR
Display help text and exit.
.SH EXAMPLES
diff --git a/misc-utils/rename.c b/misc-utils/rename.c
index b17e03b..c71fab1 100644
--- a/misc-utils/rename.c
+++ b/misc-utils/rename.c
@@ -18,27 +18,55 @@ for i in $@; do N=`echo "$i" | sed "s/$FROM/$TO/g"`; mv "$i" "$N"; done
#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)
+static int do_rename(char *from, char *to, char *s, int verbose, int symlink_)
{
- char *newname, *where, *p, *q;
+ char *newname, *where, *p, *q, *target;
int flen, tlen, slen;
+ struct stat sb;
+
+ if (symlink_) {
+ if (lstat(s, &sb) == -1) {
+ err(EXIT_FAILURE, _("lstat failed"));
+ }
+
+ if(!S_ISLNK(sb.st_mode))
+ /* Check the file is symlink before allocating the size of it */
+ errx(EXIT_FAILURE, _("%s is not a symbolic link"), s);
+
+ target = xmalloc(sb.st_size + 1);
+ if(0 > readlink(s, target, sb.st_size+1)) {
+ err(EXIT_FAILURE, _("readlink %s failed"), s);
+ }
+ target[sb.st_size] = '\0';
+
+ where = strstr(target, from);
+ }else{
+ where = strstr(s, from);
+ }
- where = strstr(s, from);
if (where == NULL)
return 0;
flen = strlen(from);
tlen = strlen(to);
- slen = strlen(s);
+ if(symlink_) {
+ slen = strlen(target);
+ p = target;
+ }else{
+ slen = strlen(s);
+ p = s;
+ }
newname = xmalloc(tlen + slen + 1);
- p = s;
q = newname;
while (p < where)
*q++ = *p++;
@@ -50,11 +78,21 @@ static int do_rename(char *from, char *to, char *s, int verbose)
*q++ = *p++;
*q = 0;
- if (rename(s, newname) != 0)
- err(EXIT_FAILURE, _("renaming %s to %s failed"),
- s, newname);
- if (verbose)
- printf("`%s' -> `%s'\n", s, newname);
+ if(symlink_) {
+ if (0 > unlink(s))
+ err(EXIT_FAILURE, _("unlinking %s failed"), s);
+ if (symlink(newname, s) != 0)
+ err(EXIT_FAILURE, _("symlinking %s to %s failed"), s, newname);
+ if (verbose)
+ printf("%s: `%s' -> `%s'\n", s, target, newname);
+ }else{
+ if (rename(s, newname) != 0)
+ err(EXIT_FAILURE, _("renaming %s to %s failed"),
+ s, newname);
+ if (verbose)
+ printf("`%s' -> `%s'\n", s, newname);
+ }
+
free(newname);
return 1;
@@ -70,6 +108,7 @@ static void __attribute__ ((__noreturn__)) usage(FILE * out)
fputs(_("\nOptions:\n"), out);
fputs(_(" -v, --verbose explain what is being done\n"
" -V, --version output version information and exit\n"
+ " -s, --symlink act on symlink target\n"
" -h, --help display this help and exit\n\n"), out);
exit(out == stderr ? EXIT_FAILURE : EXIT_SUCCESS);
@@ -78,12 +117,13 @@ static void __attribute__ ((__noreturn__)) usage(FILE * out)
int main(int argc, char **argv)
{
char *from, *to;
- int i, c, verbose = 0;
+ int i, c, symlink=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}
};
@@ -92,11 +132,14 @@ int main(int argc, char **argv)
textdomain(PACKAGE);
atexit(close_stdout);
- while ((c = getopt_long(argc, argv, "vVh", longopts, NULL)) != -1)
+ while ((c = getopt_long(argc, argv, "vsVh", longopts, NULL)) != -1)
switch (c) {
case 'v':
verbose = 1;
break;
+ case 's':
+ symlink = 1;
+ break;
case 'V':
printf(_("%s from %s\n"),
program_invocation_short_name,
@@ -120,7 +163,7 @@ int main(int argc, char **argv)
to = argv[1];
for (i = 2; i < argc; i++)
- do_rename(from, to, argv[i], verbose);
+ do_rename(from, to, argv[i], verbose, symlink);
return EXIT_SUCCESS;
}
--
1.7.8.6
--
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