chmod not descending into subdirs/following symlinks

From: <jan.niemann(at)tu-bs.de>
Date: Sat May 17 2003 - 22:19:46 EDT

hello,

chmod -R doesn't descend into directories it has access to. this is especially nasty when i want it to follow symlinks.

Example :

jan $ mkdir test
jan $ touch test/file target
jan $ ln -s ../target test/link
jan $ chmod -RL 777 test
jan $ ls -lR             

total 2
-rwxrwxrwx 1 jan jan 0 May 18 04:13 target* drwxrwxrwx 2 jan jan 512 May 18 04:13 test/

./test:
total 0
-rwxrwxrwx 1 jan jan 0 May 18 04:13 file* lrwxr-xr-x 1 jan jan 9 May 18 04:13 link@ -> ../target jan $ chmod -RL 444 test
chmod: test/file: Permission denied
chmod: test/link: Permission denied
jan $ sudo ls -lR
total 2
-rwxrwxrwx 1 jan jan 0 May 18 04:13 target dr--r--r-- 2 jan jan 512 May 18 04:13 test

./test:
total 0
-rwxrwxrwx 1 jan jan 0 May 18 04:13 file lrwxr-xr-x 1 jan jan 9 May 18 04:13 link -> ../target

my idea was to try to set permissions on directories to 0500 in pre-order traversal and set correct permissions in postorder.

i really hope that someone has a better idea for this...

Index: chmod.c

---

RCS file: /cvs/src/bin/chmod/chmod.c,v
retrieving revision 1.14
diff -r1.14 chmod.c
69,71c69,71

< gid_t a_gid(const char *);
< uid_t a_uid(const char *);
< void usage(void);

---

> static gid_t a_gid(const char *);

> static uid_t a_uid(const char *);

> static void usage(void);


81c81
<       int Hflag, Lflag, Pflag, Rflag, ch, fflag, fts_options, hflag, rval;
---


>       int Hflag, Lflag, Rflag, ch, fflag, fts_options, hflag, rval;


100c100
<       Hflag = Lflag = Pflag = Rflag = fflag = hflag = 0;
---


>       Hflag = Lflag = Rflag = fflag = hflag = 0;


105c105
<                       Lflag = Pflag = 0;
---


>                       Lflag = 0;


109c109
<                       Hflag = Pflag = 0;
---


>                       Hflag = 0;


112d111
<                       Pflag = 1;
227,230c226,234
<                       if (ischmod)
<                               break;
<                       else
<                               continue;
---

>                       if (ischmod) {

>                               /*

>                                * a silent chmod allows access to all

>                                * subdirs, correct permissions are set during

>                                * post-order traversal

>                                */

>                               chmod(p->fts_path, S_IRUSR|S_IXUSR);

>                       }

>                       continue;


237,238d240
<                               continue;
<                       else
285c287
< uid_t
---


> static uid_t


307c309
< gid_t
---


> static gid_t


329c331
< void
---


> static void

Received on Sat May 17 22:23:01 2003