Date: Tue, 28 Oct 1997 16:33:19 +0100 From: Wolfram Schneider <schneider@zib.de> To: Ollivier Robert <roberto@keltia.freenix.fr> Cc: freebsd-fs@FreeBSD.ORG Subject: Re: disabled symlinks Message-ID: <199710281533.QAA04035@soft13.zib.de> In-Reply-To: <19971027001140.31561@keltia.freenix.fr> References: <199710261041.LAA00556@panke.panke.de> <19971027001140.31561@keltia.freenix.fr>
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Ollivier Robert writes:
>According to Wolfram Schneider:
>> The nosymlink flag do not allow the creation of a symlink
>> on the mounted file system.
>Could you please modify your patch not to _follow_ symlinks in order to
>disallow all symlinks in a given FS ?
The patch return 'Permission denied' for symlinks in the
kernel function namei/lookup.
Index: vfs_lookup.c
===================================================================
RCS file: /usr/cvs/src/sys/kern/vfs_lookup.c,v
retrieving revision 1.11.4.1
diff -u -r1.11.4.1 vfs_lookup.c
--- vfs_lookup.c 1996/12/03 15:48:25 1.11.4.1
+++ vfs_lookup.c 1997/10/27 14:51:56
@@ -493,6 +493,10 @@
((cnp->cn_flags & FOLLOW) || trailing_slash ||
*ndp->ni_next == '/')) {
cnp->cn_flags |= ISSYMLINK;
+ if (dp->v_mount->mnt_flag & MNT_NOSYMLINK) {
+ error = EACCES;
+ goto bad2;
+ }
return (0);
}
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