Author: pjd
Date: Sat Mar 16 23:19:13 2013
New Revision: 248397
URL: http://svnweb.freebsd.org/changeset/base/248397
Log:
Require CAP_SEEK if both O_APPEND and O_TRUNC flags are absent.
In other words we don't require CAP_SEEK if either O_APPEND or O_TRUNC flag is
given, because O_APPEND doesn't allow to overwrite existing data and O_TRUNC
requires CAP_FTRUNCATE already.
Sponsored by: The FreeBSD Foundation
Modified:
head/sys/kern/vfs_syscalls.c
Modified: head/sys/kern/vfs_syscalls.c
==============================================================================
--- head/sys/kern/vfs_syscalls.c Sat Mar 16 23:13:49 2013
(r248396)
+++ head/sys/kern/vfs_syscalls.c Sat Mar 16 23:19:13 2013
(r248397)
@@ -971,7 +971,7 @@ flags_to_rights(int flags)
/* FALLTHROUGH */
case O_WRONLY:
rights |= CAP_WRITE;
- if (!(flags & O_APPEND))
+ if (!(flags & (O_APPEND | O_TRUNC)))
rights |= CAP_SEEK;
break;
}
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