Matt Mackall wrote:
On Wed, Nov 16, 2005 at 07:21:30AM -0600, Rob Landley wrote:
Is there an easy way to make sure our programs aren't using these? (If I
build a new system from source with busybox and uclibc, how do I know if I
can disable this?)
These should only be found in legacy binaries, ie 5+ years old.
Not true, unfortunately. To make uClibc work with linux-tiny
and [ug]id16 disabled one has to apply patches like this.
uClibc probably assumes 16 bit __kernel_[ug]id_t and uses
legacy syscalls exclusively.
--- uClibc-0.9.28/libc/sysdeps/linux/common/chown.c
+++ uclibc/libc/sysdeps/linux/common/chown.c
@@ -10,16 +10,11 @@
#include "syscalls.h"
#include <unistd.h>
-#define __NR___syscall_chown __NR_chown
+#define __NR___syscall_chown __NR_chown32
static inline _syscall3(int, __syscall_chown, const char *, path,
__kernel_uid_t, owner, __kernel_gid_t, group);
int chown(const char *path, uid_t owner, gid_t group)
{
- if (((owner + 1) > (uid_t) ((__kernel_uid_t) - 1U))
- || ((group + 1) > (gid_t) ((__kernel_gid_t) - 1U))) {
- __set_errno(EINVAL);
- return -1;
- }
return (__syscall_chown(path, owner, group));
}
--
Zdenek Pavlas
NEXTRA Czech Republic s.r.o. http://www.nextra.cz
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