Messages in this thread Patch in this message | | | Date | Tue, 20 Dec 2005 16:46:44 +0100 | From | Zdenek Pavlas <> | Subject | Re: [PATCH 10/15] misc: Make *[ug]id16 support optional |
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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 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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