diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/i386/setuid.c')
| -rw-r--r-- | sysdeps/unix/sysv/linux/i386/setuid.c | 31 |
1 files changed, 30 insertions, 1 deletions
diff --git a/sysdeps/unix/sysv/linux/i386/setuid.c b/sysdeps/unix/sysv/linux/i386/setuid.c index 5e5346ca42..ed0d8fa0bd 100644 --- a/sysdeps/unix/sysv/linux/i386/setuid.c +++ b/sysdeps/unix/sysv/linux/i386/setuid.c @@ -1,4 +1,4 @@ -/* Copyright (C) 1998 Free Software Foundation, Inc. +/* Copyright (C) 1998, 2000 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -24,12 +24,40 @@ #include <sys/syscall.h> #include <linux/posix_types.h> +#include "kernel-features.h" extern int __syscall_setuid (__kernel_uid_t); +#ifdef __NR_setuid32 +extern int __syscall_setuid32 (__kernel_uid32_t); +# if __ASSUME_32BITUIDS == 0 +/* This variable is shared with all files that need to check for 32bit + uids. */ +extern int __libc_missing_32bit_uids; +# endif +#endif /* __NR_setuid32 */ + int __setuid (uid_t uid) { +#if __ASSUME_32BITUIDS > 0 + return INLINE_SYSCALL (setuid32, 1, uid); +#else +# ifdef __NR_setuid32 + if (!__libc_missing_32bit_uids) + { + int result; + int saved_errno = errno; + + result = INLINE_SYSCALL (setuid32, 1, uid); + if (result == 0 || errno != ENOSYS) + return result; + + __set_errno (saved_errno); + __libc_missing_32bit_uids = 1; + } +# endif /* __NR_setuid32 */ + if (uid == (uid_t) ~0 || uid != (uid_t) ((__kernel_uid_t) uid)) { @@ -38,5 +66,6 @@ __setuid (uid_t uid) } return INLINE_SYSCALL (setuid, 1, uid); +#endif } weak_alias (__setuid, setuid) |