diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/i386/setresuid.c')
| -rw-r--r-- | sysdeps/unix/sysv/linux/i386/setresuid.c | 33 |
1 files changed, 32 insertions, 1 deletions
diff --git a/sysdeps/unix/sysv/linux/i386/setresuid.c b/sysdeps/unix/sysv/linux/i386/setresuid.c index 953b8294d6..90214526ab 100644 --- a/sysdeps/unix/sysv/linux/i386/setresuid.c +++ b/sysdeps/unix/sysv/linux/i386/setresuid.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 @@ -24,14 +24,44 @@ #include <sysdep.h> #include <sys/syscall.h> +#include "kernel-features.h" + #ifdef __NR_setresuid extern int __syscall_setresuid (__kernel_uid_t rgid, __kernel_uid_t egid, __kernel_uid_t sgid); +# ifdef __NR_setresuid32 +extern int __syscall_setresuid32 (__kernel_uid32_t rgid, __kernel_uid32_t egid, + __kernel_uid32_t sgid); +# 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_setresuid32 */ + int __setresuid (uid_t ruid, uid_t euid, uid_t suid) { +# if __ASSUME_32BITUIDS > 0 + return INLINE_SYSCALL (setresuid32, 3, ruid, euid, suid); +# else +# ifdef __NR_setresuid32 + if (!__libc_missing_32bit_uids) + { + int result; + int saved_errno = errno; + + result = INLINE_SYSCALL (setresuid32, 3, ruid, euid, suid); + if (result == 0 || errno != ENOSYS) + return result; + + __set_errno (saved_errno); + __libc_missing_32bit_uids = 1; + } +# endif /* __NR_setresuid32 */ + if ((ruid != (uid_t) -1 && ruid != (uid_t) (__kernel_uid_t) ruid) || (euid != (uid_t) -1 && euid != (uid_t) (__kernel_uid_t) euid) || (suid != (uid_t) -1 && suid != (uid_t) (__kernel_uid_t) suid)) @@ -41,6 +71,7 @@ __setresuid (uid_t ruid, uid_t euid, uid_t suid) } return INLINE_SYSCALL (setresuid, 3, ruid, euid, suid); +# endif } weak_alias (__setresuid, setresuid) #endif |