diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/i386/seteuid.c')
| -rw-r--r-- | sysdeps/unix/sysv/linux/i386/seteuid.c | 28 |
1 files changed, 24 insertions, 4 deletions
diff --git a/sysdeps/unix/sysv/linux/i386/seteuid.c b/sysdeps/unix/sysv/linux/i386/seteuid.c index 87e348a646..0abdac832f 100644 --- a/sysdeps/unix/sysv/linux/i386/seteuid.c +++ b/sysdeps/unix/sysv/linux/i386/seteuid.c @@ -1,4 +1,4 @@ -/* Copyright (C) 1998, 2000, 2002, 2003 Free Software Foundation, Inc. +/* Copyright (C) 1998, 2000, 2002, 2003, 2004 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 @@ -22,6 +22,7 @@ #include <sysdep.h> #include "kernel-features.h" +#include <pthread-functions.h> #ifdef __NR_setresuid @@ -31,10 +32,17 @@ extern int __setresuid (uid_t ruid, uid_t euid, uid_t suid); int seteuid (uid_t uid) { + int result; + + if (uid == (uid_t) ~0) + { + __set_errno (EINVAL); + return -1; + } + #if __ASSUME_32BITUIDS > 0 - return INLINE_SYSCALL (setresuid32, 3, -1, uid, -1); + result = INLINE_SYSCALL (setresuid32, 3, -1, uid, -1); #else - int result; /* First try the syscall. */ # ifdef __NR_setresuid result = __setresuid (-1, uid, -1); @@ -48,8 +56,20 @@ seteuid (uid_t uid) equal to the real user ID, making it impossible to switch back. */ # endif result = __setreuid (-1, uid); +#endif - return result; +#if defined HAVE_PTR__NPTL_SETXID && !defined SINGLE_THREAD + if (result == 0 && __libc_pthread_functions.ptr__nptl_setxid != NULL) + { + struct xid_command cmd; + cmd.syscall_no = __NR_setresuid32; + cmd.id[0] = -1; + cmd.id[1] = uid; + cmd.id[2] = -1; + __libc_pthread_functions.ptr__nptl_setxid (&cmd); + } #endif + + return result; } libc_hidden_def (seteuid) |