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* sysdeps/unix/sysv/linux/seteuid.c (seteuid): Use setresuid32
	syscall directly if possible.  If __ASSUME_SETRESUID_SYSCALL is
	defined drop compatibility code.
	* sysdeps/unix/sysv/linux/setegid.c (setegid): Use setresgid32
	syscall directly if possible.  If __ASSUME_SETRESUID_SYSCALL is
	defined drop compatibility code.
	* sysdeps/unix/sysv/linux/i386/seteuid.c (seteuid): Use
	setresuid32 syscall directly if possible.
	* sysdeps/unix/sysv/linux/i386/setegid.c (setegid): Use
	setresgid32 syscall directly if possible.
This commit is contained in:
Ulrich Drepper
2003-06-08 22:37:53 +00:00
parent f0da6a7d5a
commit eae59a5681
7 changed files with 86 additions and 16 deletions
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20
sysdeps/unix/sysv/linux/i386/seteuid.c
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@ -1,4 +1,4 @@
/* Copyright (C) 1998, 2000, 2002 Free Software Foundation, Inc.
/* Copyright (C) 1998, 2000, 2002, 2003 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
@ -17,10 +17,12 @@
02111-1307 USA. */
#include <errno.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <unistd.h>
#include <sysdep.h>
#include "kernel-features.h"
#ifdef __NR_setresuid
extern int __setresuid (uid_t ruid, uid_t euid, uid_t suid);
@ -29,21 +31,25 @@ extern int __setresuid (uid_t ruid, uid_t euid, uid_t suid);
int
seteuid (uid_t uid)
{
#if __ASSUME_32BITUIDS > 0
return INLINE_SYSCALL (setresuid32, 3, -1, uid, -1);
#else
int result;
/* First try the syscall. */
#ifdef __NR_setresuid
# ifdef __NR_setresuid
result = __setresuid (-1, uid, -1);
#if __ASSUME_SETRESUID_SYSCALL > 0
# if __ASSUME_SETRESUID_SYSCALL > 0
if (0)
#else
# else
if (result == -1 && errno == ENOSYS)
#endif
# endif
/* No system call available. Use emulation. This may not work
since `setreuid' also sets the saved user ID when UID is not
equal to the real user ID, making it impossible to switch back. */
#endif
# endif
result = __setreuid (-1, uid);
return result;
#endif
}
libc_hidden_def (seteuid)