Update.

1998-07-31 17:59  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/unix/sysv/linux/Makefile [subdir==misc] (sysdep_routines):
	Add sys_setresuid.

1998-07-30  Mark Kettenis  <kettenis@phys.uva.nl>

	* sysdeps/unix/sysv/linux/syscalls.list: Add __syscall_setresuid
	as real name for system call and make setresuid a weak alias.  Set
	caller to seteuid.
	* sysdeps/unix/sysv/linux/seteuid.c (seteuid): Implement using
	`setresuid' syscall if availble.  Fixes problems with sendmail
	which expects `seteuid' to not set the saved user ID.

1998-07-30 20:09 -0400  Zack Weinberg  <zack@rabi.phys.columbia.edu>

	* time/tzset.c (__tzstring): Get rid of excessive cleverness
	which was causing stack corruption.

1998-07-31 16:41 -0400  Zack Weinberg  <zack@rabi.phys.columbia.edu>

	* argp/argp-fmtstream.c (__argp_fmtstream_update): Correct
	off-by-one in wordwrap algorithm when there' a space at the
	beginning of the buffer.

1998-07-31 15:45  Ulrich Drepper  <drepper@cygnus.com>

	* Makerules (LDLIBS-c.so): Extend value instead of overwriting it.

3 files changed, 53 insertions, 3 deletions

diff --git a/sysdeps/unix/sysv/linux/Makefile b/sysdeps/unix/sysv/linux/Makefile
index 7de1008716..af53184cb2 100644
--- a/sysdeps/unix/sysv/linux/Makefile
+++ b/sysdeps/unix/sysv/linux/Makefile
@@ -9,7 +9,7 @@ CPPFLAGS += -DHAVE_LLSEEK=1
 endif
 
 ifeq ($(subdir),misc)
-sysdep_routines += sysctl clone llseek getresuid getresgid
+sysdep_routines += sysctl clone llseek getresuid getresgid sys_setresuid
 
 sysdep_headers += sys/mount.h sys/acct.h sys/sysctl.h sys/mtio.h \
 		  sys/io.h sys/klog.h sys/kdaemon.h \
diff --git a/sysdeps/unix/sysv/linux/seteuid.c b/sysdeps/unix/sysv/linux/seteuid.c
index 37fb72c020..c8e3950cfa 100644
--- a/sysdeps/unix/sysv/linux/seteuid.c
+++ b/sysdeps/unix/sysv/linux/seteuid.c
@@ -1 +1,51 @@
-#include <sysdeps/unix/bsd/seteuid.c>
+/* Copyright (C) 1998 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
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <errno.h>
+#include <sys/syscall.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#ifdef __NR_setresuid
+
+extern int __syscall_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;
+    }
+
+  /* First try the syscall.  */
+  result = __syscall_setresuid (-1, uid, -1);
+  if (result == -1 && errno == ENOSYS)
+    /* 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.  */
+    result = __setreuid (-1, uid);
+
+  return result;
+}
+#else
+# include <sysdeps/unix/bsd/seteuid.c>
+#endif
diff --git a/sysdeps/unix/sysv/linux/syscalls.list b/sysdeps/unix/sysv/linux/syscalls.list
index e80fd84568..6d06d0df99 100644
--- a/sysdeps/unix/sysv/linux/syscalls.list
+++ b/sysdeps/unix/sysv/linux/syscalls.list
@@ -71,12 +71,12 @@ setfsgid	EXTRA	setfsgid	1	setfsgid
 setfsuid	EXTRA	setfsuid	1	setfsuid
 setpgid		-	setpgid		2	__setpgid	setpgid
 setresgid	EXTRA	setresgid	3	setresgid
-setresuid	EXTRA	setresuid	3	setresuid
 sigaltstack	-	sigaltstack	2	__sigaltstack	sigaltstack
 sys_fstat	fxstat	fstat		2	__syscall_fstat
 sys_lstat	lxstat	lstat		2	__syscall_lstat
 sys_mknod	xmknod	mknod		3	__syscall_mknod
 sys_readv	readv	readv		3	__syscall_readv
+sys_setresuid	EXTRA	setresuid	3	__syscall_setresuid
 sys_stat	xstat	stat		2	__syscall_stat
 sys_writev	writev	writev		3	__syscall_writev
 sysinfo		EXTRA	sysinfo		1	sysinfo