Update.

	* 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.

6 files changed, 76 insertions, 16 deletions

diff --git a/sysdeps/unix/sysv/linux/i386/setegid.c b/sysdeps/unix/sysv/linux/i386/setegid.c
index 8d7618cdd6..4dc79c7936 100644
--- a/sysdeps/unix/sysv/linux/i386/setegid.c
+++ b/sysdeps/unix/sysv/linux/i386/setegid.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1995, 96, 97, 98, 2000, 2002 Free Software Foundation, Inc.
+/* Copyright (C) 1995-1998, 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
@@ -16,13 +16,41 @@
    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
    02111-1307 USA.  */
 
+#include <errno.h>
 #include <unistd.h>
 #include <sys/types.h>
 
+#include <sysdep.h>
+#include "kernel-features.h"
+
+
+#ifdef __NR_setresgid
+extern int __setresgid (uid_t rgid, uid_t egid, uid_t sgid);
+#endif
+
 int
 setegid (gid)
      gid_t gid;
 {
-  return __setregid (-1, gid);
+#if __ASSUME_32BITUIDS > 0
+  return INLINE_SYSCALL (setresgid32, 3, -1, gid, -1);
+#else
+  int result;
+  /* First try the syscall.  */
+# ifdef __NR_setresgid
+  result = __setresgid (-1, gid, -1);
+#  if __ASSUME_SETRESUID_SYSCALL > 0
+  if (0)
+#  else
+  if (result == -1 && errno == ENOSYS)
+#  endif
+    /* No system call available.  Use emulation.  This may not work
+       since `setregid' also sets the saved user ID when GID is not
+       equal to the real user ID, making it impossible to switch back.  */
+# endif
+    result = __setregid (-1, gid);
+
+  return result;
+#endif
 }
 libc_hidden_def (setegid)
diff --git a/sysdeps/unix/sysv/linux/i386/seteuid.c b/sysdeps/unix/sysv/linux/i386/seteuid.c
index ba0b86d318..87e348a646 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 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)
diff --git a/sysdeps/unix/sysv/linux/i386/setregid.c b/sysdeps/unix/sysv/linux/i386/setregid.c
index d49bf47b9d..343bbf4b40 100644
--- a/sysdeps/unix/sysv/linux/i386/setregid.c
+++ b/sysdeps/unix/sysv/linux/i386/setregid.c
@@ -44,7 +44,7 @@ __setregid (gid_t rgid, gid_t egid)
 #if __ASSUME_32BITUIDS > 0
   return INLINE_SYSCALL (setresgid32, 3, rgid, egid, -1);
 #else
-# ifdef __NR_setregid32
+# ifdef __NR_setresgid32
   if (__libc_missing_32bit_uids <= 0)
     {
       int result;
@@ -66,7 +66,13 @@ __setregid (gid_t rgid, gid_t egid)
       return -1;
     }
 
-  return INLINE_SYSCALL (setresgid, 3, rgid, egid, -1);
+# ifdef __NR_setresgid
+  int result = INLINE_SYSCALL (setresgid, 3, rgid, egid, -1);
+# endif
+  if (result == -1 && errno == ENOSYS)
+    result = INLINE_SYSCALL (setregid, 2, rgid, egid);
+
+  return result;
 #endif
 }
 weak_alias (__setregid, setregid)
diff --git a/sysdeps/unix/sysv/linux/i386/setreuid.c b/sysdeps/unix/sysv/linux/i386/setreuid.c
index 04496c8404..0867170e49 100644
--- a/sysdeps/unix/sysv/linux/i386/setreuid.c
+++ b/sysdeps/unix/sysv/linux/i386/setreuid.c
@@ -44,7 +44,7 @@ __setreuid (uid_t ruid, uid_t euid)
 #if __ASSUME_32BITUIDS > 0
   return INLINE_SYSCALL (setresuid32, 3, ruid, euid, -1);
 #else
-# ifdef __NR_setreuid32
+# ifdef __NR_setresuid32
   if (__libc_missing_32bit_uids <= 0)
     {
       int result;
@@ -66,7 +66,13 @@ __setreuid (uid_t ruid, uid_t euid)
       return -1;
     }
 
-  return INLINE_SYSCALL (setresuid, 3, ruid, euid, -1);
+# ifdef __NR_setresuid
+  itn result = INLINE_SYSCALL (setresuid, 3, ruid, euid, -1);
+# endif
+  if (result == -1 && errno == ENOSYS)
+    result = INLINE_SYSCALL (setreuid, 2, ruid, euid);
+
+  return result;
 #endif
 }
 weak_alias (__setreuid, setreuid)
diff --git a/sysdeps/unix/sysv/linux/setegid.c b/sysdeps/unix/sysv/linux/setegid.c
index c4b114eb07..6643a9da79 100644
--- a/sysdeps/unix/sysv/linux/setegid.c
+++ b/sysdeps/unix/sysv/linux/setegid.c
@@ -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
@@ -21,7 +21,10 @@
 #include <sys/types.h>
 #include <unistd.h>
 
-#ifdef __NR_setresgid
+#include <sysdep.h>
+#include "kernel-features.h"
+
+#if defined __NR_setresgid || __ASSUME_SETRESUID_SYSCALL > 0
 
 extern int __setresgid (gid_t rgid, gid_t egid, gid_t sgid);
 
@@ -36,15 +39,21 @@ setegid (gid_t gid)
       return -1;
     }
 
+# if __ASSUME_32BITUIDS > 0
+  return INLINE_SYSCALL (setresgid32, 3, -1, gid, -1);
+# else
   /* First try the syscall.  */
   result = __setresgid (-1, gid, -1);
+#  if __ASSUME_SETRESUID_SYSCALL == 0
   if (result == -1 && errno == ENOSYS)
     /* No system call available.  Use emulation.  This may not work
        since `setregid' also sets the saved group ID when GID is not
        equal to the real group ID, making it impossible to switch back. */
     result = __setregid (-1, gid);
+#  endif
 
   return result;
+# endif
 }
 libc_hidden_def (setegid)
 #else
diff --git a/sysdeps/unix/sysv/linux/seteuid.c b/sysdeps/unix/sysv/linux/seteuid.c
index ab9819b8f9..6570740af7 100644
--- a/sysdeps/unix/sysv/linux/seteuid.c
+++ b/sysdeps/unix/sysv/linux/seteuid.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1998, 1999, 2002 Free Software Foundation, Inc.
+/* Copyright (C) 1998, 1999, 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
@@ -21,6 +21,7 @@
 #include <sys/types.h>
 #include <unistd.h>
 
+#include <sysdep.h>
 #include "kernel-features.h"
 
 #if defined __NR_setresuid || __ASSUME_SETRESUID_SYSCALL > 0
@@ -38,6 +39,9 @@ seteuid (uid_t uid)
       return -1;
     }
 
+# if __ASSUME_32BITUIDS > 0
+  return INLINE_SYSCALL (setresuid32, 3, -1, uid, -1);
+# else
   /* First try the syscall.  */
   result = __setresuid (-1, uid, -1);
 # if __ASSUME_SETRESUID_SYSCALL == 0
@@ -49,6 +53,7 @@ seteuid (uid_t uid)
 # endif
 
   return result;
+# endif
 }
 libc_hidden_def (seteuid)
 #else