Update.

1998-04-02  Ulrich Drepper  <drepper@cygnus.com>

	* stdlib/isomac.c: Use -isystem instead of -I for system include
	dir.

1998-03-30 08:05  H.J. Lu  <hjl@gnu.org>

	* resolv/res_comp.c (underscorechar): New.
	(middlechar): Allow '_'.

1998-04-02  Ulrich Drepper  <drepper@cygnus.com>

	* intl/explodename.c (stdlib.h): Include that file only if
	STDC_HEADERS or _LIBC.
	(string.h): Include that file only if HAVE_STRING_H or _LIBC.
	Patch by Philippe De Muyter <phdm@macqel.be>.

1998-04-01 21:08  Zack Weinberg  <zack@rabi.phys.columbia.edu>

	* aclocal.m4 (AC_PROG_CC_LOCAL): Remove superfluous tests.
	(AC_PROG_CHECK_VER): New macro.
	* configure.in: Use AC_PROG_CHECK_VER to check versions of
	gcc, gmake, msgfmt, makeinfo.  Remove superfluous tests.

1998-04-02 15:13  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/unix/sysv/linux/i386/i686/sysdep.h: New file.
	* sysdeps/i386/i686/strtok.S: New file
	* sysdeps/i386/i686/strtok_r.S: New file

1998-04-02  Mark Kettenis  <kettenis@phys.uva.nl>

	* posix/unistd.h: [__USE_FILE_OFFSET64] (lseek): Change return
	type to __off64_t.
	* libio/stdio.h [__USE_FILE_OFFSET64] (fseeko): Declare offset
	parameter as __off64_t instead of __off_t.
	(ftello): Make alias for ftello64 instead of ftello.  Change
	return type to __off64_t.

1998-04-02  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/i386/bits/string.h: Fix various typos.
	Patch by Horst von Brand <vonbrand@sleipnir.valparaiso.cl>.

	* sysdeps/unix/sysv/linux/getcwd.c: Use getcwd syscall in Linux 2.1.92.

1998-04-02  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/unix/sysv/linux/i386/chown.c: Handle old kernels without
	lchown syscall correctly.  [PR libc/541].

4 files changed, 138 insertions, 8 deletions

diff --git a/sysdeps/unix/sysv/linux/getcwd.c b/sysdeps/unix/sysv/linux/getcwd.c
index ed649f8fef..0bf9a9fb0e 100644
--- a/sysdeps/unix/sysv/linux/getcwd.c
+++ b/sysdeps/unix/sysv/linux/getcwd.c
@@ -1,5 +1,5 @@
 /* Determine current working directory.  Linux version.
-   Copyright (C) 1997 Free Software Foundation, Inc.
+   Copyright (C) 1997, 1998 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
 
@@ -22,6 +22,7 @@
 #include <limits.h>
 #include <stdlib.h>
 #include <unistd.h>
+#include <sys/syscall.h>
 
 
 /* The "proc" filesystem provides an easy method to retrieve the value.
@@ -31,10 +32,20 @@
    the proc filesystem mounted.  Use the POSIX implementation in this case.  */
 static char *generic_getcwd (char *buf, size_t size) internal_function;
 
+#ifdef __NR_getcwd
+/* Kernel 2.1.92 introduced a third way to get the current working
+   directory: a syscall.  We've got to be careful that even when
+   compiling under 2.1.92+ the libc still runs under older kernels. */
+extern int __syscall_getcwd (char *buf, unsigned long size);
+static no_syscall_getcwd;
+static int no_new_dcache = 1;
+#else
+static int no_new_dcache;
+#endif
+
 char *
 __getcwd (char *buf, size_t size)
 {
-  static int no_new_dcache = 0;
   int save_errno;
   char *path;
   int n;
@@ -66,6 +77,41 @@ __getcwd (char *buf, size_t size)
 
   save_errno = errno;
 
+#ifdef __NR_getcwd
+  if (!no_syscall_getcwd)
+    {
+      int retval;
+
+      do
+      retval = __syscall_getcwd (path, alloc_size);
+      if (retval >= 0)
+	{
+	  if (buf == NULL)
+	    {
+	      buf = realloc (path, strlen (path) + 1);
+	      if (buf == NULL)
+		/* `relloc' failed but we still have the original string.  */
+		buf = path;
+	    }
+	  return buf;
+	}
+
+      if (errno == ENOSYS)
+	{
+	   no_syscall_getcwd = 1;
+	   no_new_dcache = 0;	/* Now we will try the /proc method.  */
+	}
+      else if (errno != ERANGE || buf != NULL)
+	{
+	  if (buf == NULL)
+	    free (path);
+	  return NULL;
+	}
+
+      __set_errno (save_errno);
+    }
+#endif
+
   n = __readlink ("/proc/self/cwd", path, alloc_size - 1);
   if (n != -1)
     {
@@ -79,7 +125,14 @@ __getcwd (char *buf, size_t size)
 	    }
 
 	  path[n] = '\0';
-	  return buf ?: (char *) realloc (path, (size_t) n + 1);
+	  if (buf == NULL)
+	    {
+	      buf = realloc (path, (size_t) n + 1);
+	      if (buf == NULL)
+		/* `relloc' failed but we still have the original string.  */
+		buf = path;
+	    }
+	  return buf;
 	}
       else
 	no_new_dcache = 1;
diff --git a/sysdeps/unix/sysv/linux/i386/chown.c b/sysdeps/unix/sysv/linux/i386/chown.c
index e985ce0dae..7536b26923 100644
--- a/sysdeps/unix/sysv/linux/i386/chown.c
+++ b/sysdeps/unix/sysv/linux/i386/chown.c
@@ -59,9 +59,15 @@ __real_chown (const char *file, uid_t owner, gid_t group)
 #endif
 
 
-#if !defined __NR_lchown || \
-    (defined HAVE_ELF && defined PIC && defined DO_VERSIONING)
-/* compiling under older kernels or for compatibiity */
+#ifndef __NR_lchown
+/* Compiling under older kernels.  */
+int
+__chown_is_lchown (const char *file, uid_t owner, gid_t group)
+{
+  return __syscall_chown (file, owner, group);
+}
+#elif defined HAVE_ELF && defined PIC && defined DO_VERSIONING
+/* Compiling for compatibiity.  */
 int
 __chown_is_lchown (const char *file, uid_t owner, gid_t group)
 {
diff --git a/sysdeps/unix/sysv/linux/i386/i686/sysdep.h b/sysdeps/unix/sysv/linux/i386/i686/sysdep.h
new file mode 100644
index 0000000000..001f3fc4d7
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/i386/i686/sysdep.h
@@ -0,0 +1,71 @@
+/* Copyright (C) 1998 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper, <drepper@cygnus.com>, 1998.
+
+   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.  */
+
+#ifndef _LINUX_I386_I686_SYSDEP_H
+#define _LINUX_I386_I686_SYSDEP_H 1
+
+/* There is some commonality.  */
+#include <sysdeps/unix/sysv/linux/i386/sysdep.h>
+
+/* We define special versions of the error handler code to match the i686's
+   deep branch prediction mechanism.  */
+#ifdef PIC
+# undef SYSCALL_ERROR_HANDLER
+
+/* Store (- %eax) into errno through the GOT.  */
+# ifdef _LIBC_REENTRANT
+#  define SYSCALL_ERROR_HANDLER						      \
+  .type syscall_error,@function;					      \
+0:movl (%esp),%ebx;							      \
+  ret;									      \
+syscall_error:								      \
+  pushl %ebx;								      \
+  call 0b;								      \
+  addl $_GLOBAL_OFFSET_TABLE_, %ebx;					      \
+  xorl %edx, %edx;							      \
+  subl %eax, %edx;							      \
+  pushl %edx;								      \
+  call __errno_location@PLT;						      \
+  popl %ecx;								      \
+  popl %ebx;								      \
+  movl %ecx, (%eax);							      \
+  movl $-1, %eax;							      \
+  jmp L(pseudo_end);							      \
+  .size syscall_error,.-syscall_error;
+/* A quick note: it is assumed that the call to `__errno_location' does
+   not modify the stack!  */
+# else
+#  define SYSCALL_ERROR_HANDLER						      \
+  .type syscall_error,@function;					      \
+0:movl (%esp),%ecx;							      \
+  ret;									      \
+syscall_error:								      \
+  call 0b;								      \
+  addl $_GLOBAL_OFFSET_TABLE_, %ecx;					      \
+  xorl %edx, %edx;							      \
+  subl %eax, %edx;							      \
+  movl errno@GOT(%ecx), %ecx;						      \
+  movl %edx, (%ecx);							      \
+  movl $-1, %eax;							      \
+  jmp L(pseudo_end);							      \
+  .size syscall_error,.-syscall_error;
+# endif	/* _LIBC_REENTRANT */
+#endif	/* PIC */
+
+#endif /* linux/i386/i686/sysdep.h */
diff --git a/sysdeps/unix/sysv/linux/i386/sysdep.h b/sysdeps/unix/sysv/linux/i386/sysdep.h
index 713bd44524..2bb82a2009 100644
--- a/sysdeps/unix/sysv/linux/i386/sysdep.h
+++ b/sysdeps/unix/sysv/linux/i386/sysdep.h
@@ -140,10 +140,10 @@ syscall_error:								      \
    %ecx and %edx when we have more than 1 and 2 registers resp.
 
    The code below might look a bit long but we have to take care for
-   the pipelined processors (i586 and up).  Here the `pushl' and `popl'
+   the pipelined processors (i586).  Here the `pushl' and `popl'
    instructions are marked as NP (not pairable) but the exception is
    two consecutive of these instruction.  This gives no penalty on
-   i386 and i486 processors though.  */
+   other processors though.  */
 
 #undef	DO_CALL
 #define DO_CALL(args, syscall_name)			      		      \