Update.

* misc/daemon.c (daemon): Fail if !noclose and we cannot open the
	real /dev/null device.

	* sysdeps/generic/check_fds.c: Include device-nrs.h.
	* sysdeps/generic/device-nrs.h: New file.
	* sysdeps/unix/sysv/linux/device-nrs.h: New file.
	* misc/Makefile (distribute): Add device-nrs.h.

	* posix/wordexp.c (exec_comm_child): Likewise.
	* locale/nl_langinfo.c: Allow use of file for __nl_langinfo_l
	definition.

ChangeLog

@@ -1,5 +1,13 @@
 2000-09-26  Ulrich Drepper  <drepper@redhat.com>
 
+	* misc/daemon.c (daemon): Fail if !noclose and we cannot open the
+	real /dev/null device.
+
+	* sysdeps/generic/check_fds.c: Include device-nrs.h.
+	* sysdeps/generic/device-nrs.h: New file.
+	* sysdeps/unix/sysv/linux/device-nrs.h: New file.
+	* misc/Makefile (distribute): Add device-nrs.h.
+
 	* sysdeps/unix/sysv/linux/gethostid.c (sethostid): Use O_TRUNC to
 	remove possible garbage at the end of the file.
 
@@ -10,15 +18,17 @@
 	* stdio-common/tempnam.c: Warn about insecure tempnam.
 	* misc/mktemp.c: Warn about insecure mktemp.
 
-	* sysdeps/unix/sysv/linux/check_fds.c: New file.
 	* sysdeps/generic/check_fds.c: Check that file opened is really
 	/dev/null.
+	* posix/wordexp.c (exec_comm_child): Likewise.
 
 	* elf/rtld.c (process_envvars): Open debug output file with O_NOFOLLOW.
 
 	* locale/Makefile (routines): Add nl_langinfo_l.
 	* locale/Versions [libc] (GLIBC_2.2): Add __nl_langinfo_l.
 	* locale/nl_langinfo_l.c: New file.
+	* locale/nl_langinfo.c: Allow use of file for __nl_langinfo_l
+	definition.
 
 2000-09-23  Bruno Haible  <haible@clisp.cons.org>
 

locale/nl_langinfo.c

@@ -25,9 +25,16 @@
 
 /* Return a string with the data for locale-dependent parameter ITEM.  */
 
+#ifdef USE_IN_EXTENDED_LOCALE_MODEL
+char *
+__nl_langinfo_l (item, l)
+     nl_item item;
+     __locale_t l;
+#else
 char *
 nl_langinfo (item)
      nl_item item;
+#endif
 {
   int category = _NL_ITEM_CATEGORY (item);
   unsigned int index = _NL_ITEM_INDEX (item);
@@ -37,7 +44,11 @@ nl_langinfo (item)
     /* Bogus category: bogus item.  */
     return (char *) "";
 
+#ifdef USE_IN_EXTENDED_LOCALE_MODEL
+  data = l->__locales[category];
+#else
   data = *_nl_current[category];
+#endif
 
   if (index >= data->nstrings)
     /* Bogus index for this category: bogus item.  */

misc/Makefile

@@ -1,4 +1,4 @@
-# Copyright (C) 1991,92,93,94,95,96,97,98,99 Free Software Foundation, Inc.
+# Copyright (C) 1991-1999, 2000 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
@@ -59,6 +59,8 @@ routines := brk sbrk sstk ioctl \
 	    getsysstats dirname regexp \
 	    getloadavg
 
+distribute := device-nrs.h
+
 include ../Makeconfig
 
 aux := init-misc

misc/daemon.c

@@ -34,6 +34,9 @@ static char sccsid[] = "@(#)daemon.c	8.1 (Berkeley) 6/4/93";
 #include <fcntl.h>
 #include <paths.h>
 #include <unistd.h>
+#include <sys/stat.h>
+
+#include <device-nrs.h>
 
 int
 daemon(nochdir, noclose)
@@ -57,11 +60,23 @@ daemon(nochdir, noclose)
 		(void)__chdir("/");
 
 	if (!noclose && (fd = __open(_PATH_DEVNULL, O_RDWR, 0)) != -1) {
-		(void)__dup2(fd, STDIN_FILENO);
+		struct stat64 st;
-		(void)__dup2(fd, STDOUT_FILENO);
+
-		(void)__dup2(fd, STDERR_FILENO);
+		if (__builtin_expect (__fxstat64 (_STAT_VER, fd, &st), 0) == 0
-		if (fd > 2)
+		    && __builtin_expect (S_ISCHR (st.st_mode), 1) != 0
+#if defined DEV_NULL_MAJOR && defined DEV_NULL_MINOR
+		    && st.st_rdev == makedev (DEV_NULL_MAJOR, DEV_NULL_MINOR)
+#endif
+		    ) {
+			(void)__dup2(fd, STDIN_FILENO);
+			(void)__dup2(fd, STDOUT_FILENO);
+			(void)__dup2(fd, STDERR_FILENO);
+			if (fd > 2)
+				(void)__close (fd);
+		} else {
 			(void)__close (fd);
+			return -1;
+		}
 	}
 	return (0);
 }

posix/wordexp.c

@@ -44,6 +44,9 @@
 /* #define NDEBUG 1 */
 #include <assert.h>
 
+/* Get some device information.  */
+#include <device-nrs.h>
+
 /*
  * This is a recursive-descent-style word expansion routine.
  */
@@ -840,6 +843,7 @@ exec_comm_child (char *comm, int *fildes, int showerr, int noexec)
   /* Redirect stderr to /dev/null if we have to.  */
   if (showerr == 0)
     {
+      struct stat64 st;
       int fd;
       __close (2);
       fd = __open (_PATH_DEVNULL, O_WRONLY);
@@ -848,6 +852,18 @@ exec_comm_child (char *comm, int *fildes, int showerr, int noexec)
 	  __dup2 (fd, 2);
 	  __close (fd);
 	}
+      /* Be paranoid.  Check that we actually opened the /dev/null
+         device.  */
+      if (__builtin_expect (__fxstat64 (_STAT_VER, 2, &st), 0) != 0
+	  || __builtin_expect (S_ISCHR (st.st_mode), 1) == 0
+#if defined DEV_NULL_MAJOR && defined DEV_NULL_MINOR
+	  || st.st_rdev != makedev (DEV_NULL_MAJOR, DEV_NULL_MINOR)
+#endif
+	  )
+	/* It's not the /dev/null device.  Stop right here.  The
+           problem is: how do we stop?  We use _exit() with an
+           hopefully unusual exit code.  */
+	_exit (90);
     }
 
   /* Make sure the subshell doesn't field-split on our behalf. */

sysdeps/generic/check_fds.c

@@ -31,6 +31,8 @@
 # define ABORT_INSTRUCTION
 #endif
 
+#include <device-nrs.h>
+
 
 /* Should other OSes (e.g., Hurd) have different versions which can
    be written in a better way?  */

sysdeps/generic/device-nrs.h

@@ -0,0 +1,25 @@
+/* Device numbers of devices used in the implementation.  Generic version.
+   Copyright (C) 2000 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.  */
+
+#ifndef _DEVICE_NRS_H
+#define _DEVICE_NRS_H	1
+
+/* By default we know no device numbers.  */
+
+#endif	/* device-nrs.h */

sysdeps/unix/sysv/linux/device-nrs.h

@@ -1,4 +1,5 @@
-/* Copyright (C) 2000 Free Software Foundation, Inc.
+/* Device numbers of devices used in the implementation.  Linux version.
+   Copyright (C) 2000 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
@@ -16,7 +17,11 @@
    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    Boston, MA 02111-1307, USA.  */
 
+#ifndef _DEVICE_NRS_H
+#define _DEVICE_NRS_H	1
+
+/* /dev/null is (1,3).  */
 #define DEV_NULL_MAJOR	1
 #define DEV_NULL_MINOR	3
 
-#include <sysdeps/generic/check_fds.c>
+#endif	/* device-nrs.h */