update from main archive 961207 cvs/libc-961208

Sun Dec  8 06:56:49 1996  Ulrich Drepper  <drepper@cygnus.com>

	* io/getwd.c: Use PATH_MAX not LOCAL_PATH_MAX.  Fix typo in
	comment.
	* stdlib/canonicalize.c: Correct bugs in last change.
	Patch by HJ Lu.

	* libio/Makefile (routines): Remove ioprims.
	(aux): Remove cleanup.
	Add IO_DEBUG option for .o files.
	* libio/cleanups.c: Removed.
	* libio/ioprims.c: Removed.
	* libio/filedoalloc.c: More updates from libg++-2.8b5.
	* libio/fileops.c: Likewise.
	* libio/genops.c: Likewise.
	* libio/iolibio.h: Likewise.
	* libio/iopopen.c: Likewise.
	* libio/iovsprintf.c: Likewise.
	* libio/iovsscanf.c: Likewise.
	* libio/libio.h: Likewise.
	* libio/libioP.h: Likewise.
	* libio/memstream.c: Likewise.
	* libio/strfile.h: Likewise.
	* libio/vasprintf.c: Likewise.
	* libio/vsnprintf.c: Likewise.

	* libio/stdio.h: Define P_tmpdir only is __USE_SVID.

	* manual/arith.texi: Change references to ANSI C to ISO C.
	* manual/conf.texi: Likewise.
	* manual/creature.texi: Likewise.
	* manual/ctype.texi: Likewise.
	* manual/errno.texi: Likewise.
	* manual/filesys.texi: Likewise.
	* manual/intro.texi. Likewise.
	* manual/io.texi: Likewise.
	* manual/lang.texi: Likewise.
	* manual/libc.texinfo: Likewise.
	* manual/locale.texi: Likewise.
	* manual/maint.texi: Likewise.
	* manual/mbyte.texi: Likewise.
	* manual/memory.texi: Likewise.
	* manual/process.texi: Likewise.
	* manual/process.texi: Likewise.
	* manual/search.texi: Likewise.
	* manual/setjmp.texi: Likewise.
	* manual/signal.texi: Likewise.
	* manual/startup.texi: Likewise.
	* manual/stdio.texi: Likewise.
	* manual/string.texi: Likewise.
	* manual/time.texi: Likewise.

	* manual/locale.texi: Remove description of LC_RESPONSE and add
	LC_MESSAGES.

	* Makefile (subdirs): Change malloc in $(malloc).
	* config.make.in: Add variable malloc which is initialized from
	@malloc@.
	* configure.in: Add new option --enable-new-malloc to use new
	malloc.  This is the default on Linux.
	* sysdeps/unix/sysv/linux/configure.in: Define malloc to new-malloc
	by default.
	* new-malloc/Makefile: New file.  Improved malloc implementation.
	* new-malloc/malloc.c: Likewise.
	* new-malloc/malloc.h: Likewise.
	* new-malloc/mallocbug.c: Likewise.
	* new-malloc/obstack.c: Likewise.
	* new-malloc/obstack.h: Likewise.
	* new-malloc/thread-m.h: Likewise.
	* time/Makefile: Compile ap.c with NO_MCHECK flag for now.
	* time/ap.c: Don't call mcheck if NO_MCHECK is defined.

	* resolv/Makefile: Add rule to rebuiild libresolv.so when libc.so
	changed.

	* stdio/feof.c: Update copyright.
	* stdio/stdio.h: Add field for lock to FILE structure.
	Add cast to *MAGIC constants to prevent warnings.

	* stdio-common/bug7.c: Correct test.  Stream must not be closed
	twice.

	* stdlib/Makefile (routines): Add secure-getenv.
	* stdlib/secure-getenv.c: New file.  __secure_getenv function
	moved to here from sysdeps/generic/getenv.c.  Otherwise an
	application cannot replace the getenv function in the libc.
	* sysdeps/generic/getenv.c: Remove __secure_getenv function.
	* sysdeps/stub/getenv.c: Remove __secure_getenv alias.

	* sysdeps/mach/libc-lock.h: Define__libc_mutex_lock to __mutex_lock.

	* sysdeps/posix/fdopen.c: Update copyright.  Don't use EXFUN.

	* time/test-tz.c: Comment fifth test out.  PROBLEM.

	* time/tzset.c: De-ANSI-declfy.
	(__tzset): Don't increment pointer tz when no DST information is
	given.

Sat Dec  7 23:47:54 1996  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/mach/libc-lock.h [_LIBC]: Add definition of
	__libc_mutex_lock.
	Patch by Thomas Bushnell.

	* sysdeps/unix/sysv/linux/timebits.h: Load <asm/param.h> only
	if __USE_MISC.

	* sysdeps/unix/sysv/linux/Dist: Add llseek.c.

Sat Dec  7 12:18:56 1996  Ulrich Drepper  <drepper@cygnus.com>

	* time/strftime (%c format): Remove %Z from default string.
	Reported by Paul Eggert

	* io/getwd.c: Don't apply getcwd on user supplied buffer.

3 files changed, 42 insertions, 16 deletions

diff --git a/stdlib/Makefile b/stdlib/Makefile
index 9d5744fc78..eadcd40cee 100644
--- a/stdlib/Makefile
+++ b/stdlib/Makefile
@@ -12,9 +12,9 @@
 # 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., 675 Mass Ave,
-# Cambridge, MA 02139, USA.
+# 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.
 
 #
 #	Makefile for stdlib routines
@@ -27,7 +27,7 @@ routines	:=							      \
 	atof atoi atol							      \
 	abort								      \
 	bsearch qsort msort						      \
-	getenv putenv setenv						      \
+	getenv putenv setenv secure-getenv				      \
 	exit on_exit atexit						      \
 	abs labs llabs							      \
 	div ldiv lldiv							      \
diff --git a/stdlib/canonicalize.c b/stdlib/canonicalize.c
index 8c0074a11c..0985e250b8 100644
--- a/stdlib/canonicalize.c
+++ b/stdlib/canonicalize.c
@@ -53,21 +53,14 @@ canonicalize (const char *name, char *resolved)
     path_max = 1024;
 #endif
 
-  rpath = resolved;
+  rpath = resolved ? __alloca (path_max) : malloc (path_max);
   rpath_limit = rpath + path_max;
-  if (!resolved)
-    rpath = malloc (path_max);
 
   if (name[0] != '/')
     {
-      /* We don't write to RPATH directly since the application and
-	 the library might disagree about the value for PATH_MAX.  */
-      char tmpbuf[path_max];
-
       if (!getcwd (rpath, path_max))
 	goto error;
-
-      dest = __stpcpy (rpath, tmpbuf);
+      dest = strchr (rpath, '\0');
     }
   else
     {
@@ -128,7 +121,7 @@ canonicalize (const char *name, char *resolved)
 
 	  if (S_ISLNK (st.st_mode))
 	    {
-	      char * buf = __alloca(path_max);
+	      char *buf = __alloca (path_max);
 
 	      if (++num_links > MAXSYMLINKS)
 		{
@@ -169,10 +162,13 @@ canonicalize (const char *name, char *resolved)
   if (dest > rpath + 1 && dest[-1] == '/')
     --dest;
   *dest = '\0';
-  return rpath;
+
+  return resolved ? strcpy (resolved, rpath) : rpath;
 
 error:
-  if (!resolved)
+  if (resolved)
+    strcpy (resolved, rpath);
+  else
     free (rpath);
   return NULL;
 }
diff --git a/stdlib/secure-getenv.c b/stdlib/secure-getenv.c
new file mode 100644
index 0000000000..f4dc43cc85
--- /dev/null
+++ b/stdlib/secure-getenv.c
@@ -0,0 +1,30 @@
+/* Copyright (C) 1991, 1992, 1994, 1996 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 <stdlib.h>
+#include <unistd.h>
+
+/* Some programs and especially the libc itself have to be careful
+   what values to accept from the environment.  This special version
+   checks for SUID or SGID first before doing any work.  */
+char *
+__secure_getenv (name)
+     const char *name;
+{
+  return __libc_enable_secure ? NULL : getenv (name);
+}