update from main archive 961109 cvs/libc-961110

Sun Nov 10 02:37:15 1996  Ulrich Drepper  <drepper@cygnus.com>

	* inet/gethstent_r.c: Update copyright.
	* nss/getXXbyYY_r.c: Likewise.
	* nss/nsswitch.c: Likewise.
	* nss/getXXent_r.c: Likewise.
	* nss/nss_files/files-XXX.c: Likewise.
	* nss/nss_files/files-netgroup.c: Likewise.
	* nss/nss_files/files-parse.c: Likewise.

	* nss/getXXent_r.c: Change implementation.  It's not necessary to
	call all setXXent functions.  Just find first available and
	when necessary let getXXent_r call the others.

	* nss/nss_files/files-XXX.c: Make really reentrant.  Now calls
	of getXXent and getXXbyYY can be mixed.  The cursor for traversing
	the database with getXXent will be remembered.

	* stdlib/test-canon.c (cwd): Change size to PATH_MAX.

Sat Nov  9 15:34:48 1996  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/unix/sysv/linux/Dist: Add sys/mtio.h.
	* sysdeps/unix/sysv/linux/sys/mtio.h: New file.

	* signal/signal.h [__USE_BSD]: Add prototype for siggetmask.

Fri Nov  8 13:29:30 1996  Ulrich Drepper  <drepper@cygnus.com>

	* ctype/ctype.h (__isascii): Don't test for seventh bit not to be
	set.  Instead for none beside the first seven bits to be set.
	X/Open allows the argument to be an `int' value.
	Reported by Alain Williams <addw@phcomp.co.uk>.
	(toascii, isascii): Define macro also when __USE_XOPEN.

	* sysdeps/posix/fpathconf.c: Use fstatfs to compute NAME_MAX, not
	PATH_MAX.

Thu Nov  7 03:04:29 1996  Ulrich Drepper  <drepper@cygnus.com>

	* nss/getXXXent_r.c (SETFUNC_NAME): Reset `nip' after loop to
	NULL so that GETFUNC will see first entry.
	(ENDFUNC_NAME): Likewise.

	Rewrite Netgroups implementation to avoid global data.
	* inet/netgroup.h: Add definition of name_list and struct
	__netgrent.
	Add prototypes for internal netgroup functions.
	* nss/nss_files/files-netgroup.c (_nss_files_setnetgrent): Take
	extra argument and use the included data instead of global vars.
	(_nss_files_endnetgrent): Likewise.
	(_nss_netgroup_parseline): Change to be static and use data
	included in the RESULT structure.
	* inet/getnetgrent_r.c (startp): Move into setup function.
	(known_groups, needed_groups): new part of the __netgrent sruct.
	(freememory): Take extra argument and use included data.
	(__internal_endnetgrent): Likewise.
	(internal_setnetgrent): Renamed to __internal_setnetgrent_reuse
	and take extra argument.
	(__internal_setnetgrent): New function.  Call
	__internal_setnetgrent_reuse after calling free_memory.
	(setnetgrent): Only call __internal_setnetgrent.
	(__getnetgrent_r): Split into two functions.  __getnetgrent_r
	calls __internal_getnetgrent after locking.
	(innetgr): Use dynamic data only.  I.e., innetgr now is fully
	reentrant.

Thu Nov  7 00:15:14 1996  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/stub/setenv.c: Correct typo: unseenv -> unsetenv.
	Reported by Joshua Cowan <jcowan@jcowan.reslife.okstate.edu>.

Wed Nov  6 13:13:37 1996  Ulrich Drepper  <drepper@cygnus.com>

	* manual/creature.texi: Document that _GNU_SOURCE is no longer the
	default when no *_SOURCE macro is given.
	Reported by Karsten Weiss <karsten@addx.au.s.shuttle.de>.
	* NOTES: remade from manual/creature.texi.
	* manual/libc.texinfo: Add back line about GPL translation which
	somehow got lost.

	* Make-dist (dist.tar): Depend on README being updated.

	* rellns-sh: Correct thinko in removing leading /.
	Reported by Andreas Jaeger <aj@arthur.pfalz.de>.

	* pwd/fgetpwent_r.c: Recognize lines containing only names starting
	with `+' or `-' in parser.
	* grp/fgetgrent_r.c: Likewise.
	* shadow/sgetspent_r.c: Likewise.
	* nss/nss_files/files-spwd.c: Don't accept entries starting with
	`+' or `-'.

	* sysdeps/stub/lchown.c: New file.

4 files changed, 108 insertions, 103 deletions

diff --git a/nss/nss_files/files-XXX.c b/nss/nss_files/files-XXX.c
index 404a9f9750..b6702b0366 100644
--- a/nss/nss_files/files-XXX.c
+++ b/nss/nss_files/files-XXX.c
@@ -1,21 +1,21 @@
 /* Common code for file-based databases in nss_files module.
-Copyright (C) 1996 Free Software Foundation, Inc.
-This file is part of the GNU C Library.
+   Copyright (C) 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 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.
+   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., 675 Mass Ave,
-Cambridge, MA 02139, USA.  */
+   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 <stdio.h>
 #include <ctype.h>
@@ -54,6 +54,8 @@ __libc_lock_define_initialized (static, lock)
 /* Maintenance of the shared stream open on the database file.  */
 
 static FILE *stream;
+static fpos_t position;
+static enum { none, getent, getby } last_use;
 static int keep_stream;
 
 /* Open database file if not already opened.  */
@@ -90,6 +92,15 @@ CONCAT(_nss_files_set,ENTNAME) (int stayopen)
 
   status = internal_setent (stayopen);
 
+  if (status == NSS_STATUS_SUCCESS && fgetpos (stream, &position) < 0)
+    {
+      fclose (stream);
+      stream = NULL;
+      status = NSS_STATUS_UNAVAIL;
+    }
+
+  last_use = getent;
+
   __libc_lock_unlock (lock);
 
   return status;
@@ -182,11 +193,25 @@ CONCAT(_nss_files_get,ENTNAME_r) (struct STRUCTURE *result,
 				  char *buffer, int buflen H_ERRNO_PROTO)
 {
   /* Return next entry in host file.  */
-  int status;
+  int status = NSS_STATUS_SUCCESS;
 
   __libc_lock_lock (lock);
 
-  status = internal_getent (result, buffer, buflen H_ERRNO_ARG);
+  /* If the last use was not by the getent function we need the
+     position the stream.  */
+  if (last_use != getent)
+    if (fsetpos (stream, &position) < 0)
+      status = NSS_STATUS_UNAVAIL;
+    else
+      last_use = getent;
+
+  if (status == NSS_STATUS_SUCCESS)
+    {
+      status = internal_getent (result, buffer, buflen H_ERRNO_ARG);
+
+      /* Remember this position.  */
+      fgetpos (stream, &position);
+    }
 
   __libc_lock_unlock (lock);
 
@@ -218,6 +243,9 @@ _nss_files_get##name##_r (proto,					      \
   /* Reset file pointer to beginning or open file.  */			      \
   internal_setent (keep_stream);					      \
 									      \
+  /* Tell getent function that we have repositioned the file pointer.  */     \
+  last_use = getby;							      \
+									      \
   while ((status = internal_getent (result, buffer, buflen H_ERRNO_ARG))      \
 	 == NSS_STATUS_SUCCESS)						      \
     { break_if_match }							      \
diff --git a/nss/nss_files/files-netgrp.c b/nss/nss_files/files-netgrp.c
index 427c6bfe8d..5f8b9398d8 100644
--- a/nss/nss_files/files-netgrp.c
+++ b/nss/nss_files/files-netgrp.c
@@ -1,26 +1,25 @@
 /* Netgroup file parser in nss_files modules.
-Copyright (C) 1996 Free Software Foundation, Inc.
-This file is part of the GNU C Library.
-Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
+   Copyright (C) 1996 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
 
-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 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.
+   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.  */
+   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 <ctype.h>
 #include <errno.h>
-#include <libc-lock.h>
 #include <netdb.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -31,39 +30,27 @@ Boston, MA 02111-1307, USA.  */
 #define DATAFILE	"/etc/netgroup"
 
 
-/* Locks the static variables in this file.  */
-__libc_lock_define_initialized (static, lock)
-
-/* We share a single place where we store the data for the current
-   netgroup.  This buffer is allocated by `setnetgrent' and freed on
-   the next call of this function or when calling `endnetgrent'.  */
-static char *data;
-static size_t data_size;
-static char *cursor;
-static int first;
-
-
 #define EXPAND(needed)							      \
   do									      \
     {									      \
-      size_t old_cursor = cursor - data;				      \
+      size_t old_cursor = result->cursor - result->data;		      \
 									      \
-      data_size += 512 > 2 * needed ? 512 : 2 * needed;			      \
-      data = realloc (data, data_size);					      \
+      result->data_size += 512 > 2 * needed ? 512 : 2 * needed;		      \
+      result->data = realloc (result->data, result->data_size);		      \
 									      \
-      if (data == NULL)							      \
+      if (result->data == NULL)						      \
 	{								      \
 	  status = NSS_STATUS_UNAVAIL;					      \
 	  goto the_end;							      \
 	}								      \
       									      \
-      cursor = data + old_cursor;					      \
+      result->cursor = result->data + old_cursor;			      \
     }									      \
   while (0)
 
 
 enum nss_status
-_nss_files_setnetgrent (const char *group)
+_nss_files_setnetgrent (const char *group, struct __netgrent *result)
 {
   FILE *fp;
   enum nss_status status;
@@ -71,8 +58,6 @@ _nss_files_setnetgrent (const char *group)
   if (group[0] == '\0')
     return NSS_STATUS_UNAVAIL;
 
-  __libc_lock_lock (lock);
-
   /* Find the netgroups file and open it.  */
   fp = fopen (DATAFILE, "r");
   if (fp == NULL)
@@ -86,7 +71,7 @@ _nss_files_setnetgrent (const char *group)
       const ssize_t group_len = strlen (group);
 
       status = NSS_STATUS_NOTFOUND;
-      cursor = data;
+      result->cursor = result->data;
 
       while (!feof (fp))
 	{
@@ -108,8 +93,9 @@ _nss_files_setnetgrent (const char *group)
 	    {
 	      /* Store the data from the first line.  */
 	      EXPAND (curlen - group_len);
-	      memcpy (cursor, &line[group_len + 1], curlen - group_len);
-	      cursor += (curlen - group_len) - 1;
+	      memcpy (result->cursor, &line[group_len + 1],
+		      curlen - group_len);
+	      result->cursor += (curlen - group_len) - 1;
 	    }
 
 	  while (line[curlen - 1] == '\n' && line[curlen - 2] == '\\')
@@ -117,7 +103,7 @@ _nss_files_setnetgrent (const char *group)
 	      /* Yes, we have a continuation line.  */
 	      if (found)
 		/* Remove these characters from the stored line.  */
-		cursor -= 2;
+		result->cursor -= 2;
 
 	      /* Get netxt line.  */
 	      curlen = getline (&line, &line_len, fp);
@@ -130,11 +116,11 @@ _nss_files_setnetgrent (const char *group)
 		  EXPAND (1 + curlen + 1);
 
 		  /* Add separator in case next line starts immediately.  */
-		  *cursor++ = ' ';
+		  *result->cursor++ = ' ';
 
 		  /* Copy new line.  */
-		  memcpy (cursor, line, curlen + 1);
-		  cursor += curlen;
+		  memcpy (result->cursor, line, curlen + 1);
+		  result->cursor += curlen;
 		}
 	    }
 
@@ -142,8 +128,8 @@ _nss_files_setnetgrent (const char *group)
 	    {
 	      /* Now we have read the line.  */
 	      status = NSS_STATUS_SUCCESS;
-	      cursor = data;
-	      first = 1;
+	      result->cursor = result->data;
+	      result->first = 1;
 	      break;
 	    }
 	}
@@ -154,33 +140,27 @@ _nss_files_setnetgrent (const char *group)
       fclose (fp);
     }
 
-  __libc_lock_unlock (lock);
-
   return status;
 }
 
 
 int
-_nss_files_endnetgrent (void)
+_nss_files_endnetgrent (struct __netgrent *result)
 {
-  __libc_lock_lock (lock);
-
   /* Free allocated memory for data if some is present.  */
-  if (data != NULL)
+  if (result->data != NULL)
     {
-      free (data);
-      data = NULL;
-      data_size = 0;
-      cursor = NULL;
+      free (result->data);
+      result->data = NULL;
+      result->data_size = 0;
+      result->cursor = NULL;
     }
 
-  __libc_lock_unlock (lock);
-
   return NSS_STATUS_SUCCESS;
 }
 
 
-enum nss_status
+static enum nss_status
 _nss_netgroup_parseline (char **cursor, struct __netgrent *result,
 			 char *buffer, int buflen)
 {
@@ -216,31 +196,31 @@ _nss_netgroup_parseline (char **cursor, struct __netgrent *result,
 	  if (! last)
 	    ++cp;
 	  *cursor = cp;
-	  first = 0;
+	  result->first = 0;
 
 	  return NSS_STATUS_SUCCESS;
 	}
 
-      return first ? NSS_STATUS_NOTFOUND : NSS_STATUS_RETURN;
+      return result->first ? NSS_STATUS_NOTFOUND : NSS_STATUS_RETURN;
     }
 
   /* Match host name.  */
   host = ++cp;
   while (*cp != ',')
     if (*cp++ == '\0')
-      return first ? NSS_STATUS_NOTFOUND : NSS_STATUS_RETURN;
+      return result->first ? NSS_STATUS_NOTFOUND : NSS_STATUS_RETURN;
 
   /* Match user name.  */
   user = ++cp;
   while (*cp != ',')
     if (*cp++ == '\0')
-      return first ? NSS_STATUS_NOTFOUND : NSS_STATUS_RETURN;
+      return result->first ? NSS_STATUS_NOTFOUND : NSS_STATUS_RETURN;
 
   /* Match domain name.  */
   domain = ++cp;
   while (*cp != ')')
     if (*cp++ == '\0')
-      return first ? NSS_STATUS_NOTFOUND : NSS_STATUS_RETURN;
+      return result->first ? NSS_STATUS_NOTFOUND : NSS_STATUS_RETURN;
   ++cp;
 
 
@@ -271,7 +251,7 @@ _nss_netgroup_parseline (char **cursor, struct __netgrent *result,
       /* Rememember where we stopped reading.  */
       *cursor = cp;
 
-      first = 0;
+      result->first = 0;
     }
 
   return status;
@@ -283,11 +263,7 @@ _nss_files_getnetgrent_r (struct __netgrent *result, char *buffer, int buflen)
 {
   enum nss_status status;
 
-  __libc_lock_lock (lock);
-
-  status = _nss_netgroup_parseline (&cursor, result, buffer, buflen);
-
-  __libc_lock_unlock (lock);
+  status = _nss_netgroup_parseline (&result->cursor, result, buffer, buflen);
 
   return status;
 }
diff --git a/nss/nss_files/files-parse.c b/nss/nss_files/files-parse.c
index 6bebfa287c..1250bb9572 100644
--- a/nss/nss_files/files-parse.c
+++ b/nss/nss_files/files-parse.c
@@ -1,21 +1,21 @@
 /* Common code for file-based database parsers in nss_files module.
-Copyright (C) 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., 675 Mass Ave,
-Cambridge, MA 02139, USA.  */
+   Copyright (C) 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 <ctype.h>
 #include <errno.h>
diff --git a/nss/nss_files/files-spwd.c b/nss/nss_files/files-spwd.c
index df0106bdd6..27cc5882a4 100644
--- a/nss/nss_files/files-spwd.c
+++ b/nss/nss_files/files-spwd.c
@@ -32,6 +32,7 @@ struct spent_data {};
 
 DB_LOOKUP (spnam, 1 + strlen (name), (".%s", name),
 	   {
-	     if (! strcmp (name, result->sp_namp))
+	     if (name[0] != '+' && name[0] != '-'
+		 && ! strcmp (name, result->sp_namp))
 	       break;
 	   }, const char *name)