update from main archive 961109cvs/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.

26 files changed, 622 insertions, 328 deletions

diff --git a/ChangeLog b/ChangeLog
index 1d4d396..d8b11bc 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,96 @@
+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 `-'.
+
 Wed Nov  6 04:30:26 1996  Ulrich Drepper  <drepper@cygnus.com>
 
 	* sysdeps/unix/sysv/linux/syscalls.list: Add weak alias llseek for
@@ -19,6 +112,7 @@ Tue Nov  5 23:38:28 1996  Ulrich Drepper  <drepper@cygnus.com>
 	if __USE_XOPEN_EXTENDED is defined.
 
 	* io/Makefile (routines): Add lchown.
+	* sysdeps/stub/lchown.c: New file.
 
 	* io/sys/poll.h: Add definition of POLLWRNORM.
 
diff --git a/Make-dist b/Make-dist
index cc8fdac..f5ec288 100644
--- a/Make-dist
+++ b/Make-dist
@@ -191,7 +191,7 @@ configure: configure.in aclocal.m4; $(autoconf-it)
 dist: $(tardir).tar.gz
 
 subdir_dist: dist.tar
-dist.tar: $(tardir) $(+tsrcs)
+dist.tar: README $(tardir) $(+tsrcs)
 	tar chvf $@ $(addprefix $(tardir)/,$(filter-out $(tardir),$^))
 
 $(tardir).tar: dist.tar subdir_dist
diff --git a/NOTES b/NOTES
index 2af653c..4477110 100644
--- a/NOTES
+++ b/NOTES
@@ -53,12 +53,26 @@ self-contained way.
 
  - Macro: _SVID_SOURCE
      If you define this macro, functionality derived from SVID is
-     included as well as the ANSI C, POSIX.1, and POSIX.2 material.
+     included as well as the ANSI C, POSIX.1, POSIX.2, and X/Open
+     material.
+
+ - Macro: _XOPEN_SOURCE
+     If you define these macro, functionality described in the X/Open
+     Portability Guide is included.  This is an superset of the POSIX.1
+     and POSIX.2 functionality and in fact `_POSIX_SOURCE' and
+     `_POSIX_C_SOURCE' get automatically be defined.
+
+     But as the great unifaction of all Unices there is also
+     functionality only available in BSD and SVID is included.
+
+     If the macro `_XOPEN_SOURCE_EXTENDED' is also defined, even more
+     functionality is available.  The extra functions will make all
+     functions available which are necessary for the X/Open Unix brand.
 
  - Macro: _GNU_SOURCE
      If you define this macro, everything is included: ANSI C, POSIX.1,
-     POSIX.2, BSD, SVID, and GNU extensions.  In the cases where POSIX.1
-     conflicts with BSD, the POSIX definitions take precedence.
+     POSIX.2, BSD, SVID, X/Open, and GNU extensions.  In the cases where
+     POSIX.1 conflicts with BSD, the POSIX definitions take precedence.
 
      If you want to get the full effect of `_GNU_SOURCE' but make the
      BSD definitions take precedence over the POSIX definitions, use
@@ -73,9 +87,23 @@ self-contained way.
      compiler or linker.  *Note:* If you forget to do this, you may get
      very strange errors at run time.
 
+ - Macro: _REENTRANT,_THREAD_SAFE
+     If you define one this macro, reentrant versions of several
+     functions get declared.  Some of the functions are specified in
+     POSIX.1c but many others are only available on a few other systems
+     or are unique to GNU libc.  The problem is that the
+     standardization of the thread safe C library interface still is
+     behind.
+
+     Unlike on some other systems no special version of the C library
+     must be used for linking.  There is only one version but while
+     compiling this it must have been specified to compile as thread
+     safe.
+
    We recommend you use `_GNU_SOURCE' in new programs.  If you don't
 specify the `-ansi' option to GCC and don't define any of these macros
-explicitly, the effect is the same as defining `_GNU_SOURCE'.
+explicitly, the effect is the same as defining `_POSIX_C_SOURCE' to 2
+and `_POSIX_SOURCE', `_SVID_SOURCE', and `_BSD_SOURCE' to 1.
 
    When you define a feature test macro to request a larger class of
 features, it is harmless to define in addition a feature test macro for
diff --git a/ctype/ctype.h b/ctype/ctype.h
index f4048b3..64ca26e 100644
--- a/ctype/ctype.h
+++ b/ctype/ctype.h
@@ -78,8 +78,8 @@ extern __const int *__ctype_toupper; /* Case conversions.  */
 #define	__isctype(c, type) \
   (__ctype_b[(int) (c)] & (unsigned short int) type)
 
-#define	__isascii(c)	(((c) & (1 << 7)) == 0)	/* If high bit is set.  */
-#define	__toascii(c)	((c) & 0x7f) /* Mask off high bit.  */
+#define	__isascii(c)	(((c) & ~0x7f) == 0)	/* If C is a 7 bit value.  */
+#define	__toascii(c)	((c) & 0x7f)		/* Mask off high bits.  */
 
 #define	__tolower(c)	((int) __ctype_tolower[(int) (c)])
 #define	__toupper(c)	((int) __ctype_toupper[(int) (c)])
@@ -126,7 +126,7 @@ extern int toascii __P ((int __c));
 
 #endif /* Use SVID or use misc.  */
 
-#if defined(__USE_SVID) || defined(__USE_XOPEN)
+#if defined(__USE_SVID) || defined(__USE_MISC) || defined(__USE_XOPEN)
 /* These are the same as `toupper' and `tolower'.  */
 __exctype (_toupper);
 __exctype (_tolower);
@@ -152,7 +152,7 @@ __exctype (_tolower);
 #define	tolower(c)	__tolower(c)
 #define	toupper(c)	__toupper(c)
 
-#if defined(__USE_SVID) || defined(__USE_MISC)
+#if defined(__USE_SVID) || defined(__USE_MISC) || defined(__USE_XOPEN)
 #define	isascii(c)	__isascii(c)
 #define	toascii(c)	__toascii(c)
 #endif
diff --git a/grp/fgetgrent_r.c b/grp/fgetgrent_r.c
index e9a2c25..dd74cfc 100644
--- a/grp/fgetgrent_r.c
+++ b/grp/fgetgrent_r.c
@@ -1,20 +1,20 @@
 /* Copyright (C) 1991, 1996 Free Software Foundation, Inc.
-This file is part of the GNU C Library.
+   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 <ctype.h>
 #include <grp.h>
@@ -33,11 +33,20 @@ struct grent_data {};
 LINE_PARSER
 (,
  STRING_FIELD (result->gr_name, ISCOLON, 0);
- STRING_FIELD (result->gr_passwd, ISCOLON, 0);
- if (result->gr_name[0] == '+' || result->gr_name[0] == '-')
-   INT_FIELD_MAYBE_NULL (result->gr_gid, ISCOLON, 0, 10, , 0)
+ if (line[0] == '\0'
+     && (result->gr_name[0] == '+' || result->gr_name[0] == '-'))
+   {
+     result->gr_passwd = NULL;
+     result->gr_gid = 0;
+   }
  else
-   INT_FIELD (result->gr_gid, ISCOLON, 0, 10,)
+   {
+     STRING_FIELD (result->gr_passwd, ISCOLON, 0);
+     if (result->gr_name[0] == '+' || result->gr_name[0] == '-')
+       INT_FIELD_MAYBE_NULL (result->gr_gid, ISCOLON, 0, 10, , 0)
+     else
+       INT_FIELD (result->gr_gid, ISCOLON, 0, 10,)
+   }
  )
 
 
diff --git a/inet/gethstent_r.c b/inet/gethstent_r.c
index f07601d..2c9f151 100644
--- a/inet/gethstent_r.c
+++ b/inet/gethstent_r.c
@@ -1,20 +1,20 @@
 /* Copyright (C) 1996 Free Software Foundation, Inc.
-This file is part of the GNU C Library.
+   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., 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 <netdb.h>
 
diff --git a/inet/getnetgrent_r.c b/inet/getnetgrent_r.c
index 7288dbe..1848ad7 100644
--- a/inet/getnetgrent_r.c
+++ b/inet/getnetgrent_r.c
@@ -18,6 +18,7 @@ Boston, MA 02111-1307, USA.  */
 
 #include <libc-lock.h>
 #include <netdb.h>
+#include <string.h>
 #include "netgroup.h"
 #include "nsswitch.h"
 
@@ -28,18 +29,10 @@ __libc_lock_define_initialized (static, lock)
 /* This handle for the NSS data base is shared between all
    set/get/endXXXent functions.  */
 static service_user *nip;
-/* Remember the first service_entry, it's always the same.  */
-static service_user *startp;
 
-/* A netgroup can consist of names of other netgroups.  We have to
-   track which netgroups were read and which still have to be read.  */
-struct name_list
-{
-  const char *name;
-  struct name_list *next;
-};
-struct name_list *known_groups;
-struct name_list *needed_groups;
+/* The whole information for the set/get/endnetgrent functions are
+   kept in this structure.  */
+static struct __netgrent dataset;
 
 
 /* The lookup function for the first entry of this service.  */
@@ -52,7 +45,10 @@ extern int __nss_netgroup_lookup (service_user **nip, const char *name,
 static enum nss_status
 setup (void **fctp, const char *func_name, int all)
 {
+  /* Remember the first service_entry, it's always the same.  */
+  static service_user *startp = NULL;
   int no_more;
+
   if (startp == NULL)
     {
       no_more = __nss_netgroup_lookup (&nip, func_name, fctp);
@@ -74,29 +70,29 @@ setup (void **fctp, const char *func_name, int all)
 
 /* Free used memory.  */
 static void
-free_memory (void)
+free_memory (struct __netgrent *data)
 {
-  while (known_groups != NULL)
+  while (data->known_groups != NULL)
     {
-      struct name_list *tmp = known_groups;
-      known_groups = known_groups->next;
+      struct name_list *tmp = data->known_groups;
+      data->known_groups = data->known_groups->next;
       free (tmp->name);
       free (tmp);
     }
 
-  while (needed_groups != NULL)
+  while (data->needed_groups != NULL)
     {
-      struct name_list *tmp = needed_groups;
-      needed_groups = needed_groups->next;
+      struct name_list *tmp = data->needed_groups;
+      data->needed_groups = data->needed_groups->next;
       free (tmp->name);
       free (tmp);
     }
 }
 
 static int
-internal_setnetgrent (const char *group)
+__internal_setnetgrent_reuse (const char *group, struct __netgrent *datap)
 {
-  enum nss_status (*fct) (const char *);
+  enum nss_status (*fct) (const char *, struct __netgrent *);
   enum nss_status status = NSS_STATUS_UNAVAIL;
   struct name_list *new_elem;
   int no_more;
@@ -106,7 +102,7 @@ internal_setnetgrent (const char *group)
   while (! no_more)
     {
       /* Ignore status, we force check in `__nss_next'.  */
-      status = (*fct) (group);
+      status = (*fct) (group, datap);
 
       no_more = __nss_next (&nip, "setnetgrent", (void **) &fct, status, 0);
     }
@@ -121,24 +117,30 @@ internal_setnetgrent (const char *group)
     }
   else
     {
-      new_elem->next = known_groups;
-      known_groups = new_elem;
+      new_elem->next = datap->known_groups;
+      datap->known_groups = new_elem;
     }
 
   return status == NSS_STATUS_SUCCESS;
 }
 
 int
+__internal_setnetgrent (const char *group, struct __netgrent *datap)
+{
+  /* Free list of all netgroup names from last run.  */
+  free_memory (datap);
+
+  return __internal_setnetgrent_reuse (group, datap);
+}
+
+int
 setnetgrent (const char *group)
 {
   int result;
 
   __libc_lock_lock (lock);
 
-  /* Free list of all netgroup names from last run.  */
-  free_memory ();
-
-  result = internal_setnetgrent (group);
+  result = __internal_setnetgrent (group, &dataset);
 
   __libc_lock_unlock (lock);
 
@@ -147,14 +149,12 @@ setnetgrent (const char *group)
 
 
 void
-endnetgrent (void)
+__internal_endnetgrent (struct __netgrent *datap)
 {
   service_user *old_nip;
-  enum nss_status (*fct) (void);
+  enum nss_status (*fct) (struct __netgrent *);
   int no_more;
 
-  __libc_lock_lock (lock);
-
   /* Remember which was the last used service.  */
   old_nip = nip;
 
@@ -163,66 +163,75 @@ endnetgrent (void)
   while (! no_more)
     {
       /* Ignore status, we force check in `__nss_next'.  */
-      (void) (*fct) ();
+      (void) (*fct) (datap);
 
       no_more = (nip == old_nip
 		 || __nss_next (&nip, "endnetgrent", (void **) &fct, 0, 1));
     }
 
   /* Now free list of all netgroup names from last run.  */
-  free_memory ();
+  free_memory (datap);
+}
+
+
+void
+endnetgrent (void)
+{
+  __libc_lock_lock (lock);
+
+  __internal_endnetgrent (&dataset);
 
   __libc_lock_unlock (lock);
 }
 
 
 int
-__getnetgrent_r (char **hostp, char **userp, char **domainp,
-		 char *buffer, size_t buflen)
+__internal_getnetgrent (char **hostp, char **userp, char **domainp,
+			struct __netgrent *datap,
+			char *buffer, size_t buflen)
 {
   enum nss_status (*fct) (struct __netgrent *, char *, int);
-  struct __netgrent result;
   int no_more;
 
   /* Initialize status to return if no more functions are found.  */
   enum nss_status status = NSS_STATUS_NOTFOUND;
 
-  __libc_lock_lock (lock);
-
   /* Run through available functions, starting with the same function last
      run.  We will repeat each function as long as it succeeds, and then go
      on to the next service action.  */
   no_more = setup ((void **) &fct, "getnetgrent_r", 0);
   while (! no_more)
     {
-      status = (*fct) (&result, buffer, buflen);
+      status = (*fct) (datap, buffer, buflen);
 
       if (status == NSS_STATUS_RETURN)
 	{
 	  /* This was the last one for this group.  Look at next group
 	     if available.  */
 	  int found = 0;
-	  while (needed_groups != NULL && ! found)
+	  while (datap->needed_groups != NULL && ! found)
 	    {
-	      struct name_list *tmp = needed_groups;
-	      needed_groups = needed_groups->next;
-	      tmp->next = known_groups;
-	      known_groups = tmp;
+	      struct name_list *tmp = datap->needed_groups;
+	      datap->needed_groups = datap->needed_groups->next;
+	      tmp->next = datap->known_groups;
+	      datap->known_groups = tmp;
 
-	      found = internal_setnetgrent (known_groups->name);
+	      found = __internal_setnetgrent_reuse (datap->known_groups->name,
+						    datap);
 	    }
 
 	  if (found)
 	    continue;
 	}
-      else if (status == NSS_STATUS_SUCCESS && result.type == group_val)
+      else if (status == NSS_STATUS_SUCCESS && datap->type == group_val)
 	{
 	  /* The last entry was a name of another netgroup.  */
 	  struct name_list *namep;
 
 	  /* Ignore if we've seen the name before.  */
-	  for (namep = known_groups; namep != NULL; namep = namep->next)
-	    if (strcmp (result.val.group, namep->name) == 0)
+	  for (namep = datap->known_groups; namep != NULL;
+	       namep = namep->next)
+	    if (strcmp (datap->val.group, namep->name) == 0)
 	      break;
 	  if (namep != NULL)
 	    /* Really ignore.  */
@@ -230,7 +239,7 @@ __getnetgrent_r (char **hostp, char **userp, char **domainp,
 
 	  namep = (struct name_list *) malloc (sizeof (struct name_list));
 	  if (namep == NULL
-	      || (namep->name = __strdup (result.val.group)) == NULL)
+	      || (namep->name = __strdup (datap->val.group)) == NULL)
 	    {
 	      /* We are out of memory.  */
 	      if (namep != NULL)
@@ -239,8 +248,8 @@ __getnetgrent_r (char **hostp, char **userp, char **domainp,
 	    }
 	  else
 	    {
-	      namep->next = needed_groups;
-	      needed_groups = namep;
+	      namep->next = datap->needed_groups;
+	      datap->needed_groups = namep;
 	      /* And get the next entry.  */
 	      continue;
 	    }
@@ -251,14 +260,29 @@ __getnetgrent_r (char **hostp, char **userp, char **domainp,
 
   if (status == NSS_STATUS_SUCCESS)
     {
-      *hostp = result.val.triple.host;
-      *userp = result.val.triple.user;
-      *domainp = result.val.triple.domain;
+      *hostp = datap->val.triple.host;
+      *userp = datap->val.triple.user;
+      *domainp = datap->val.triple.domain;
     }
 
+  return status == NSS_STATUS_SUCCESS ? 1 : 0;
+}
+
+/* The real entry point.  */
+int
+__getnetgrent_r (char **hostp, char **userp, char **domainp,
+		 char *buffer, size_t buflen)
+{
+  enum nss_status status;
+
+  __libc_lock_lock (lock);
+
+  status = __internal_getnetgrent (hostp, userp, domainp, &dataset,
+				   buffer, buflen);
+
   __libc_lock_unlock (lock);
 
-  return status == NSS_STATUS_SUCCESS ? 1 : 0;
+  return status;
 }
 weak_alias (__getnetgrent_r, getnetgrent_r)
 
@@ -267,18 +291,16 @@ int
 innetgr (const char *netgroup, const char *host, const char *user,
 	 const char *domain)
 {
-  int (*setfct) (const char *);
-  void (*endfct) (void);
+  int (*setfct) (const char *, struct __netgrent *);
+  void (*endfct) (struct __netgrent *);
   int (*getfct) (struct __netgrent *, char *, int);
+  struct name_list *known;
+  struct name_list *needed;
   int result = 0;
   int no_more;
-  struct name_list *known = NULL;
-  struct name_list *needed = NULL;
   const char *current_group = netgroup;
   int real_entry = 0;
 
-  __libc_lock_lock (lock);
-
   /* Walk through the services until we found an answer or we shall
      not work further.  We can do some optimization here.  Since all
      services must provide the `setnetgrent' function we can do all
@@ -289,14 +311,17 @@ innetgr (const char *netgroup, const char *host, const char *user,
       while (! no_more)
 	{
 	  enum nss_status status;
+	  struct __netgrent entry;
+
+	  /* Clear the space for the netgroup data.  */
+	  bzero (&entry, sizeof (entry));
 
 	  /* Open netgroup.  */
-	  status = (*setfct) (current_group);
+	  status = (*setfct) (current_group, &entry);
 	  if (status == NSS_STATUS_SUCCESS
 	      && __nss_lookup (&nip, "getnetgrent_r", (void **) &getfct) == 0)
 	    {
 	      char buffer[1024];
-	      struct __netgrent entry;
 
 	      while ((*getfct) (&entry, buffer, sizeof buffer)
 		     == NSS_STATUS_SUCCESS)
@@ -356,7 +381,7 @@ innetgr (const char *netgroup, const char *host, const char *user,
 
 	  /* Free all resources of the service.  */
 	  if (__nss_lookup (&nip, "endnetgrent", (void **) &endfct) == 0)
-	    (*endfct) ();
+	    (*endfct) (&entry);
 
 	  /* Look for the next service.  */
 	  no_more = __nss_next (&nip, "setnetgrent",
@@ -377,8 +402,6 @@ innetgr (const char *netgroup, const char *host, const char *user,
       break;
     }
 
-  __libc_lock_unlock (lock);
-
   /* Free the memory.  */
   while (known != NULL)
     {
diff --git a/inet/netgroup.h b/inet/netgroup.h
index 746cd9e..d773d8a 100644
--- a/inet/netgroup.h
+++ b/inet/netgroup.h
@@ -20,6 +20,16 @@ Boston, MA 02111-1307, USA.  */
 #ifndef _NETGROUP_H
 #define _NETGROUP_H	1
 
+/* A netgroup can consist of names of other netgroups.  We have to
+   track which netgroups were read and which still have to be read.  */
+struct name_list
+{
+  const char *name;
+  struct name_list *next;
+};
+
+
+/* Dataset for iterating netgroups.  */
 struct __netgrent
 {
   enum { triple_val, group_val } type;
@@ -36,6 +46,25 @@ struct __netgrent
 
     const char *group;
   } val;
+
+  /* Room for the data kept between the calls to the netgroup
+     functions.  We must avoid global variables.  */
+  char *data;
+  size_t data_size;
+  char *cursor;
+  int first;
+
+  struct name_list *known_groups;
+  struct name_list *needed_groups;
 };
 
+
+/* The internal netgroup handling functions might be called from outside.  */
+extern int __internal_setnetgrent (const char *group,
+				   struct __netgrent *datap);
+extern void __internal_endnetgrent (struct __netgrent *datap);
+extern int __internal_getnetgrent_r (char **hostp, char **userp,
+				     char **domainp, struct __netgrent *datap,
+				     char *buffer, size_t buflen);
+
 #endif /* netgroup.h */
diff --git a/manual/creature.texi b/manual/creature.texi
index 37dee54..babbb0a 100644
--- a/manual/creature.texi
+++ b/manual/creature.texi
@@ -124,8 +124,10 @@ it must have been specified to compile as thread safe.
 @end defvr
 
 We recommend you use @code{_GNU_SOURCE} in new programs.  If you don't
-specify the @samp{-ansi} option to GCC and don't define any of these macros
-explicitly, the effect is the same as defining @code{_GNU_SOURCE}.
+specify the @samp{-ansi} option to GCC and don't define any of these
+macros explicitly, the effect is the same as defining
+@code{_POSIX_C_SOURCE} to 2 and @code{_POSIX_SOURCE},
+@code{_SVID_SOURCE}, and @code{_BSD_SOURCE} to 1.
 
 When you define a feature test macro to request a larger class of features,
 it is harmless to define in addition a feature test macro for a subset of
diff --git a/manual/libc.texinfo b/manual/libc.texinfo
index 80eb496..d6024ed 100644
--- a/manual/libc.texinfo
+++ b/manual/libc.texinfo
@@ -43,6 +43,8 @@ derived work is distributed under the terms of a permission notice
 identical to this one.
 
 Permission is granted to copy and distribute translations of this manual
+into another language, under the above conditions for modified versions,
+except that the text of the translation of the section entitled ``GNU
 Library General Public License'' must be approved for accuracy by the
 Foundation.
 @end ifinfo
diff --git a/nss/getXXbyYY_r.c b/nss/getXXbyYY_r.c
index d85169a..1295772 100644
--- a/nss/getXXbyYY_r.c
+++ b/nss/getXXbyYY_r.c
@@ -1,21 +1,21 @@
 /* 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 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.  */
+   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 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 "nsswitch.h"
 
diff --git a/nss/getXXent_r.c b/nss/getXXent_r.c
index 1d06a94..52e2136 100644
--- a/nss/getXXent_r.c
+++ b/nss/getXXent_r.c
@@ -1,21 +1,21 @@
 /* Copyright (C) 1996 Free Software Foundation, Inc.
-This file is part of the GNU C Library.
-Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
+   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 <libc-lock.h>
 
@@ -48,17 +48,17 @@ Boston, MA 02111-1307, USA.  */
 
 /* To make the real sources a bit prettier.  */
 #define REENTRANT_GETNAME APPEND_R (GETFUNC_NAME)
-#define APPEND_R(name) APPEND_R1 (name)
-#define APPEND_R1(name) name##_r
-#define INTERNAL(name) INTERNAL1 (name)
-#define INTERNAL1(name) __##name
+#define APPEND_R(Name) CONCAT2_2 (Name, _r)
+#define INTERNAL(Name) CONCAT2_2 (__, Name)
+#define CONCAT2_1(Pre, Post) CONCAT2_2 (Pre, Post)
+#define CONCAT2_2(Pre, Post) Pre##Post
 
 #define SETFUNC_NAME_STRING STRINGIZE (SETFUNC_NAME)
 #define GETFUNC_NAME_STRING STRINGIZE (REENTRANT_GETNAME)
 #define ENDFUNC_NAME_STRING STRINGIZE (ENDFUNC_NAME)
 #define DATABASE_NAME_STRING STRINGIZE (DATABASE_NAME)
-#define STRINGIZE(name) STRINGIZE1 (name)
-#define STRINGIZE1(name) #name
+#define STRINGIZE(Name) STRINGIZE1 (Name)
+#define STRINGIZE1(Name) #Name
 
 #define DB_LOOKUP_FCT CONCAT3_1 (__nss_, DATABASE_NAME, _lookup)
 #define CONCAT3_1(Pre, Name, Post) CONCAT3_2 (Pre, Name, Post)
@@ -74,9 +74,13 @@ Boston, MA 02111-1307, USA.  */
 #endif
 
 /* Some databases take the `stayopen' flag.  */
-#ifndef STAYOPEN
-#define STAYOPEN void
-#define STAYOPEN_VAR
+#ifdef STAYOPEN
+# define STAYOPEN_TMP CONCAT2_1 (STAYOPEN, _tmp)
+# define STAYOPEN_TMPVAR CONCAT2_1 (STAYOPEN_VAR, _tmp)
+#else
+# define STAYOPEN void
+# define STAYOPEN_VAR
+# define STAYOPEN_TMPVAR
 #endif
 
 /* Prototype for the setXXXent functions we use here.  */
@@ -95,6 +99,13 @@ static service_user *nip;
 /* Remember the first service_entry, it's always the same.  */
 static service_user *startp;
 
+#ifdef STAYOPEN_TMP
+/* We need to remember the last `stayopen' flag given by the user
+   since the `setent' function is only called for the first available
+   service.  */
+static STAYOPEN_TMP;
+#endif
+
 /* Protect above variable against multiple uses at the same time.  */
 __libc_lock_define_initialized (static, lock)
 
@@ -143,15 +154,21 @@ SETFUNC_NAME (STAYOPEN)
 
   __libc_lock_lock (lock);
 
-  /* Cycle through all the services and run their setXXent functions.  */
+  /* Cycle through the services and run their `setXXent' functions until
+     we find an available service.  */
   no_more = setup ((void **) &fct, SETFUNC_NAME_STRING, 1);
   while (! no_more)
     {
-      /* Ignore status, we force check in __NSS_NEXT.  */
-      (void) (*fct) (STAYOPEN_VAR);
+      enum nss_status status = (*fct) (STAYOPEN_VAR);
 
-      no_more = __nss_next (&nip, SETFUNC_NAME_STRING, (void **) &fct, 0, 1);
+      no_more = __nss_next (&nip, SETFUNC_NAME_STRING, (void **) &fct,
+			    status, 1);
     }
+  nip = NULL;
+
+#ifdef STAYOPEN_TMP
+  STAYOPEN_TMPVAR = STAYOPEN_VAR;
+#endif
 
   __libc_lock_unlock (lock);
 }
@@ -182,6 +199,7 @@ ENDFUNC_NAME (void)
 
       no_more = __nss_next (&nip, ENDFUNC_NAME_STRING, (void **) &fct, 0, 1);
     }
+  nip = NULL;
 
   __libc_lock_unlock (lock);
 }
@@ -214,10 +232,26 @@ INTERNAL (REENTRANT_GETNAME) (LOOKUP_TYPE *resbuf, char *buffer, size_t buflen,
   no_more = setup ((void **) &fct, GETFUNC_NAME_STRING, 0);
   while (! no_more)
     {
+      service_user *current_nip = nip;
+
       status = (*fct) (resbuf, buffer, buflen H_ERRNO_VAR);
 
       no_more = __nss_next (&nip, GETFUNC_NAME_STRING, (void **) &fct,
 			    status, 0);
+
+      if (! no_more && current_nip != nip)
+	/* Call the `setXXent' function.  This wasn't done before.  */
+	do
+	  {
+	    set_function *sfct;
+
+	    no_more = __nss_lookup (&nip, SETFUNC_NAME_STRING,
+				    (void **) &sfct);
+
+	    if (! no_more)
+	      status = (*sfct) (STAYOPEN_TMPVAR);
+	  }
+	while (! no_more && status != NSS_STATUS_SUCCESS);
     }
 
   __libc_lock_unlock (lock);
diff --git a/nss/nss_files/files-XXX.c b/nss/nss_files/files-XXX.c
index 404a9f9..b6702b0 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 427c6bf..5f8b939 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 6bebfa2..1250bb9 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 df0106b..27cc588 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)
diff --git a/nss/nsswitch.c b/nss/nsswitch.c
index 9f27ef80f..8ce1e8d 100644
--- a/nss/nsswitch.c
+++ b/nss/nsswitch.c
@@ -1,21 +1,21 @@
 /* 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 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.  */
+   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 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 <dlfcn.h>
diff --git a/pwd/fgetpwent_r.c b/pwd/fgetpwent_r.c
index 4e5fe99..9bf3397 100644
--- a/pwd/fgetpwent_r.c
+++ b/pwd/fgetpwent_r.c
@@ -1,20 +1,20 @@
 /* Copyright (C) 1991, 1996 Free Software Foundation, Inc.
-This file is part of the GNU C Library.
+   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 <ctype.h>
 #include <stdio.h>
@@ -31,20 +31,36 @@ struct pwent_data {};
 LINE_PARSER
 (,
  STRING_FIELD (result->pw_name, ISCOLON, 0);
- STRING_FIELD (result->pw_passwd, ISCOLON, 0);
- if (result->pw_name[0] == '+' || result->pw_name[0] == '-')
+ if (line[0] == '\0'
+     && (result->pw_name[0] == '+' || result->pw_name[0] == '-'))
    {
-     INT_FIELD_MAYBE_NULL (result->pw_uid, ISCOLON, 0, 10, , 0)
-     INT_FIELD_MAYBE_NULL (result->pw_gid, ISCOLON, 0, 10, , 0)
+     /* This a special case.  We allow lines containing only a `+' sign
+	since this is used for nss_compat.  All other services will
+	reject this entry later.  Initialize all other fields now.  */
+     result->pw_passwd = NULL;
+     result->pw_uid = 0;
+     result->pw_gid = 0;
+     result->pw_gecos = NULL;
+     result->pw_dir = NULL;
+     result->pw_shell = NULL;
    }
  else
    {
-     INT_FIELD (result->pw_uid, ISCOLON, 0, 10,)
-     INT_FIELD (result->pw_gid, ISCOLON, 0, 10,)
+     STRING_FIELD (result->pw_passwd, ISCOLON, 0);
+     if (result->pw_name[0] == '+' || result->pw_name[0] == '-')
+       {
+	 INT_FIELD_MAYBE_NULL (result->pw_uid, ISCOLON, 0, 10, , 0)
+	 INT_FIELD_MAYBE_NULL (result->pw_gid, ISCOLON, 0, 10, , 0)
+       }
+     else
+       {
+	 INT_FIELD (result->pw_uid, ISCOLON, 0, 10,)
+	 INT_FIELD (result->pw_gid, ISCOLON, 0, 10,)
+       }
+     STRING_FIELD (result->pw_gecos, ISCOLON, 0);
+     STRING_FIELD (result->pw_dir, ISCOLON, 0);
+     result->pw_shell = line;
    }
- STRING_FIELD (result->pw_gecos, ISCOLON, 0);
- STRING_FIELD (result->pw_dir, ISCOLON, 0);
- result->pw_shell = line;
  )
 
 
diff --git a/rellns-sh b/rellns-sh
index f761b6b..2df4721 100755
--- a/rellns-sh
+++ b/rellns-sh
@@ -29,14 +29,14 @@ case $1 in
 
   if test -d $2; then
     fromname=.
-    from=`echo $2 | sed 's%/$%%' | sed 's%^/%%'`
+    from=`echo $2 | sed 's%/$%%'`
   else
     fromname=`echo $2 | sed 's%.*/\([^/]*\)$%\1%'`
-    from=`echo $2 | sed "s%/*$fromname$%%" | sed 's%^/%%'`
+    from=`echo $2 | sed "s%/*$fromname$%%"`
   fi
 
   case $from in
-  /*) ;;
+  /*) from=`echo $from | sed 's%^/%%'` ;;
   ?*) from=`cd $from && pwd | sed 's%^/%%'` ;;
   *) from=`pwd | sed 's%^/%%'` ;;
   esac
diff --git a/shadow/sgetspent_r.c b/shadow/sgetspent_r.c
index 5270a2a..bba90d7 100644
--- a/shadow/sgetspent_r.c
+++ b/shadow/sgetspent_r.c
@@ -36,33 +36,48 @@ struct spent_data {};
 LINE_PARSER
 (,
  STRING_FIELD (result->sp_namp, ISCOLON, 0);
- STRING_FIELD (result->sp_pwdp, ISCOLON, 0);
- INT_FIELD (result->sp_lstchg, ISCOLON, 0, 10, (long int));
- INT_FIELD (result->sp_min, ISCOLON, 0, 10, (long int));
- INT_FIELD (result->sp_max, ISCOLON, 0, 10, (long int));
- while (isspace (*line))
-   ++line;
- if (*line == '\0')
+ if (line[0] == '\0'
+     && (result->sp_namp[0] == '+' || result->sp_namp[0] == '-'))
    {
-     /* The old form.  */
-     result->sp_warn = (long int) -1;
-     result->sp_inact = (long int) -1;
-     result->sp_expire = (long int) -1;
+     result->sp_pwdp = NULL;
+     result->sp_lstchg = 0;
+     result->sp_min = 0;
+     result->sp_max = 0;
+     result->sp_warn = -1l;
+     result->sp_inact = -1l;
+     result->sp_expire = -1l;
      result->sp_flag = ~0ul;
    }
  else
    {
-     INT_FIELD_MAYBE_NULL (result->sp_warn, ISCOLON, 0, 10, (long int),
-			   (long int) -1);
-     INT_FIELD_MAYBE_NULL (result->sp_inact, ISCOLON, 0, 10, (long int),
-			   (long int) -1);
-     INT_FIELD_MAYBE_NULL (result->sp_expire, ISCOLON, 0, 10, (long int),
-			   (long int) -1);
-     if (*line != '\0')
-       INT_FIELD_MAYBE_NULL (result->sp_flag, FALSE, 0, 10,
-			     (unsigned long int), ~0ul)
+     STRING_FIELD (result->sp_pwdp, ISCOLON, 0);
+     INT_FIELD (result->sp_lstchg, ISCOLON, 0, 10, (long int));
+     INT_FIELD (result->sp_min, ISCOLON, 0, 10, (long int));
+     INT_FIELD (result->sp_max, ISCOLON, 0, 10, (long int));
+     while (isspace (*line))
+       ++line;
+     if (*line == '\0')
+       {
+	 /* The old form.  */
+	 result->sp_warn = -1l;
+	 result->sp_inact = -1l;
+	 result->sp_expire = -1l;
+	 result->sp_flag = ~0ul;
+       }
      else
-       result->sp_flag = ~0ul;
+       {
+	 INT_FIELD_MAYBE_NULL (result->sp_warn, ISCOLON, 0, 10, (long int),
+			       (long int) -1);
+	 INT_FIELD_MAYBE_NULL (result->sp_inact, ISCOLON, 0, 10, (long int),
+			       (long int) -1);
+	 INT_FIELD_MAYBE_NULL (result->sp_expire, ISCOLON, 0, 10, (long int),
+			       (long int) -1);
+	 if (*line != '\0')
+	   INT_FIELD_MAYBE_NULL (result->sp_flag, FALSE, 0, 10,
+				 (unsigned long int), ~0ul)
+	 else
+	   result->sp_flag = ~0ul;
+       }
    }
  )
 
diff --git a/signal/signal.h b/signal/signal.h
index c4cdbca..db7fcb6 100644
--- a/signal/signal.h
+++ b/signal/signal.h
@@ -100,6 +100,10 @@ extern int __sigpause __P ((int __mask));
 extern int sigblock __P ((int __mask));
 extern int sigsetmask __P ((int __mask));
 extern int sigpause __P ((int __mask));
+
+/* This function is here only for compatibility.
+   Use `sigprocmask' instead.  */
+extern int siggetmask __P ((void));
 #endif /* Use BSD.  */
 
 
diff --git a/stdlib/test-canon.c b/stdlib/test-canon.c
index 95a5b78..52a04ca 100644
--- a/stdlib/test-canon.c
+++ b/stdlib/test-canon.c
@@ -28,7 +28,7 @@ Cambridge, MA 02139, USA.  */
 #include <unistd.h>
 #include <sys/param.h>
 
-static char	cwd[1024];
+static char	cwd[PATH_MAX];
 static size_t	cwd_len;
 
 struct {
diff --git a/sysdeps/posix/fpathconf.c b/sysdeps/posix/fpathconf.c
index 1e7cba4..572c0de 100644
--- a/sysdeps/posix/fpathconf.c
+++ b/sysdeps/posix/fpathconf.c
@@ -67,19 +67,11 @@ __fpathconf (fd, name)
 
     case _PC_NAME_MAX:
 #ifdef	NAME_MAX
-      return NAME_MAX;
-#else
-      __set_errno (ENOSYS);
-      return -1;
-#endif
-
-    case _PC_PATH_MAX:
-#ifdef	PATH_MAX
       {
 	struct statfs buf;
 
 	if (__fstatfs (fd, &buf) < 0)
-	  return errno == ENOSYS ? PATH_MAX : -1;
+	  return errno == ENOSYS ? NAME_MAX : -1;
 	else
 	  return buf.f_namelen;
       }
@@ -88,6 +80,14 @@ __fpathconf (fd, name)
       return -1;
 #endif
 
+    case _PC_PATH_MAX:
+#ifdef	PATH_MAX
+      return PATH_MAX;
+#else
+      __set_errno (ENOSYS);
+      return -1;
+#endif
+
     case _PC_PIPE_BUF:
 #ifdef	PIPE_BUF
       return PIPE_BUF;
diff --git a/sysdeps/stub/setenv.c b/sysdeps/stub/setenv.c
index a5172fa..4201190 100644
--- a/sysdeps/stub/setenv.c
+++ b/sysdeps/stub/setenv.c
@@ -38,7 +38,7 @@ unsetenv (name)
   __set_errno (ENOSYS);
 }
 
-stub_warning (unseenv)
+stub_warning (unsetenv)
 
 
 int
diff --git a/sysdeps/unix/sysv/linux/Dist b/sysdeps/unix/sysv/linux/Dist
index 365f046..ce55ab2 100644
--- a/sysdeps/unix/sysv/linux/Dist
+++ b/sysdeps/unix/sysv/linux/Dist
@@ -17,6 +17,7 @@ sys/kdaemon.h
 sys/klog.h
 sys/module.h
 sys/mount.h
+sys/mtio.h
 sys/procfs.h
 sys/quota.h
 sys/socketcall.h
diff --git a/sysdeps/unix/sysv/linux/sys/mtio.h b/sysdeps/unix/sysv/linux/sys/mtio.h
new file mode 100644
index 0000000..918b95d
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/sys/mtio.h
@@ -0,0 +1,32 @@
+/* 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.  */
+
+#ifndef _SYS_MTIO_H
+#define _SYS_MTIO_H	1
+
+/* Get necessary definitions from system and kernel headers.  */
+#include <sys/types.h>
+#include <sys/ioctl.h>
+#include <linux/mtio.h>
+
+/* Specifiy default tape device.  */
+#ifndef DEFTAPE
+# define DEFTAPE	"/dev/tape"
+#endif
+
+#endif /* mtio.h */