Update.

2004-04-02  Jakub Jelinek  <jakub@redhat.com>

	* nis/nss: Add SERVICES_AUTHORITATIVE.
	* nis/nss-nis.h (NSS_FLAG_SET, NSS_FLAG_NETID_AUTHORITATIVE,
	NSS_FLAG_SERVICES_AUTHORITATIVE): Define.
	(_nis_default_nss_flags, _nis_check_default_nss): New decls.
	(_nis_default_nss): New inline.
	* nis/nss-nis.c: Include ctype.h, stdio.h and stdio_ext.h.
	(_nis_default_nss_flags, default_nss): New variables.
	(_nis_check_default_nss): New function.
	* nis/nss_nis/nis-initgroups.c: Don't include stdio.h and
	stdio_ext.h.
	(check_default_nss, default_nss): Move to nss-nis.c.
	(init): Removed.
	(_nss_nis_initgroups_dyn): Use _nis_default_nss ().
	* nis/nss_nis/nis-services.c (_nss_nis_getservbyname_r): If
	NSS_FLAG_SERVICES_AUTHORITATIVE and services.byservicename lookup
	fails, return immediately.

4 files changed, 100 insertions, 80 deletions

diff --git a/nis/nss-nis.c b/nis/nss-nis.c
index 7f91e64..eef73c4 100644
--- a/nis/nss-nis.c
+++ b/nis/nss-nis.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1996, 2001 Free Software Foundation, Inc.
+/* Copyright (C) 1996, 2001, 2004 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
@@ -16,6 +16,9 @@
    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
    02111-1307 USA.  */
 
+#include <ctype.h>
+#include <stdio.h>
+#include <stdio_ext.h>
 #include <rpcsvc/ypclnt.h>
 
 #include "nss-nis.h"
@@ -45,3 +48,81 @@ const enum nss_status __yperr2nss_tab[] =
 };
 const unsigned int __yperr2nss_count = (sizeof (__yperr2nss_tab)
 				        / sizeof (__yperr2nss_tab[0]));
+
+int _nis_default_nss_flags;
+
+static const char default_nss[] = "/etc/default/nss";
+
+int
+_nis_check_default_nss (void)
+{
+  FILE *fp = fopen (default_nss, "rc");
+  int flags = NSS_FLAG_SET;
+  if (fp != NULL)
+    {
+      char *line = NULL;
+      size_t linelen = 0;
+
+      __fsetlocking (fp, FSETLOCKING_BYCALLER);
+
+      while (!feof_unlocked (fp))
+	{
+	  ssize_t n = getline (&line, &linelen, fp);
+	  if (n <= 0)
+	    break;
+
+	  /* There currently are only two variables we expect, so
+	     simplify the parsing.  Recognize only
+
+	       NETID_AUTHORITATIVE = TRUE
+	       SERVICES_AUTHORITATIVE = TRUE
+
+	     with arbitrary white spaces.  */
+	  char *cp = line;
+	  while (isspace (*cp))
+	    ++cp;
+
+	  /* Recognize comment lines.  */
+	  if (*cp == '#')
+	    continue;
+
+	  static const char netid_authoritative[] = "NETID_AUTHORITATIVE";
+	  static const char services_authoritative[]
+	    = "SERVICES_AUTHORITATIVE";
+	  size_t flag_len;
+	  if (strncmp (cp, netid_authoritative,
+		       flag_len = sizeof (netid_authoritative) - 1) != 0
+	      && strncmp (cp, services_authoritative,
+			  flag_len = sizeof (services_authoritative) - 1)
+		 != 0)
+	    continue;
+
+	  cp += flag_len;
+	  while (isspace (*cp))
+	    ++cp;
+	  if (*cp++ != '=')
+	    continue;
+	  while (isspace (*cp))
+	    ++cp;
+
+	  if (strncmp (cp, "TRUE", 4) != 0)
+	    continue;
+	  cp += 4;
+
+	  while (isspace (*cp))
+	    ++cp;
+
+	  if (*cp == '\0')
+	    flags |= flag_len == sizeof (netid_authoritative) - 1
+		     ? NSS_FLAG_NETID_AUTHORITATIVE
+		     : NSS_FLAG_SERVICES_AUTHORITATIVE;
+	}
+
+      free (line);
+
+      fclose (fp);
+    }
+
+  _nis_default_nss_flags = flags;
+  return flags;
+}
diff --git a/nis/nss-nis.h b/nis/nss-nis.h
index 47b0a67..659b3a1 100644
--- a/nis/nss-nis.h
+++ b/nis/nss-nis.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 1996 Free Software Foundation, Inc.
+/* Copyright (C) 1996, 2004 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
@@ -36,4 +36,16 @@ yperr2nss (int errval)
   return __yperr2nss_tab[(unsigned int) errval];
 }
 
+#define NSS_FLAG_SET			1
+#define NSS_FLAG_NETID_AUTHORITATIVE	2
+#define NSS_FLAG_SERVICES_AUTHORITATIVE	4
+extern int _nis_default_nss_flags attribute_hidden;
+extern int _nis_check_default_nss (void) attribute_hidden;
+
+extern inline __attribute__((always_inline)) int
+_nis_default_nss (void)
+{
+  return _nis_default_nss_flags ?: _nis_check_default_nss ();
+}
+
 #endif /* nis/nss-nis.h */
diff --git a/nis/nss_nis/nis-initgroups.c b/nis/nss_nis/nis-initgroups.c
index e3ba0cd..c1efe9d 100644
--- a/nis/nss_nis/nis-initgroups.c
+++ b/nis/nss_nis/nis-initgroups.c
@@ -23,8 +23,6 @@
 #include <grp.h>
 #include <nss.h>
 #include <pwd.h>
-#include <stdio.h>
-#include <stdio_ext.h>
 #include <string.h>
 #include <unistd.h>
 #include <rpcsvc/yp.h>
@@ -129,78 +127,6 @@ internal_getgrent_r (struct group *grp, char *buffer, size_t buflen,
 }
 
 
-static int init;
-static int use_netid;
-
-
-static const char default_nss[] = "/etc/default/nss";
-
-static void
-check_default_nss (void)
-{
-  FILE *fp = fopen (default_nss, "rc");
-  if (fp != NULL)
-    {
-      char *line = NULL;
-      size_t linelen = 0;
-
-      __fsetlocking (fp, FSETLOCKING_BYCALLER);
-
-      while (!feof_unlocked (fp))
-	{
-	  ssize_t n = getline (&line, &linelen, fp);
-	  if (n <= 0)
-	    break;
-
-	  /* There currently is only one variable we expect, so
-	     simplify the parsing.  Recognize only
-
-	       NETID_AUTHORITATIVE = TRUE
-
-	     with arbitrary white spaces.  */
-	  char *cp = line;
-	  while (isspace (*cp))
-	    ++cp;
-
-	  /* Recognize comment lines.  */
-	  if (*cp == '#')
-	    continue;
-
-	  static const char netid_authoritative[] = "NETID_AUTHORITATIVE";
-	  if (strncmp (cp, netid_authoritative,
-		       sizeof (netid_authoritative) - 1) != 0)
-	    continue;
-
-	  cp += sizeof (netid_authoritative) - 1;
-	  while (isspace (*cp))
-	    ++cp;
-	  if (*cp++ != '=')
-	    continue;
-	  while (isspace (*cp))
-	    ++cp;
-
-	  if (strncmp (cp, "TRUE", 4) != 0)
-	    continue;
-	  cp +=4;
-
-	  while (isspace (*cp))
-	    ++cp;
-
-	  if (*cp == '\0')
-	    use_netid = 1;
-
-	  /* For now, just drop out of the loop.  */
-	  break;
-	}
-
-      free (line);
-
-      fclose (fp);
-    }
-  init = 1;
-}
-
-
 static int
 get_uid (const char *user, uid_t *uidp)
 {
@@ -321,10 +247,7 @@ _nss_nis_initgroups_dyn (const char *user, gid_t group, long int *start,
     return NSS_STATUS_UNAVAIL;
 
   /* Check whether we are supposed to use the netid.byname map.  */
-  if (!init)
-    check_default_nss ();
-
-  if (use_netid)
+  if (_nis_default_nss () & NSS_FLAG_NETID_AUTHORITATIVE)
     {
       /* We need the user ID.  */
       uid_t uid;
diff --git a/nis/nss_nis/nis-service.c b/nis/nss_nis/nis-service.c
index 6e086e4..32ac619 100644
--- a/nis/nss_nis/nis-service.c
+++ b/nis/nss_nis/nis-service.c
@@ -330,6 +330,10 @@ _nss_nis_getservbyname_r (const char *name, const char *protocol,
 	return NSS_STATUS_SUCCESS;
     }
 
+  /* Check if it is safe to rely on services.byservicename.  */
+  if (_nis_default_nss () & NSS_FLAG_SERVICES_AUTHORITATIVE)
+    return status;
+
   struct ypall_callback ypcb;
   struct search_t req;