Update.

2000-12-05  H.J. Lu  <hjl@gnu.org>

	* nss/Makefile (routines): Add getnssent and getnssent_r.
	* nss/nsswitch.h (__nss_setent): New internal NSS function.
	(__nss_endent): Likewise.
	(__nss_getent_r): Likewise.
	(__nss_getent): Likewise.
	* nss/getnssent_r.c: New file.
	* nss/getnssent.c: New file.
	* nss/getXXent.c (H_ERRNO_VAR): Updated.
	(GETFUNC_NAME): Updated to call __nss_getent ().
	* nss/getXXent_r.c (H_ERRNO_VAR_P): New.
	(STAYOPEN_TMPVAR): Updated.
	(STAYOPEN_VAR): Updated.
	(SETFUNC_NAME): Updated to call __nss_setent ().
	(ENDFUNC_NAME): Updated to call __nss_endent ().
	(INTERNAL (REENTRANT_GETNAME)): Updated to call __nss_getent_r ().

1 files changed, 201 insertions, 0 deletions

diff --git a/nss/getnssent_r.c b/nss/getnssent_r.c
new file mode 100644
index 0000000000..fd8c81f201
--- /dev/null
+++ b/nss/getnssent_r.c
@@ -0,0 +1,201 @@
+/* Copyright (C) 2000 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <errno.h>
+#include <netdb.h>
+#include "nsswitch.h"
+
+/* Set up NIP to run through the services.  If ALL is zero, use NIP's
+   current location if it's not nil.  Return nonzero if there are no
+   services (left).  */
+static int
+setup (const char *func_name, db_lookup_function lookup_fct,
+       void **fctp, service_user **nip, service_user **startp, int all)
+{
+  int no_more;
+  if (*startp == NULL)
+    {
+      no_more = lookup_fct (nip, func_name, fctp);
+      *startp = no_more ? (service_user *) -1l : *nip;
+    }
+  else if (*startp == (service_user *) -1l)
+    /* No services at all.  */
+    return 1;
+  else
+    {
+      if (all || !*nip)
+	/* Reset to the beginning of the service list.  */
+	*nip = *startp;
+      /* Look up the first function.  */
+      no_more = __nss_lookup (nip, func_name, fctp);
+    }
+  return no_more;
+}
+
+void
+__nss_setent (const char *func_name, db_lookup_function lookup_fct,
+	      service_user **nip, service_user **startp,
+	      service_user **last_nip, int stayopen, int *stayopen_tmp,
+	      int res)
+{
+  setent_function fct;
+  int no_more;
+
+  if (res && (_res.options & RES_INIT) == 0
+      && __res_ninit (&_res) == -1)
+    {
+      __set_h_errno (NETDB_INTERNAL);
+      return;
+    }
+
+  /* Cycle through the services and run their `setXXent' functions until
+     we find an available service.  */
+  no_more = setup (func_name, lookup_fct, (void **) &fct, nip,
+		   startp, 1);
+  while (! no_more)
+    {
+      int is_last_nip = *nip == *last_nip;
+      enum nss_status status;
+      
+      if (stayopen_tmp)
+	status = DL_CALL_FCT (fct, (*stayopen_tmp));
+      else
+	status = DL_CALL_FCT (fct, (0));
+
+      no_more = __nss_next (nip, func_name, (void **) &fct,
+			    status, 0);
+      if (is_last_nip)
+	*last_nip = *nip;
+    }
+
+  if (stayopen_tmp)
+    *stayopen_tmp = stayopen;
+}
+
+
+void
+__nss_endent (const char *func_name, db_lookup_function lookup_fct,
+	      service_user **nip, service_user **startp,
+	      service_user **last_nip, int res)
+{
+  endent_function fct;
+  int no_more;
+
+  if (res && (_res.options & RES_INIT) == 0
+      && __res_ninit (&_res) == -1)
+    {
+      __set_h_errno (NETDB_INTERNAL);
+      return;
+    }
+
+  /* Cycle through all the services and run their endXXent functions.  */
+  no_more = setup (func_name, lookup_fct, (void **) &fct, nip, startp, 1);
+  while (! no_more)
+    {
+      /* Ignore status, we force check in __NSS_NEXT.  */
+      DL_CALL_FCT (fct, ());
+
+      if (*nip == *last_nip)
+	/* We have processed all services which were used.  */
+	break;
+
+      no_more = __nss_next (nip, func_name, (void **) &fct, 0, 1);
+    }
+  *last_nip = *nip = NULL;
+}
+
+
+int
+__nss_getent_r (const char *getent_func_name,
+		const char *setent_func_name,
+		db_lookup_function lookup_fct,
+		service_user **nip, service_user **startp,
+		service_user **last_nip, int *stayopen_tmp, int res,
+		void *resbuf, char *buffer, size_t buflen,
+		void **result, int *h_errnop)
+{
+  getent_function fct;
+  int no_more;
+  enum nss_status status;
+
+  if (res && (_res.options & RES_INIT) == 0
+      && __res_ninit (&_res) == -1)
+    {
+      __set_h_errno (NETDB_INTERNAL);
+      *result = NULL;
+      return errno;
+    }
+
+  /* Initialize status to return if no more functions are found.  */
+  status = NSS_STATUS_NOTFOUND;
+
+  /* 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 (getent_func_name, lookup_fct, (void **) &fct, nip,
+		   startp, 0);
+  while (! no_more)
+    {
+      int is_last_nip = *nip == *last_nip;
+
+      status = DL_CALL_FCT (fct,
+			     (resbuf, buffer, buflen, &errno, &h_errno));
+
+      /* The the status is NSS_STATUS_TRYAGAIN and errno is ERANGE the
+	 provided buffer is too small.  In this case we should give
+	 the user the possibility to enlarge the buffer and we should
+	 not simply go on with the next service (even if the TRYAGAIN
+	 action tells us so).  */
+      if (status == NSS_STATUS_TRYAGAIN
+	  && (h_errnop == NULL || *h_errnop == NETDB_INTERNAL)
+	  && errno == ERANGE)
+	break;
+
+      do
+	{
+	  no_more = __nss_next (nip, getent_func_name, (void **) &fct,
+				status, 0);
+
+	  if (is_last_nip)
+	    *last_nip = *nip;
+
+	  if (! no_more)
+	    {
+	      /* Call the `setXXent' function.  This wasn't done before.  */
+	      setent_function sfct;
+
+	      no_more = __nss_lookup (nip, setent_func_name,
+				      (void **) &sfct);
+
+	      if (! no_more)
+	        {
+		  if (stayopen_tmp)
+		    status = DL_CALL_FCT (sfct, (*stayopen_tmp));
+		  else
+		    status = DL_CALL_FCT (sfct, (0));
+		}
+	      else
+		status = NSS_STATUS_NOTFOUND;
+	    }
+	}
+      while (! no_more && status != NSS_STATUS_SUCCESS);
+    }
+
+  *result = status == NSS_STATUS_SUCCESS ? resbuf : NULL;
+  return status == NSS_STATUS_SUCCESS ? 0 : errno;
+}