1 files changed, 36 insertions, 82 deletions

diff --git a/login/getutid_r.c b/login/getutid_r.c
index 81070157a4..52b83cd862 100644
--- a/login/getutid_r.c
+++ b/login/getutid_r.c
@@ -1,35 +1,45 @@
 /* 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>
+   and Paul Janzen <pcj@primenet.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 <errno.h>
+#include <libc-lock.h>
 #include <string.h>
 #include <unistd.h>
 #include <utmp.h>
 
+#include "utmp-private.h"
+
+
+/* We have to use the lock in getutent_r.c.  */
+__libc_lock_define (extern, __libc_utmp_lock)
+
+/* The jump table is also in getutent_r.c.  */
+extern struct utfuncs *__libc_utmp_jump_table;
+
 
-/* For implementing this function we don't use the getutent_r function
-   because we can avoid the reposition on every new entry this way.  */
 int
-__getutid_r (const struct utmp *id, struct utmp **utmp,
-	     struct utmp_data *utmp_data)
+__getutid_r (const struct utmp *id, struct utmp *buffer, struct utmp **result)
 {
 #if (_HAVE_UT_ID - 0) && (_HAVE_UT_TYPE - 0)
+  int retval = -1;
+
   /* Test whether ID has any of the legal types.  */
   if (id->ut_type != RUN_LVL && id->ut_type != BOOT_TIME
       && id->ut_type != OLD_TIME && id->ut_type != NEW_TIME
@@ -38,77 +48,21 @@ __getutid_r (const struct utmp *id, struct utmp **utmp,
     /* No, using '<' and '>' for the test is not possible.  */
     {
       __set_errno (EINVAL);
+      *result = NULL;
       return -1;
     }
 
-  /* Open utmp file if not already done.  */
-  if (utmp_data->ut_fd == -1)
-    {
-      setutent_r (utmp_data);
-      if (utmp_data->ut_fd == -1)
-	return -1;
-    }
-
-  /* Position file correctly.  */
-  if (lseek (utmp_data->ut_fd, utmp_data->loc_utmp, SEEK_SET) == -1)
-    return -1;
-
-  if (id->ut_type == RUN_LVL || id->ut_type == BOOT_TIME
-      || id->ut_type == OLD_TIME || id->ut_type == NEW_TIME)
-    {
-      /* Search for next entry with type RUN_LVL, BOOT_TIME,
-	 OLD_TIME, or NEW_TIME.  */
-
-      while (1)
-	{
-	  /* Read the next entry.  */
-	  if (read (utmp_data->ut_fd, &utmp_data->ubuf, sizeof (struct utmp))
-	      != sizeof (struct utmp))
-	    {
-	      utmp_data->loc_utmp = 0; /* Mark loc_utmp invalid. */
-	      __set_errno (ESRCH);
-	      return -1;
-	    }
-
-	  /* Update position pointer.  */
-	  utmp_data->loc_utmp += sizeof (struct utmp);
+  __libc_lock_lock (__libc_utmp_lock);
 
-	  if (id->ut_type == utmp_data->ubuf.ut_type)
-	    break;
-	}
-    }
+  /* Not yet initialized.  */
+  if ((*__libc_utmp_jump_table->setutent) (0))
+    retval = (*__libc_utmp_jump_table->getutid_r) (id, buffer, result);
   else
-    {
-      /* Search for the next entry with the specified ID and with type
-	 INIT_PROCESS, LOGIN_PROCESS, USER_PROCESS, or DEAD_PROCESS.  */
-
-      while (1)
-	{
-	  /* Read the next entry.  */
-	  if (read (utmp_data->ut_fd, &utmp_data->ubuf, sizeof (struct utmp))
-	      != sizeof (struct utmp))
-	    {
-	      utmp_data->loc_utmp = 0; /* Mark loc_utmp invalid. */
-	      __set_errno (ESRCH);
-	      return -1;
-	    }
-
-	  /* Update position pointer.  */
-	  utmp_data->loc_utmp += sizeof (struct utmp);
-
-	  if ((   utmp_data->ubuf.ut_type == INIT_PROCESS
-	       || utmp_data->ubuf.ut_type == LOGIN_PROCESS
-	       || utmp_data->ubuf.ut_type == USER_PROCESS
-	       || utmp_data->ubuf.ut_type == DEAD_PROCESS)
-	      && (strncmp (utmp_data->ubuf.ut_id, id->ut_id, sizeof id->ut_id)
-		  == 0))
-	    break;
-	}
-    }
+    *result = NULL;
 
-  *utmp = &utmp_data->ubuf;
+  __libc_lock_unlock (__libc_utmp_lock);
 
-  return 0;
+  return retval;
 #else	/* !_HAVE_UT_ID && !_HAVE_UT_TYPE */
   __set_errno (ENOSYS);
   return -1;