sysdeps/generic/utmp-equal.h

   1 /* Helper function for utmp functions to see if two entries are equal.
   2    Copyright (C) 1996,97,98,99,2000,01,02 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Ulrich Drepper <drepper@cygnus.com>
   5    and Paul Janzen <pcj@primenet.com>, 1996.
   6
   7    The GNU C Library is free software; you can redistribute it and/or
   8    modify it under the terms of the GNU Lesser General Public
   9    License as published by the Free Software Foundation; either
  10    version 2.1 of the License, or (at your option) any later version.
  11
  12    The GNU C Library is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15    Lesser General Public License for more details.
  16
  17    You should have received a copy of the GNU Lesser General Public
  18    License along with the GNU C Library; if not, write to the Free
  19    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  20    02111-1307 USA.  */
  21
  22 #include <string.h>
  23 #include <utmp.h>
  24
  25 #include "utmp-private.h"
  26
  27 /* Test whether two entries match.  */
  28 static int
  29 __utmp_equal (const struct utmp *entry, const struct utmp *match)
  30 {
  31   return
  32     (
  33 #if _HAVE_UT_TYPE - 0
  34      (entry->ut_type == INIT_PROCESS
  35       || entry->ut_type == LOGIN_PROCESS
  36       || entry->ut_type == USER_PROCESS
  37       || entry->ut_type == DEAD_PROCESS)
  38      &&
  39      (match->ut_type == INIT_PROCESS
  40       || match->ut_type == LOGIN_PROCESS
  41       || match->ut_type == USER_PROCESS
  42       || match->ut_type == DEAD_PROCESS)
  43      &&
  44 #endif
  45 #if _HAVE_UT_ID - 0
  46      (entry->ut_id[0] && match->ut_id[0]
  47       ? strncmp (entry->ut_id, match->ut_id, sizeof match->ut_id) == 0
  48       : strncmp (entry->ut_line, match->ut_line, sizeof match->ut_line) == 0)
  49 #else
  50      strncmp (entry->ut_line, match->ut_line, sizeof match->ut_line) == 0
  51 #endif
  52      );
  53 }