sysdeps/unix/bsd/bsd4.4/kfreebsd/utmp-compat/getutxid.c

   1 /* Copyright (C) 2002 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Bruno Haible <bruno@clisp.org>, 2002.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <utmpx.h>
  21 #include <stddef.h>
  22 #include <string.h>
  23
  24 extern struct utmpx *__getutxent (void);
  25
  26 struct utmpx *
  27 getutxid (const struct utmpx *id)
  28 {
  29   switch (id->ut_type)
  30     {
  31     case INIT_PROCESS:
  32     case LOGIN_PROCESS:
  33     case USER_PROCESS:
  34     case DEAD_PROCESS:
  35       for (;;)
  36         {
  37           struct utmpx *next = __getutxent ();
  38
  39           if (next == NULL)
  40             return NULL;
  41
  42           switch (next->ut_type)
  43             {
  44             case INIT_PROCESS:
  45             case LOGIN_PROCESS:
  46             case USER_PROCESS:
  47             case DEAD_PROCESS:
  48               if (strncmp (next->ut_id, id->ut_id, sizeof (id->ut_id)) == 0)
  49                 return next;
  50               break;
  51             default:
  52               break;
  53             }
  54         }
  55
  56     default:
  57       for (;;)
  58         {
  59           struct utmpx *next = __getutxent ();
  60
  61           if (next == NULL)
  62             return NULL;
  63
  64           if (next->ut_type == id->ut_type)
  65             return next;
  66         }
  67     }
  68 }