rt/tst-mqueue9.c

   1 /* Copyright (C) 2004 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Jakub Jelinek <jakub@redhat.com>, 2004.
   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 <errno.h>
  21 #include <mqueue.h>
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25 #include <unistd.h>
  26 #include "tst-mqueue.h"
  27
  28 #define TEST_FUNCTION do_test ()
  29 static int
  30 do_test (void)
  31 {
  32   if (geteuid () != 0)
  33     {
  34       puts ("this test requires root");
  35       return 0;
  36     }
  37
  38   char name[sizeof "/tst-mqueue9-" + sizeof (pid_t) * 3];
  39   snprintf (name, sizeof (name), "/tst-mqueue9-%u", getpid ());
  40
  41   struct mq_attr attr = { .mq_maxmsg = 1, .mq_msgsize = 1 };
  42   mqd_t q = mq_open (name, O_CREAT | O_EXCL | O_RDWR, 0600, &attr);
  43
  44   if (q == (mqd_t) -1)
  45     {
  46       printf ("mq_open failed with: %m\n");
  47       return 0;
  48     }
  49   else
  50     add_temp_mq (name);
  51
  52   if (seteuid (1) != 0)
  53     {
  54       printf ("failed to seteuid (1): %m\n");
  55       mq_unlink (name);
  56       return 0;
  57     }
  58
  59   int result = 0;
  60   if (mq_unlink (name) == 0)
  61     {
  62       puts ("mq_unlink unexpectedly succeeded");
  63       result = 1;
  64     }
  65   else if (errno != EACCES)
  66     {
  67       printf ("mq_unlink did not fail with EACCES: %m\n");
  68       result = 1;;
  69     }
  70
  71   if (seteuid (0) != 0)
  72     {
  73       printf ("failed to seteuid (0): %m\n");
  74       result = 1;
  75     }
  76
  77   if (mq_unlink (name) != 0)
  78     {
  79       printf ("mq_unlink failed with: %m\n");
  80       result = 1;
  81     }
  82
  83   if (mq_close (q) != 0)
  84     {
  85       printf ("mq_close failed with: %m\n");
  86       result = 1;
  87     }
  88
  89   return result;
  90 }
  91
  92 #include "../test-skeleton.c"