rt/tst-mqueue9.c

   1 /* Copyright (C) 2004-2020 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, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <errno.h>
  20 #include <mqueue.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <unistd.h>
  25 #include "tst-mqueue.h"
  26
  27 #define TEST_FUNCTION do_test ()
  28 static int
  29 do_test (void)
  30 {
  31   if (geteuid () != 0)
  32     {
  33       puts ("this test requires root");
  34       return 0;
  35     }
  36
  37   char name[sizeof "/tst-mqueue9-" + sizeof (pid_t) * 3];
  38   snprintf (name, sizeof (name), "/tst-mqueue9-%u", getpid ());
  39
  40   struct mq_attr attr = { .mq_maxmsg = 1, .mq_msgsize = 1 };
  41   mqd_t q = mq_open (name, O_CREAT | O_EXCL | O_RDWR, 0600, &attr);
  42
  43   if (q == (mqd_t) -1)
  44     {
  45       printf ("mq_open failed with: %m\n");
  46       return 0;
  47     }
  48   else
  49     add_temp_mq (name);
  50
  51   if (seteuid (1) != 0)
  52     {
  53       printf ("failed to seteuid (1): %m\n");
  54       mq_unlink (name);
  55       return 0;
  56     }
  57
  58   int result = 0;
  59   if (mq_unlink (name) == 0)
  60     {
  61       puts ("mq_unlink unexpectedly succeeded");
  62       result = 1;
  63     }
  64   else if (errno != EACCES)
  65     {
  66       printf ("mq_unlink did not fail with EACCES: %m\n");
  67       result = 1;;
  68     }
  69
  70   if (seteuid (0) != 0)
  71     {
  72       printf ("failed to seteuid (0): %m\n");
  73       result = 1;
  74     }
  75
  76   if (mq_unlink (name) != 0)
  77     {
  78       printf ("mq_unlink failed with: %m\n");
  79       result = 1;
  80     }
  81
  82   if (mq_close (q) != 0)
  83     {
  84       printf ("mq_close failed with: %m\n");
  85       result = 1;
  86     }
  87
  88   return result;
  89 }
  90
  91 #include "../test-skeleton.c"