granicus.if.org Git - strace/blob - tests/ipc_shm.c

   1 /*
   2  * Copyright (c) 2015 Elvira Khabirova <lineprinter0@gmail.com>
   3  * Copyright (c) 2015-2016 Dmitry V. Levin <ldv@altlinux.org>
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. The name of the author may not be used to endorse or promote products
  15  *    derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 #include "tests.h"
  30 #include <errno.h>
  31 #include <stdio.h>
  32 #include <stdlib.h>
  33 #include <sys/shm.h>
  34
  35 static int id = -1;
  36
  37 static void
  38 cleanup(void)
  39 {
  40         shmctl(id, IPC_RMID, NULL);
  41         printf("shmctl\\(%d, (IPC_64\\|)?IPC_RMID, NULL\\) += 0\n", id);
  42         id = -1;
  43 }
  44
  45 int
  46 main(void)
  47 {
  48         int rc;
  49         struct shmid_ds ds;
  50
  51         id = shmget(IPC_PRIVATE, 1, 0600);
  52         if (id < 0)
  53                 perror_msg_and_skip("shmget");
  54         printf("shmget\\(IPC_PRIVATE, 1, 0600\\) += %d\n", id);
  55         atexit(cleanup);
  56
  57         if (shmctl(id, IPC_STAT, &ds))
  58                 perror_msg_and_skip("shmctl IPC_STAT");
  59         printf("shmctl\\(%d, (IPC_64\\|)?IPC_STAT, \\{shm_perm=\\{uid=%u, gid=%u, "
  60                 "mode=%#o, key=%u, cuid=%u, cgid=%u\\}, shm_segsz=%u, shm_cpid=%u, "
  61                 "shm_lpid=%u, shm_nattch=%u, shm_atime=%u, shm_dtime=%u, "
  62                 "shm_ctime=%u\\}\\) += 0\n",
  63                 id, (unsigned) ds.shm_perm.uid, (unsigned) ds.shm_perm.gid,
  64                 (unsigned) ds.shm_perm.mode, (unsigned) ds.shm_perm.__key,
  65                 (unsigned) ds.shm_perm.cuid, (unsigned) ds.shm_perm.cgid,
  66                 (unsigned) ds.shm_segsz, (unsigned) ds.shm_cpid,
  67                 (unsigned) ds.shm_lpid, (unsigned) ds.shm_nattch,
  68                 (unsigned) ds.shm_atime, (unsigned) ds.shm_dtime,
  69                 (unsigned) ds. shm_ctime);
  70
  71         int max = shmctl(0, SHM_INFO, &ds);
  72         if (max < 0)
  73                 perror_msg_and_skip("shmctl SHM_INFO");
  74         printf("shmctl\\(0, (IPC_64\\|)?SHM_INFO, %p\\) += %d\n", &ds, max);
  75
  76         rc = shmctl(id, SHM_STAT, &ds);
  77         if (rc != id) {
  78                 /*
  79                  * In linux < v2.6.24-rc1 the first argument must be
  80                  * an index in the kernel's internal array.
  81                  */
  82                 if (-1 != rc || EINVAL != errno)
  83                         perror_msg_and_skip("shmctl SHM_STAT");
  84                 printf("shmctl\\(%d, (IPC_64\\|)?SHM_STAT, %p\\) += -1 EINVAL \\(%m\\)\n", id, &ds);
  85         } else {
  86                 printf("shmctl\\(%d, (IPC_64\\|)?SHM_STAT, %p\\) += %d\n", id, &ds, id);
  87         }
  88
  89         return 0;
  90 }