sysvipc/test-sysvmsg.c

   1 /* Basic tests for SYSV message queue functions.
   2    Copyright (C) 2016-2019 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   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    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <errno.h>
  22 #include <string.h>
  23 #include <sys/types.h>
  24 #include <sys/ipc.h>
  25 #include <sys/msg.h>
  26
  27 #include <support/support.h>
  28 #include <support/check.h>
  29 #include <support/temp_file.h>
  30
  31 #define TEXTSIZE 32
  32 struct msgbuf_t
  33 {
  34 #ifdef _GNU_SOURCE
  35   __syscall_slong_t type;
  36 #else
  37   long type;
  38 #endif
  39   char buf[TEXTSIZE];
  40 };
  41
  42 #define MSGTYPE 0x01020304
  43 #define MSGDATA "0123456789"
  44
  45 /* These are for the temporary file we generate.  */
  46 static char *name;
  47 static int msqid;
  48
  49 static void
  50 remove_msq (void)
  51 {
  52   /* Enforce message queue removal in case of early test failure.
  53      Ignore error since the msgq may already have being removed.  */
  54   msgctl (msqid, IPC_RMID, NULL);
  55 }
  56
  57 static void
  58 do_prepare (int argc, char *argv[])
  59 {
  60   int fd = create_temp_file ("tst-sysvmsg.", &name);
  61   if (fd == -1)
  62     FAIL_EXIT1 ("cannot create temporary file (errno=%d)", errno);
  63 }
  64
  65 #define PREPARE do_prepare
  66
  67 /* It is not an extensive test, but rather a functional one aimed to check
  68    correct parameter passing on kernel.  */
  69
  70 #define MSGQ_MODE 0644
  71
  72 static int
  73 do_test (void)
  74 {
  75   atexit (remove_msq);
  76
  77   key_t key = ftok (name, 'G');
  78   if (key == -1)
  79     FAIL_EXIT1 ("ftok failed");
  80
  81   msqid = msgget (key, MSGQ_MODE | IPC_CREAT);
  82   if (msqid == -1)
  83     {
  84       if (errno == ENOSYS)
  85         FAIL_UNSUPPORTED ("msgget not supported");
  86       FAIL_EXIT1 ("msgget failed (errno=%d)", errno);
  87     }
  88
  89   /* Get message queue kernel information and do some sanity checks.  */
  90   struct msqid_ds msginfo;
  91   if (msgctl (msqid, IPC_STAT, &msginfo) == -1)
  92     FAIL_EXIT1 ("msgctl with IPC_STAT failed (errno=%d)", errno);
  93
  94   if (msginfo.msg_perm.__key != key)
  95     FAIL_EXIT1 ("msgid_ds::msg_perm::key (%d) != %d",
  96                 (int) msginfo.msg_perm.__key, (int) key);
  97   if (msginfo.msg_perm.mode != MSGQ_MODE)
  98     FAIL_EXIT1 ("msgid_ds::msg_perm::mode (%o) != %o",
  99                 msginfo.msg_perm.mode, MSGQ_MODE);
 100   if (msginfo.msg_qnum != 0)
 101     FAIL_EXIT1 ("msgid_ds::msg_qnum (%lu) != 0",
 102                 (long unsigned) msginfo.msg_qnum);
 103
 104   /* Check if last argument (IPC_NOWAIT) is correctly handled.  */
 105   struct msgbuf_t msg2rcv = { 0 };
 106   if (msgrcv (msqid, &msg2rcv, sizeof (msg2rcv.buf), MSGTYPE,
 107               IPC_NOWAIT) == -1
 108       && errno != ENOMSG)
 109     FAIL_EXIT1 ("msgrcv failed (errno=%d)", errno);
 110
 111   struct msgbuf_t msg2snd = { MSGTYPE, MSGDATA };
 112   if (msgsnd (msqid, &msg2snd, sizeof (msg2snd.buf), 0) == -1)
 113     FAIL_EXIT1 ("msgsnd failed (errno=%d)", errno);
 114
 115   if (msgrcv (msqid, &msg2rcv, sizeof (msg2rcv.buf), MSGTYPE, 0) == -1)
 116     FAIL_EXIT1 ("msgrcv failed (errno=%d)", errno);
 117
 118   int ret = 0;
 119   if (strncmp (msg2snd.buf, msg2rcv.buf, TEXTSIZE) != 0)
 120     ret = 1;
 121
 122   if (msgctl (msqid, IPC_RMID, NULL) == -1)
 123     FAIL_EXIT1 ("msgctl failed");
 124
 125   return ret;
 126 }
 127
 128 #include <support/test-driver.c>