nptl/tst-cancel4_2.c

   1 /* Check recvmmsg cancellation.
   2
   3    Copyright (C) 2016-2022 Free Software Foundation, Inc.
   4    This file is part of the GNU C Library.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <https://www.gnu.org/licenses/>.  */
  19
  20 #include <stdio.h>
  21 #include <stddef.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <sys/types.h>
  25 #include <sys/socket.h>
  26 #include <sys/un.h>
  27 #include <sys/ipc.h>
  28 #include <sys/msg.h>
  29 #include <unistd.h>
  30 #include <errno.h>
  31 #include <pthread.h>
  32
  33 #include "tst-cancel4-common.h"
  34
  35 static void *
  36 tf_recvmmsg (void *arg)
  37 {
  38   struct sockaddr_un sun;
  39
  40   tempfd = socket (AF_UNIX, SOCK_DGRAM, 0);
  41   if (tempfd == -1)
  42     FAIL_EXIT1 ("socket (AF_UNIX, SOCK_DGRAM, 0): %m");
  43
  44   int tries = 0;
  45   do
  46     {
  47       if (++tries > 10)
  48         FAIL_EXIT1 ("too many unsuccessful bind calls");
  49
  50       strcpy (sun.sun_path, "/tmp/tst-cancel4-socket-5-XXXXXX");
  51       if (mktemp (sun.sun_path) == NULL)
  52         FAIL_EXIT1 ("cannot generate temp file name");
  53
  54       sun.sun_family = AF_UNIX;
  55     }
  56   while (bind (tempfd, (struct sockaddr *) &sun,
  57                offsetof (struct sockaddr_un, sun_path)
  58                + strlen (sun.sun_path) + 1) != 0);
  59
  60   tempfname = strdup (sun.sun_path);
  61
  62   tempfd2 = socket (AF_UNIX, SOCK_DGRAM, 0);
  63   if (tempfd2 == -1)
  64     FAIL_EXIT1 ("socket (AF_UNIX, SOCK_DGRAM, 0): %m");
  65
  66   int r = pthread_barrier_wait (&b2);
  67   if (r != 0 && r != PTHREAD_BARRIER_SERIAL_THREAD)
  68     FAIL_EXIT1 ("pthread_barrier_wait");
  69
  70   if (arg != NULL)
  71     {
  72       r = pthread_barrier_wait (&b2);
  73       if (r != 0 && r != PTHREAD_BARRIER_SERIAL_THREAD)
  74         FAIL_EXIT1 ("pthread_barrier_wait");
  75     }
  76
  77   pthread_cleanup_push (cl, NULL);
  78
  79   char mem[70];
  80   struct iovec iov[1];
  81   iov[0].iov_base = mem;
  82   iov[0].iov_len = arg == NULL ? sizeof (mem) : 0;
  83
  84   struct mmsghdr mm;
  85   mm.msg_hdr.msg_name = &sun;
  86   mm.msg_hdr.msg_namelen = sizeof (sun);
  87   mm.msg_hdr.msg_iov = iov;
  88   mm.msg_hdr.msg_iovlen = 1;
  89   mm.msg_hdr.msg_control = NULL;
  90   mm.msg_hdr.msg_controllen = 0;
  91
  92   ssize_t ret = recvmmsg (tempfd2, &mm, 1, 0, NULL);
  93   if (ret == -1 && errno == ENOSYS)
  94     exit (77);
  95
  96   pthread_cleanup_pop (0);
  97
  98   FAIL_EXIT1 ("recvmmsg returned");
  99 }
 100
 101 struct cancel_tests tests[] =
 102 {
 103   ADD_TEST (recvmmsg, 2, 1),
 104 };
 105 #define ntest_tf (sizeof (tests) / sizeof (tests[0]))
 106
 107 #include "tst-cancel4-common.c"