nptl/tst-cancel4_1.c

   1 /* Check sendmmsg cancellation.
   2
   3    Copyright (C) 2016-2017 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    <http://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_sendmmsg (void *arg)
  37 {
  38   if (arg == NULL)
  39     // XXX If somebody can provide a portable test case in which sendmmsg()
  40     // blocks we can enable this test to run in both rounds.
  41     abort ();
  42
  43   struct sockaddr_un sun;
  44
  45   tempfd = socket (AF_UNIX, SOCK_DGRAM, 0);
  46   if (tempfd == -1)
  47     {
  48       printf ("%s: first socket call failed\n", __FUNCTION__);
  49       exit (1);
  50     }
  51
  52   int tries = 0;
  53   do
  54     {
  55       if (++tries > 10)
  56         {
  57           printf ("%s: too many unsuccessful bind calls\n", __FUNCTION__);
  58         }
  59
  60       strcpy (sun.sun_path, "/tmp/tst-cancel4-socket-7-XXXXXX");
  61       if (mktemp (sun.sun_path) == NULL)
  62         {
  63           printf ("%s: cannot generate temp file name\n", __FUNCTION__);
  64           exit (1);
  65         }
  66
  67       sun.sun_family = AF_UNIX;
  68     }
  69   while (bind (tempfd, (struct sockaddr *) &sun,
  70                offsetof (struct sockaddr_un, sun_path)
  71                + strlen (sun.sun_path) + 1) != 0);
  72   tempfname = strdup (sun.sun_path);
  73
  74   tempfd2 = socket (AF_UNIX, SOCK_DGRAM, 0);
  75   if (tempfd2 == -1)
  76     {
  77       printf ("%s: second socket call failed\n", __FUNCTION__);
  78       exit (1);
  79     }
  80
  81   int r = pthread_barrier_wait (&b2);
  82   if (r != 0 && r != PTHREAD_BARRIER_SERIAL_THREAD)
  83     {
  84       printf ("%s: barrier_wait failed\n", __FUNCTION__);
  85       exit (1);
  86     }
  87
  88   r = pthread_barrier_wait (&b2);
  89   if (r != 0 && r != PTHREAD_BARRIER_SERIAL_THREAD)
  90     {
  91       printf ("%s: 2nd barrier_wait failed\n", __FUNCTION__);
  92       exit (1);
  93     }
  94
  95   pthread_cleanup_push (cl, NULL);
  96
  97   char mem[1];
  98   struct iovec iov[1];
  99   iov[0].iov_base = mem;
 100   iov[0].iov_len = 1;
 101
 102   struct mmsghdr mm;
 103   mm.msg_hdr.msg_name = &sun;
 104   mm.msg_hdr.msg_namelen = (offsetof (struct sockaddr_un, sun_path)
 105                            + strlen (sun.sun_path) + 1);
 106   mm.msg_hdr.msg_iov = iov;
 107   mm.msg_hdr.msg_iovlen = 1;
 108   mm.msg_hdr.msg_control = NULL;
 109   mm.msg_hdr.msg_controllen = 0;
 110
 111   ssize_t ret = sendmmsg (tempfd2, &mm, 1, 0);
 112   if (ret == -1 && errno == ENOSYS)
 113     exit (77);
 114
 115   pthread_cleanup_pop (0);
 116
 117   printf ("%s: sendmmsg returned\n", __FUNCTION__);
 118
 119   exit (1);
 120 }
 121
 122 struct cancel_tests tests[] =
 123 {
 124   ADD_TEST (sendmmsg, 2, 1),
 125 };
 126 #define ntest_tf (sizeof (tests) / sizeof (tests[0]))
 127
 128 #include "tst-cancel4-common.c"