nptl/tst-cancel4_1.c

   1 /* Check sendmmsg cancellation.
   2
   3    Copyright (C) 2016-2021 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_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     FAIL_EXIT1 ("socket (AF_UNIX, SOCK_DGRAM, 0): %m");
  48
  49   int tries = 0;
  50   do
  51     {
  52       if (++tries > 10)
  53         FAIL_EXIT1 ("too many unsuccessful bind calls");
  54
  55       strcpy (sun.sun_path, "/tmp/tst-cancel4-socket-7-XXXXXX");
  56       if (mktemp (sun.sun_path) == NULL)
  57         FAIL_EXIT1 ("cannot generate temp file name");
  58
  59       sun.sun_family = AF_UNIX;
  60     }
  61   while (bind (tempfd, (struct sockaddr *) &sun,
  62                offsetof (struct sockaddr_un, sun_path)
  63                + strlen (sun.sun_path) + 1) != 0);
  64   tempfname = strdup (sun.sun_path);
  65
  66   tempfd2 = socket (AF_UNIX, SOCK_DGRAM, 0);
  67   if (tempfd2 == -1)
  68     FAIL_EXIT1 ("socket (AF_UNIX, SOCK_DGRAM, 0): %m");
  69
  70   int r = pthread_barrier_wait (&b2);
  71   if (r != 0 && r != PTHREAD_BARRIER_SERIAL_THREAD)
  72     FAIL_EXIT1 ("pthread_barrier_wait");
  73
  74   r = pthread_barrier_wait (&b2);
  75   if (r != 0 && r != PTHREAD_BARRIER_SERIAL_THREAD)
  76     FAIL_EXIT1 ("pthread_barrier_wait");
  77
  78   pthread_cleanup_push (cl, NULL);
  79
  80   char mem[1];
  81   struct iovec iov[1];
  82   iov[0].iov_base = mem;
  83   iov[0].iov_len = 1;
  84
  85   struct mmsghdr mm;
  86   mm.msg_hdr.msg_name = &sun;
  87   mm.msg_hdr.msg_namelen = (offsetof (struct sockaddr_un, sun_path)
  88                            + strlen (sun.sun_path) + 1);
  89   mm.msg_hdr.msg_iov = iov;
  90   mm.msg_hdr.msg_iovlen = 1;
  91   mm.msg_hdr.msg_control = NULL;
  92   mm.msg_hdr.msg_controllen = 0;
  93
  94   ssize_t ret = sendmmsg (tempfd2, &mm, 1, 0);
  95   if (ret == -1 && errno == ENOSYS)
  96     exit (77);
  97
  98   pthread_cleanup_pop (0);
  99
 100   FAIL_EXIT1 ("sendmmsg returned");
 101 }
 102
 103 struct cancel_tests tests[] =
 104 {
 105   ADD_TEST (sendmmsg, 2, 1),
 106 };
 107 #define ntest_tf (sizeof (tests) / sizeof (tests[0]))
 108
 109 #include "tst-cancel4-common.c"