tests/test-nonblocking.c

   1 /* Test manipulation of non-blocking flag.
   2    Copyright (C) 2011-2020 Free Software Foundation, Inc.
   3
   4    This program is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  16
  17 /* Written by Eric Blake <ebb9@byu.net>, 2011.  */
  18
  19 #include <config.h>
  20
  21 #include "nonblocking.h"
  22
  23 #include <errno.h>
  24 #include <fcntl.h>
  25 #include <sys/socket.h>
  26 #include <unistd.h>
  27
  28 #include "macros.h"
  29
  30 int
  31 main (void)
  32 {
  33   const char *file = "test-nonblock.tmp";
  34   int fd_file;
  35   int fd_pipe[2];
  36
  37   fd_file = creat (file, 0600);
  38
  39   /* Assume std descriptors were provided by invoker.  */
  40   ASSERT (STDERR_FILENO < fd_file);
  41
  42   /* Test regular files; setting nonblocking on file is unspecified.  */
  43   ASSERT (get_nonblocking_flag (fd_file) == 0);
  44   ASSERT (set_nonblocking_flag (fd_file, false) == 0);
  45   ASSERT (get_nonblocking_flag (fd_file) == 0);
  46   ASSERT (close (fd_file) == 0);
  47   ASSERT (unlink (file) == 0);
  48
  49   /* Test directories; setting nonblocking is unspecified.  */
  50   fd_file = open (".", O_RDONLY);
  51   if (STDERR_FILENO < fd_file)
  52     {
  53       /* mingw can't open directories unless fchdir module is active.  */
  54       ASSERT (get_nonblocking_flag (fd_file) == 0);
  55       ASSERT (set_nonblocking_flag (fd_file, false) == 0);
  56       ASSERT (get_nonblocking_flag (fd_file) == 0);
  57       ASSERT (close (fd_file) == 0);
  58     }
  59
  60   /* Test pipes.  */
  61   ASSERT (pipe (fd_pipe) == 0);
  62   ASSERT (get_nonblocking_flag (fd_pipe[0]) == 0);
  63   ASSERT (get_nonblocking_flag (fd_pipe[1]) == 0);
  64   ASSERT (set_nonblocking_flag (fd_pipe[0], true) == 0);
  65   ASSERT (get_nonblocking_flag (fd_pipe[0]) == 1);
  66   ASSERT (get_nonblocking_flag (fd_pipe[1]) == 0);
  67   ASSERT (set_nonblocking_flag (fd_pipe[1], true) == 0);
  68   ASSERT (set_nonblocking_flag (fd_pipe[0], false) == 0);
  69   ASSERT (get_nonblocking_flag (fd_pipe[0]) == 0);
  70   ASSERT (get_nonblocking_flag (fd_pipe[1]) == 1);
  71   ASSERT (close (fd_pipe[0]) == 0);
  72   ASSERT (close (fd_pipe[1]) == 0);
  73
  74 #if GNULIB_TEST_PIPE2
  75   ASSERT (pipe2 (fd_pipe, O_NONBLOCK) == 0);
  76   ASSERT (get_nonblocking_flag (fd_pipe[0]) == 1);
  77   ASSERT (get_nonblocking_flag (fd_pipe[1]) == 1);
  78   ASSERT (close (fd_pipe[0]) == 0);
  79   ASSERT (close (fd_pipe[1]) == 0);
  80 #endif /* GNULIB_TEST_PIPE2 */
  81
  82 #if GNULIB_TEST_SOCKET
  83   {
  84     /* Test sockets.  */
  85     bool sock_works = true;
  86     int fd_sock;
  87
  88 # if defined _WIN32 && ! defined __CYGWIN__
  89     /* For now, we can't get nonblocking status of windows sockets.  */
  90     sock_works = false;
  91 # endif
  92
  93     fd_sock = socket (AF_INET, SOCK_STREAM, 0);
  94     ASSERT (get_nonblocking_flag (fd_sock) == (sock_works ? 0 : -1));
  95     ASSERT (set_nonblocking_flag (fd_sock, true) == 0);
  96     ASSERT (get_nonblocking_flag (fd_sock) == (sock_works ? 1 : -1));
  97     ASSERT (set_nonblocking_flag (fd_sock, false) == 0);
  98     ASSERT (get_nonblocking_flag (fd_sock) == (sock_works ? 0 : -1));
  99     ASSERT (close (fd_sock) == 0);
 100
 101 # if SOCK_NONBLOCK
 102     fd_sock = socket (AF_INET, SOCK_STREAM | SOCK_NONBLOCK, 0);
 103     ASSERT (get_nonblocking_flag (fd_sock) == (sock_works ? 1 : -1));
 104     ASSERT (close (fd_sock) == 0);
 105 # endif /* SOCK_NONBLOCK */
 106   }
 107 #endif /* GNULIB_TEST_SOCKET */
 108
 109   /* Test error handling.  */
 110   {
 111     errno = 0;
 112     ASSERT (get_nonblocking_flag (-1) == -1);
 113     ASSERT (errno == EBADF);
 114   }
 115   {
 116     errno = 0;
 117     ASSERT (set_nonblocking_flag (-1, false) == -1);
 118     ASSERT (errno == EBADF);
 119   }
 120   {
 121     errno = 0;
 122     ASSERT (set_nonblocking_flag (-1, true) == -1);
 123     ASSERT (errno == EBADF);
 124   }
 125   {
 126     errno = 0;
 127     ASSERT (set_nonblocking_flag (getdtablesize (), false) == -1);
 128     ASSERT (errno == EBADF);
 129   }
 130
 131   return 0;
 132 }