tests/test-nonblocking-socket-main.c

   1 /* Test for nonblocking read and write on sockets.
   2
   3    Copyright (C) 2011-2025 Free Software Foundation, Inc.
   4
   5    This program is free software: you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation, either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program 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
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  17
  18 #include <config.h>
  19
  20 #include <errno.h>
  21 #include <stdlib.h>
  22 #include <string.h>
  23 #include <unistd.h>
  24 #include <sys/time.h>
  25 #include <sys/socket.h>
  26
  27 #if defined _WIN32 && ! defined __CYGWIN__
  28 # include <process.h>
  29 #else
  30 # include <spawn.h>
  31 #endif
  32
  33 #include "nonblocking.h"
  34 #include "wait-process.h"
  35
  36 #include "macros.h"
  37 #include "socket-server.h"
  38 #include "test-nonblocking-socket.h"
  39 #define PROG_ROLE "main"
  40 #include "test-nonblocking-writer.h"
  41
  42 int
  43 main (int argc, char *argv[])
  44 {
  45   const char *child_path;
  46   int test;
  47   int server;
  48   int port;
  49   pid_t child;
  50   int server_socket;
  51   int exitcode;
  52
  53   child_path = argv[1];
  54   test = atoi (argv[2]);
  55
  56   /* Create a server socket.  */
  57   server = create_server (0, 1, &port);
  58
  59   /* Spawn the child process.  */
  60   {
  61     char port_arg[10+1];
  62     const char *child_argv[4];
  63
  64     sprintf (port_arg, "%u", port);
  65     child_argv[0] = child_path;
  66     child_argv[1] = argv[2];
  67     child_argv[2] = port_arg;
  68     child_argv[3] = NULL;
  69
  70 #if defined _WIN32 && ! defined __CYGWIN__
  71     child = _spawnvpe (P_NOWAIT, child_path, child_argv,
  72                        (const char **) environ);
  73     ASSERT (child >= 0);
  74 #else
  75     {
  76       pid_t child_pid;
  77       int err =
  78         posix_spawnp (&child_pid, child_path, NULL, NULL, (char **) child_argv,
  79                       environ);
  80       ASSERT (err == 0);
  81       child = child_pid;
  82     }
  83 #endif
  84   }
  85
  86   /* Accept a connection from the child process.  */
  87   server_socket = create_server_socket (server);
  88
  89   /* Prepare the file descriptor.  */
  90   if (test & 1)
  91     ASSERT (set_nonblocking_flag (server_socket, true) >= 0);
  92
  93 #if ENABLE_DEBUGGING
  94 # ifdef SO_SNDBUF
  95   {
  96     int value;
  97     socklen_t value_len = sizeof (value);
  98     if (getsockopt (server_socket, SOL_SOCKET, SO_SNDBUF, &value, &value_len) >= 0)
  99       fprintf (stderr, "SO_SNDBUF = %d\n", value);
 100   }
 101 # endif
 102 # ifdef SO_RCVBUF
 103   {
 104     int value;
 105     socklen_t value_len = sizeof (value);
 106     if (getsockopt (server_socket, SOL_SOCKET, SO_RCVBUF, &value, &value_len) >= 0)
 107       fprintf (stderr, "SO_RCVBUF = %d\n", value);
 108   }
 109 # endif
 110 #endif
 111
 112   exitcode =
 113     main_writer_loop (test, SOCKET_DATA_BLOCK_SIZE, server_socket,
 114                       SOCKET_HAS_LARGE_BUFFER);
 115
 116   {
 117     int err =
 118       wait_subprocess (child, child_path, false, false, false, false, NULL);
 119     ASSERT (err == 0);
 120   }
 121
 122   return (exitcode ? exitcode : test_exit_status);
 123 }