root/maint/gnulib/tests/test-nonblocking-socket-main.c

/* */

DEFINITIONS

1. main

   1 /* Test for nonblocking read and write on sockets.
   2 
   3    Copyright (C) 2011-2021 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 <stdbool.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <unistd.h>
  25 #include <sys/time.h>
  26 #include <sys/socket.h>
  27 
  28 #if defined _WIN32 && ! defined __CYGWIN__
  29 # include <process.h>
  30 #else
  31 # include <spawn.h>
  32 #endif
  33 
  34 #include "nonblocking.h"
  35 #include "wait-process.h"
  36 
  37 #include "macros.h"
  38 #include "socket-server.h"
  39 #include "test-nonblocking-socket.h"
  40 #define PROG_ROLE "main"
  41 #include "test-nonblocking-writer.h"
  42 
  43 int
  44 main (int argc, char *argv[])
     /*  */
  45 {
  46   const char *child_path;
  47   int test;
  48   int server;
  49   int port;
  50   pid_t child;
  51   int server_socket;
  52   int exitcode;
  53 
  54   child_path = argv[1];
  55   test = atoi (argv[2]);
  56 
  57   /* Create a server socket.  */
  58   server = create_server (0, 1, &port);
  59 
  60   /* Spawn the child process.  */
  61   {
  62     char port_arg[10+1];
  63     const char *child_argv[4];
  64 
  65     sprintf (port_arg, "%u", port);
  66     child_argv[0] = child_path;
  67     child_argv[1] = argv[2];
  68     child_argv[2] = port_arg;
  69     child_argv[3] = NULL;
  70 
  71 #if defined _WIN32 && ! defined __CYGWIN__
  72     child = _spawnvpe (P_NOWAIT, child_path, child_argv,
  73                        (const char **) environ);
  74     ASSERT (child >= 0);
  75 #else
  76     {
  77       pid_t child_pid;
  78       int err =
  79         posix_spawnp (&child_pid, child_path, NULL, NULL, (char **) child_argv,
  80                       environ);
  81       ASSERT (err == 0);
  82       child = child_pid;
  83     }
  84 #endif
  85   }
  86 
  87   /* Accept a connection from the child process.  */
  88   server_socket = create_server_socket (server);
  89 
  90   /* Prepare the file descriptor.  */
  91   if (test & 1)
  92     ASSERT (set_nonblocking_flag (server_socket, true) >= 0);
  93 
  94 #if ENABLE_DEBUGGING
  95 # ifdef SO_SNDBUF
  96   {
  97     int value;
  98     socklen_t value_len = sizeof (value);
  99     if (getsockopt (server_socket, SOL_SOCKET, SO_SNDBUF, &value, &value_len) >= 0)
 100       fprintf (stderr, "SO_SNDBUF = %d\n", value);
 101   }
 102 # endif
 103 # ifdef SO_RCVBUF
 104   {
 105     int value;
 106     socklen_t value_len = sizeof (value);
 107     if (getsockopt (server_socket, SOL_SOCKET, SO_RCVBUF, &value, &value_len) >= 0)
 108       fprintf (stderr, "SO_RCVBUF = %d\n", value);
 109   }
 110 # endif
 111 #endif
 112 
 113   exitcode =
 114     main_writer_loop (test, SOCKET_DATA_BLOCK_SIZE, server_socket,
 115                       SOCKET_HAS_LARGE_BUFFER);
 116 
 117   {
 118     int err =
 119       wait_subprocess (child, child_path, false, false, false, false, NULL);
 120     ASSERT (err == 0);
 121   }
 122 
 123   return exitcode;
 124 }

/* */