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/* Test for nonblocking read and write on pipes.
Copyright (C) 2011-2023 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
#include <config.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/time.h>
#if defined _WIN32 && ! defined __CYGWIN__
# include <process.h>
#else
# include <spawn.h>
#endif
#include "nonblocking.h"
#include "wait-process.h"
#include "macros.h"
#include "test-nonblocking-pipe.h"
#define PROG_ROLE "main"
#include "test-nonblocking-writer.h"
int
main (int argc, char *argv[])
{
const char *child_path;
int test;
int fd[2];
pid_t child;
int exitcode;
child_path = argv[1];
test = atoi (argv[2]);
/* Create a pipe. */
ASSERT (pipe (fd) >= 0);
/* Map fd[0] to STDIN_FILENO and fd[1] to STDOUT_FILENO, because on Windows,
the only three file descriptors that are inherited by child processes are
STDIN_FILENO, STDOUT_FILENO, STDERR_FILENO. */
if (fd[0] != STDIN_FILENO)
{
ASSERT (dup2 (fd[0], STDIN_FILENO) >= 0);
close (fd[0]);
}
if (fd[1] != STDOUT_FILENO)
{
ASSERT (dup2 (fd[1], STDOUT_FILENO) >= 0);
close (fd[1]);
}
/* Prepare the file descriptors. */
if (test & 1)
ASSERT (set_nonblocking_flag (STDOUT_FILENO, true) >= 0);
if (test & 2)
ASSERT (set_nonblocking_flag (STDIN_FILENO, true) >= 0);
/* Spawn the child process. */
{
const char *child_argv[3];
child_argv[0] = child_path;
child_argv[1] = argv[2];
child_argv[2] = NULL;
#if defined _WIN32 && ! defined __CYGWIN__
child = _spawnvpe (P_NOWAIT, child_path, child_argv,
(const char **) environ);
ASSERT (child >= 0);
#else
{
pid_t child_pid;
int err =
posix_spawnp (&child_pid, child_path, NULL, NULL, (char **) child_argv,
environ);
ASSERT (err == 0);
child = child_pid;
}
#endif
}
/* Close unused file descriptors. */
close (STDIN_FILENO);
exitcode =
main_writer_loop (test, PIPE_DATA_BLOCK_SIZE, STDOUT_FILENO, false);
{
int err =
wait_subprocess (child, child_path, false, false, false, false, NULL);
ASSERT (err == 0);
}
return exitcode;
}
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