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/*
* poll_posix: poll compatibility wrapper for POSIX systems
* Copyright © 2013 RealVNC Ltd.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include <config.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <stdlib.h>
#include "libusbi.h"
int usbi_pipe(int pipefd[2])
{
#if defined(HAVE_PIPE2)
int ret = pipe2(pipefd, O_CLOEXEC);
#else
int ret = pipe(pipefd);
#endif
if (ret != 0) {
usbi_err(NULL, "failed to create pipe, errno=%d", errno);
return ret;
}
#if !defined(HAVE_PIPE2) && defined(FD_CLOEXEC)
ret = fcntl(pipefd[0], F_GETFD);
if (ret == -1) {
usbi_err(NULL, "failed to get pipe fd flags, errno=%d", errno);
goto err_close_pipe;
}
ret = fcntl(pipefd[0], F_SETFD, ret | FD_CLOEXEC);
if (ret == -1) {
usbi_err(NULL, "failed to set pipe fd flags, errno=%d", errno);
goto err_close_pipe;
}
ret = fcntl(pipefd[1], F_GETFD);
if (ret == -1) {
usbi_err(NULL, "failed to get pipe fd flags, errno=%d", errno);
goto err_close_pipe;
}
ret = fcntl(pipefd[1], F_SETFD, ret | FD_CLOEXEC);
if (ret == -1) {
usbi_err(NULL, "failed to set pipe fd flags, errno=%d", errno);
goto err_close_pipe;
}
#endif
ret = fcntl(pipefd[1], F_GETFL);
if (ret == -1) {
usbi_err(NULL, "failed to get pipe fd status flags, errno=%d", errno);
goto err_close_pipe;
}
ret = fcntl(pipefd[1], F_SETFL, ret | O_NONBLOCK);
if (ret == -1) {
usbi_err(NULL, "failed to set pipe fd status flags, errno=%d", errno);
goto err_close_pipe;
}
return 0;
err_close_pipe:
close(pipefd[0]);
close(pipefd[1]);
return ret;
}
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