78 lines
2.6 KiB
C++
78 lines
2.6 KiB
C++
/*
|
|
* Copyright (C) 2016 Igalia S.L.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
|
|
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR
|
|
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
|
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
|
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
|
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
|
|
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include "config.h"
|
|
#include <wtf/UniStdExtras.h>
|
|
|
|
#include <fcntl.h>
|
|
|
|
namespace WTF {
|
|
|
|
bool setCloseOnExec(int fileDescriptor)
|
|
{
|
|
int returnValue = -1;
|
|
do {
|
|
int flags = fcntl(fileDescriptor, F_GETFD);
|
|
if (flags != -1)
|
|
returnValue = fcntl(fileDescriptor, F_SETFD, flags | FD_CLOEXEC);
|
|
} while (returnValue == -1 && errno == EINTR);
|
|
|
|
return returnValue != -1;
|
|
}
|
|
|
|
int dupCloseOnExec(int fileDescriptor)
|
|
{
|
|
int duplicatedFileDescriptor = -1;
|
|
#ifdef F_DUPFD_CLOEXEC
|
|
while ((duplicatedFileDescriptor = fcntl(fileDescriptor, F_DUPFD_CLOEXEC, 0)) == -1 && errno == EINTR) { }
|
|
if (duplicatedFileDescriptor != -1)
|
|
return duplicatedFileDescriptor;
|
|
|
|
#endif
|
|
|
|
while ((duplicatedFileDescriptor = dup(fileDescriptor)) == -1 && errno == EINTR) { }
|
|
if (duplicatedFileDescriptor == -1)
|
|
return -1;
|
|
|
|
if (!setCloseOnExec(duplicatedFileDescriptor)) {
|
|
closeWithRetry(duplicatedFileDescriptor);
|
|
return -1;
|
|
}
|
|
|
|
return duplicatedFileDescriptor;
|
|
}
|
|
|
|
bool setNonBlock(int fileDescriptor)
|
|
{
|
|
int returnValue = -1;
|
|
|
|
int flags = fcntl(fileDescriptor, F_GETFL, 0);
|
|
while ((returnValue = fcntl(fileDescriptor, F_SETFL, flags | O_NONBLOCK)) == -1 && errno == EINTR) { }
|
|
|
|
return returnValue != -1;
|
|
}
|
|
|
|
} // namespace WTF
|