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/*
* 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;
}
bool unsetCloseOnExec(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
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