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/*
* Copyright (C) 2019 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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 AND CONTRIBUTORS
* "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 OWNER 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 <stdarg.h>
#include <fcntl.h>
#include "private/bionic_fdtrack.h"
#if defined(__LP64__)
extern "C" int __fcntl(int fd, int cmd, ...);
int fcntl(int fd, int cmd, ...) {
va_list args;
va_start(args, cmd);
// This is a bit sketchy, especially because arg can be an int, but all of our
// supported 64-bit ABIs pass arg in a register.
void* arg = va_arg(args, void*);
va_end(args);
int rc = __fcntl(fd, cmd, arg);
if (cmd == F_DUPFD) {
return FDTRACK_CREATE_NAME("F_DUPFD", rc);
} else if (cmd == F_DUPFD_CLOEXEC) {
return FDTRACK_CREATE_NAME("F_DUPFD_CLOEXEC", rc);
}
return rc;
}
#else
extern "C" int __fcntl64(int, int, ...);
// For fcntl we use the fcntl64 system call to signal that we're using struct flock64.
int fcntl(int fd, int cmd, ...) {
va_list ap;
va_start(ap, cmd);
void* arg = va_arg(ap, void*);
va_end(ap);
if (cmd == F_DUPFD) {
return FDTRACK_CREATE_NAME("F_DUPFD", __fcntl64(fd, cmd, arg));
} else if (cmd == F_DUPFD_CLOEXEC) {
return FDTRACK_CREATE_NAME("F_DUPFD_CLOEXEC", __fcntl64(fd, cmd, arg));
}
return __fcntl64(fd, cmd, arg);
}
#endif
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