/******************************************************************************
 * Copyright (c) 2015 Parrot S.A.
 *
 * 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.
 *   * Neither the name of the Parrot Company nor the
 *     names of its contributors may be used to endorse or promote products
 *     derived from this software without specific prior written permission.
 *
 * 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 PARROT COMPANY 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
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * @file fdutils.h
 *
 * @brief fd utility function
 *
 *****************************************************************************/

#ifndef _FD_UTILS_H_
#define _FD_UTILS_H_

#ifdef __cplusplus
extern "C" {
#endif

/**
 * add fd O_CLOEXEC flag in fd
 *
 * @param fd file descriptor
 * @return 0 on success negative errno on error
 */
int fd_set_close_on_exec(int fd);

/**
 * check if fd has O_CLOEXEC flag
 *
 * @param fd file descriptor
 * @return 1 if fd has O_CLOEXEC, 0 otherwise
 */
int fd_has_close_on_exec(int fd);

/**
 * add flags to existing fd flags
 *
 * @param fd file descriptor
 * @return flags to be added
 * @return 0 on success negative errno on error
 */
int fd_add_flags(int fd, int flags);

#ifdef __cplusplus
}
#endif

#endif /*_FD_UTILS_H_ */