/****************************************************************************
* include/sys/wait.h
*
* Copyright (C) 2011 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* 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.
* 3. Neither the name NuttX 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
* 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.
*
****************************************************************************/
#ifndef __INCLUDE_SYS_WAIT_H
#define __INCLUDE_SYS_WAIT_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <sys/types.h>
#include <signal.h>
#ifdef CONFIG_SCHED_WAITPID
/****************************************************************************
* Pre-Processor Definitions
****************************************************************************/
/* The following are provided for analysis of returned status values.
* Encoded is as follows as 2 bytes of info(MS) then two bytes of code (LS).
* Code:
* 0 - Child has exited, info is the exit code.
* Other values - Not implemented
*/
#define WEXITSTATUS(s) (((s) >> 8) & 0xff)/* Return exit status */
#define WIFEXITED(s) (((s) & 0xff) == 0) /* True: Child exited normally */
#define WIFCONTINUED(s) (false) /* True: Child has been continued */
#define WIFSIGNALED(s) (false) /* True: Child exited due to uncaught signal */
#define WIFSTOPPED(s) (false) /* True: Child is currently stopped */
#define WSTOPSIG(s) (false) /* Return signal number that caused process to stop */
#define WTERMSIG(s) (false) /* Return signal number that caused process to terminate */
/* The following symbolic constants are possible values for the options
* argument to waitpi(1) (1) and/or waitid() (2),
*/
#define WCONTINUED (1 << 0) /* Status for child that has been continued (1)(2) */
#define WNOHANG (1 << 1) /* Do not wait if status not available (1) */
#define WUNTRACED (1 << 2) /* Report status of stopped child process (1) */
#define WEXITED (1 << 3) /* Wait for processes that have exited (2) */
#define WSTOPPED (1 << 4) /* Status for child stopped on signal (2) */
#define WNOHANG (1 << 5) /* Return immediately if there are no children (2) */
#define WNOWAIT (1 << 6) /* Keep the process in a waitable state (2) */
/****************************************************************************
* Public Type Definitions
****************************************************************************/
#ifndef __ASSEMBLY__
enum idtype_e
{
P_PID = 1,
P_GID = 2,
P_ALL = 3
};
typedef enum idtype_e idtype_t;
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
#undef EXTERN
#if defined(__cplusplus)
#define EXTERN extern "C"
extern "C" {
#else
#define EXTERN extern
#endif
EXTERN pid_t wait(int *stat_loc);
EXTERN int waitid(idtype_t idtype, id_t id, siginfo_t *siginfo, int options);
EXTERN pid_t waitpid(pid_t pid, int *stat_loc, int options);
#undef EXTERN
#if defined(__cplusplus)
}
#endif
#endif /* __ASSEMBLY__ */
#endif /* CONFIG_SCHED_WAITPID */
#endif /* __INCLUDE_SYS_WAIT_H */
