119 lines
4.6 KiB
C
119 lines
4.6 KiB
C
/****************************************************************************
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* include/sys/wait.h
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*
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* Copyright (C) 2011, 2013 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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#ifndef __INCLUDE_SYS_WAIT_H
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#define __INCLUDE_SYS_WAIT_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <sys/types.h>
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#include <signal.h>
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#ifdef CONFIG_SCHED_WAITPID
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/****************************************************************************
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* Pre-Processor Definitions
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****************************************************************************/
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/* The following are provided for analysis of returned status values.
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* Encoded is as follows as 2 bytes of info(MS) then two bytes of code (LS).
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* Code:
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* 0 - Child has exited, info is the exit code.
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* Other values - Not implemented
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*/
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#define WEXITSTATUS(s) (((s) >> 8) & 0xff)/* Return exit status */
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#define WIFEXITED(s) (((s) & 0xff) == 0) /* True: Child exited normally */
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#define WIFCONTINUED(s) (false) /* True: Child has been continued */
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#define WIFSIGNALED(s) (false) /* True: Child exited due to uncaught signal */
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#define WIFSTOPPED(s) (false) /* True: Child is currently stopped */
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#define WSTOPSIG(s) (false) /* Return signal number that caused process to stop */
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#define WTERMSIG(s) (false) /* Return signal number that caused process to terminate */
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/* The following symbolic constants are possible values for the options
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* argument to waitpid() (1) and/or waitid() (2),
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*/
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#define WCONTINUED (1 << 0) /* Status for child that has been continued (1)(2) */
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#define WNOHANG (1 << 1) /* Do not wait if status not available (1) */
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#define WUNTRACED (1 << 2) /* Report status of stopped child process (1) */
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#define WEXITED (1 << 3) /* Wait for processes that have exited (2) */
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#define WSTOPPED (1 << 4) /* Status for child stopped on signal (2) */
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#define WNOHANG (1 << 5) /* Return immediately if there are no children (2) */
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#define WNOWAIT (1 << 6) /* Keep the process in a waitable state (2) */
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/****************************************************************************
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* Public Type Definitions
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****************************************************************************/
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#ifndef __ASSEMBLY__
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enum idtype_e
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{
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P_PID = 1,
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P_GID = 2,
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P_ALL = 3
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};
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typedef enum idtype_e idtype_t;
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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#undef EXTERN
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#if defined(__cplusplus)
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#define EXTERN extern "C"
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extern "C" {
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#else
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#define EXTERN extern
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#endif
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EXTERN pid_t wait(FAR int *stat_loc);
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EXTERN int waitid(idtype_t idtype, id_t id, FAR siginfo_t *info, int options);
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EXTERN pid_t waitpid(pid_t pid, FAR int *stat_loc, int options);
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#undef EXTERN
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#if defined(__cplusplus)
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}
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#endif
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#endif /* __ASSEMBLY__ */
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#endif /* CONFIG_SCHED_WAITPID */
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#endif /* __INCLUDE_SYS_WAIT_H */
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