wait.h revision 5d54f3d8999eac1762fe0a8c7177d20f1f201fae
/*
* Copyright 1989 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
* Copyright (c) 1982, 1986 Regents of the University of California.
* All rights reserved. The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*/
#ifndef __sys_wait_h
#define __sys_wait_h
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* This file holds definitions relevent to the wait system call.
* Some of the options here are available only through the ``wait3''
* entry point; the old entry point with one argument has more fixed
* semantics, never returning status of unstopped children, hanging until
* a process terminates if any are outstanding, and never returns
* detailed information about process resource utilization (<vtimes.h>).
*/
#ifndef _POSIX_SOURCE
#define __wait wait
#define w_termsig __w_termsig
#define w_coredump __w_coredump
#define w_retcode __w_retcode
#define w_stopval __w_stopval
#define w_stopsig __w_stopsig
#define WSTOPPED _WSTOPPED
#endif /* !_POSIX_SOURCE */
/*
* Structure of the information in the first word returned by both
* wait and wait3. If w_stopval==WSTOPPED, then the second structure
* describes the information returned, else the first. See WUNTRACED below.
*/
union __wait {
int w_status; /* used in syscall */
/*
* Terminated process status.
*/
struct {
unsigned short w_Fill1:16; /* high 16 bits unused */
unsigned short w_Retcode:8; /* exit code if w_termsig==0 */
unsigned short w_Coredump:1; /* core dump indicator */
unsigned short w_Termsig:7; /* termination signal */
} w_T;
/*
* Stopped process status. Returned
* only for traced children unless requested
* with the WUNTRACED option bit.
*/
struct {
unsigned short w_Fill2:16; /* high 16 bits unused */
unsigned short w_Stopsig:8; /* signal that stopped us */
unsigned short w_Stopval:8; /* == W_STOPPED if stopped */
} w_S;
};
#define __w_termsig w_T.w_Termsig
#define __w_coredump w_T.w_Coredump
#define __w_retcode w_T.w_Retcode
#define __w_stopval w_S.w_Stopval
#define __w_stopsig w_S.w_Stopsig
#define _WSTOPPED 0177 /* value of s.stopval if process is stopped */
/*
* Option bits for the second argument of wait3. WNOHANG causes the
* wait to not hang if there are no stopped or terminated processes, rather
* returning an error indication in this case (pid==0). WUNTRACED
* indicates that the caller should receive status about untraced children
* which stop due to signals. If children are stopped and a wait without
* this option is done, it is as though they were still running... nothing
* about them is returned.
*/
#define WNOHANG 1 /* dont hang in wait */
#define WUNTRACED 2 /* tell about stopped, untraced children */
#define WIFSTOPPED(x) (((union __wait*)&(x))->__w_stopval == _WSTOPPED)
#define WIFSIGNALED(x) (((union __wait*)&(x))->__w_stopval != _WSTOPPED && \
((union __wait*)&(x))->__w_termsig != 0)
#define WIFEXITED(x) (((union __wait*)&(x))->__w_stopval != _WSTOPPED && \
((union __wait*)&(x))->__w_termsig == 0)
#define WEXITSTATUS(x) (((union __wait*)&(x))->__w_retcode)
#define WTERMSIG(x) (((union __wait*)&(x))->__w_termsig)
#define WSTOPSIG(x) (((union __wait*)&(x))->__w_stopsig)
#include <sys/stdtypes.h>
pid_t wait(/* int *loc */);
pid_t waitpid(/* pid_t pid, int *loc, int opts */);
#endif /* !__sys_wait_h */