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    Length: 4516 (0x11a4)
    Types: TextFile
    Notes: @(#)wait.h 13.2 (RC International) 91/03/04 */
    Names: »wait.h«

└─⟦50656ff4a⟧ Bits:30010538 TX 3.1 Coldstart
    └─⟦bbf173f5c⟧ »0004« 
        └─⟦this⟧ »./usr/include/sys/wait.h« 

TextFile

/*	@(#)wait.h	13.2 (RC International) 91/03/04	*/

/*	Copyright (c) 1984, 1986, 1987, 1988, 1989, 1990 AT&T	*/
/*	  All Rights Reserved  	*/

/*	THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF AT&T	*/
/*	The copyright notice above does not evidence any   	*/
/*	actual or intended publication of such source code.	*/

#ident	"@(-)head.sys:wait.h	1.1.5.1"

#ifndef _WAIT_H
#define _WAIT_H

/*
 * 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>).
 */

/*
 * 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_dummy1:16;    /* 2 dummy byte for big ending*/
		unsigned short	w_Retcode:8;	/* sig code if w_termsig!=0 */
						/* or high byte of exit arg */
		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_dummy2:16;    /* 2 dummy byte for big ending*/
		unsigned short	w_Stopsig:8;	/* signal that stopped us */
		unsigned short	w_Stopval:8;	/* == WSTOPPED if stopped */
	} w_S;
	/*
	 * exit value for wait
	 */
	struct {
		unsigned short  w_dummy2:16;    /* 2 dummy byte for big ending*/
		unsigned short	w_Exitval:16	/* exit value for wait */
	} w_U;
};

#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 w_xstat		w_U.w_Exitval

/*
 * Option bits for argument of wait3 and waitpid.  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 */


/*
 * arguments to wait functions
 */

#if !defined(_POSIX_SOURCE) 
#define WEXITED		0001	/* wait for processes that have exited	*/
#define WTRAPPED	0002	/* wait for processes stopped while tracing */
#define WSTOPPED	0004	/* wait for processes stopped by signals */
#define WCONTINUED	0010	/* wait for processes continued */
#endif /* !defined(_POSIX_SOURCE) */

#if !defined(_POSIX_SOURCE) 
#define WNOWAIT		0200	/* non destructive form of wait */

#define WOPTMASK	(WEXITED|WTRAPPED|WSTOPPED|WCONTINUED|WNOHANG|WNOWAIT)

/*
 * macros for stat return from wait functions
 */

#define WCONTFLG		0177777
#define WCOREFLG		0200

#define WWORD(stat)		((int)((stat))&0177777)
#endif /* !defined(_POSIX_SOURCE) */

#if !defined(_POSIX_SOURCE) 
#define WSTOPFLG		0177
#define WSIGMASK		0177
#define WLOBYTE(stat)		((int)((stat)&0377))
#define WHIBYTE(stat)		((int)(((stat)>>8)&0377))
#endif /* !defined(_POSIX_SOURCE) */ 

#define WIFEXITED(stat)		(((int)((stat)&0377))==0)
#define WIFSIGNALED(stat)	(((int)((stat)&0377))>0&&((int)(((stat)>>8)&0377))==0)
#define WIFSTOPPED(stat)	(((int)((stat)&0377))==0177&&((int)(((stat)>>8)&0377))!=0)

#if !defined(_POSIX_SOURCE) 
#define WIFCONTINUED(stat)	(WWORD(stat)==WCONTFLG)
#endif /* !defined(_POSIX_SOURCE) */

#define WEXITSTATUS(stat)	((int)(((stat)>>8)&0377))
#define WTERMSIG(stat)		(((int)((stat)&0377))&0177)
#define WSTOPSIG(stat)		((int)(((stat)>>8)&0377))

#if !defined(_POSIX_SOURCE) 
#define WCOREDUMP(stat)		((stat)&WCOREFLG)
#endif /* !defined(_POSIX_SOURCE) */


#if defined(__STDC__)

extern pid_t wait(int *);
extern pid_t waitpid(pid_t, int *, int);

#else /* Not __STDC__ */

extern pid_t wait();
extern pid_t waitpid();

#if !defined(_POSIX_SOURCE) 
extern int waitid();
#endif /* !defined(_POSIX_SOURCE) */

#endif	/* __STDC__ */

#endif /* _WAIT_H */