xref: /illumos-gate/usr/src/ucbhead/sys/wait.h (revision 8c0b080c)

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 1997 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*	Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T	*/
/*	  All Rights Reserved  	*/

/*
 * Portions of this source code were derived from Berkeley 4.3 BSD
 * under license from the Regents of the University of California.
 */

#ifndef _SYS_WAIT_H
#define	_SYS_WAIT_H

#include <sys/isa_defs.h>
#include <sys/resource.h>

#ifdef __cplusplus
extern "C" {
#endif

/*
 * This wait.h is a combination of SunOS's wait.h and SysV wait.h
 * The structure 'union wait' is taken from SunOS, while the
 * rest of the #define's are from SysV.
 */

/*
 * 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 {
#if defined(_BIT_FIELDS_LTOH)
		unsigned short	w_Termsig:7;	/* termination signal */
		unsigned short	w_Coredump:1;	/* core dump indicator */
		unsigned short	w_Retcode:8;	/* exit code if w_termsig==0 */
#else
		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 */
#endif
	} w_T;
	/*
	 * Stopped process status.  Returned
	 * only for traced children unless requested
	 * with the WUNTRACED option bit.
	 */
	struct {
#if defined(_BIT_FIELDS_LTOH)
		unsigned short	w_Stopval:8;	/* == W_STOPPED if stopped */
		unsigned short	w_Stopsig:8;	/* signal that stopped us */
#else
		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 */
#endif
	} 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

/* ----- begin SysV wait.h ----- */

#include <sys/types.h>
#ifdef	BUS_OBJERR	/* Namespace conflict */
#undef	BUS_OBJERR
#endif
#include <sys/siginfo.h>
#include <sys/procset.h>

/*
 * arguments to wait functions
 */

#define	WEXITED		0001	/* wait for processes that have exite	*/
#define	WTRAPPED	0002	/* wait for processes stopped while tracing */
#define	N_WSTOPPED	0004	/* wait for processes stopped by signals */
#define	WCONTINUED	0010	/* wait for processes continued */

#define	WUNTRACED	N_WSTOPPED /* for POSIX */

#define	WNOHANG		0100	/* non blocking form of wait	*/
#define	WNOWAIT		0200	/* non destructive form of wait */

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

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

#define	WSTOPFLG		0177
#define	WSTOPPED		WSTOPFLG
				/* This is for source compatibility w/ SunOS */
#define	WCONTFLG		0177777
#define	WCOREFLG		0200
#define	WSIGMASK		0177

#define	WLOBYTE(stat)		((int)((stat)&0377))
#define	WHIBYTE(stat)		((int)(((stat)>>8)&0377))
#define	WWORD(stat)		((int)((stat))&0177777)

#define	WIFEXITED(stat)		(WLOBYTE(stat) == 0)
#define	WIFSIGNALED(stat)	(WLOBYTE(stat) > 0 && WHIBYTE(stat) == 0)
#define	WIFSTOPPED(stat)	(WLOBYTE(stat) == WSTOPFLG&&WHIBYTE(stat) != 0)
#define	WIFCONTINUED(stat)	(WWORD(stat) == WCONTFLG)

#define	WEXITSTATUS(stat)	WHIBYTE(stat)
#define	WTERMSIG(stat)		(WLOBYTE(stat)&WSIGMASK)
#define	WSTOPSIG(stat)		WHIBYTE(stat)
#define	WCOREDUMP(stat)		((stat)&WCOREFLG)



#if !defined(_KERNEL)
#if defined(__STDC__)

extern pid_t wait(int *);
extern pid_t waitpid(pid_t, int *, int);
extern int waitid(idtype_t, id_t, siginfo_t *, int);
extern pid_t wait4(pid_t, int *, int, struct rusage *);
extern pid_t wait3(int *, int, struct rusage *);

#else

extern pid_t wait();
extern pid_t waitpid();
extern int waitid();

#endif	/* __STDC__ */
#endif	/* _KERNEL */

#ifdef __cplusplus
}
#endif

#endif	/* _SYS_WAIT_H */