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/*
* Mach Operating System
* Copyright (c) 1987 Carnegie-Mellon University
* All rights reserved. The CMU software License Agreement specifies
* the terms and conditions for use and redistribution.
*/
/*
* HISTORY
* 7-Jan-93 Mac Gillon (mgillon) at NeXT
* Integrated POSIX support
*
* 29-Apr-92 Peter King (king) at NeXT
* Made wait stucture layout be dependant on __BIG_ENDIAN__
* __LITTLE_ENDIAN__ predefines.
*
* 27-Sep-89 Morris Meyer (mmeyer) at NeXT
* NFS 4.0 Changes: define arguments to wait4() system call.
*
* 06-Jan-88 Jay Kistler (jjk) at Carnegie Mellon University
* Made file reentrant. Added declarations for __STDC__.
*
* 14-Dec-86 Avadis Tevanian (avie) at Carnegie-Mellon University
* Merged romp and 68000 definitions since they were the same.
* The real conditional should be dependent on byte ordering.
*
* 30-May-86 Jonathan J. Chew (jjc) at Carnegie-Mellon University
* Added 68000 dependent definitions of w_t and w_S very similar to
* those for the ROMP.
*
* 19-Feb-86 Bill Bolosky (bolosky) at Carnegie-Mellon University
* Added alternate definitions of w_T and w_S for Sailboat under
* switch ROMP.
*/
/*
* 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.
*
* @(#)wait.h 7.1 (Berkeley) 6/4/86
*/
#ifndef _WAIT_
#define _WAIT_ 1
#if !defined(KERNEL)
#include <standards.h>
#endif /* POSIX_KERN */
/*
* 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>).
*/
#if defined(_POSIX_SOURCE) && !defined(KERNEL)
#include <sys/types.h>
#ifdef __STDC__
extern pid_t wait(int *stat_loc);
extern pid_t waitpid(pid_t pid, int *stat_loc,
int options);
#else
extern pid_t wait();
extern pid_t waitpid();
#endif /* __STDC__ */
#define WNOHANG 01 /* dont hang in wait */
#define WUNTRACED 02 /* tell about stopped, */
/* untraced children */
/*
* Macros to interpret the argument returned by wait() and
* waitpid().
*/
/* Evaluates to nonzero if and only if status indicates
* stopped child.
*/
#define WIFSTOPPED(status) ((status) & 0100)
/* If WIFSTOPPED(status) is true, then this macro evaluates
* to the number of the signal that caused the child to stop.
* Otherwise, it evaluates to -1.
*/
#define WSTOPSIG(status) (int)(WIFSTOPPED(status) ? \
(((status) >> 8) & 0177) : -1)
/* Evaluates to nonzero if and only if status indicates
* the child terminated normally.
*/
#define WIFEXITED(status) (!((status) & 0377))
/* If WIFEXITED(status) is true, then this macro evaluates
* to the lower order 8 bits of the child's exit status.
* Otherwise, it evaluates to -1.
*/
#define WEXITSTATUS(status) (int)(WIFEXITED(status) ? \
(((status) >> 8) & 0377) : -1)
/* Evaluates to nonzero if and only if status indicates
* the child terminated abnormally.
*/
#define WIFSIGNALED(status) ( !WIFEXITED(status) && \
!WIFSTOPPED(status) )
/* If WIFSIGNALED(status) is true, then this macro evaluates
* to the number of the signal that terminated the child.
* Otherwise, it evaluates to -1.
*/
#define WTERMSIG(status) (int)(WIFSIGNALED(status) ? \
((status) & 0177) : -1)
#endif /* _POSIX_SOURCE && !KERNEL */
#if defined(_NEXT_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 {
#if __BIG_ENDIAN__
unsigned short w_PAD16;
unsigned w_Retcode:8; /* exit code if w_termsig==0 */
unsigned w_Coredump:1; /* core dump indicator */
unsigned w_Termsig:7; /* termination signal */
#else
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 */
#endif
} w_T;
/*
* Stopped process status. Returned
* only for traced children unless requested
* with the WUNTRACED option bit.
*/
struct {
#if __BIG_ENDIAN__
unsigned short w_PAD16;
unsigned w_Stopsig:8; /* signal that stopped us */
unsigned w_Stopval:8; /* == W_STOPPED if stopped */
#else
unsigned short w_Stopval:8; /* == W_STOPPED if stopped */
unsigned short w_Stopsig:8; /* signal that stopped us */
#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
#define WSTOPPED 0177 /* value of s.stopval if process is stopped */
#if !defined(_POSIX_SOURCE) || POSIX_KERN
/*
* 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) ((x).w_stopval == WSTOPPED)
#define WIFSIGNALED(x) ((x).w_stopval != WSTOPPED && (x).w_termsig != 0)
#define WIFEXITED(x) ((x).w_stopval != WSTOPPED && (x).w_termsig == 0)
#if defined(__STDC__) && !defined(KERNEL)
#import <sys/resource.h>
extern int wait(union wait *);
#endif /* __STDC__ && ! KERNEL*/
#endif /* !_POSIX_SOURCE || POSIX_KERN */
#ifndef KERNEL
#import <sys/resource.h>
#ifdef __STDC__
extern int wait3(union wait *, int,
struct rusage *);
#else
extern int wait3();
#endif /* __STDC__ */
#endif /* !KERNEL */
#endif /* _NEXT_SOURCE */
/* SUN_VFS */
#ifdef KERNEL
/*
* Arguments to wait4() system call, included here so it may
* be called by other routines in the kernel
*/
struct wait4_args {
int pid;
union wait *status;
int options;
struct rusage *rusage;
};
#endif
/* end SUN_VFS */
#endif
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