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Simplify even more to make it clear how the status is set.

This commit is contained in:
christos 2016-04-05 14:07:31 +00:00
parent 30e54fbe0a
commit 0fe87e3916
1 changed files with 8 additions and 9 deletions
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17
sys/kern/kern_exit.c
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@ -1,4 +1,4 @@
/* $NetBSD: kern_exit.c,v 1.254 2016/04/05 13:01:46 christos Exp $ */
/* $NetBSD: kern_exit.c,v 1.255 2016/04/05 14:07:31 christos Exp $ */
/*-
* Copyright (c) 1998, 1999, 2006, 2007, 2008 The NetBSD Foundation, Inc.
@ -67,7 +67,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: kern_exit.c,v 1.254 2016/04/05 13:01:46 christos Exp $");
__KERNEL_RCSID(0, "$NetBSD: kern_exit.c,v 1.255 2016/04/05 14:07:31 christos Exp $");
#include "opt_ktrace.h"
#include "opt_dtrace.h"
@ -119,7 +119,7 @@ int debug_exit = 0;
#endif
static int find_stopped_child(struct proc *, idtype_t, id_t, int,
struct proc **, int *, struct wrusage *, siginfo_t *);
struct proc **, struct wrusage *, siginfo_t *);
static void proc_free(struct proc *, struct wrusage *);
/*
@ -665,7 +665,7 @@ do_sys_waitid(idtype_t idtype, id_t id, int *pid, int *status, int options,
memset(si, 0, sizeof(*si));
mutex_enter(proc_lock);
error = find_stopped_child(curproc, idtype, id, options, &child, status,
error = find_stopped_child(curproc, idtype, id, options, &child,
wru, si);
if (child == NULL) {
mutex_exit(proc_lock);
@ -675,6 +675,8 @@ do_sys_waitid(idtype_t idtype, id_t id, int *pid, int *status, int options,
*pid = child->p_pid;
if (child->p_stat == SZOMB) {
/* Child is exiting */
*status = P_WAITSTATUS(child);
/* proc_free() will release the proc_lock. */
if (options & WNOWAIT) {
mutex_exit(proc_lock);
@ -683,8 +685,8 @@ do_sys_waitid(idtype_t idtype, id_t id, int *pid, int *status, int options,
}
} else {
/* Child state must have been SSTOP. */
*status = W_STOPCODE(child->p_xsig);
mutex_exit(proc_lock);
*status = W_STOPCODE(*status);
}
return 0;
}
@ -918,7 +920,7 @@ match_process(struct proc *pp, struct proc **q, idtype_t idtype, id_t id,
*/
static int
find_stopped_child(struct proc *parent, idtype_t idtype, id_t id, int options,
struct proc **child_p, int *status_p, struct wrusage *wru, siginfo_t *si)
struct proc **child_p, struct wrusage *wru, siginfo_t *si)
{
struct proc *child, *dead;
int error;
@ -1034,9 +1036,6 @@ find_stopped_child(struct proc *parent, idtype_t idtype, id_t id, int options,
if (child != NULL || error != 0 ||
((options & WNOHANG) != 0 && dead == NULL)) {
if (child != NULL) {
*status_p = P_WAITSTATUS(child);
}
*child_p = child;
return error;
}