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Kernel modifications necessary to allow to follow fork()ed children.

Browse Source 
PR:		 bin/25587 (in part)
MFC after:	 3 weeks
This commit is contained in:
Matthew N. Dodd 2002-08-04 01:07:02 +00:00
parent c03bfcc871
commit 9ccba881d9
2 changed files with 11 additions and 0 deletions

10
sys/kern/kern_fork.c

@ -51,6 +51,7 @@
#include <sys/malloc.h>
#include <sys/mutex.h>
#include <sys/proc.h>
#include <sys/pioctl.h>
#include <sys/resourcevar.h>
#include <sys/syscall.h>
#include <sys/vnode.h>
@ -757,6 +758,15 @@ again:
msleep(p1, &p2->p_mtx, PWAIT, "ppwait", 0);
PROC_UNLOCK(p2);
/*
* If PF_FORK is set, the child process inherits the
* procfs ioctl flags from its parent.
*/
if (p1->p_pfsflags & PF_FORK) {
p2->p_stops = p1->p_stops;
p2->p_pfsflags = p1->p_pfsflags;
}
/*
* Return child proc pointer to parent.
*/

1
sys/sys/pioctl.h

@ -75,4 +75,5 @@ struct procfs_status {
# define PF_LINGER 0x01 /* Keep stops around after last close */
# define PF_ISUGID 0x02 /* Ignore UID/GID changes */
# define PF_FORK 0x04 /* Retain settings on fork() */
#endif