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Ensure that the pgid arg to TIOCSPGRP is in the current session.

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Correctly treat a +ve value as a pgid and a -ve one as a pid.
This commit is contained in:
dsl 2003-03-13 10:20:06 +00:00
parent 53d2320e25
commit a485005f79
1 changed files with 16 additions and 8 deletions
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24
sys/kern/subr_log.c
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@ -1,4 +1,4 @@
/* $NetBSD: subr_log.c,v 1.25 2002/11/26 18:44:34 christos Exp $ */
/* $NetBSD: subr_log.c,v 1.26 2003/03/13 10:20:06 dsl Exp $ */
/*
* Copyright (c) 1982, 1986, 1993
@ -40,7 +40,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: subr_log.c,v 1.25 2002/11/26 18:44:34 christos Exp $");
__KERNEL_RCSID(0, "$NetBSD: subr_log.c,v 1.26 2003/03/13 10:20:06 dsl Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@ -128,7 +128,7 @@ logopen(dev, flags, mode, p)
if (log_open)
return (EBUSY);
log_open = 1;
logsoftc.sc_pgid = p->p_pid; /* signal process only */
logsoftc.sc_pgid = -p->p_pid; /* signal process only */
/*
* The message buffer is initialized during system configuration.
* If it's been clobbered, note that and return an error. (This
@ -287,10 +287,10 @@ logwakeup()
return;
selnotify(&logsoftc.sc_selp, 0);
if (logsoftc.sc_state & LOG_ASYNC) {
if (logsoftc.sc_pgid < 0)
gsignal(-logsoftc.sc_pgid, SIGIO);
else if (logsoftc.sc_pgid > 0 &&
(p = pfind(logsoftc.sc_pgid)) != NULL)
if (logsoftc.sc_pgid > 0)
gsignal(logsoftc.sc_pgid, SIGIO);
else if (logsoftc.sc_pgid < 0 &&
(p = pfind(-logsoftc.sc_pgid)) != NULL)
psignal(p, SIGIO);
}
if (logsoftc.sc_state & LOG_RDWAIT) {
@ -310,6 +310,8 @@ logioctl(dev, com, data, flag, p)
{
long l;
int s;
pid_t pgid;
int error;
switch (com) {
@ -334,7 +336,13 @@ logioctl(dev, com, data, flag, p)
break;
case TIOCSPGRP:
logsoftc.sc_pgid = *(int *)data;
pgid = *(int *)data;
if (pgid != 0) {
error = pgid_in_session(p, pgid);
if (error)
return error;
}
logsoftc.sc_pgid = pgid;
break;
case TIOCGPGRP: