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Moved over my fix for vnode lossage when multiple TIOCSCTTY ioctls are

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done. This patch was extended to also include a suggested change by
Kirk McKusick which allows the control tty to be reasigned to a different
tty without losing a vnode.
This commit is contained in:
David Greenman 1994-08-18 03:53:38 +00:00
parent 3171c2b4bc
commit 605f11c8f2
1 changed files with 10 additions and 1 deletions
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11
sys/kern/vfs_vnops.c
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@ -36,7 +36,7 @@
* SUCH DAMAGE.
*
* @(#)vfs_vnops.c 8.2 (Berkeley) 1/21/94
* $Id$
* $Id: vfs_vnops.c,v 1.3 1994/08/02 07:43:33 davidg Exp $
*/
#include <sys/param.h>
@ -398,6 +398,15 @@ vn_ioctl(fp, com, data, p)
case VBLK:
error = VOP_IOCTL(vp, com, data, fp->f_flag, p->p_ucred, p);
if (error == 0 && com == TIOCSCTTY) {
/* Do nothing if reassigning same control tty */
if (p->p_session->s_ttyvp == vp)
return (0);
/* Get rid of reference to old control tty */
if (p->p_session->s_ttyvp)
vrele(p->p_session->s_ttyvp);
p->p_session->s_ttyvp = vp;
VREF(vp);
}