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Temporary hack to restrict open to root or the 

same UID as the session attached to /dev/kd
This commit is contained in:
gwr 1995-10-08 23:40:42 +00:00
parent 3aa94e17f0
commit 13fa3c4fe6
2 changed files with 47 additions and 7 deletions
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33
sys/arch/sun3/dev/kbd.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: kbd.c,v 1.10 1995/05/24 20:51:31 gwr Exp $ */
/* $NetBSD: kbd.c,v 1.11 1995/10/08 23:40:42 gwr Exp $ */
/*
* Copyright (c) 1992, 1993
@ -322,8 +322,13 @@ kbd_iopen()
error = tsleep((caddr_t)k, PZERO | PCATCH,
devopn, hz);
if (error == EWOULDBLOCK) { /* no response */
printf("keyboard not responding\n");
error = EIO;
log(LOG_ERR, "keyboard reset failed\n");
/*
* Allow the open anyway (to keep getty happy)
* but assume the "least common denominator".
*/
k->k_state.kbd_id = KB_SUN2;
error = 0;
}
if (error == 0)
@ -466,11 +471,9 @@ kbd_rint(register int c)
/*
* Reset keyboard after serial port overrun, so we can resynch.
* The printf below should be shortened and/or replaced with a
* call to log() after this is tested (and how will we test it?!).
*/
if (c & (TTY_FE|TTY_PE)) {
printf("keyboard input parity or framing error (0x%x)\n", c);
log(LOG_ERR, "keyboard input error (0x%x)\n", c);
(void) ttyoutput(KBD_CMD_RESET, k->k_kbd);
(*k->k_kbd->t_oproc)(k->k_kbd);
return;
@ -540,6 +543,24 @@ kbdopen(dev_t dev, int flags, int mode, struct proc *p)
{
int error;
#if 1 /* XXX - temporary hack */
/* XXX - Should make login chown devices in /etc/fbtab */
/* Require root or same UID as the kd session leader. */
if (p->p_ucred->cr_uid) {
struct tty *kd_tp;
struct proc *kd_p;
extern struct tty *kdtty();
/* Make sure kd is attached and open. */
kd_tp = kdtty(0);
if ((kd_tp == NULL) || (kd_tp->t_session == NULL))
return (EPERM);
kd_p = kd_tp->t_session->s_leader;
if (p->p_ucred->cr_uid != kd_p->p_ucred->cr_uid)
return (EACCES);
}
#endif
/* Exclusive open required for /dev/kbd */
if (kbd_softc.k_events.ev_io)
return (EBUSY);

21
sys/arch/sun3/dev/ms.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: ms.c,v 1.5 1995/03/10 01:57:02 gwr Exp $ */
/* $NetBSD: ms.c,v 1.6 1995/10/08 23:40:44 gwr Exp $ */
/*
* Copyright (c) 1992, 1993
@ -243,6 +243,25 @@ msopen(dev, flags, mode, p)
int s, error;
struct tty *tp;
#if 1 /* XXX - temporary hack */
/* XXX - Should make login chown devices in /etc/fbtab */
/* Require root or same UID as the kd session leader. */
if (p->p_ucred->cr_uid) {
struct tty *kd_tp;
struct proc *kd_p;
extern struct tty *kdtty();
/* Make sure kd is attached and open. */
kd_tp = kdtty(0);
if ((kd_tp == NULL) || (kd_tp->t_session == NULL))
return (EPERM);
kd_p = kd_tp->t_session->s_leader;
if (p->p_ucred->cr_uid != kd_p->p_ucred->cr_uid)
return (EACCES);
}
#endif
/* This is an exclusive open device. */
if (ms_softc.ms_events.ev_io)
return (EBUSY);
ms_softc.ms_events.ev_io = p;