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Add new sysctl "kern.ttys" which return all the struct tty's which have

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been registered with ttyregister().

register ptys with ttyregister().
This commit is contained in:
Poul-Henning Kamp 1999-08-08 19:47:32 +00:00
parent 1bc52887fd
commit 08add33166
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=49540
3 changed files with 38 additions and 3 deletions
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34
sys/kern/tty.c
View file

@ -36,7 +36,7 @@
* SUCH DAMAGE.
*
* @(#)tty.c 8.8 (Berkeley) 1/21/94
* $Id: tty.c,v 1.118 1999/05/08 06:39:42 phk Exp $
* $Id: tty.c,v 1.119 1999/05/22 20:10:31 dt Exp $
*/
/*-
@ -94,6 +94,7 @@
#if NSNP > 0
#include <sys/snoop.h>
#endif
#include <sys/sysctl.h>
#include <vm/vm.h>
#include <sys/lock.h>
@ -194,6 +195,11 @@ static u_char const char_type[] = {
#undef MAX_INPUT /* XXX wrong in <sys/syslimits.h> */
#define MAX_INPUT TTYHOG /* XXX limit is usually larger for !ICANON */
/*
* list of struct tty where pstat(8) can pick it up with sysctl
*/
static SLIST_HEAD(, tty) tty_list;
/*
* Initial open of tty, or (re)entry to standard tty line discipline.
*/
@ -2433,3 +2439,29 @@ ttyfree(tp)
free(tp, M_TTYS);
}
#endif /* 0 */
void
ttyregister(tp)
struct tty *tp;
{
SLIST_INSERT_HEAD(&tty_list, tp, t_list);
}
static int
sysctl_kern_ttys SYSCTL_HANDLER_ARGS
{
int error;
struct tty *tp, t;
SLIST_FOREACH(tp, &tty_list, t_list) {
t = *tp;
if (t.t_dev)
t.t_dev = (dev_t)dev2udev(t.t_dev);
error = SYSCTL_OUT(req, (caddr_t)&t, sizeof(t));
if (error)
return (error);
}
return (0);
}
SYSCTL_PROC(_kern, OID_AUTO, ttys, CTLTYPE_OPAQUE|CTLFLAG_RD,
0, 0, sysctl_kern_ttys, "S,tty", "All struct ttys");

3
sys/kern/tty_pty.c
View file

@ -31,7 +31,7 @@
* SUCH DAMAGE.
*
* @(#)tty_pty.c 8.4 (Berkeley) 2/20/95
* $Id: tty_pty.c,v 1.61 1999/05/31 11:27:38 phk Exp $
* $Id: tty_pty.c,v 1.62 1999/08/08 19:28:50 phk Exp $
*/
/*
@ -167,6 +167,7 @@ ptyinit(n)
bzero(pt, sizeof(*pt));
devs->si_drv1 = devc->si_drv1 = pt;
devs->si_tty_tty = devc->si_tty_tty = &pt->pt_tty;
ttyregister(&pt->pt_tty);
}
/*ARGSUSED*/

4
sys/sys/tty.h
View file

@ -36,7 +36,7 @@
* SUCH DAMAGE.
*
* @(#)tty.h 8.6 (Berkeley) 1/21/94
* $Id: tty.h,v 1.43 1998/11/11 10:04:13 truckman Exp $
* $Id: tty.h,v 1.44 1998/11/11 10:56:07 truckman Exp $
*/
#ifndef _SYS_TTY_H_
@ -101,6 +101,7 @@ struct tty {
int t_olowat; /* Low water mark for output. */
speed_t t_ospeedwat; /* t_ospeed override for watermarks. */
int t_gen; /* Generation number. */
SLIST_ENTRY(tty) t_list; /* Global chain of ttys for pstat(8) */
};
#define t_cc t_termios.c_cc
@ -263,6 +264,7 @@ int ttyinput __P((int c, struct tty *tp));
int ttylclose __P((struct tty *tp, int flag));
int ttymodem __P((struct tty *tp, int flag));
int ttyopen __P((dev_t device, struct tty *tp));
void ttyregister __P((struct tty *tp));
int ttysleep __P((struct tty *tp,
void *chan, int pri, char *wmesg, int timeout));
int ttywait __P((struct tty *tp));