mirror/freebsd
1
0
Fork 0
mirror of https://git.FreeBSD.org/src.git synced 2024-12-15 10:17:20 +00:00
Code Issues Releases Activity

Add sysctl 'machdep.msgbuf_clear'. Setting it to anything causes the

Browse Source 
kernel message buffer to be cleared. It comes handy in situations when
the only logging facility you have is the msgbuf.

Reviewed by:	jkh
This commit is contained in:
Andrzej Bialecki 1998-09-29 11:20:16 +00:00
parent 8814fd974a
commit dede34d355
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=39760
2 changed files with 50 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
sys/amd64/amd64/machdep.c
View File

@ -35,7 +35,7 @@
* SUCH DAMAGE.
*
* from: @(#)machdep.c 7.4 (Berkeley) 6/3/91
* $Id: machdep.c,v 1.309 1998/09/14 22:43:32 jdp Exp $
* $Id: machdep.c,v 1.310 1998/09/25 17:34:48 peter Exp $
*/
#include "apm.h"
@ -207,8 +207,8 @@ sysctl_machdep_msgbuf SYSCTL_HANDLER_ARGS
{
int error;
/* Unwind the buffer, so that is linear (possibly starting with
* some initial nulls.
/* Unwind the buffer, so that it's linear (possibly starting with
* some initial nulls).
*/
error=sysctl_handle_opaque(oidp,msgbufp->msg_ptr+msgbufp->msg_bufr,
msgbufp->msg_size-msgbufp->msg_bufr,req);
@ -221,7 +221,28 @@ sysctl_machdep_msgbuf SYSCTL_HANDLER_ARGS
}
SYSCTL_PROC(_machdep, OID_AUTO, msgbuf, CTLTYPE_STRING|CTLFLAG_RD,
0, 0, sysctl_machdep_msgbuf, "A","");
0, 0, sysctl_machdep_msgbuf, "A","Contents of kernel message buffer");
static int msgbuf_clear;
static int
sysctl_machdep_msgbuf_clear SYSCTL_HANDLER_ARGS
{
int error;
error = sysctl_handle_int(oidp, oidp->oid_arg1, oidp->oid_arg2,
req);
if (!error && req->newptr) {
/* Clear the buffer and reset write pointer */
bzero(msgbufp->msg_ptr,msgbufp->msg_size);
msgbufp->msg_bufr=msgbufp->msg_bufx=0;
msgbuf_clear=0;
}
return (error);
}
SYSCTL_PROC(_machdep, OID_AUTO, msgbuf_clear, CTLTYPE_INT|CTLFLAG_RW,
&msgbuf_clear, 0, sysctl_machdep_msgbuf_clear, "I",
"Clear kernel message buffer");
int bootverbose = 0, Maxmem = 0;
long dumplo;

29
sys/i386/i386/machdep.c
View File

@ -35,7 +35,7 @@
* SUCH DAMAGE.
*
* from: @(#)machdep.c 7.4 (Berkeley) 6/3/91
* $Id: machdep.c,v 1.309 1998/09/14 22:43:32 jdp Exp $
* $Id: machdep.c,v 1.310 1998/09/25 17:34:48 peter Exp $
*/
#include "apm.h"
@ -207,8 +207,8 @@ sysctl_machdep_msgbuf SYSCTL_HANDLER_ARGS
{
int error;
/* Unwind the buffer, so that is linear (possibly starting with
* some initial nulls.
/* Unwind the buffer, so that it's linear (possibly starting with
* some initial nulls).
*/
error=sysctl_handle_opaque(oidp,msgbufp->msg_ptr+msgbufp->msg_bufr,
msgbufp->msg_size-msgbufp->msg_bufr,req);
@ -221,7 +221,28 @@ sysctl_machdep_msgbuf SYSCTL_HANDLER_ARGS
}
SYSCTL_PROC(_machdep, OID_AUTO, msgbuf, CTLTYPE_STRING|CTLFLAG_RD,
0, 0, sysctl_machdep_msgbuf, "A","");
0, 0, sysctl_machdep_msgbuf, "A","Contents of kernel message buffer");
static int msgbuf_clear;
static int
sysctl_machdep_msgbuf_clear SYSCTL_HANDLER_ARGS
{
int error;
error = sysctl_handle_int(oidp, oidp->oid_arg1, oidp->oid_arg2,
req);
if (!error && req->newptr) {
/* Clear the buffer and reset write pointer */
bzero(msgbufp->msg_ptr,msgbufp->msg_size);
msgbufp->msg_bufr=msgbufp->msg_bufx=0;
msgbuf_clear=0;
}
return (error);
}
SYSCTL_PROC(_machdep, OID_AUTO, msgbuf_clear, CTLTYPE_INT|CTLFLAG_RW,
&msgbuf_clear, 0, sysctl_machdep_msgbuf_clear, "I",
"Clear kernel message buffer");
int bootverbose = 0, Maxmem = 0;
long dumplo;