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Rewrite kern.console handling in sbuf(9). My intention is to leave

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kern.console format as is. Thus, no difference in output format should
appear after this commit.

Reviewed by:	cognet@ (mentor)
Approved by:	cognet@ (mentor)
This commit is contained in:
Wojciech A. Koszek 2007-12-25 21:17:34 +00:00
parent 35402bd00e
commit 4ffcc89aa6
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=174905
1 changed files with 17 additions and 22 deletions
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39
sys/kern/tty_cons.c
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@ -56,6 +56,7 @@ __FBSDID("$FreeBSD$");
#include <sys/queue.h>
#include <sys/reboot.h>
#include <sys/sysctl.h>
#include <sys/sbuf.h>
#include <sys/tty.h>
#include <sys/uio.h>
#include <sys/vnode.h>
@ -295,39 +296,33 @@ cnunavailable(void)
}
/*
* XXX: rewrite to use sbufs instead
* sysctl_kern_console() provides output parseable in conscontrol(1).
*/
static int
sysctl_kern_console(SYSCTL_HANDLER_ARGS)
{
struct cn_device *cnd;
struct consdev *cp, **list;
char *name, *p;
int delete, len, error;
char *p;
int delete, error;
struct sbuf *sb;
len = 2;
sb = sbuf_new(NULL, NULL, CNDEVPATHMAX * 2, SBUF_AUTOEXTEND);
if (sb == NULL)
return (ENOMEM);
sbuf_clear(sb);
STAILQ_FOREACH(cnd, &cn_devlist, cnd_next)
sbuf_printf(sb, "%s,", cnd->cnd_cn->cn_name);
sbuf_printf(sb, "/");
SET_FOREACH(list, cons_set) {
cp = *list;
if (cp->cn_name[0] != '\0')
len += strlen(cp->cn_name) + 1;
sbuf_printf(sb, "%s,", cp->cn_name);
}
STAILQ_FOREACH(cnd, &cn_devlist, cnd_next)
len += strlen(cnd->cnd_cn->cn_name) + 1;
len = len > CNDEVPATHMAX ? len : CNDEVPATHMAX;
MALLOC(name, char *, len, M_TEMP, M_WAITOK | M_ZERO);
p = name;
STAILQ_FOREACH(cnd, &cn_devlist, cnd_next)
p += sprintf(p, "%s,", cnd->cnd_cn->cn_name);
*p++ = '/';
SET_FOREACH(list, cons_set) {
cp = *list;
if (cp->cn_name[0] != '\0')
p += sprintf(p, "%s,", cp->cn_name);
}
error = sysctl_handle_string(oidp, name, len, req);
sbuf_finish(sb);
error = sysctl_handle_string(oidp, sbuf_data(sb), sbuf_len(sb), req);
if (error == 0 && req->newptr != NULL) {
p = name;
p = sbuf_data(sb);
error = ENXIO;
delete = 0;
if (*p == '-') {
@ -349,7 +344,7 @@ sysctl_kern_console(SYSCTL_HANDLER_ARGS)
break;
}
}
FREE(name, M_TEMP);
sbuf_delete(sb);
return (error);
}