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Add to conscontrol(8) "set" and "unset" commands which modify the

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virtual console set-up.  Specifically, "conscontrol unset" will cause
printf(9) output to start going to the console again.
This commit is contained in:
Brian Feldman 2004-06-18 06:33:44 +00:00
parent 0aabef657e
commit 916d771d73
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=130676
2 changed files with 43 additions and 4 deletions
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5
sbin/conscontrol/conscontrol.8
View File

@ -89,6 +89,11 @@ the name of the directory may be omitted.
Change the state of console muting.
All console output is suppressed when console muting is
.Cm on .
.It Cm set Ar console | Cm unset
Set or unset the virtual console.
When unset, output from the system, such as the kernel
.Xr printf 9 ,
always goes out to the real main console.
.El
.Sh SEE ALSO
.Xr sio 4 ,

42
sbin/conscontrol/conscontrol.c
View File

@ -29,9 +29,12 @@ __FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <sys/sysctl.h>
#include <sys/ioctl.h>
#include <sys/ttycom.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
@ -43,10 +46,11 @@ static void __dead2
usage(void)
{
(void)fprintf(stderr, "%s\n%s\n%s\n",
(void)fprintf(stderr, "%s\n%s\n%s\n%s\n",
"usage: conscontrol [list]",
" conscontrol mute on | off",
" conscontrol add | delete console");
" conscontrol add | delete console",
" conscontrol set console | unset");
exit(1);
}
@ -148,6 +152,32 @@ consdel(char *devnam)
free(buf);
}
static void
consset(char *devnam)
{
int ttyfd, flag = 1;
ttyfd = open(devnam, O_RDONLY);
if (ttyfd == -1)
err(1, "opening %s", devnam);
if (ioctl(ttyfd, TIOCCONS, &flag) == -1)
err(1, "could not set %s as virtual console", devnam);
close(ttyfd);
}
static void
consunset(void)
{
int ttyfd, flag = 0;
ttyfd = open(DEVDIR "console", O_RDONLY);
if (ttyfd == -1)
err(1, "opening virtual console");
if (ioctl(ttyfd, TIOCCONS, &flag) == -1)
err(1, "could not unset virtual console");
close(ttyfd);
}
int
main(int argc, char **argv)
{
@ -158,14 +188,18 @@ main(int argc, char **argv)
argv += optind;
if (argc > 0 && strcmp(argv[0], "list") != 0) {
if (argc != 2)
if (argc == 1 && strcmp(argv[0], "unset") == 0)
consunset();
else if (argc != 2)
usage();
if (strcmp(argv[0], "mute") == 0)
else if (strcmp(argv[0], "mute") == 0)
consmute(argv[1]);
else if (strcmp(argv[0], "add") == 0)
consadd(argv[1]);
else if (strcmp(argv[0], "delete") == 0)
consdel(argv[1]);
else if (strcmp(argv[0], "set") == 0)
consset(argv[1]);
else
usage();
}