d/freebsd-dev
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Init(8) will halt the system if sent USR1 signal,

Browse Source 
or halt and turn the power off if sent SIGUSR2.

PR:		5451
Submitted by:	Leif Neland <leifn@image.dk>
Reworked by:	ru
Reviewed by:	-hackers
This commit is contained in:
Ruslan Ermilov 1999-06-16 20:01:19 +00:00
parent 23fc6cddce
commit a0a549c7fd
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=47962
2 changed files with 23 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
sbin/init/init.8
View File

@ -33,7 +33,7 @@
.\" SUCH DAMAGE.
.\"
.\" @(#)init.8 8.3 (Berkeley) 4/18/94
.\" $Id: init.8,v 1.12 1998/07/06 06:56:07 charnier Exp $
.\" $Id: init.8,v 1.13 1998/12/16 16:50:12 ghelmer Exp $
.\"
.Dd April 18, 1994
.Dt INIT 8
@ -252,6 +252,14 @@ signal, i.e.
This is useful for shutting the machine down cleanly from inside the kernel
or from X when the machine appears to be hung.
.Pp
.Nm Init
will do the same, except it will shutdown the machine if sent
the user defined signal 1
.Pq Dv USR1 ,
or will shutdown and turn the power off (if hardware permits) if sent
the user defined signal 2
.Pq Dv USR2 .
.Pp
When shutting down the machine,
.Nm
will try to run the
@ -286,7 +294,7 @@ that is stuck in a device driver because of
a persistent device error condition.
.El
.Sh FILES
.Bl -tag -width /var/log/wtmp -compact
.Bl -tag -width /etc/rc.shutdown -compact
.It Pa /dev/console
system console device
.It Pa /dev/tty*
@ -318,7 +326,7 @@ system shutdown commands
.Xr shutdown 8 ,
.Xr sysctl 8
.Sh HISTORY
A
An
.Nm
command appeared in
.At v6 .

17
sbin/init/init.c
View File

@ -45,7 +45,7 @@ static const char copyright[] =
static char sccsid[] = "@(#)init.c 8.1 (Berkeley) 7/15/93";
#endif
static const char rcsid[] =
"$Id: init.c,v 1.30 1998/07/06 06:56:08 charnier Exp $";
"$Id: init.c,v 1.31 1998/07/22 05:45:11 phk Exp $";
#endif /* not lint */
#include <sys/param.h>
@ -132,6 +132,7 @@ enum { AUTOBOOT, FASTBOOT } runcom_mode = AUTOBOOT;
#define TRUE 1
int Reboot = FALSE;
int howto = RB_AUTOBOOT;
int devfs;
@ -259,11 +260,13 @@ main(argc, argv)
handle(badsys, SIGSYS, 0);
handle(disaster, SIGABRT, SIGFPE, SIGILL, SIGSEGV,
SIGBUS, SIGXCPU, SIGXFSZ, 0);
handle(transition_handler, SIGHUP, SIGINT, SIGTERM, SIGTSTP, 0);
handle(transition_handler, SIGHUP, SIGINT, SIGTERM, SIGTSTP,
SIGUSR1, SIGUSR2, 0);
handle(alrm_handler, SIGALRM, 0);
sigfillset(&mask);
delset(&mask, SIGABRT, SIGFPE, SIGILL, SIGSEGV, SIGBUS, SIGSYS,
SIGXCPU, SIGXFSZ, SIGHUP, SIGINT, SIGTERM, SIGTSTP, SIGALRM, 0);
SIGXCPU, SIGXFSZ, SIGHUP, SIGINT, SIGTERM, SIGTSTP, SIGALRM,
SIGUSR1, SIGUSR2, 0);
sigprocmask(SIG_SETMASK, &mask, (sigset_t *) 0);
sigemptyset(&sa.sa_mask);
sa.sa_flags = 0;
@ -594,11 +597,11 @@ single_user()
setsecuritylevel(0);
if (Reboot) {
/* Instead of going single user, let's halt the machine */
/* Instead of going single user, let's reboot the machine */
sync();
alarm(2);
pause();
reboot(RB_AUTOBOOT);
reboot(howto);
_exit(0);
}
@ -1238,6 +1241,10 @@ transition_handler(sig)
case SIGHUP:
requested_transition = clean_ttys;
break;
case SIGUSR2:
howto = RB_POWEROFF;
case SIGUSR1:
howto |= RB_HALT;
case SIGINT:
Reboot = TRUE;
case SIGTERM: