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Bring in my changes from the 1.1 init.bsdi which causes a reboot (was a

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halt before)  if init is sent an interrupt signal.  This is necessary
for <CTL><ALT><DEL> to do the right thing if enabled.
This commit is contained in:
Nate Williams 1994-08-27 21:32:01 +00:00
parent 3b281f5345
commit e460cfd33f
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=2323
2 changed files with 24 additions and 2 deletions
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9
sbin/init/init.8
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@ -229,6 +229,15 @@ This hook is used by
and
.Xr halt 8 .
.Pp
.Nm Init
will terminate all possible processes (again, it will not wait
for deadlocked processes) and reboot the machine if sent the interrupt
.Pq Dv INT
signal, i.e.
.Dq Li "kill \-INT 1".
This is useful for shutting the machine down cleanly from inside the kernel
or from X when the machines appears to be hung.
.Pp
The role of
.Nm init
is so critical that if it dies, the system will reboot itself

17
sbin/init/init.c
View File

@ -59,6 +59,7 @@ static char sccsid[] = "@(#)init.c 8.1 (Berkeley) 7/15/93";
#include <time.h>
#include <ttyent.h>
#include <unistd.h>
#include <sys/reboot.h>
#ifdef __STDC__
#include <stdarg.h>
@ -114,6 +115,7 @@ state_func_t catatonia __P((void));
state_func_t death __P((void));
enum { AUTOBOOT, FASTBOOT } runcom_mode = AUTOBOOT;
int reboot = FALSE;
void transition __P((state_t));
state_t requested_transition = runcom;
@ -229,11 +231,11 @@ main(argc, argv)
handle(badsys, SIGSYS, 0);
handle(disaster, SIGABRT, SIGFPE, SIGILL, SIGSEGV,
SIGBUS, SIGXCPU, SIGXFSZ, 0);
handle(transition_handler, SIGHUP, SIGTERM, SIGTSTP, 0);
handle(transition_handler, SIGHUP, SIGINT, SIGTERM, SIGTSTP, 0);
handle(alrm_handler, SIGALRM, 0);
sigfillset(&mask);
delset(&mask, SIGABRT, SIGFPE, SIGILL, SIGSEGV, SIGBUS, SIGSYS,
SIGXCPU, SIGXFSZ, SIGHUP, SIGTERM, SIGTSTP, SIGALRM, 0);
SIGXCPU, SIGXFSZ, SIGHUP, SIGINT, SIGTERM, SIGTSTP, SIGALRM, 0);
sigprocmask(SIG_SETMASK, &mask, (sigset_t *) 0);
sigemptyset(&sa.sa_mask);
sa.sa_flags = 0;
@ -560,6 +562,15 @@ single_user()
if (getsecuritylevel() > 0)
setsecuritylevel(0);
if (reboot) {
/* Instead of going single user, let's halt the machine */
sync();
alarm(2);
pause();
reboot(RB_AUTOBOOT);
_exit(0);
}
if ((pid = fork()) == 0) {
/*
* Start the single user session.
@ -1129,6 +1140,8 @@ transition_handler(sig)
case SIGHUP:
requested_transition = clean_ttys;
break;
case SIGINT:
reboot = TRUE;
case SIGTERM:
requested_transition = death;
break;