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A patch from Matt Kraai that adds a new 'shutdown' action to busybox init. Now

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you can specify an arbitrary behavior for 'ctrlaltdel' without that behavior
needing to be a reboot.
This commit is contained in:
Eric Andersen
2001-04-03 18:01:51 +00:00
parent 0f0c0b41ce
commit c97ec34370
9 changed files with 103 additions and 46 deletions
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23
init.c
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@ -146,7 +146,8 @@ typedef enum {
ASKFIRST,
WAIT,
ONCE,
CTRLALTDEL
CTRLALTDEL,
SHUTDOWN
} initActionEnum;
/* A mapping between "inittab" action name strings and action type codes. */
@ -162,6 +163,7 @@ static const struct initActionType actions[] = {
{"wait", WAIT},
{"once", ONCE},
{"ctrlaltdel", CTRLALTDEL},
{"shutdown", SHUTDOWN},
{0, 0}
};
@ -617,12 +619,12 @@ static void check_memory()
}
/* Run all commands to be run right before halt/reboot */
static void run_lastAction(void)
static void run_actions(initActionEnum action)
{
initAction *a, *tmp;
for (a = initActionList; a; a = tmp) {
tmp = a->nextPtr;
if (a->action == CTRLALTDEL) {
if (a->action == action) {
waitfor(a->process, a->console, FALSE);
delete_initAction(a);
}
@ -654,7 +656,7 @@ static void shutdown_system(void)
sleep(1);
/* run everything to be run at "ctrlaltdel" */
run_lastAction();
run_actions(SHUTDOWN);
sync();
if (kernelVersion > 0 && kernelVersion <= KERNEL_VERSION(2,2,11)) {
@ -696,6 +698,11 @@ static void reboot_signal(int sig)
exit(0);
}
static void ctrlaltdel_signal(int sig)
{
run_actions(CTRLALTDEL);
}
#endif /* ! DEBUG_INIT */
static void new_initAction(initActionEnum action, char *process, char *cons)
@ -767,10 +774,12 @@ static void parse_inittab(void)
if (file == NULL) {
/* No inittab file -- set up some default behavior */
#endif
/* Reboot on Ctrl-Alt-Del */
new_initAction(CTRLALTDEL, "/sbin/reboot", console);
/* Swapoff on halt/reboot */
new_initAction(CTRLALTDEL, "/sbin/swapoff -a", console);
new_initAction(SHUTDOWN, "/sbin/swapoff -a", console);
/* Umount all filesystems on halt/reboot */
new_initAction(CTRLALTDEL, "/bin/umount -a -r", console);
new_initAction(SHUTDOWN, "/bin/umount -a -r", console);
/* Askfirst shell on tty1 */
new_initAction(ASKFIRST, SHELL, console);
/* Askfirst shell on tty2 */
@ -883,7 +892,7 @@ extern int init_main(int argc, char **argv)
* clear all of these in run() */
signal(SIGUSR1, halt_signal);
signal(SIGUSR2, halt_signal);
signal(SIGINT, reboot_signal);
signal(SIGINT, ctrlaltdel_signal);
signal(SIGTERM, reboot_signal);
/* Turn off rebooting via CTL-ALT-DEL -- we get a