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Patch from Andrew Flegg:

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Here's a pretty crude patch to reload /etc/inittab when init receives a
    SIGHUP. The mailing list archives weren't entirely clear on whether or
    not it should already happen, but didn't appear to be.

    The patch:
       * Adds a new function, reload_signal() which just calls
	 parse_inittab() and run_actions(RESPAWN)

       * Before entering the while (1) loop set up SIGHUP to call
	 reload_signal()

       * Modify new_init_action to skip the action if the same command
	 already exists on the same terminal

    This last bit means that changing already running entries is a bit
    hairy as you can end up with, for example, two shells running on the
    same virtual console. However, for solely adding/removing entries this patch
    seems to work quite well.
This commit is contained in:
Eric Andersen 2003-07-22 09:48:56 +00:00
parent 0246222351
commit 6fd0e31e87
1 changed files with 19 additions and 2 deletions
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21
init/init.c
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@ -847,7 +847,14 @@ static void new_init_action(int action, char *command, const char *cons)
} }
/* Append to the end of the list */ /* Append to the end of the list */
for (a = init_action_list; a && a->next; a = a->next); for (a = init_action_list; a && a->next; a = a->next) {
/* don't enter action if it's already in the list */
if ((strcmp(a->command, command) == 0) &&
(strcmp(a->terminal, cons) ==0)) {
free(new_action);
return;
}
}
if (a) { if (a) {
a->next = new_action; a->next = new_action;
} else { } else {
@ -1022,7 +1029,14 @@ static void parse_inittab(void)
#endif /* CONFIG_FEATURE_USE_INITTAB */ #endif /* CONFIG_FEATURE_USE_INITTAB */
} }
static void reload_signal(int sig)
{
message(LOG, "Reloading /etc/inittab");
parse_inittab();
run_actions(RESPAWN);
return;
}
extern int init_main(int argc, char **argv) extern int init_main(int argc, char **argv)
{ {
struct init_action *a; struct init_action *a;
@ -1120,6 +1134,9 @@ extern int init_main(int argc, char **argv)
loop_forever(); loop_forever();
} }
/* Redefine SIGHUP to reread /etc/inittab */
signal(SIGHUP, reload_signal);
/* Now run the looping stuff for the rest of forever */ /* Now run the looping stuff for the rest of forever */
while (1) { while (1) {
/* run the respawn stuff */ /* run the respawn stuff */