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Patch from Andrew Flegg:
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.
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0246222351
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19
init/init.c
19
init/init.c
@ -847,7 +847,14 @@ static void new_init_action(int action, char *command, const char *cons)
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}
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/* Append to the end of the list */
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for (a = init_action_list; a && a->next; a = a->next);
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for (a = init_action_list; a && a->next; a = a->next) {
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/* don't enter action if it's already in the list */
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if ((strcmp(a->command, command) == 0) &&
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(strcmp(a->terminal, cons) ==0)) {
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free(new_action);
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return;
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}
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}
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if (a) {
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a->next = new_action;
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} else {
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@ -1022,6 +1029,13 @@ static void parse_inittab(void)
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#endif /* CONFIG_FEATURE_USE_INITTAB */
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}
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static void reload_signal(int sig)
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{
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message(LOG, "Reloading /etc/inittab");
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parse_inittab();
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run_actions(RESPAWN);
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return;
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}
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extern int init_main(int argc, char **argv)
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{
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@ -1120,6 +1134,9 @@ extern int init_main(int argc, char **argv)
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loop_forever();
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}
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/* Redefine SIGHUP to reread /etc/inittab */
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signal(SIGHUP, reload_signal);
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/* Now run the looping stuff for the rest of forever */
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while (1) {
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/* run the respawn stuff */
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