From c18a1d19dbf66c85a4e9086dec012721f8080d46 Mon Sep 17 00:00:00 2001 From: andersen Date: Fri, 8 Oct 2004 08:21:54 +0000 Subject: Hiroshi Ito writes: Hello, all. Busybox init does not handle removed inittab entry correctly. # I'm sorry about my poor english, but you can find # what I would like to say from patch, isn't it? even if you apply this path, when yoy try to change a command line option in inittab, you have to do following steps. 1. remove old line from initrd 2. send HUP signal to init 3. kill old proces which is invoked from init. 4. append new line to inittab 5. send HUP signal to init, again patch is against current CVS + last patch witch I send it last. git-svn-id: svn://busybox.net/trunk/busybox@9327 69ca8d6d-28ef-0310-b511-8ec308f3f277 --- init/init.c | 36 +++++++++++++++++++++++++++++++----- 1 file changed, 31 insertions(+), 5 deletions(-) (limited to 'init') diff --git a/init/init.c b/init/init.c index 8a63ff350..0c8dc89dc 100644 --- a/init/init.c +++ b/init/init.c @@ -865,9 +865,11 @@ static void new_init_action(int action, const char *command, const char *cons) /* Append to the end of the list */ for (a = last = init_action_list; a; a = a->next) { - /* don't enter action if it's already in the list */ + /* don't enter action if it's already in the list, + * but do overwrite existing actions */ if ((strcmp(a->command, command) == 0) && (strcmp(a->terminal, cons) ==0)) { + a->action = action; free(new_action); return; } @@ -1047,14 +1049,33 @@ static void parse_inittab(void) #endif /* CONFIG_FEATURE_USE_INITTAB */ } +#ifdef CONFIG_FEATURE_USE_INITTAB static void reload_signal(int sig) { - message(LOG, "Reloading /etc/inittab"); - parse_inittab(); + struct init_action *a, *tmp; + + message(LOG, "Reloading /etc/inittab"); + + /* disable old entrys */ + for (a = init_action_list; a; a = a->next ) { + a->action = ONCE; + } + + parse_inittab(); + + /* remove unused entrys */ + for (a = init_action_list; a; a = tmp) { + tmp = a->next; + if (a->action & (ONCE | SYSINIT | WAIT ) && + a->pid == 0 ) { + delete_init_action(a); + } + } run_actions(RESPAWN); - return; + return; } - +#endif /* CONFIG_FEATURE_USE_INITTAB */ + extern int init_main(int argc, char **argv) { struct init_action *a; @@ -1145,8 +1166,13 @@ extern int init_main(int argc, char **argv) /* Next run anything to be run only once */ run_actions(ONCE); +#ifdef CONFIG_FEATURE_USE_INITTAB /* Redefine SIGHUP to reread /etc/inittab */ signal(SIGHUP, reload_signal); +#else + signal(SIGHUP, SIG_IGN); +#endif /* CONFIG_FEATURE_USE_INITTAB */ + /* Now run the looping stuff for the rest of forever */ while (1) { -- cgit v1.2.3-55-g6feb