diff options
Diffstat (limited to 'init/init.c')
| -rw-r--r-- | init/init.c | 33 |
1 files changed, 32 insertions, 1 deletions
diff --git a/init/init.c b/init/init.c index d0beb2a9a..f6108f1e8 100644 --- a/init/init.c +++ b/init/init.c @@ -142,7 +142,8 @@ typedef enum { WAIT, ONCE, CTRLALTDEL, - SHUTDOWN + SHUTDOWN, + RESTART } initActionEnum; /* A mapping between "inittab" action name strings and action type codes. */ @@ -159,6 +160,7 @@ static const struct initActionType actions[] = { {"once", ONCE}, {"ctrlaltdel", CTRLALTDEL}, {"shutdown", SHUTDOWN}, + {"restart", RESTART}, {0, 0} }; @@ -688,6 +690,26 @@ static void shutdown_system(void) } } +static void exec_signal(int sig) +{ + initAction *a, *tmp; + for (a = initActionList; a; a = tmp) { + tmp = a->nextPtr; + if (a->action == RESTART) { + shutdown_system(); + message(CONSOLE|LOG, "Trying to re-exec %s\n", a->process); + execl(a->process, a->process, NULL); + + message(CONSOLE|LOG, "execl of %s failed: %s\n", + a->process, sys_errlist[errno]); + sync(); + sleep(2); + init_reboot(RB_HALT_SYSTEM); + loop_forever(); + } + } +} + static void halt_signal(int sig) { shutdown_system(); @@ -839,6 +861,8 @@ static void parse_inittab(void) /* Swapoff on halt/reboot */ new_initAction(SHUTDOWN, "/sbin/swapoff -a", console); #endif + /* Prepare to restart init when a HUP is received */ + new_initAction(RESTART, "/sbin/init", console); /* Askfirst shell on tty1 */ new_initAction(ASKFIRST, LOGIN_SHELL, console); /* Askfirst shell on tty2 */ @@ -937,6 +961,12 @@ extern int init_main(int argc, char **argv) pid_t wpid; int status; + + if (argc > 1 && !strcmp(argv[1], "-q")) { + kill(1, SIGHUP); + exit(0); + } + #ifndef DEBUG_INIT /* Expect to be invoked as init with PID=1 or be invoked as linuxrc */ if (getpid() != 1 @@ -949,6 +979,7 @@ extern int init_main(int argc, char **argv) } /* Set up sig handlers -- be sure to * clear all of these in run() */ + signal(SIGHUP, exec_signal); signal(SIGUSR1, halt_signal); signal(SIGUSR2, halt_signal); signal(SIGINT, ctrlaltdel_signal); |