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authorBogdan Purcareata <bogdan.purcareata@freescale.com>2013-11-26 12:54:48 (GMT)
committer Denys Vlasenko <vda.linux@googlemail.com>2013-11-26 12:54:48 (GMT)
commit760fc6debcba8cb5ca8d8e2252fac3757c453e11 (patch)
treefde19f0e554fd9839a3cfcd2cb20385f6e77c24b
parentcffe28ef876a6fe8a8154321bf5feb409d87cf1a (diff)
downloadbusybox-760fc6debcba8cb5ca8d8e2252fac3757c453e11.tar.gz
busybox-760fc6debcba8cb5ca8d8e2252fac3757c453e11.tar.bz2
init: halt on SIGPWR too
Most init processes implement a handler for SIGPWR that gracefully stops all child processes when shutting down a machine. Some other technologies rely on this signal - e.g. Busybox powered LXC containers. This patch makes busybox init halt when receiving SIGPWR. Signed-off-by: Bogdan Purcareata <bogdan.purcareata@freescale.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
-rw-r--r--init/init.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/init/init.c b/init/init.c
index c63bba1..d29328c 100644
--- a/init/init.c
+++ b/init/init.c
@@ -789,7 +789,7 @@ static void run_shutdown_and_kill_processes(void)
* and only one will be remembered and acted upon.
*/
-/* The SIGUSR[12]/SIGTERM handler */
+/* The SIGPWR/SIGUSR[12]/SIGTERM handler */
static void halt_reboot_pwoff(int sig) NORETURN;
static void halt_reboot_pwoff(int sig)
{
@@ -1103,8 +1103,8 @@ int init_main(int argc UNUSED_PARAM, char **argv)
/* NOTE that if CONFIG_FEATURE_USE_INITTAB is NOT defined,
* then parse_inittab() simply adds in some default
- * actions(i.e., INIT_SCRIPT and a pair
- * of "askfirst" shells */
+ * actions (i.e., INIT_SCRIPT and a pair
+ * of "askfirst" shells) */
parse_inittab();
}
@@ -1135,6 +1135,7 @@ int init_main(int argc UNUSED_PARAM, char **argv)
struct sigaction sa;
bb_signals(0
+ + (1 << SIGPWR) /* halt */
+ (1 << SIGUSR1) /* halt */
+ (1 << SIGTERM) /* reboot */
+ (1 << SIGUSR2) /* poweroff */