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Handle SIGINT and SIGTERM for PID 1

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Signed-off-by: Mark Beckwith <wythe@intrig.com>
This commit is contained in:
Mark Beckwith
2018-12-19 17:15:31 -06:00
committed by Christian Decker
parent 9ca07728ad
commit bcde9675e4
1 changed files with 34 additions and 0 deletions
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34
lightningd/lightningd.c
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@@ -574,6 +574,38 @@ void notify_new_block(struct lightningd *ld, u32 block_height)
channel_notify_new_block(ld, block_height);
}
static void on_sigint(int _ UNUSED)
{
static const char *msg = "lightningd: SIGINT caught, exiting.\n";
write(STDERR_FILENO, msg, strlen(msg));
_exit(1);
}
static void on_sigterm(int _ UNUSED)
{
static const char *msg = "lightningd: SIGTERM caught, exiting.\n";
write(STDERR_FILENO, msg, strlen(msg));
_exit(1);
}
/*~ We only need to handle SIGTERM and SIGINT for the case we are PID 1 of
* docker container since Linux makes special this PID and requires that
* some handler exist. */
static void setup_sig_handlers(void)
{
struct sigaction sigint, sigterm;
memset(&sigint, 0, sizeof(struct sigaction));
memset(&sigterm, 0, sizeof(struct sigaction));
sigint.sa_handler = on_sigint;
sigterm.sa_handler = on_sigterm;
if (1 == getpid()) {
sigaction(SIGINT, &sigint, NULL);
sigaction(SIGTERM, &sigterm, NULL);
}
}
int main(int argc, char *argv[])
{
struct lightningd *ld;
@@ -583,6 +615,8 @@ int main(int argc, char *argv[])
/*~ What happens in strange locales should stay there. */
setup_locale();
setup_sig_handlers();
/*~ This checks that the system-installed libraries (usually
* dynamically linked) actually are compatible with the ones we
* compiled with.