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Handle event loop watcher failure modes

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When alibuEv event watcher callback has `UEV_ERROR` in the events mask
we must handle the error.  Unfortunately, in most cases there is not
much we can do but ignore it or log the error.

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>
This commit is contained in:
Joachim Nilsson committed 2017-11-12 11:18:12 +01:00
1 parent 168da2a5c6
commit 6826d7ee3f
4 files changed
+52 -1
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src/sig.c
+40
View File
@@ -224,6 +224,11 @@ void do_shutdown(shutop_t op)
static void sighup_cb(uev_t *w, void *arg, int events)
{
_d("...");
if (UEV_ERROR == events) {
_e("Unrecoverable error in signal watcher");
return;
}
/* INIT_CMD_RELOAD: 'init q', 'initctl reload', and SIGHUP */
service_reload_dynamic();
}
@@ -234,6 +239,11 @@ static void sighup_cb(uev_t *w, void *arg, int events)
static void sigint_cb(uev_t *w, void *arg, int events)
{
_d("...");
if (UEV_ERROR == events) {
_e("Unrecoverable error in signal watcher");
return;
}
halt = SHUT_REBOOT;
service_runlevel(6);
}
@@ -244,6 +254,11 @@ static void sigint_cb(uev_t *w, void *arg, int events)
static void sigusr1_cb(uev_t *w, void *arg, int events)
{
_d("...");
if (UEV_ERROR == events) {
_e("Unrecoverable error in signal watcher");
return;
}
halt = SHUT_HALT;
service_runlevel(0);
}
@@ -254,6 +269,11 @@ static void sigusr1_cb(uev_t *w, void *arg, int events)
static void sigusr2_cb(uev_t *w, void *arg, int events)
{
_d("...");
if (UEV_ERROR == events) {
_e("Unrecoverable error in signal watcher");
return;
}
halt = SHUT_OFF;
service_runlevel(0);
}
@@ -264,6 +284,11 @@ static void sigusr2_cb(uev_t *w, void *arg, int events)
static void sigterm_cb(uev_t *w, void *arg, int events)
{
_d("...");
if (UEV_ERROR == events) {
_e("Unrecoverable error in signal watcher");
return;
}
halt = SHUT_REBOOT;
service_runlevel(6);
}
@@ -275,6 +300,11 @@ static void sigchld_cb(uev_t *w, void *arg, int events)
{
pid_t pid;
if (UEV_ERROR == events) {
_e("Unrecoverable error in signal watcher");
return;
}
/* Reap all the children! */
do {
pid = waitpid(-1, NULL, WNOHANG);
@@ -290,6 +320,11 @@ static void sigchld_cb(uev_t *w, void *arg, int events)
*/
static void sigstop_cb(uev_t *w, void *arg, int events)
{
if (UEV_ERROR == events) {
_e("Unrecoverable error in signal watcher");
return;
}
touch(SYNC_STOPPED);
stopped++;
}
@@ -299,6 +334,11 @@ static void sigstop_cb(uev_t *w, void *arg, int events)
*/
static void sigcont_cb(uev_t *w, void *arg, int events)
{
if (UEV_ERROR == events) {
_e("Unrecoverable error in signal watcher");
return;
}
stopped = 0;
erase(SYNC_STOPPED);
}