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Add signal handlers to handle termination and reload

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nirenjan 2021-07-25 15:39:20 -07:00
parent e4d1b6aff2
commit e0d15961e0
1 changed files with 49 additions and 1 deletions
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50
daemon/x52d_main.c
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@ -10,7 +10,9 @@
#include <stdio.h>
#include <stdbool.h>
#include <string.h>
#include <signal.h>
#include <unistd.h>
#include <errno.h>
#include "x52d_clock.h"
#include "x52d_const.h"
@ -18,6 +20,19 @@
#include "x52d_device.h"
#include "pinelog.h"
static volatile bool flag_quit;
static void termination_handler(int signum)
{
flag_quit = true;
}
static volatile bool flag_reload;
static void reload_handler(int signum)
{
flag_reload = true;
}
static void set_log_file(bool foreground, const char *log_file)
{
int rc = 0;
@ -37,6 +52,22 @@ static void set_log_file(bool foreground, const char *log_file)
}
}
static void listen_signal(int signum, void (*handler)(int))
{
struct sigaction action;
int rc;
action.sa_handler = handler;
sigemptyset(&action.sa_mask);
action.sa_flags = 0;
rc = sigaction(signum, &action, NULL);
if (rc < 0) {
PINELOG_FATAL(_("Error %d installing signal handler for signal %d: %s"),
errno, signum, strerror(errno));
}
}
#if HAVE_FUNC_ATTRIBUTE_NORETURN
__attribute__((noreturn))
#endif
@ -133,6 +164,12 @@ int main(int argc, char **argv)
set_log_file(foreground, log_file);
x52d_config_load(conf_file);
// Initialize signal handlers
listen_signal(SIGINT, termination_handler);
listen_signal(SIGTERM, termination_handler);
listen_signal(SIGQUIT, termination_handler);
listen_signal(SIGHUP, reload_handler);
// Start device threads
x52d_dev_init();
x52d_clock_init();
@ -140,11 +177,22 @@ int main(int argc, char **argv)
// Apply configuration
x52d_config_apply();
for(;;) {
flag_quit = false;
while(!flag_quit) {
// TODO: Replace with main event loop
// Let all threads run in background forever
sleep(600);
/* Check if we need to reload configuration */
if (flag_reload) {
PINELOG_TRACE("Reinitializing configuration");
x52d_config_load(conf_file);
x52d_config_apply();
flag_reload = false;
}
}
PINELOG_INFO(_("Shutting down X52 daemon"));
return 0;
}