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/* SPDX-License-Identifier: ISC */
#include "init.h"
static const char *status_str[] = {
[STATE_OFF] = NULL,
[STATE_QUEUED] = NULL,
[STATE_RUNNING] ="\033[22;33m UP \033[0m",
[STATE_COMPLETED] = "\033[22;32mDONE\033[0m",
[STATE_FAILED] ="\033[22;31mFAIL\033[0m",
};
static void print_status(const char *msg, int type)
{
printf("[%s] %s\n", status_str[type], msg);
fflush(stdout);
}
static void respawn(svc_run_data_t *rt)
{
if (rt->svc->rspwn_limit > 0) {
rt->rspwn_count += 1;
if (rt->rspwn_count >= rt->svc->rspwn_limit)
goto fail;
}
rt->pid = runsvc(rt->svc);
if (rt->pid == -1)
goto fail;
rt->state = STATE_RUNNING;
return;
fail:
rt->state = STATE_FAILED;
print_status(rt->svc->desc, rt->state);
return;
}
static svc_run_data_t *wait_for_process(void)
{
svc_run_data_t *rt;
int status;
pid_t pid;
do {
pid = wait(&status);
rt = config_rt_data_by_pid(pid);
} while (rt == NULL);
rt->status = WIFEXITED(status) ? WEXITSTATUS(status) : EXIT_FAILURE;
rt->pid = -1;
if (rt->svc->type == SVC_RESPAWN) {
if (config_should_respawn())
respawn(rt);
} else {
if (rt->status == EXIT_SUCCESS) {
rt->state = STATE_COMPLETED;
} else {
rt->state = STATE_FAILED;
}
print_status(rt->svc->desc, rt->state);
if (rt->svc->type == SVC_ONCE)
config_singleshot_terminated();
}
return rt;
}
static void handle_signal(int signo)
{
switch (signo) {
case SIGTERM:
config_set_target(TGT_SHUTDOWN);
break;
case SIGINT:
config_set_target(TGT_REBOOT);
break;
case SIGHUP:
break;
case SIGUSR1:
break;
}
}
static void check_target_completion(void)
{
if (!config_is_current_target_complete())
return;
switch (config_get_current_target()) {
case TGT_BOOT:
break;
case TGT_SHUTDOWN:
for (;;)
reboot(RB_POWER_OFF);
break;
case TGT_REBOOT:
for (;;)
reboot(RB_AUTOBOOT);
break;
}
}
int main(void)
{
svc_run_data_t *rt, *terminated;
struct sigaction act;
service_t *svc;
if (config_load())
return EXIT_FAILURE;
memset(&act, 0, sizeof(act));
act.sa_handler = handle_signal;
sigaction(SIGTERM, &act, NULL);
sigaction(SIGINT, &act, NULL);
sigaction(SIGHUP, &act, NULL);
sigaction(SIGUSR1, &act, NULL);
if (reboot(LINUX_REBOOT_CMD_CAD_OFF))
perror("cannot disable CTRL+ALT+DEL");
for (;;) {
rt = config_dequeue();
if (rt == NULL) {
terminated = wait_for_process();
if (terminated != NULL)
check_target_completion();
continue;
}
svc = rt->svc;
if (svc->flags & SVC_FLAG_HAS_EXEC) {
rt->pid = runsvc(rt->svc);
if (rt->pid == -1) {
rt->state = STATE_FAILED;
print_status(svc->desc, rt->state);
} else {
rt->state = STATE_RUNNING;
print_status(svc->desc, rt->state);
switch (svc->type) {
case SVC_WAIT:
for (;;) {
terminated = wait_for_process();
if (terminated == rt)
break;
}
break;
case SVC_ONCE:
config_singleshot_started();
break;
}
}
} else {
rt->status = EXIT_SUCCESS;
rt->state = STATE_COMPLETED;
print_status(svc->desc, rt->state);
}
check_target_completion();
}
return EXIT_SUCCESS;
}
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