update: optimize log output

src/utils/process.c

@@ -55,7 +55,6 @@ void process_exec(process *proc) {
         log_perror("%s fork error -> ", proc->name);
         server_exit(EXIT_FORK_ERROR);
     } else if (pid == 0) { // child process
-        log_debug("Subprocess fork success -> PID = %d", getpid());
         if (chdir(proc->cwd)) { // change working directory
             log_perror("%s with invalid cwd `%s` -> ", proc->name, proc->cwd);
             exit(EXIT_EXEC_ERROR);
@@ -155,11 +154,11 @@ void get_exit_signal() { // get SIGINT or SIGTERM signal
 
 void get_sub_exit() { // catch child process exit
     if (EXITING) {
-        log_debug("Skip SIGCHLD signal");
+        log_debug("Skip handle SIGCHLD");
         return;
     }
     int status;
-    log_debug("Handle SIGCHLD begin");
+    log_debug("Start handle SIGCHLD");
     for (process **proc = process_list; *proc != NULL; ++proc) {
         if ((*proc)->pid == 0) {
             continue; // skip not running process