Unblock all signals blocked by finit when starting children

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>

helpers.c

@@ -466,7 +466,9 @@ int run(char *cmd)
 			dup2(fd, STDERR_FILENO);
 		}
 
+		sig_unblock();
 		execvp(args[0], args);
+
 		_exit(1); /* Only if execv() fails. */
 	} else if (-1 == pid) {
 		_pe("%s", args[0]);
@@ -566,10 +568,8 @@ pid_t run_getty(char *cmd, char *args[], int console)
 	pid_t pid = vfork();
 
 	if (!pid) {
-		int i, fd;
+		int fd;
 		char c;
-		sigset_t nmask;
-		struct sigaction sa;
 
 		if (console) {
 			/* Detach from initial controlling TTY */
@@ -590,13 +590,8 @@ pid_t run_getty(char *cmd, char *args[], int console)
 
 			prctl(PR_SET_NAME, "console", 0, 0, 0);
 		}
-		sigemptyset(&nmask);
-		sigaddset(&nmask, SIGCHLD);
-		sigprocmask(SIG_UNBLOCK, &nmask, NULL);
 
-		/* Reset signal handlers that were set by the parent process */
-		for (i = 1; i < NSIG; i++)
-			DFLSIG(sa, i, 0);
+		sig_unblock();
 
 		while (!fexist(SYNC_SHUTDOWN)) {
 			static const char msg[] = "\nPlease press Enter to activate this console.";
@@ -672,6 +667,7 @@ int run_parts(char *dir, char *cmd)
 		pid = vfork();
 		if (!pid) {
 			_d("Calling %s ...", path);
+			sig_unblock();
 			execv(path, args);
 			exit(0);
 		}

sig.c

@@ -148,6 +148,29 @@ void sig_init(void)
 	SETSIG(sa, SIGCHLD, chld_handler, SA_RESTART);
 }
 
+/*
+ * Unblock all signals blocked by finit when starting children
+ */
+void sig_unblock(void)
+{
+	int i;
+	sigset_t nmask;
+	struct sigaction sa;
+
+	sigemptyset(&nmask);
+	sigaddset(&nmask, SIGCHLD);
+	sigaddset(&nmask, SIGINT);
+	sigaddset(&nmask, SIGPWR);
+	sigaddset(&nmask, SIGSTOP);
+	sigaddset(&nmask, SIGTSTP);
+	sigaddset(&nmask, SIGCONT);
+	sigprocmask(SIG_UNBLOCK, &nmask, NULL);
+
+	/* Reset signal handlers that were set by the parent process */
+	for (i = 1; i < NSIG; i++)
+		DFLSIG(sa, i, 0);
+}
+
 /*
  * Setup limited set of SysV compatible signals to respond to
  */

sig.h

@@ -58,6 +58,7 @@
 void do_shutdown    (int sig);
 int  sig_stopped    (void);
 void sig_init       (void);
+void sig_unblock    (void);
 void sig_setup      (uev_ctx_t *ctx);
 
 #endif /* FINIT_SIG_H_ */