set SIGINT and SIGTSTP to default handlers; re-raise the signal

console.c

@@ -4,11 +4,24 @@
 #include <sys/stat.h>
 #include <fcntl.h>
 #include <unistd.h>
+#include <signal.h>
 
 // Bind a shell to a serial console and ensure
 // the session has support for job control (e.g.,
 // ctrl+c, ctrl+z)
 
+// Explicitly re-raise the signal to the default handler
+
+void handle_sigint(int sig) {
+    signal(sig, SIG_DFL);
+    raise(sig);
+}
+
+void handle_sigtstp(int sig) {
+    signal(sig, SIG_DFL);
+    raise(sig);
+}
+
 int main(int argc, char **argv) {
     int fd;
 
@@ -43,5 +56,9 @@ int main(int argc, char **argv) {
     putenv("TERM=linux");
     putenv("PATH=/sbin:/bin:/usr/sbin:/usr/bin");
 
+    // Set up signal handlers for SIGINT and SIGTSTP
+    signal(SIGINT, handle_sigint);
+    signal(SIGTSTP, handle_sigtstp);
+
     return execl(SHELL, SHELL, NULL);
 }