From 956ea5c79884e4adde9076fd2251b77af5d27c5c Mon Sep 17 00:00:00 2001
From: Daniel Cerqueira <dan.git@lispclub.com>
Date: Sun, 23 Aug 2026 13:44:47 +0100
Subject: signal and new exit codes

 - redo numbers of previous exit codes
 - handle SIGINT and SIGTERM signals
 - ignore SIGHUP signal
---
 lali.c | 25 +++++++++++++++++++++----
 1 file changed, 21 insertions(+), 4 deletions(-)

diff --git a/lali.c b/lali.c
index 2b67f2a..b480c55 100644
--- a/lali.c
+++ b/lali.c
@@ -34,6 +34,7 @@
 
 #include "liblali.h"
 
+#include <signal.h>
 #include <getopt.h>
 
 #include <readline/readline.h>
@@ -42,10 +43,13 @@
 #define YEARS                "2025, 2026"
 #define SOURCE_URL           "https://gitlab.com/alexandre1985/lali/"
 
-#define EXIT_FAIL_UNKNOWN_ARGOPT    2
-#define EXIT_FAIL_OPEN_FILE         3
-#define EXIT_FAIL_REPL_WITH_PIPING  4
-#define EXIT_FAIL_LANG              5
+#define EXIT_FAIL_UNKNOWN_ARGOPT    -1
+#define EXIT_FAIL_OPEN_FILE         -2
+#define EXIT_FAIL_REPL_WITH_PIPING  -3
+#define EXIT_FAIL_LANG              -4
+
+#define EXIT_SIGINT                  2
+#define EXIT_SIGTERM                 3
 
 // MAIN ///////////////////////////////////////////////////////////////////////
 
@@ -105,8 +109,21 @@ void runREPL(int infd, Object **env, GC_PARAM) {
   free(replLine);
 }
 
+void sig_int_handler(int sig) {
+  exit(EXIT_SIGINT);
+}
+
+void sig_term_handler(int sig) {
+  exit(EXIT_SIGTERM);
+}
+
 int main(int argc, char *argv[]) {
 
+  /// Signals
+  signal(SIGINT, sig_int_handler);
+  signal(SIGTERM, sig_term_handler);
+  signal(SIGHUP, SIG_IGN);  // ignore this signal
+
   /// Options processing
 
   int opt_repl = 0;  // false
-- 
cgit