From 1f4dbe8d4045cbf4e1bbda7f1dcd18f0f6d0cc87 Mon Sep 17 00:00:00 2001
From: Stefan Rueger <stefan.rueger@urclocks.com>
Date: Mon, 22 Apr 2024 15:17:46 +0100
Subject: [PATCH] return LIBAVRDUDE_EXIT instead of exit(0)

---
 src/libavrdude.h | 1 +
 src/serialupdi.c | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/libavrdude.h b/src/libavrdude.h
index 453b22a0..60cf4ebf 100644
--- a/src/libavrdude.h
+++ b/src/libavrdude.h
@@ -59,6 +59,7 @@ typedef uint32_t pinmask_t;
 #define LIBAVRDUDE_NOTSUPPORTED (-2) // operation not supported
 #define LIBAVRDUDE_SOFTFAIL (-3) // returned, eg, by avr_signature() if caller
                                  // might proceed with chip erase
+#define LIBAVRDUDE_EXIT (-4)     // End all operations in this session
 
 /* formerly lists.h */
 
diff --git a/src/serialupdi.c b/src/serialupdi.c
index 51a9de79..210b24d4 100644
--- a/src/serialupdi.c
+++ b/src/serialupdi.c
@@ -1026,7 +1026,7 @@ static int serialupdi_parseextparms(const PROGRAMMER *pgm, const LISTID extparms
       msg_error("%s -c %s extended options:\n", progname, pgmid);
       msg_error("  -xrtsdtr=low,high Force RTS/DTR lines low or high state during programming\n");
       msg_error("  -xhelp            Show this help menu and exit\n");
-      exit(0);
+      return LIBAVRDUDE_EXIT;;
     }
 
     pmsg_error("invalid extended parameter '%s'\n", extended_param);