From a1fad59f2d6a830d8e32c6976a1595cab0e6519c Mon Sep 17 00:00:00 2001
From: nhmall <nhmall@nethack.org>
Date: Fri, 22 May 2026 12:24:32 -0400
Subject: [PATCH] idlecheckpoint support in curses

---
 include/config.h      |  1 +
 win/curses/cursmisc.c | 31 ++++++++++++++++++++++++++++---
 2 files changed, 29 insertions(+), 3 deletions(-)

diff --git a/include/config.h b/include/config.h
index 4fcc892e0..21556bcc4 100644
--- a/include/config.h
+++ b/include/config.h
@@ -690,6 +690,7 @@ typedef unsigned char uchar;
  * Currently has support in:
  *     WIN32CON
  *     Qt
+ *     curses
  */
 
 /* #define IDLECHECKPOINT */
diff --git a/win/curses/cursmisc.c b/win/curses/cursmisc.c
index 3084d193a..e085d54d3 100644
--- a/win/curses/cursmisc.c
+++ b/win/curses/cursmisc.c
@@ -34,16 +34,41 @@ int
 curses_getch(void)
 {
     int ch;
+    boolean timeoutset = FALSE;
 
-    if (iflags.debug_fuzzer)
+    if (iflags.debug_fuzzer) {
         ch = randomkey();
-    else
+    } else if (iflags.idlecheckpoint) {
+        boolean done_a_checkpoint = FALSE;
+
+        done_a_checkpoint = FALSE;
+        timeout(IDLECHECKPOINT_WAIT_TIME * 1000);
+        timeoutset = TRUE;
+
+        while (1) {
+            ch = getch();
+            if (ch == ERR && !done_a_checkpoint) {
+#ifdef INSURANCE
+                save_currentstate();
+#endif /* INSURANCE */
+                done_a_checkpoint = TRUE;
+                timeout(-1);
+                timeoutset = FALSE;
+            } else {
+                if (timeoutset) {
+                    timeout(-1);
+                    timeoutset = FALSE;
+                }
+                break;
+            }
+        }
+    } else {
         ch = getch();
+    }
     return ch;
 }
 
 /* Read a character of input from the user */
-
 int
 curses_read_char(void)
 {