From 4de8c34f2116fff554af6216c30ec9d41bf50b24 Mon Sep 17 00:00:00 2001
From: David Griffith <dave@661.org>
Date: Tue, 4 Sep 2018 02:32:20 -0700
Subject: [PATCH] Fix #47: Prompt for overwrite.

---
 src/curses/ux_input.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/src/curses/ux_input.c b/src/curses/ux_input.c
index ab12565..ce61690 100644
--- a/src/curses/ux_input.c
+++ b/src/curses/ux_input.c
@@ -27,6 +27,7 @@
 #include <string.h>
 #include <limits.h>
 #include <libgen.h>
+#include <ctype.h>
 
 #include <errno.h>
 #include <sys/time.h>
@@ -727,12 +728,14 @@ zchar os_read_key (int timeout, int cursor)
  *
  */
 
-int os_read_file_name (char *file_name, const char *default_name, int UNUSED(flag))
+int os_read_file_name (char *file_name, const char *default_name, int flag)
 {
+    FILE *fp;
     int saved_replay = istream_replay;
     int saved_record = ostream_record;
     int i;
     char *tempname;
+    zchar answer[4];
 
     /* Turn off playback and recording temporarily */
     istream_replay = 0;
@@ -796,6 +799,15 @@ int os_read_file_name (char *file_name, const char *default_name, int UNUSED(fla
 	strcat(file_name, tempname);
     }
 
+    /* Warn if overwriting a file. */
+    if ((flag == FILE_SAVE || flag == FILE_SAVE_AUX || flag == FILE_RECORD)
+	&& ((fp = fopen(file_name, "rb")) != NULL)) {
+	fclose (fp);
+	print_string("Overwrite existing file? ");
+	read_string(4, answer);
+	return(tolower(answer[0]) == 'y');
+    }
+
     /* Restore state of playback and recording */
     istream_replay = saved_replay;
     ostream_record = saved_record;
-- 
2.34.1