Fix #47: Prompt for overwrite.

diff --git a/src/curses/ux_input.c b/src/curses/ux_input.c
index ab1256548b4025418211e13106e59536b1405604..ce616904a93965b63f2b4986e7fecf0a2f2801f8 100644 (file)
--- 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;