Do not print unprintable characters in filenames.

1 files changed, 9 insertions, 2 deletions

diff --git a/src/sanity.c b/src/sanity.c
index c542aec..dbcf57a 100644
--- a/src/sanity.c
+++ b/src/sanity.c
@@ -5,7 +5,7 @@
 
 extern const char *self;
 
-void bad_atari_filename(const char *fname, const char *msg) {
+int safe_print_filename(const char *fname, FILE *fh) {
 	char fn[50] = "";
 	char xbuf[5];
 	int i;
@@ -21,7 +21,14 @@ void bad_atari_filename(const char *fname, const char *msg) {
 		}
 	}
 
-	fprintf(stderr, "%s: warning: bad Atari filename \"%s\": %s\n", self, fn, msg);
+	fputs(fn, fh);
+	return strlen(fn);
+}
+
+void bad_atari_filename(const char *fname, const char *msg) {
+	fprintf(stderr, "%s: warning: bad Atari filename \"", self);
+	safe_print_filename(fname, stderr);
+	fprintf(stderr, "\": %s\n", msg);
 }
 
 /* note to self: it's tempting to use isalpha(), isprint(), etc