From bb0a0054c8b23c666f84907ef8cfc79cfe472f1e Mon Sep 17 00:00:00 2001 From: Lassi Kortela Date: Thu, 23 Apr 2020 13:59:27 +0300 Subject: [PATCH] Write usage to stderr when bad options given --- main.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/main.c b/main.c index 477854a3..47d03fc6 100644 --- a/main.c +++ b/main.c @@ -31,7 +31,8 @@ #if SEXP_USE_MAIN_HELP void sexp_usage(int err) { - printf("usage: chibi-scheme [ ...] [ ...]\n" + FILE *out = err ? stderr : stdout; + fprintf(out, "usage: chibi-scheme [ ...] [ ...]\n" #if SEXP_USE_FOLD_CASE_SYMS " -f - case-fold symbols\n" #endif