Get rid of double "invalid option" errors in alf.

1 files changed, 3 insertions, 0 deletions

diff --git a/src/alf.c b/src/alf.c
index 8fedb20..be47344 100644
--- a/src/alf.c
+++ b/src/alf.c
@@ -311,6 +311,9 @@ int main(int argc, char **argv) {
 		usage();
 	}
 
+	/* don't let getopt() print error message for us. */
+	opterr = 0;
+
 	while((opt = getopt(argc, argv, "ao")) != -1) {
 		switch(opt) {
 			case 'a': opt_append = 1; opt_overwrite = 1; break;