Show usage string for 'git imap-send -h'

Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/imap-send.c b/imap-send.c
index 3847fd151df6e9f41fdb0b95573882a7d9ac992a..04e537406e4113d5c1ead7b7e4a1a425c9b2bf09 100644 (file)
--- a/imap-send.c
+++ b/imap-send.c
@@ -93,6 +93,8 @@ struct msg_data {
        unsigned int crlf:1;
 };
 
+static const char imap_send_usage[] = "git imap-send < <mbox>";
+
 #define DRV_OK          0
 #define DRV_MSG_BAD     -1
 #define DRV_BOX_BAD     -2
@@ -1491,6 +1493,9 @@ int main(int argc, char **argv)
 
        git_extract_argv0_path(argv[0]);
 
+       if (argc != 1)
+               usage(imap_send_usage);
+
        /* init the random number generator */
        arc4_init();