tools/mkeficapsule: improve online help

Show short arguments along with long arguments in online help:

    $ tools/mkeficapsule -h
    Usage: mkeficapsule [options] <output file>
    Options:
        -f, --fit <fit image>       new FIT image file
        -r, --raw <raw image>       new raw image file
        -i, --index <index>         update image index
        -I, --instance <instance>   update hardware instance
        -K, --public-key <key file> public key esl file
        -D, --dtb <dtb file>        dtb file
        -O, --overlay               the dtb file is an overlay
        -h, --help                  print a help message

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>

diff --git a/tools/mkeficapsule.c b/tools/mkeficapsule.c
index f272512..de0a628 100644 (file)
--- a/tools/mkeficapsule.c
+++ b/tools/mkeficapsule.c
@@ -64,14 +64,14 @@ static void print_usage(void)
        printf("Usage: %s [options] <output file>\n"
               "Options:\n"
 
-              "\t--fit <fit image>       new FIT image file\n"
-              "\t--raw <raw image>       new raw image file\n"
-              "\t--index <index>         update image index\n"
-              "\t--instance <instance>   update hardware instance\n"
-              "\t--public-key <key file> public key esl file\n"
-              "\t--dtb <dtb file>        dtb file\n"
-              "\t--overlay               the dtb file is an overlay\n"
-              "\t--help                  print a help message\n",
+              "\t-f, --fit <fit image>       new FIT image file\n"
+              "\t-r, --raw <raw image>       new raw image file\n"
+              "\t-i, --index <index>         update image index\n"
+              "\t-I, --instance <instance>   update hardware instance\n"
+              "\t-K, --public-key <key file> public key esl file\n"
+              "\t-D, --dtb <dtb file>        dtb file\n"
+              "\t-O, --overlay               the dtb file is an overlay\n"
+              "\t-h, --help                  print a help message\n",
               tool_name);
 }