[backfire] backport r27630

[openwrt-10.03/.git] / package / base-files / files / sbin / sysupgrade

diff --git a/package/base-files/files/sbin/sysupgrade b/package/base-files/files/sbin/sysupgrade
index cae59dc6b85e4f227d6e6c0328a734cbad63581d..0597752bd3583af1d24f4c9efc3239b76d08c3d5 100755 (executable)
--- a/package/base-files/files/sbin/sysupgrade
+++ b/package/base-files/files/sbin/sysupgrade
@@ -9,6 +9,8 @@ export VERBOSE=1
 export SAVE_CONFIG=1
 export DELAY=
 export CONF_IMAGE=
+export HELP=0
+
 # parse options
 while [ -n "$1" ]; do 
        case "$1" in
@@ -18,6 +20,7 @@ while [ -n "$1" ]; do
                -q) export VERBOSE="$(($VERBOSE - 1))";;
                -n) export SAVE_CONFIG=0;;
                -f) export CONF_IMAGE="$2"; shift;;
+               -h|--help) export HELP=1; break;;
                -*)
                        echo "Invalid option: $1"
                        exit 1
@@ -33,7 +36,7 @@ export CONF_TAR=/tmp/sysupgrade.tgz
 export ARGV="$*"
 export ARGC="$#"
 
-[ -z "$ARGV" ] && {
+[ -z "$ARGV" -o $HELP -gt 0 ] && {
        cat <<EOF
 Usage: $0 [options] <image file or URL>
 
@@ -44,6 +47,7 @@ Options:
        -n           do not save configuration over reflash
        -q           less verbose
        -v           more verbose
+       -h / --help  display this help
 
 EOF
        exit 1