add --help flag

1 files changed, 23 insertions, 2 deletions

diff --git a/testboot.sh b/testboot.sh
index 120b813..fd65f58 100755
--- a/testboot.sh
+++ b/testboot.sh
@@ -18,14 +18,35 @@ compress=${compress:-$(type -P pigz || type -P xz)}
 
 [ "$compress" = "xz" ] && compress="xz --check-crc32 -1"
 
+printhelp() {
+cat << __EOT__
+Usage: $(basename $0) [OPTION...] [KERNEL ARGS...]
+Boot a Fedora(ish) iso in a VM with the given kernel args.
+
+  -h, --help            show this help
+  -m, --ram=RAM         create VM with this much ram (in MB)
+  -c, --virtconsole     add a virtual console device (hvc0)
+  -s, --serialconsole   add a serial console device (ttyS0)
+  -t, --text            create VM with no graphics (console output on-screen)
+  -d, --fromcd          boot from the CDROM device
+      --nocd            don't attach the CDROM device
+      --dualnic         create VM with two NICs
+      --nonic           create VM with no NICs
+
+Edit testboot.conf to configure the paths and the ISO to use.
+__EOT__
+}
+
+
 usecd="true"
 usenet="true"
-ARGS=$(getopt --options "dcstm:" \
-  --longoptions "fromcd,nocd,virtconsole,serialconsole,text,dualnic,nonic,ram:"\
+ARGS=$(getopt --options "hdcstm:" \
+  --longoptions "help,fromcd,nocd,virtconsole,serialconsole,text,dualnic,nonic,ram:"\
   --name testboot.sh \
   -- "$@") || exit 1
 eval set -- "$ARGS"
 while :; do case "$1" in
+    -h|--help) printhelp; exit 0;;
     -d|--fromcd) fromcd="true"; shift;;
     --nocd) usecd=""; shift;;
     --dualnic) dualnic="yes"; shift;;