basic system imaging

dotfiles-old/scripts/grammy/image.sh

@@ -0,0 +1,38 @@
+#!/bin/sh
+
+set -e
+
+argv0="$0"
+argv1="$1"
+argv2="$2"
+
+FILE_NAME="image.img.gz"
+COMPACT="gzip -c"
+EXTRACT="gzip -cd"
+
+usage() {
+	printf "Usage: $argv0 {save,deploy} [device]
+
+Examples:
+	$argv0 save /dev/sda1  # images installation at /dev/sda1
+	$argv0 deploy /dev/sda # deploys saved image to /dev/sda
+
+In-program constants (edit this script to change them):
+	\$FILE_NAME - where to save/read the image
+	\$COMPACT - command to compact the image (such as \"gzip -c\" to
+	            compress with gzip)
+	\$EXTRACT - command to extract the image (such as \"gzip -cd\" to
+	            extract gzip)\n"
+	exit 1
+}
+
+[ -n "$argv2" ] || usage
+
+set -x
+
+case "$argv1" in
+(save)   $COMPACT <"$argv2" >"$FILE_NAME" ;;
+(deploy) $EXTRACT <"$FILE_NAME" >"$argv2" ;;
+esac
+
+exit 0