Add gentoo-mount to personal-utils

1 files changed, 125 insertions, 0 deletions

diff --git a/sys-apps/personal-utils/files/gentoo-mount b/sys-apps/personal-utils/files/gentoo-mount
new file mode 100755
index 0000000..f3cd674
--- /dev/null
+++ b/sys-apps/personal-utils/files/gentoo-mount
@@ -0,0 +1,125 @@
+#!/bin/sh
+set -e
+
+DIR=
+DEV_ROOT=
+
+while [ $# -gt 0 ]; do
+	case "$1" in
+		-h|--help)
+			echo "Usage: gentoo-mount [OPTION]... DIR"
+			echo "Simple script for mounting chrootable gentoo system to given"
+			echo "directory."
+			echo
+			echo "Options:"
+			echo "  -h, --help"
+			echo "    Print this help text."
+			echo "  -s, --sys-only"
+			echo "    Mount only system paths to already given prepared"
+			echo "    directory."
+			exit 0
+			;;
+		*)
+			if [ -z "$DIR" ]; then
+				DIR="$1"
+			else
+				echo "Unknown argument: $1" >&2
+				exit 1
+			fi
+			;;
+	esac
+	shift
+done
+
+if [ $(id -u) != 0 ]; then
+	echo "This script has to be run only as root." >&2
+	exit 1
+fi
+
+
+# Interactive mount
+# Usage: imount DEVICE PATH OPTIONS NAME
+#   DEVICE: device to mount. If not provided (empty) then ask user.
+#   PATH: path where mount will be mounted.
+#   OPTIONS: mount options (mount -o)
+#   NAME: optional name to be used for mapper
+imount() {
+	if [ -n "$1" ]; then
+		return mount -o "$3" "$1" "$2"
+	fi
+
+	echo "\e[1;32mPlease choose device\e[0m"
+	lsblk -o NAME,LABEL,SIZE,FSTYPE,MOUNTPOINT
+	while true; do
+		echo -n "Device: /dev/"
+		read DEVICE
+		if [ ! -b "/dev/$DEVICE" ]; then
+			echo "No such device: /dev/$DEVICE" >&2
+		else
+			break
+		fi
+	done
+
+	# Check if it's Luks partition and open it if it's
+	if cryptsetup isLuks "/dev/$DEVICE"; then
+		local CSNAME="$4"
+		while [ -e "/dev/mapper/$CSNAME" ]; do
+			CSNAME="${CSNAME}2"
+		done
+		echo "\e[1;32mOpening encrypted filesystem\e[0m"
+		cryptsetup open "/dev/$DEVICE" "$CSNAME"
+		DEVICE="mapper/$CSNAME"
+	fi
+
+	local OPTIONS="$3"
+	# Specially handle btrfs
+	if [ -n "$(blkid -t TYPE=btrfs "/dev/$DEVICE")" ]; then
+		if [ -n "$OPTIONS" ]; then
+			OPTIONS="$OPTIONS,compress=lzo"
+		else
+			OPTIONS="compress=lzo"
+		fi
+
+		local TMP="$(mktemp -d)"
+		mount "/dev/$DEVICE" "$TMP"
+		while true; do
+			echo "\e[1;32mPlease choose subvolume\e[0m"
+			btrfs subvolume list -t "$TMP"
+			# TODO default value? Probably same as name?
+			echo -n "Subvolume: "
+			read SUBVOL
+			if btrfs subvolume list "$TMP" | grep -q "$SUBVOL"; then
+				OPTIONS="$OPTIONS,subvol=$SUBVOL"
+				break
+			fi
+		done
+		umount "$TMP"
+		rmdir "$TMP"
+	fi
+
+	# And at last mount
+	mount -o "$OPTIONS" "/dev/$DEVICE" "$2"
+}
+
+# Mount root filesystem ##########################################################
+echo "\e[1;34mMount root filesystem\e[0m"
+imount "$DEV_ROOT" "$DIR" "" root
+
+
+# Mount system paths #############################################################
+echo "\e[1;34mMount system paths\e[0m"
+mount -t proc /proc "$DIR/proc"
+mount --rbind /dev "$DIR/dev"
+mount --rbind /sys "$DIR/sys"
+
+# Copy current resolv.conf #######################################################
+echo "\e[1;34mCopy system resolv.conf\e[0m"
+cp /etc/resolv.conf "$DIR/etc/resolv.conf"
+
+# Mount boot partition ###########################################################
+echo "\e[1;34mMount boot partition\e[0m"
+imount "$DEV_BOOT" "$DIR/boot"
+
+# Mount home partition ###########################################################
+echo "\e[1;34mMount home partition\e[0m"
+imount "$DEV_HOME" "$DIR/home"