alpinelinux-amd64: add initial implementation

1 files changed, 33 insertions, 0 deletions

diff --git a/scripts/uchroot b/scripts/uchroot
new file mode 100755
index 0000000..77f3f10
--- /dev/null
+++ b/scripts/uchroot
@@ -0,0 +1,33 @@
+#!/bin/sh
+set -e
+[ $# -ge 1 ] || {
+	echo "Usage: uchroot ROOT [CMD] [ARG].." >&2
+	exit 1
+}
+
+if [ "$(id -u)" != "0" ]; then
+	exec uroot "$0" "$@"
+fi
+###############################################################
+
+ROOT="$1"
+shift
+[ -d "$ROOT" ] || {
+	echo "There is no such directory: $ROOT" >&2
+	exit 1
+}
+[ -d "$ROOT/proc" -a -d "$ROOT/dev" -a -d "$ROOT/sys" ] || {
+	echo "Root seems to not contain valid rootfs: $ROOT" >&2
+	exit 1
+}
+
+
+mount -t proc none "$ROOT/proc"
+mount --rbind /dev "$ROOT/dev"
+mount --rbind /sys "$ROOT/sys"
+cp -f /etc/resolv.conf "$ROOT/etc/resolv.conf"
+
+if [ $# -lt 1 ]; then
+	set "/bin/sh"
+fi
+exec chroot "$ROOT" "$@"