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-rwxr-xr-xcontrib/kiss-chroot58
1 files changed, 58 insertions, 0 deletions
diff --git a/contrib/kiss-chroot b/contrib/kiss-chroot
new file mode 100755
index 0000000..372ef0a
--- /dev/null
+++ b/contrib/kiss-chroot
@@ -0,0 +1,58 @@
+#!/bin/sh -e
+#
+# kiss-chroot: Enter a chroot.
+
+log() {
+ printf '\033[32m->\033[m %s.\n' "$*"
+}
+
+die() {
+ log "$*" >&2
+ exit 1
+}
+
+clean() {
+ log Unmounting /dev, /proc and /sys from chroot; {
+ umount "$1/dev" ||:
+ umount "$1/proc" ||:
+ umount "$1/sys" ||:
+ }
+
+ log Cleaning leftover host files; {
+ rm -f "$1/root/.ash_history"
+ rm -f "$1/etc/resolv.conf"
+ }
+}
+
+main() {
+ [ -z "$1" ] && die Need a path to the chroot
+ [ -d "$1" ] || die Given path does not exist
+ [ "$(id -u)" = 0 ] || die Script needs to be run as root
+
+ trap 'clean "$1"' EXIT INT
+
+ log Mounting /dev, /proc and /sys from host; {
+ mountpoint -q "$1/dev" || mount -o bind /dev "$1/dev"
+ mountpoint -q "$1/proc" || mount -t proc proc "$1/proc"
+ mountpoint -q "$1/sys" || mount -t sysfs sys "$1/sys"
+
+ }
+
+ log Copying /etc/resolv.conf from host; {
+ cp /etc/resolv.conf "$1/etc"
+ }
+
+ log Entering chroot; {
+ chroot "$1" /usr/bin/env -i \
+ HOME=/root \
+ TERM="$TERM" \
+ SHELL=/bin/sh \
+ USER=root \
+ CFLAGS="-march=x86-64 -mtune=generic -pipe -Os" \
+ CXXFLAGS="-march=x86-64 -mtune=generic -pipe -Os" \
+ MAKEFLAGS="-j$(nproc 2>/dev/null || echo 1)" \
+ /bin/sh -l
+ }
+}
+
+main "$@"