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