84 lines
1.7 KiB
Bash
Executable file
84 lines
1.7 KiB
Bash
Executable file
#!/usr/bin/env bash
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help () {
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echo 'dchr-run [options] <chroot-dir> [command]'
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echo '-- options:'
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echo ' -u uid[:gid] invoke command in chroot as a different user'
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# TODO:
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#echo ' -x11 apply options for correctly starting GUI apps'
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echo 'https://dchr.dc09.ru'
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}
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clean () {
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echo '-- Cleaning up'
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umount "$1/proc"
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umount "$1/sys"
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umount "$1/dev"
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umount "$1/run"
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}
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error () {
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echo -e '-- \e[1;31mError\e[0m -- see output above'
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exit 1 # `trap` in main() calls cleanup function
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}
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setup () {
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echo '-- Mounting'
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mount -t proc /proc "$1/proc" || error
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mount -t sysfs /sys "$1/sys" || error
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mount -o bind /dev "$1/dev" || error
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mount -o bind /run "$1/run"
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}
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runcmd () {
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echo -e '-- \e[1;32mOK\e[0m -- running chroot'
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userspec="$1"
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chrdir="$2"
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shift 2
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chrcmd=("$@")
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[[ "$userspec" != "" ]] && \
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chroot "--userspec=$userspec" "$chrdir" "${chrcmd[@]}" || \
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chroot "$chrdir" "${chrcmd[@]}"
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}
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main () {
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[[ "$1" == "--help" || "$1" == "" ]] && help && exit 0
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userspec=""
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while [[ "$1" == -* ]]
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do
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case "$1" in
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-u)
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userspec="$2"
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shift 2
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;;
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#-x11);; TODO
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*)
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echo -ne '-- \e[1mInvalid option:\e[0m '
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echo "$1"
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echo '-- Use ./ or full path if your chroot-dir starts with dash (-)'
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help
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exit 2
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;;
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esac
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done
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chrdir=$(readlink -f "$1")
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shift
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trap "clean \"$chrdir\"" EXIT
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setup "$chrdir"
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runcmd "$userspec" "$chrdir" "$@"
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exit $?
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}
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sourced () {
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[ -n "$ZSH_VERSION" ] && [[ "$ZSH_EVAL_CONTEXT" =~ :file ]] && return 0
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[ -n "$BASH_VERSION" ] && [[ "$0" != "$BASH_SOURCE" ]] && return 0
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return 1
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}
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sourced || main "$@"
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