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Command "copy-skel" implemented
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 12 Sep 2022 09:40:20 +0200
parents 39268cba8c46
children dde5967d1e43
comparison
equal deleted inserted replaced
255:7f21d242f79f 256:68f091c9524a
68 68
69 -L Populate having a "skeleton" subdirectory within the mountpoint 69 -L Populate having a "skeleton" subdirectory within the mountpoint
70 -P Populate directly into the mountpoint 70 -P Populate directly into the mountpoint
71 71
72 snapshot-tmpl BASE-RO SKELETON-RW SNAPSHOT-NAME 72 snapshot-tmpl BASE-RO SKELETON-RW SNAPSHOT-NAME
73
74 copy-skel [ OPTIONS ] SOURCE-DS SNAPSHOT-NAME TARGET-DS
75
76 -A Set "canmount=noauto" for all datasets in the target dataset
77 -L Copy dataset properties optimized for employing a
78 "skeleton" subdirectory
79 -P Copy dataset properties optimized for direct mounts
80 of skeleton children over an already mounted base
81 -u Do not mount the target dataset automatically
73 82
74 ENVIRONMENT: 83 ENVIRONMENT:
75 84
76 All environment variables that affect "zfs" are effective also. 85 All environment variables that affect "zfs" are effective also.
77 86
240 249
241 if [ "${_opt_symlink}" = "yes" ]; then 250 if [ "${_opt_symlink}" = "yes" ]; then
242 # In this case the skeleton root needs to be mounted into a "skeleton" subdir 251 # In this case the skeleton root needs to be mounted into a "skeleton" subdir
243 zfs create -u -o canmount=noauto "${_ds_skel}" 252 zfs create -u -o canmount=noauto "${_ds_skel}"
244 else 253 else
245 # Only childres are to be mounted 254 # Only children are to be mounted
246 zfs create -u -o canmount=off "${_ds_skel}" 255 zfs create -u -o canmount=off "${_ds_skel}"
247 fi 256 fi
257 # "usr" is only a container holding "usr/local"
248 zfs create -u -o canmount=off "${_ds_skel}/usr" 258 zfs create -u -o canmount=off "${_ds_skel}/usr"
249 # 259 #
250 # XXX FIXME: What about usr/ports/distfiles 260 # XXX FIXME: What about usr/ports/distfiles
251 # We typically want to use binary packages. 261 # We typically want to use binary packages.
252 # And if we use ports they are not in usr/ports typically. 262 # And if we use ports they are not in usr/ports typically.
687 [ -z "${_ds_skel}" ] && { echo "ERROR: no RW skeleton dataset name given" 1>&2; return 2; } 697 [ -z "${_ds_skel}" ] && { echo "ERROR: no RW skeleton dataset name given" 1>&2; return 2; }
688 698
689 _do_snapshot "${_ds_base}" "${_snap_name}" || return 699 _do_snapshot "${_ds_base}" "${_snap_name}" || return
690 _do_snapshot "${_ds_skel}" "${_snap_name}" || return 700 _do_snapshot "${_ds_skel}" "${_snap_name}" || return
691 return 0 701 return 0
702 }
703
704
705 #:
706 #: Implementation of "copy-skel"
707 #:
708 command_copy_skel() {
709 local _ds_source _snapshot_name _ds_target
710 local _opt_symlink _opt_nomount
711
712 local _opt _name _relative_name _opt_canmount
713
714 _opt_symlink=""
715 _opt_nomount=""
716 _opt_canmount="-o canmount=on"
717
718
719 while getopts "ALPu" _opt ; do
720 case ${_opt} in
721 A)
722 _opt_canmount="-o canmount=noauto"
723 ;;
724 L)
725 _opt_symlink="yes"
726 ;;
727 P)
728 _opt_symlink="no"
729 ;;
730 u)
731 _opt_nomount="-u"
732 ;;
733 \?)
734 return 2;
735 ;;
736 esac
737 done
738 shift $((OPTIND-1))
739 OPTIND=1
740
741 [ -z "${_opt_symlink}" ] && { echo "ERROR: -L or -P must be given" 1>&2; return 2; }
742
743 _ds_source="${1-}"
744 _snapshot_name="${2-}"
745 _ds_target="${3-}"
746
747 [ -z "${_ds_source}" ] && { echo "ERROR: no source given" 1>&2; return 2; }
748 [ -z "${_snapshot_name}" ] && { echo "ERROR: no snapshot name given" 1>&2; return 2; }
749 [ -z "${_ds_target}" ] && { echo "ERROR: no target given" 1>&2; return 2; }
750
751 zfs list -r -t all -o name "${_ds_source}" \
752 | {
753 while IFS=$'\t' read -r _name ; do
754 if [ "${_name}" = "${_name%@*}@${_snapshot_name}" ]; then
755 echo "FOUND: $_name"
756 # Determine the relative name of the dataset
757 _relative_name="${_name#${_ds_source}}"
758 _relative_name="${_relative_name%@*}"
759 echo " -> $_relative_name"
760 if [ -z "${_relative_name}" ]; then
761 # root
762 if [ "${_opt_symlink}" = "yes" ]; then
763 zfs send -Lec -p -v "${_name}" | zfs receive ${_opt_nomount} -v ${_opt_canmount} -x mountpoint "${_ds_target}${_relative_name}"
764 else
765 zfs send -Lec -p -v "${_name}" | zfs receive ${_opt_nomount} -v -o canmount=off -x mountpoint "${_ds_target}${_relative_name}"
766 fi
767 else
768 # child
769 if [ "${_relative_name}" = "/usr" ]; then
770 zfs send -Lec -p -v "${_name}" | zfs receive ${_opt_nomount} -v -o canmount=off -x mountpoint "${_ds_target}${_relative_name}"
771 else
772 zfs send -Lec -p -v "${_name}" | zfs receive ${_opt_nomount} -v ${_opt_canmount} -x mountpoint "${_ds_target}${_relative_name}"
773 fi
774 fi
775 fi
776 done
777 }
778 # Need only the filesystem data (no associated snapshots)
779 echo "Destroying unneeded snapshots ..."
780 zfs destroy -rv "${_ds_target}@${_snapshot_name}"
692 } 781 }
693 782
694 783
695 # 784 #
696 # Global option handling 785 # Global option handling
744 command_populate_tmpl "$@" 833 command_populate_tmpl "$@"
745 ;; 834 ;;
746 snapshot-tmpl) 835 snapshot-tmpl)
747 command_snapshot_tmpl "$@" 836 command_snapshot_tmpl "$@"
748 ;; 837 ;;
838 copy-skel)
839 command_copy_skel "$@"
840 ;;
749 configure) 841 configure)
750 echo "ERROR: use \`fjail configure' instead" 1>&2; 842 echo "ERROR: use \`fjail configure' instead" 1>&2;
751 exit 2 843 exit 2
752 ;; 844 ;;
753 *) 845 *)