194 lines
6.4 KiB
Plaintext
194 lines
6.4 KiB
Plaintext
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#!/bin/bash
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# -*- coding: utf-8 mode: sh -*- vim:sw=4:sts=4:et:ai:si:sta:fenc=utf-8
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function display_help() {
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uecho "$scriptname: faire une sauvegarde des fichiers
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USAGE
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$scriptname [options]
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OPTIONS
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-l Lister les profils de sauvegarde disponibles.
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-p Spécifier le profil de sauvegarde à effectuer. Par défaut, toutes les
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sauvegardes sont effectuées.
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-u USER
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Faire le sauvegarde pour l'utilisateur \$USER. Cette option n'est valide
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que pour l'utilisateur root.
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-n Afficher ce qui doit être fait plutôt que de le faire
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-H Arrêter la machine après une sauvegarde REUSSIE."
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}
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source "$(dirname "$0")/ulib/ulib" &&
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urequire DEFAULTS ||
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exit 1
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action=getargs
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profile=
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HOMEDIR="$HOME"
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fake_maybe=
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halt=
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lockfile="$TMPDIR/ubackup.lock"
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parse_opts "${PRETTYOPTS[@]}" \
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--help '$exit_with display_help' \
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-l,--list action=list \
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-p:,--profile: profile= \
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-u:,--user: user= \
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-n,--fake fake_maybe=echo \
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-H,--halt halt=1 \
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--backup action=backup \
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--lockfile: lockfile= \
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@ args -- "$@" && set -- "${args[@]}" || die "$args"
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if [ -n "$user" ]; then
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if is_root; then
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eval "HOMEDIR=~$user"
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else
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die "L'option -u n'est supportée que pour l'utilisateur root"
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fi
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fi
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function __set_defaults() {
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local HOME="$HOMEDIR"
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set_defaults ubackup
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}
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__set_defaults
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if [ "$action" == "list" ]; then
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echo "${BACKUPS[*]}"
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exit 0
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elif [ "$action" == "getargs" ]; then
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# mettre un verrou pour empêcher les opérations de sauvegarde simultanées
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if [ -f "$lockfile" ]; then
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if [ "$(<"$lockfile")" != "$$" ]; then
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die "Une sauvegarde est en cours. Impossible de continuer.
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Si ce message est erroné, supprimez manuellement $lockfile"
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fi
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fi
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# n'installer le trap de cleanup qu'après avoir testé qu'une sauvegarde n'était pas en cours.
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autoclean "$lockfile"
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echo "$$" >"$lockfile"
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# arguments pour la sauvegarde
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args=()
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if [ -n "$profile" ]; then
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backups=("$profile")
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else
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backups=("${BACKUPS[@]}")
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fi
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for backup in "${backups[@]}"; do
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if [ "$backup" == "DEFAULT" ]; then
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backup=
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fi
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destdir="${backup:+${backup}_}DESTDIR"; destdir="${!destdir}"
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vgname="${backup:+${backup}_}VGNAME"; vgname="${!vgname}"
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lvname="${backup:+${backup}_}LVNAME"; lvname="${!lvname}"
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configdir="${backup:+${backup}_}CONFIGDIR"; configdir="${!configdir:-$HOMEDIR/etc}"
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includes="${backup:+${backup}_}INCLUDES"; includes="${!includes}"
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excludes="${backup:+${backup}_}EXCLUDES"; excludes="${!excludes}"
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script="${backup:+${backup}_}SCRIPT"; script="${!script}"
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mount="${backup:+${backup}_}MOUNT"; mount="${!mount:-$scriptdir/lib/backup.mount}"
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umount="${backup:+${backup}_}UMOUNT"; umount="${!umount:-$scriptdir/lib/backup.umount}"
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destdir="$(abspath "$destdir" "$configdir")"
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[ -d "$destdir" ] || die "$destdir: répertoire de sauvegarde inexistant"
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configdir="$(abspath "$configdir")"
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[ -n "$includes" ] && includes="$(abspath "$includes" "$configdir")"
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[ -f "$includes" ] || die "$(ppath "$includes"): liste des fichiers à inclure inexistante"
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[ -n "$excludes" ] && excludes="$(abspath "$excludes" "$configdir")"
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[ -n "$script" ] && script="$(abspath "$script" "$configdir")"
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[ -n "$mount" ] && mount="$(abspath "$mount" "$configdir")"
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[ -n "$umount" ] && umount="$(abspath "$umount" "$configdir")"
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args=("${args[@]}" "$backup" "$destdir" "$vgname" "$lvname" "$includes" "$excludes" "$script" "$mount" "$umount")
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done
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# ce script doit tourner en root
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if is_root; then
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action=backup
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set -- "${args[@]}"
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else
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run_as_root --backup --lockfile "$lockfile" ${halt:+-H }${fake_maybe:+-n }"${args[@]}"
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fi
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fi
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if [ "$action" == "backup" ]; then
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no_error=1
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function err_result() {
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shift # STATUS
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eerror "$*"
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no_error=
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}
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while [ -n "$*" ]; do
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backup_name="$1"; shift
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backup_destdir="$1"; shift
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backup_vgname="$1"; shift
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backup_lvname="$1"; shift
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backup_includes="$1"; shift
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backup_excludes="$1"; shift
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backup_script="$1"; shift
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backup_mount="$1"; shift
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backup_umount="$1"; shift
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etitle "${backup_name:-DEFAULT}"
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result="$("$backup_mount" "$backup_destdir" "$backup_vgname" "$backup_lvname")"
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if [ $? -ne 0 ]; then
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err_result $result
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else
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suffix="${backup_name:+-$backup_name}"
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last="last$suffix"
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destdir="$backup_destdir"
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mkdir -p "$destdir"
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# calculer les répertoires de destination et ceux à supprimer
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eval "$("$scriptdir/plbck" -S "$suffix" -e "$destdir")"
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# sauvegarder
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etitle -s "Sauvegarde dans $CURRENT${PREVIOUS:+ depuis $PREVIOUS}"
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error=
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if $fake_maybe rsync -aHAX --delete ${PREVIOUS:+--link-dest="$PREVIOUS"} \
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${backup_excludes:+--delete-excluded --exclude-from="$backup_excludes"} \
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--include-from="$backup_includes" \
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/ "$CURRENT"; then
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cwd="$(pwd)"
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cd "$destdir"
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[ -L "$last" ] && $fake_maybe /bin/rm -f "$last"
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$fake_maybe ln -s "$(basename "$CURRENT")" "$last"
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cd "$cwd"
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[ -n "$backup_commands" ] && $fake_maybe source "$backup_commands"
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else
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err_result 1 "Une erreur s'est produite pendant la sauvegarde. Arrêt des opération pour $backup_name"
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error=1
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fi
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eend
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# supprimer
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if [ -z "$error" -a -n "${DELETES[*]}" ]; then
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etitle -s "Suppression des anciennes versions"
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for delete in "${DELETES[@]}"; do
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estep "$delete"
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$fake_maybe rm_maybe -rf "$delete"
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done
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eend
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fi
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# démonter le répertoire
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result="$("$backup_umount" $result)"
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if [ $? -ne 0 ]; then
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err_result $result
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fi
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fi
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done
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rm "$lockfile"
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if [ -n "$no_error" -a -n "$halt" ]; then
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$fake_maybe /sbin/shutdown -h now
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fi
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else
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die "Action inconnue: $action"
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fi
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