#!/bin/bash
#
# backup-script system for cloning systems using rsync
-# Copyright (c)2008-201
6 Alexander Barton <alex@barton.de>
+# Copyright (c)2008-201
7 Alexander Barton <alex@barton.de>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
default_tags=""
Usage() {
- echo "Usage: $NAME [<options>] [<job> [<job> [...]]]"
- echo
- echo " -n, --dry-run Test run only, don't copy any data."
- echo " -p, --progress Show progress, see rsync(1)."
- echo " -t TAG, --tag TAG Only run jobs with tag TAG."
- echo " -x, --no-exec Don't run global pre-/post-exec commands."
- echo
- echo "When no <job> is given, all defined systems are used."
- echo
- # shellcheck disable=SC2086
- echo -e $config_info
- echo
+ {
+ echo "Usage: $NAME [<options>] [<job> [<job> [...]]]"
+ echo
+ echo " -n, --dry-run Test run only, don't copy any data."
+ echo " -p, --progress Show progress, see rsync(1)."
+ echo " -t TAG, --tag TAG Only run jobs with tag TAG."
+ echo " -x, --no-exec Don't run global pre-/post-exec commands."
+ echo
+ echo "When no <job> is given, all defined systems are used."
+ echo
+ # shellcheck disable=SC2086
+ echo -e $config_info
+ echo
+ } >&2
exit 2
}
+ErrorMsg () {
+ printf "%s\n" "$@" >&2
+}
+
CleanUp() {
if [[ -n "$pre_exec" && $PREPOSTEXEC -ne 0 ]]; then
echo "Executing \"$post_exec\" ..."
if ! sh -c $post_exec; then
- echo "Warning: post-exec command failed!"
+ ErrorMsg "Warning: post-exec command failed!"
fi
echo
fi
GotSignal() {
echo
- echo "--> Got signal, cleaning up & aborting ..."
+ ErrorMsg "--> Got signal, cleaning up & aborting ..."
echo
CleanUp
- echo -n "Aborted: "; date
+ ErrorMsg -n "Aborted: " >&2; date
echo
sleep 3
exit 9
echo " *** Trial run, not executing ${what}-exec command!"
ret=0
fi
- [ $ret -eq 0 ] \
- && echo "The ${what}-exec command completed with status 0, OK." \
- || echo "The ${what}-exec command completed with ERRORS, code $ret!"
+ if [ $ret -eq 0 ]; then
+ echo "The ${what}-exec command completed with status 0, OK."
+ else
+ ErrorMsg "The ${what}-exec command completed with ERRORS, code $ret!"
+ fi
return $ret
}
zfs create "$(echo "$volume" | cut -c2-)" || return 1
;;
*)
- echo "CreateSubvolume: Incompatible FS type \"$fs\" on \"$dir\"!"
+ ErrorMsg "CreateSubvolume: Incompatible FS type \"$fs\" on \"$dir\"!"
return 9
esac
return 0
"$(dirname "$volume")/$link_name"
;;
*)
- echo "CloneSubvolume: Incompatible FS type \"$fs\" on \"$source\"!"
+ ErrorMsg "CloneSubvolume: Incompatible FS type \"$fs\" on \"$source\"!"
return 9
esac
return 0
|| return 1
;;
*)
- echo "RenameSubvolume: Incompatible FS type \"$fs\" on \"$source\"!"
+ ErrorMsg "RenameSubvolume: Incompatible FS type \"$fs\" on \"$source\"!"
return 9
esac
return 0
[ -h "$volume" ] && rm "$volume"
;;
*)
- echo "DeleteSubvolume: Incompatible FS type \"$fs\" on \"$volume\"!"
+ ErrorMsg "DeleteSubvolume: Incompatible FS type \"$fs\" on \"$volume\"!"
return 9
esac
return 0
last=$(ls -1d "$sys_target"/[0-9]* 2>/dev/null | sort -r | head -n1)
if [ -n "$last" ]; then
if [ ! -d "$last" ]; then
- echo "Last snapshot \"$last\" seems not to be a directory!? \"$system\" skipped!"
+ ErrorMsg "Last snapshot \"$last\" seems not to be a directory!? \"$system\" skipped!"
echo
return 1
fi
sys_target="$sys_target/current"
;;
*)
- echo "Initialize_Last_SysTarget_Snapshot: Incompatible FS type \"$fs\" on \"$sys_target\"!"
+ ErrorMsg "Initialize_Last_SysTarget_Snapshot: Incompatible FS type \"$fs\" on \"$sys_target\"!"
return 1
esac
return 0
# Check rsync and its protocol version
if ! rsync=$(which "rsync" 2>/dev/null); then
- echo "Failed to detect rsync(1)! Is it installed in your \$PATH?"
+ ErrorMsg "Failed to detect rsync(1)! Is it installed in your \$PATH?"
exit 1
fi
if ! rsync_proto=$($rsync --version 2>/dev/null | head -n 1 | sed 's/.* protocol version \([0-9]*\)$/\1/'); then
- echo "Failed to detect protocol version of $rsync!"
+ ErrorMsg "Failed to detect protocol version of $rsync!"
exit 1
fi
echo "Rsync command is $rsync, protocol version $rsync_proto."
if [ $# -ge 1 ]; then
for s in "$@"; do
if [ ! -r "${conf_d}/$s" ]; then
- echo "$NAME: Can' read \"${conf_d}/$s\"!"
+ ErrorMsg "$NAME: Can' read \"${conf_d}/$s\"!"
exit 3
fi
sys+=("${conf_d}/$s")
if [[ -n "$setup_exec" && $PREPOSTEXEC -ne 0 ]]; then
echo "Executing \"$setup_exec\" ..."
if ! sh -c $setup_exec; then
- echo "Error: setup command failed!"; echo
- echo "Aborting backup."; echo
+ ErrorMsg "Error: setup command failed!"; echo
+ ErrorMsg "Aborting backup."; echo
exit 5
fi
sleep 2
# check and create PID file
if [ -e "$PIDFILE" ]; then
- echo "Lockfile \"$PIDFILE\" already exists."
- echo "Is an other instance still running?"
+ ErrorMsg "Lockfile \"$PIDFILE\" already exists."
+ ErrorMsg "Is an other instance still running?"
echo
- echo -n "Aborted: "; date
+ ErrorMsg -n "Aborted: " >&2; date
echo
exit 4
fi
if ! touch "$PIDFILE" 2>/dev/null; then
- echo "Warning: can't create PID file \"$PIDFILE\"!"
+ ErrorMsg "Warning: can't create PID file \"$PIDFILE\"!"
echo
else
echo "$$" >>"$PIDFILE"
if [[ -n "$pre_exec" && $PREPOSTEXEC -ne 0 ]]; then
echo "Executing \"$pre_exec\" ..."
if ! sh -c $pre_exec; then
- echo "Error: pre-exec command failed!"; echo
+ ErrorMsg "Error: pre-exec command failed!"; echo
CleanUp
- echo "Aborting backup."; echo
+ ErrorMsg "Aborting backup."; echo
exit 5
fi
sleep 2
# Check target directory
if [ -z "$target" ]; then
- echo "No target directory specified for \"$system\"!? Skipped!"
+ ErrorMsg "No target directory specified for \"$system\"!? Skipped!"
echo; continue
fi
if [ ! -d "$target" ]; then
- echo "Target \"$target\" is not a directory!? \"$system\" skipped!"
+ ErrorMsg "Target \"$target\" is not a directory!? \"$system\" skipped!"
echo; continue
fi
mkdir -p "$sys_target"; r=$?
fi
if [ $r -ne 0 ]; then
- echo "Can't create \"$sys_target\"!? \"$system\" skipped!"
+ ErrorMsg "Can't create \"$sys_target\"!? \"$system\" skipped!"
echo; continue
fi
fi
if [[ "$local" -eq 0 && "$ping" -ne 0 ]]; then
# Check if system is alive
if ! ping -c 1 "$system" >/dev/null 2>&1; then
- echo "Host \"$system\" seems not to be alive!? Skipped."
+ ErrorMsg "Host \"$system\" seems not to be alive!? Skipped."
echo; continue
fi
echo "OK, host \"$system\" seems to be alive."
if [ -e "$sys_target/.stamp" ]; then
# There seems to be a genearation-less backup in the
# target directory!
- echo "Target directory \"$sys_target\" seems to be unclean!? \"$system\" skipped!"
+ ErrorMsg "Target directory \"$sys_target\" seems to be unclean!? \"$system\" skipped!"
echo; continue
fi
echo "Found incomplete snapshot in \"$last\", reusing and renaming it ..."
if [ "$DRYRUN" -eq 0 ]; then
if ! RenameSubvolume "$last" "$sys_target"; then
- echo "Failed to rename last snapshot \"$last\" to \"$sys_target\"!? \"$system\" skipped!"
+ ErrorMsg "Failed to rename last snapshot \"$last\" to \"$sys_target\"!? \"$system\" skipped!"
echo; continue
fi
else
if [ "$DRYRUN" -eq 0 ]; then
CloneSubvolume "$last" "$sys_target" "$snapshot"; r=$?
if [ $r -ne 0 ]; then
- echo "Can't create snapshot \"$snapshot\" of \"$last\", code $r!? \"$system\" skipped!"
+ ErrorMsg "Can't create snapshot \"$snapshot\" of \"$last\", code $r!? \"$system\" skipped!"
echo; continue
fi
echo "Created new snapshot in \"$snapshot\"."
if [ "$DRYRUN" -eq 0 ]; then
CreateSubvolume "$sys_target"; r=$?
if [ $r -ne 0 ]; then
- echo "Can't create subvolume \"$sys_target\", code $r!? \"$system\" skipped!"
+ ErrorMsg "Can't create subvolume \"$sys_target\", code $r!? \"$system\" skipped!"
echo; continue
fi
echo "Created new subvolume in \"$sys_target\"."
ExecJob pre "$job_pre_exec" ; ret=$?
if [ $ret -ne 0 ]; then
[ $ret -ne 99 ] && count_started=$count_started+1
- echo "Pre-exec command failed, \"$system\" skipped!"
+ ErrorMsg "Pre-exec command failed, \"$system\" skipped!"
echo; continue
fi
fi
cmd="$cmd ${user}@${system}:$file $sys_target/"
done
else
- echo "Backup type \"$backup_type\" undefined, \"$system\" skipped!"
+ ErrorMsg "Backup type \"$backup_type\" undefined, \"$system\" skipped!"
echo; continue
fi
fi
if [ $ret -eq 20 ]; then
- echo "Backup of \"$system\" interrupted. Aborting ..."
+ ErrorMsg "Backup of \"$system\" interrupted. Aborting ..."
GotSignal
fi
[ "$DRYRUN" -gt 0 ] || count_ok=$count_ok+1
ok=1
else
- echo "System \"$system\" completed with ERRORS, code $ret!"
+ ErrorMsg "System \"$system\" completed with ERRORS, code $ret!"
fi
# execute job "post-exec" command, if any
for delete in $to_delete; do
dir="$sys_root/$delete"
if [ ! -e "$dir/.stamp" ]; then
- echo "Not deleting \"$dir\", not a backup directory!?"
+ ErrorMsg "Not deleting \"$dir\" of \"$system\", not a backup directory!?"
continue
fi
last=$(stat "$dir/.stamp" 2>/dev/null | grep "^Modify: " \
echo "Removing backup from" $last "..."
if [ "$DRYRUN" -eq 0 ]; then
DeleteSubvolume "$dir" \
- || echo "Failed to delete \"$dir\"!"
+ || ErrorMsg "Failed to delete \"$dir\" of \"$system\"!"
fi
done
echo -n "Clean up finished: "; date
elif [ -n "$to_delete" ]; then
- echo "There have been errors, not cleaning up old generations!"
+ ErrorMsg "There have been errors for \"$system\", not cleaning up old generations!"
else
echo "Nothing to clean up (keep up to $generations generations)."
fi
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