ipa-sss-rtr

#!/bin/bash

# This script comes with ABSOLUTELY NO WARRANTY, use at own risk
# Copyright (C) 2022 Osiris Alejandro Gomez <osiux@osiux.com>
# Copyright (C) 2022 Osiris Alejandro Gomez <osiris@gcoop.coop>
#
# 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
# the Free Software Foundation, either version 3 of the License, or
# any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.

BIN="$(basename "$0")"

function usage()
{
cat << EOF

## \`$BIN\` IPA SSSD restore cache files from backup

### Usage

\`\`\`bash

  $BIN [SSS_BAK]

\`\`\`

### Description

  Copy SSSD cache files in /var/lib/sss/db to preserve RAMDISK.

### Example

\`\`\`bash

  $BIN

\`\`\`

EOF
exit 0
}

[[ "$1" =~ ^[-]+(h|help) ]] && usage

[[ -n "$HOST"    ]] || HOST="$(hostname -s)"
[[ -n "$NOW"     ]] || NOW="$(date +%s)"
[[ -n "$SSS_BAK" ]] || SSS_BAK='/var/lib/ipa/backup/sss-db'
[[ -n "$SSS_DIR" ]] || SSS_DIR='/var/lib/sss/db'
[[ -n "$SYSLOG"  ]] || SYSLOG=0
[[ -z "$1"       ]] || SSS_BAK="$1"
[[ -n "$LAST"    ]] || LAST="$SSS_BAK/.$BIN"
[[ -n "$LDB_CHK" ]] || LDB_CHK='1'

function die ()
{
  log "$1" 'user.error'
  exit 1
}

function log ()
{
  local LEVEL='user.notice'
  [[ -z "$2"         ]] || LEVEL="$2"
  [[ "$SYSLOG" -eq 1 ]] && logger -p "$LEVEL" -t "$BIN" "$1"
  echo "$(date +'%F %T') $HOST $BIN: ${LEVEL//user./} $1"
}

function total_users()
{
  export LDB_DIR="$SSS_BAK"
  ipa-sss-ldb users | awk '{print $1}'
}

function total_groups()
{
  export LDB_DIR="$SSS_BAK"
  ipa-sss-ldb groups | awk '{print $1}'
}

pgrep ipa-sss-rsy 2>/dev/null && die "ABORT ipa-sss-rsy IS RUNNING"

SSS_MNT="$(mount | grep -o "$SSS_DIR")"

[[ "$SSS_DIR" = "$SSS_MNT" ]] || die "ABORT $SSS_DIR NOT MOUNTED"
[[ -d "$SSS_DIR" ]] || die "NOT FOUND DIRECTORY $SSS_DIR"
[[ -d "$SSS_BAK" ]] || die "NOT FOUND DIRECTORY $SSS_BAK"

if [[ "$LDB_CHK" -eq 1 ]]
then

  TOTAL_GROUPS="$(total_groups)"
  TOTAL_USERS="$(total_users)"

  # EXIT IMMEDIATELY IF A COMMAND EXITS WITH A NON-ZERO STATUS
  set -e
  [[ "$TOTAL_GROUPS" -eq 0 ]] && die "ABORT 0 GROUPS IN $LDB_DIR"
  [[ "$TOTAL_USERS"  -eq 0 ]] && die "ABORT 0 USERS $LDB_DIR"

fi

log "rsync $SSS_BAK $SSS_DIR"
rsync -a "$SSS_BAK/" "$SSS_DIR/"