saphostagent_autoupdate.sh

#!/bin/bash
# ARG_OPTIONAL_SINGLE([host],[h],[Hostname. (Default: hostname command result.)])
# ARG_OPTIONAL_SINGLE([dir],[d],[Directory with hostagent executables.],['/usr/sap/hostctrl/exe/'])
# ARG_OPTIONAL_SINGLE([share],[s],[SAP shared directory.],['/export/SAP/software/saphostagent/'])
# ARG_OPTIONAL_SINGLE([delay],[e],[Autoupgrade delay in minutes.],[5])
# ARG_OPTIONAL_SINGLE([tmp],[t],[Temporary directory.],['/tmp/'])
# ARG_HELP([Configure autoupdate parameters for hostagent.],[Configure autoupdate parameters for hostagent.],[?],[])
# ARG_VERSION_AUTO([1.0])

export PS4='+(\D{%D %T} ${BASH_SOURCE}:${LINENO}): ${FUNCNAME[0]:+${FUNCNAME[0]}(): }'
set -euxo pipefail

### START OF CODE GENERATED BY Argbash v2.9.0 one line above ###
# Argbash is a bash code generator used to get arguments parsing right.
# Argbash is FREE SOFTWARE, see https://argbash.io for more info
# Generated online by https://argbash.io/generate

die() {
  local _ret="${2:-1}"
  test "${_PRINT_HELP:-no}" = yes && print_help >&2
  echo "$1" >&2
  exit "${_ret}"
}

begins_with_short_option() {
  local first_option all_short_options='hdset?v'
  first_option="${1:0:1}"
  test "$all_short_options" = "${all_short_options/$first_option/}" && return 1 || return 0
}

# THE DEFAULTS INITIALIZATION - OPTIONALS
_arg_host=$(hostname)
_arg_dir='/usr/sap/hostctrl/exe/'
_arg_share='/export/SAP/software/saphostagent/'
_arg_delay="5"
_arg_tmp='/tmp/'

print_help() {
  printf '%s\n' "Configure autoupdate parameters for hostagent."
  printf 'Usage: %s [-h|--host <arg>] [-d|--dir <arg>] [-s|--share <arg>] [-e|--delay <arg>] [-t|--tmp <arg>] [-?|--help] [-v|--version]\n' "$0"
  printf '\t%s\n' "-h, --host: Hostname. (Default: hostname command result.)"
  printf '\t%s\n' "-d, --dir: Directory with hostagent executables. (default: /usr/sap/hostctrl/exe/)"
  printf '\t%s\n' "-s, --share: SAP shared directory. (default: /export/SAP/software/saphostagent/)"
  printf '\t%s\n' "-e, --delay: Autoupgrade delay in minutes. (default: 5)"
  printf '\t%s\n' "-t, --tmp: Temporary directory. (default: /tmp/)"
  printf '\t%s\n' "-?, --help: Prints help"
  printf '\t%s\n' "-v, --version: Prints version"
  printf '\n%s\n' "Configure autoupdate parameters for hostagent."
}

parse_commandline() {
  while test $# -gt 0; do
    _key="$1"
    case "$_key" in
    -h | --host)
      test $# -lt 2 && die "Missing value for the optional argument '$_key'." 1
      _arg_host="$2"
      shift
      ;;
    --host=*)
      _arg_host="${_key##--host=}"
      ;;
    -h*)
      _arg_host="${_key##-h}"
      ;;
    -d | --dir)
      test $# -lt 2 && die "Missing value for the optional argument '$_key'." 1
      _arg_dir="$2"
      shift
      ;;
    --dir=*)
      _arg_dir="${_key##--dir=}"
      ;;
    -d*)
      _arg_dir="${_key##-d}"
      ;;
    -s | --share)
      test $# -lt 2 && die "Missing value for the optional argument '$_key'." 1
      _arg_share="$2"
      shift
      ;;
    --share=*)
      _arg_share="${_key##--share=}"
      ;;
    -s*)
      _arg_share="${_key##-s}"
      ;;
    -e | --delay)
      test $# -lt 2 && die "Missing value for the optional argument '$_key'." 1
      _arg_delay="$2"
      shift
      ;;
    --delay=*)
      _arg_delay="${_key##--delay=}"
      ;;
    -e*)
      _arg_delay="${_key##-e}"
      ;;
    -t | --tmp)
      test $# -lt 2 && die "Missing value for the optional argument '$_key'." 1
      _arg_tmp="$2"
      shift
      ;;
    --tmp=*)
      _arg_tmp="${_key##--tmp=}"
      ;;
    -t*)
      _arg_tmp="${_key##-t}"
      ;;
    -\? | --help)
      print_help
      exit 0
      ;;
    -\?*)
      print_help
      exit 0
      ;;
    -v | --version)
      printf '%s %s\n\n%s\n' "" "1.0" 'Configure autoupdate parameters for hostagent.'
      exit 0
      ;;
    -v*)
      printf '%s %s\n\n%s\n' "" "1.0" 'Configure autoupdate parameters for hostagent.'
      exit 0
      ;;
    *)
      _PRINT_HELP=yes die "FATAL ERROR: Got an unexpected argument '$1'" 1
      ;;
    esac
    shift
  done
}

parse_commandline "$@"

# OTHER STUFF GENERATED BY Argbash

### END OF CODE GENERATED BY Argbash (sortof) ### ])
# [ <-- needed because of Argbash

m_hostexec="${_arg_dir}saphostexec"
m_profile="${_arg_dir}host_profile"
m_autodir="${_arg_share}$(uname)/$(uname -p)"
m_link="${_arg_share}${_arg_host}"
m_entry_delay="hostexec/autoupgrade_delay = ${_arg_delay}"
m_entry_dirnew="DIR_NEW = ${m_link}"
m_flag_dirnew=0
m_flag_delay=0
m_uid_root="root"
m_uid_sapadm=20004
m_uid_sapsys=20000

# set unique string
m_epoch=$(date +"%s")
m_sfx=$(printf "%X\n" "${m_epoch}")
m_tmp="${_arg_tmp}host_profile.${m_sfx}"

# set-up autoupdate parameters in host_profile
while IFS= read -r M_LINE; do
  case "${M_LINE}" in
  DIR_NEW*)
    echo "${m_entry_dirnew}"
    m_flag_dirnew=1
    ;;
  hostexec/autoupgrade_delay*)
    echo "${m_entry_delay}"
    m_flag_delay=1
    ;;
  *)
    echo "${M_LINE}"
    ;;
  esac
done <"${m_profile}" >"${m_tmp}"

{
  if [[ ${m_flag_dirnew} == 0 ]]; then
    echo "${m_entry_dirnew}"
  fi
  if [[ ${m_flag_delay} == 0 ]]; then
    echo "${m_entry_delay}"
  fi
} >>"${m_tmp}"

ln -s -f "${m_autodir}" "${m_link}"
# The agreed upon user IDs for SAP users
# are not honored by all installs
# this causes also problems on shared
# filesystems therefore use numerical IDs
chown -h ${m_uid_sapadm}:${m_uid_sapsys} "${m_link}"

# switch to the new configuration
mv "${m_profile}" "${_arg_tmp}"
mv "${m_tmp}" "${m_profile}"
chown ${m_uid_root}:${m_uid_sapsys} "${m_profile}"
"${m_hostexec}" -restart pf="${m_profile}"