#!/sbin/sh

#################################################################################################
#
#	Copyright (c) 1999-2003 by Sun Microsystems, Inc. All Rights Reserved.
#	Copyright 1992-95 AT&T Global Information Solutions
#
# ident "@(#)luname_to_id.sh 5.5     03/01/29 SMI"
#
# USAGE:        luname_to_id be_name
# FUNCTION:     Given a be_name, it returns the internal ID
# INPUT:        be_name - name of an existing BE
# OUTPUT:       The internal ID is written to stdout.
# NOTES:        If the be_name contains spaces, it MUST be in single quotes
#               (i.e. lumk_iconf "BE 3.00")
# DEV:          JKJ
#
# Note: performance testing has proven that "/sbin/sh" provides the best performance over
# /bin/sh and /bin/ksh.
#
#################################################################################################

LU_PROG_FULL_PATH="$0"
LU_PROG_NAME="`basename ${LU_PROG_FULL_PATH}`"; export LU_PROG_NAME

#################################################################################################
# Name:		usage
# Description:	output command line usage information; then call exit to terminate execution.
# Local Prefix:	<none>
# Arguments:	$1 = exit code for script ("" defaults to "1").
# Example:	usage 1
# Returns:	<none> 
#################################################################################################

usage()
{
  ${LUPRINTF} -p2 "`gettext 'USAGE: %s [ -X ] [ -l error_log ] [ -o outfile ] \
( [ -n ] BE_name )'`" "${LU_PROG_NAME}"
  ${LUPRINTF} -Wp2 "`gettext 'The BE_name should be enclosed in single quotes.'`"
  if [ -z "$1" ] ; then
    exit 1
  fi
  exit "$1"
}

#################################################################################################
# Name:		<main>
# Description:	Main code (outside of any function definitions) - executed at script startup.
# Local Prefix:	<none>
# Arguments:	$0...$n = All arguments specified by user on command line that invoked this script.
#################################################################################################

# Dot the defaults file.

if [ ! -s /etc/default/lu ] ; then
  echo "${LU_PROG_NAME}: ""`gettext 'ERROR: Live Upgrade not installed properly (/etc/default/lu not found).'`"
  exit 1
fi
. /etc/default/lu

# Default global variables we expect to be set from /etc/default/lu.

LUBIN=${LUBIN:=/usr/lib/lu}

# Dot the Live Upgrade library functions.

if [ ! -s $LUBIN/lulib ] ; then
  echo "${LU_PROG_NAME}: ""`gettext 'ERROR: The Live Upgrade product is not installed properly (${LUBIN}/lulib not found).'`"
  exit 1
fi

. $LUBIN/lulib

  ######################################################################################
  ##################### Command line option and argument processing ####################
  ######################################################################################

# Reset all command line parse flags to default values.
flag_o="" # -o f - output file path.
flag_l="" # -l f - log file path.
flag_n="" # -n "n" - be name.
flag_x="" # -x n - set debug level to n (PRIVATE).

while [ $# -ne 0 ] ; do
  while getopts l:n:o:x:X c
  do
    case $c in
      l) # -l f - error log file path.
	 # This overrides the LU_ERROR_LOG_FILE setting read from /etc/default/lu
	 lulib_cannot_duplicate_option "${flag_l}" "${OPTARG}" "-l"
	 ${LUPRINTF} -lp2D - "`gettext 'Verifying that the error log file <%s> specified can be created and appended to.'`" "${OPTARG}"
	 ERRMSG="`${LUPRINTF} -c \"${OPTARG}\" 2>&1`"
	 if [ $? -ne 0 ] ; then
	   [ -n "${ERRMSG}" ] && ${LUPRINTF} -elp2 '%s' "${ERRMSG}"
	   ${LUPRINTF} -Eelp2 "`gettext 'Argument <%s> to -l option may not be created or appended to.'`" "${OPTARG}"
	   exit 3
	 fi
	 flag_l="${OPTARG}"
	 lulib_set_error_log_file "${flag_l}"
	 ;;
      n) # -n "n" - be name.
	 lulib_cannot_duplicate_option "${flag_n}" "${OPTARG}" "-n"
	 flag_n="${OPTARG}"
	 ;;
      o) # -o f - output file path.
	 # This overrides the LU_SESSION_LOG_FILE setting read from /etc/default/lu
	 lulib_cannot_duplicate_option "${flag_o}" "${OPTARG}" "-o"
	 ${LUPRINTF} -lp2D -  "`gettext 'Verifying that the session log file <%s> can be created and appended to.'`" "${OPTARG}"
	 ERRMSG="`${LUPRINTF} -c \"${OPTARG}\" 2>&1`"
	 if [ $? -ne 0 ] ; then
	   [ -n "${ERRMSG}" ] && ${LUPRINTF} -elp2 '%s' "${ERRMSG}"
	   ${LUPRINTF} -Eelp2 "`gettext 'Argument <%s> to -o option may not be created or appended to'`" "${OPTARG}"
	   exit 3
	 fi
	 flag_o="${OPTARG}"
	 lulib_set_session_log_file "${flag_o}"
	 ;;
      x) # -x n - set debug level to n (PRIVATE).
	 # This overrides the default setting read from /etc/default/lu
	 lulib_cannot_duplicate_option "${flag_x}" "${OPTARG}" "-x"
	 /bin/test "${OPTARG}" -ge 0 2>/dev/null
	 if [ $? -gt 1 ] ; then
	   ${LUPRINTF} -Eelp2 "`gettext 'Argument <%s> to -x option is not a number.'`" "${OPTARG}"
	   usage 3
	 fi
	 flag_x="${OPTARG}"
	 lulib_set_debug "${flag_x}"
	 ;;
      X) # -X - set XML output mode.
	  lulib_set_output_format 'xml'
	  ;;
      \?) # unknown - option.
	  usage 3
    esac
  done

  # Found either end of arguments, +option, or non-option argument; shift out
  # what has been processed so far; if a non-option argument is present
  # capture it and continue processing the command line arguments.
  shift `/bin/expr $OPTIND - 1`
  OPTIND=1
  if [ $# -ne 0 -a "$1" = '+X' ] ; then
      # +X - set TEXT output mode.
      lulib_set_output_format 'text'
      shift
  else
    break
  fi
done

# Fixup debug, session log, and error log settings
lulib_fixup_startup_settings

  ######################################################################################
  ############ Validate all command line arguments and options as possible #############
  ######################################################################################

# Validate the number of arguments.
if [ $# -gt 1 ] ; then
  ${LUPRINTF} -Eelp2 "`gettext 'The boot environment name should be enclosed in single quotes, like %c%s%c.'`" "'" "$*" "'"
  usage 1
fi

# Name of target BE (ABE).
if [ -n "${flag_n}" -a -z "$1" ] ; then
  BE_NAME="${flag_n}"
elif [ -z "${flag_n}" -a -n "$1" ] ; then
  BE_NAME="$1"
elif [ -z "${flag_n}" -a -z "$1" ] ; then
  ${LUPRINTF} -Eelp2 "`gettext 'You must specify the BE to lookup either with the <-n> option or by providing the BE name on the command line.'`"
  usage 1
else
  ${LUPRINTF} -Eelp2 "`gettext 'You must specify the BE to lookup either with the <-n> option or by providing the BE name on the command line, but not both.'`"
  usage 1
fi

lulib_be_name_valid "${BE_NAME}"
if [ "$?" -ne "0" ] ; then
  ${LUPRINTF} -Eelp2 "`gettext 'Unable to retrieve i.d. for boot environment <%s>.'`" "${BE_NAME}"
  exit 1
fi

# Check for existence and non-zero size of lutab file.

if [ ! -f /etc/lutab -o ! -s /etc/lutab ] ; then
  ${LUPRINTF} -Eelp2 "`gettext 'No BEs are configured on this system.'`"
  exit 1
fi

# Translate be_name to ID (grep out of vfstab and take field 1)
#
BE_ID=`${LUETCBIN}/ludo get_be_id "${BE_NAME}" 2>&1`
if [ "$?" -ne "0" ] ; then
  ${LUPRINTF} -Eelp2 '%s' "${BE_ID}"
  ${LUPRINTF} -Eelp2 "`gettext 'The boot environment <%s> could not be found.'`" "${BE_NAME}"
  exit 2
fi
if [ -z "${BE_ID}" ] ; then
  ${LUPRINTF} -Eelp2 "`gettext 'The boot environment <%s> could not be found.'`" "${BE_NAME}"
  exit 2
fi

# Success.
${LUPRINTF} -lp2D - "`gettext 'BE ID for current boot environment <%s> is <%s>.'`" "${BE_NAME}" "${BE_ID}"
echo $BE_ID
exit 0