#!/sbin/sh

#################################################################################################
#
#	Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
#	Use is subject to license terms.
#
#	Copyright 1992-95 AT&T Global Information Solutions
#
#ident	"@(#)lucomm_del.sh	5.6	08/06/25 SMI"
#
# USAGE:        lucomm_del file
# FUNCTION:     strips lines containing comments at the begining, blank lines, and lines
#	 	containing only white space (spaces and/or tabs) from a text file.
# INPUT:        file
# OUTPUT:       the output is written to the stdout
# DEV:          JKJ
#
#################################################################################################

usage()
{
  [ -n "$1" ] && echo "$1" >&2
  echo "`gettext 'USAGE: '`""lucomm_del""`gettext '[file]'`" >& 2
  exit 1
}

# Because this program is used heavily and its function is so simple
# it bypasses all of the "standard" live upgrade library and default
# value loading. It can issue error messages but does so by
# redirecting echo to stderr.

[ "$#" -gt '1' ] && usage

[ -n "$1" -a -f "$1" -a -r "$1" ] && exec /bin/sed -e '/^[	 ]*$/d' -e '/^#.*/d' < $1

[ -z "$1" ] && exec /bin/sed -e '/^[	 ]*$/d' -e '/^#.*/d'

# file specified but not found or not readable.
[ ! -f "$1" ] && usage "`gettext 'ERROR: file does not exist or is not an ordinary file: '`$1"

usage "`gettext 'ERROR: file cannot be read: '`$1"