#!/bin/bash
# Script ---------------------------------------------------------------------
# Program   : hfind.sh
# Author    : Jay Fink <jay.fink@gmail.com>
# Purpose   : Use a best guess to track down header files.
#             Really primitive - could probably be better but it works.
#
# $Author: jayrfink $
# $Date: 2007/08/28 00:14:42 $
# $State: Exp $
#-----------------------------------------------------------------------------
program=${0##*/}
toppid=$$
ldpaths="/usr/include /usr/local/include /opt /usr"
passmax=4

trap "exit 1" 1 2 3 15

#-----------------------------------------------------------------------------
# bomb - Simple death routine; display ERRORMESSAGE, kill toppid and exit.
#
# requires: ERRORMESSAGE
# returns : exit 1
#-----------------------------------------------------------------------------
bomb()
{
	cat >&2 <<ERRORMESSAGE

ERROR: $@
*** ${program} aborted ***
ERRORMESSAGE
	kill ${toppid}      # in case we were invoked from a subshell
	exit 1
}

#-----------------------------------------------------------------------------
# search - Search $ldpaths
#
# requires: Npass
# returns : $?
#-----------------------------------------------------------------------------
search()
{
	pass=$1
	file=$2

	cnt=0

	for pth in ${ldpaths} ; do
		cnt=$(($cnt+1))
		if [ "$verbose" -gt "0" ]; then
			echo "Searching for ${file} in ${pth}"
		fi

		find $pth -type f -name $file
		if [ "$cnt" -eq "$pass" ]; then
			break;
		elif [ "$cnt" -eq "$passmax" ]; then
			echo "Search exhuasted"
			exit 0
		fi

	done

	return $?
}

#-----------------------------------------------------------------------------
# usage - simple usage print
#-----------------------------------------------------------------------------
usage()
{
	cat <<_usage_
Usage: ${program} [option arg][option]
Usage: ${program} [-f filename][-p passes] [-u]
Passes: Number of different paths to try and pass through.
_usage_
}

#-----------------------------------------------------------------------------
# showpaths - print all  of the currently searched paths
#-----------------------------------------------------------------------------
showpaths()
{
	echo "Current paths searched (in order):"
	for pth in ${ldpaths} ; do
		echo ${pth}
	done
	echo "Modify the \$ldpaths variable at the top of the script if you like"
}

#-----------------------------------------------------------------------------
# Main
#-----------------------------------------------------------------------------
passes=1
verbose=0
while [ "$#" -gt "0" ]
do
	opt="${1//-}"
	opt=$(echo "${opt}" | cut -c 1 2>/dev/null)
	case $opt in
		f) shift;filename=$1;;
		p) shift;passes=$1;;
		s) showpaths;exit 0;;
		u) usage;exit 0;;
		v) verbose=1;;
		*) usage;exit1;;
	esac
	shift
done

if [ ! $filename ]; then
	echo "Error: No filename specified"
	usage
	exit 1
fi

search $passes $filename