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GitHub Repository: att/ast
 Path: blob/master/src/cmd/ksh93/tests/grep.sh
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########################################################################

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#                                                                      #

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#               This software is part of the ast package               #

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#          Copyright (c) 1982-2011 AT&T Intellectual Property          #

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#                      and is licensed under the                       #

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#                 Eclipse Public License, Version 1.0                  #

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#                    by AT&T Intellectual Property                     #

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#                                                                      #

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#                A copy of the License is available at                 #

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#          http://www.eclipse.org/org/documents/epl-v10.html           #

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#         (with md5 checksum b35adb5213ca9657e911e9befb180842)         #

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#                                                                      #

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#              Information and Software Systems Research               #

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#                            AT&T Research                             #

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#                           Florham Park NJ                            #

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#                                                                      #

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#                  David Korn <[email protected]>                   #

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#                                                                      #

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########################################################################

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function err_exit

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{

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	print -u2 -n "\t"

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	print -u2 -r ${Command}[$1]: "${@:2}"

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	let Errors+=1

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}

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alias err_exit='err_exit $LINENO'

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Command=${0##*/}

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integer Errors=0

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tmp=$(mktemp -dt) || { err_exit mktemp -dt failed; exit 1; }

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trap "cd /; rm -rf $tmp" EXIT

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function grep

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{

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	#

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	#	SHELL VERSION OF GREP

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	#

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	vflag= xflag= cflag= lflag= nflag=

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	set -f

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	while	((1))				# look for grep options

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	do	case	"$1" in

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		-v*)	vflag=1;;

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		-x*)	xflag=1;;

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		-c*)	cflag=1;;

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		-l*)	lflag=1;;

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		-n*)	nflag=1;;

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		-b*)	print 'b option not supported';;

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		-e*)	shift;expr="$1";;

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		-f*)	shift;expr=$(< $1);;

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		-*)	print $0: 'unknown flag';return 2;;

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		*)

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			if	test "$expr" = ''

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			then	expr="$1";shift

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			fi

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			test "$xflag" || expr="*${expr}*"

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			break;;

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		esac

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		shift				# next argument

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	done

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	noprint=$vflag$cflag$lflag		# don't print if these flags are set

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	integer n=0 c=0 tc=0 nargs=$#		# initialize counters

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	for i in "$@"				# go thru the files

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	do	if	((nargs<=1))

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		then	fname=''

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		else	fname="$i":

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		fi

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		test "$i"  &&  exec 0< $i	# open file if necessary

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		while	read -r line		# read in a line

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		do	let n=n+1

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			case	"$line" in

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			$expr)			# line matches pattern

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				test "$noprint" || print -r -- "$fname${nflag:+$n:}$line"

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				let c=c+1 ;;

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			*)			# not a match

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				if	test "$vflag"

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				then	print -r -- "$fname${nflag:+$n:}$line"

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				fi;;

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			esac

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		done

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		if	test "$lflag" && ((c))

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		then	print -r -- "$i"

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		fi

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		let tc=tc+c n=0 c=0

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	done

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	test "$cflag" && print $tc		#  print count if cflag is set

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	let tc					#  set the return value

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}

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cat > $tmp/grep <<\!

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this is a food bar test

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to see how many lines find both foo and bar.

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Some line contain foo only,

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and some lines contain bar only.

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However, many lines contain both foo and also bar.

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A line containing foobar should also be counted.

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There should be six lines with foo and bar.

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There are only two line with out foo but with bar.

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!

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if	(( $(grep -c 'foo*bar' $tmp/grep ) != 6))

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then	err_exit

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fi

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exit $((Errors<125?Errors:125))

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