Shell CD recording Application

From the "Linnux program design," the second chapter, from one by one to knock out, the conclusion is that a few s did not come out effect

#。 /bin/sh and #. There's a difference,/bin/bash.

The first direct typing is the former, always output some-E, indicating that do not understand

#!/bin/bash # Very Simple example shell script for managing a CD collection # Copyright (C) 1996-2007 Wiley Publishing in C menu_choice= "" Current_cd= "" title_file= "title_cdb" tracks_file= "tracks.cdb" temp_file=/tmp/cdb.$$ trap ' rm-f $tmp _ File ' EXIT Get_return () {ECHO-E "press RETURN \c" read x return 0} get_confirm () {ECHO-E "Are do you sure?" \c "While true does read x case" $x "in Y | Yes | Y | Yes |
		 YES) return 0;; n | No | N | NO |
		 No) echo echo "Canceled" return 1;;
		*) echo "Please enter Yes or no";; Esac done} set_menu_choice () {Clear echo ' options:-"echo Echo" a) Add new CD "echo" f) Find CD "echo" C cou NT the CDs and tracks in the catalog "if [" $cdcatnum "!="];
	Then echo "L" List tracks on $cdtitle "echo" r) Remove $cdtitle "echo" u) update track information for $cdtitle " Fi echo "Q" QUIT "echo echo-e" Please enter choice then press RETURN \c "read Menu_choice return} insert_title () {echo $* >&Gt $title _file return} insert_track () {echo $* >> $tracks _file return} add_record_tracks () {echo "Enter track I nformation for this CD ' echo ' When no more tracks enter Q ' cdtrack=1 cdttitle= ' while [' $cdttitle '!= ' Q '] do EC Ho-e "Track $cdtrack, Track title?
		\c "read tmp cdttitle=${tmp%%,*} if [$tmp"!= "$cdttitle"];then echo "sorry,no command allowed" continue; fi if [-N "$cdttitle"]; Then if ["$cdttitle"!= "Q"]; 
	 Then Insert_track $cdcatnum, $cdtrack, $cdttitle fi Else cdtrack=$ ((cdtrack-1)) fi cdtrack=$ ((cdtrack+1)) Done} add_records () {# Prompt for the initial information echo-e ' Enter catalog name \c ' Read TMP Cdcatnum=${tm
	
	p%%,*} echo-e "Enter title \c" Read tmp cdtitle=${tmp%%,*} echo-e "Enter type \c" read tmp cdtype=${tmp%%,*}  Echo-e "Enter Artist/composer \c" read tmp cdac=${tmp%%,*} # Check that they want to Enter the information echo About to add new entry echo "$cdcatnum $cdtitle $cdtype $CDAC "# If confirmed the appen it to the titles file if get_confirm; Then Insert_title $cdcatnum, $cdtitle, $cdtype, $cdac add_record_tracks else remove_records fi return} FIND_CD () {if ["$" = "n"];then asklist=n else asklist=y fi cacatnum= "Echo-e" Enter a string to search for the CD
	
	Title \c "Read Searchstr if [" $searchstr "=" "];then return 0 fi grep" $searchstr "$title _file > $temp _file
		Set $ (wc-l $temp _file) linesfound=$1 case ' $linesfound ' in 0) echo ' Sorry, nothing found ' get_return return 0
	;;
	1);; 2) echo "Sorry,not unique" echo "found the following" cat $temp _file get_return retrun 0 esac ifs= "," read CD Catnum cdtitle Cdtype Cdac < $temp _file ifs= "" If [-Z "$cdcatnum"];then echo "sorry.could not exact catalog field from $temp _file "Get_return return 0 fi echo Catalog number $cdcatnum echo Title: $cdtitle echo Type : $cdtype echo Artist/composer: $cdac
	echo Get_return If ["$asklist" = "Y"]; Then ECHO-E "View tracks for this CD? \c" Read x if ["$x" = "y"];then echo list_tracks echo fi fi r Eturn-1} update_cd () {If [-Z "$cdcatnum"]; then echo "You must select a CD-i" Find_cd n FI-if [ñ "$cdcat Num "];  Then echo "Current tracks are:-" list_tracks echo echo "This'll re-enter the tracks for $cdtitle" Get_confirm && {grep-v "^${cdcatnum}," $tracks _file > $temp _file mv $temp _file $tracks _file Echo add_record_
	Tracks} Fi return} Count_cds () {set $ (wc-l $title _file) num_titles=$1 set $ (wc-l $tracks _file) num_tracks=$1 Echo found $num _titles cds,with A total of $num _tracks tracks Get_return return} remove_records () {if [-z] $cdcatnu M "]; Then echo you must Select a CD-i find_cd n fi if [-N "$cdcatnum"]; Then echo "You are about to delete $cdtitle" get_confirm && {grep-v "^s{cdcatnum}," $title _file > $tem P_fiLe MV $temp _file $title _file grep-v "^${cdcatnum}," $tracks _file > $temp _file mv $temp _file $tracks _file C Dcatnum= "" "Echo Entry removed} get_retrun fi return} list_tracks () {if [" $cdcatnum "="]; Then echo no CD selected yet return else grep "^${cdcatnum}," $tracks _file > $temp _file num_tracks=$ (wc-l $te Mp_file) If ["$num _tracks" = "0"]; Then echo no tracks found for $cdtitle else {echo echo $cdtitle:-"echo cut-f 2-D, $temp _file EC HO} | ${pager:-more} fi fi Get_return return} rm-f $temp _file if [!-F $title _file];then touch $title _file fi if [ ! -F $tracks _file];then touch $tracks _file fi * Now application proper clear echo echo "Mini CD Manager" sleep
1 quit=n while ["$quit"!= "Y"];
		Do set_menu_choice case "$menu _choice" in a) add_records;;
		R) Remove_records;;
		f) find_cd_y;;
		u) update_cd;;
		c) Count_cds;;
		l) list_tracks;;
		b) echo more $title _file Echo	Get_return;; Q |
		Q) quit=y;;
	*) echo "Sorry.choice not recognized";;






















 Esac #Tidy up and leave rm-f $temp _file echo "finished" Exit 0