ask_part

<B>Digital的Unix操作系统VAX 4.2源码</B>

#!/bin/sh
#
# @(#)ask_part	4.2	(ULTRIX)	9/4/90
#
# Usage: sh ask_part $1 $2 $3 $4
#   	  	$1: validpart
#		$2: /usr, or /usesr, or swap, or dump
#		$3: special file /dev/ra?
#		$4: default partition.
#
# Description: Due to the ask_filesys needs to ask 4 times some type question,
#		this shell wrote for a called routine.
#
# 001 - Aug 31, 1990 - Jon Wallace
#	Put in fix to remove embedded spaces when doing a "read".
#
# 000 - June, 1986 - by Tung-Ning Cherng created.
#
#	Edited prompts on Aug. 4, 1986 by Al Wojtas
#

default="no default"
for i in $1
do
	case $i in
	$4 ) default=$4
	     break 
		;;
	esac
done

while : true
do
	echo -n " 
The disk ${3} you selected from the previous table has the following 
partitions available, on which you can allocate the ${2}:

partition      size (Kbytes)  overlap
------------------------------------------------
$1	
------------------------------------------------ 

Type the letter of the partition on which you want
to allocate the ${2} [$default]: " 1>&2
	read ans
	ans=`echo $ans`
	case $ans in
	"" )
		ans=$default ;;
	esac
	found=n
	for i in $1
	do
		case $i in
		[abcdefgh] )
			case $i in
			$ans )
				found=y 
				break
				;;
			esac
			;;
		esac
	done
	case $found in
	y )
		echo $ans
		exit 0
		;;
	* )
		echo "
The partition you specified, $ans, is not valid.  Check the list of 
available partitions for the disk you have selected."  1>&2
		continue
		;;
	esac
done