实用网络脚本大揭秘

1. 美国电话区号查询脚本

1.1 代码实现

#!/bin/bash # areacode--Given a three-digit US telephone area code, identifies the city # and state using the simple tabular data at Bennet Yee's website. source="http://www.bennetyee.org/ucsd-pages/area.html" if [ -z "$1" ] ; then echo "usage: areacode <three-digit US telephone area code>" exit 1 fi # wc -c returns characters + end of line char, so 3 digits = 4 chars if [ "$(echo $1 | wc -c)" -ne 4 ] ; then echo "areacode: wrong length: only works with three-digit US area codes" exit 1 fi # Are they all digits? if [ ! -z "$(echo $1 | sed 's/[[:digit:]]//g')" ] ; then echo "areacode: not-digits: area codes can only be made up of digits" exit 1 fi # Now, finally, let's