使用getopt处理shell脚本的参数实例学习

#!/bin/bash 
 
# A small example program for using the new getopt(1) program. 
# This program will only work with bash(1) 
# An similar program using the tcsh(1) script language can be found 
# as parse.tcsh 
 
# Example input and output (from the bash prompt): 
# ./parse.bash -a par1 'another arg' --c-long 'wow!*\?' -cmore -b " very long " 
# Option a 
# Option c, no argument 
# Option c, argument `more' 
# Option b, argument ` very long ' 
# Remaining arguments: 
# --> `par1' 
# --> `another arg' 
# --> `wow!*\?' 
 
# Note that we use `"$@"' to let each command-line parameter expand to a  
# separate word. The quotes around `$@' are essential! 
# We need TEMP as the `eval set --' would nuke the return value of getopt. 
TEMP=`getopt -o ab:c:: --long a-long,b-long:,c-long:: \ 
 -n 'example.bash' -- "$@"` 
 
if [ $? != 0 ] ; then echo "Terminating..." >&2 ; exit 1 ; fi 
 
# Note the quotes around `$TEMP': they are essential! 
eval set -- "$TEMP"
 
while true ; do 
case "$1" in
-a|--a-long) echo "Option a" ; shift ;; 
-b|--b-long) echo "Option b, argument \`$2'" ; shift 2 ;; 
-c|--c-long) 
# c has an optional argument. As we are in quoted mode, 
# an empty parameter will be generated if its optional 
# argument is not found. 
case "$2" in
"") echo "Option c, no argument"; shift 2 ;; 
*)  echo "Option c, argument \`$2'" ; shift 2 ;; 
esac ;; 
--) shift ; break ;; 
*) echo "Internal error!" ; exit 1 ;; 
esac 
done 
echo "Remaining arguments:"
for arg do echo '--> '"\`$arg'" ; done

ARGS=`getopt -a -o I:D:T:e:k:LMSsth -l instence:,database:,table:,excute:,key:,list,master,slave,status,tableview,help -- "$@"` 
[ $? -ne 0 ] && usage 
#set -- "${ARGS}" 
eval set -- "${ARGS}"
 
while true 
do 
case "$1" in
-I|--instence) 
instence="$2"
shift 
;; 
-D|--database) 
database="$2"
shift 
;; 
-T|--table) 
table="$2"
shift 
;; 
-e|--excute) 
excute="yes"
shift 
;; 
-k|--key) 
key="$2"
shift 
;; 
-L|--list) 
LIST="yes"
;; 
-M|--master) 
MASTER="yes"
;; 
-S|--slave) 
SLAVE="yes"
;; 
-A|--alldb) 
ALLDB="yes"
;; 
-s|--status) 
STATUS="yes"
;; 
-t|--tableview) 
TABLEVIEW="yes"
;; 
-h|--help) 
usage 
;; 
--) 
shift 
break
;; 
esac 
shift 
done