Example of using getopt in Shellscript

The example of using getopt in Shellscript to use getopt has the following format options and corresponding parameters: www.2cto. comShell code #! /Bin/bashset -- 'getopt-qab: c & quot ;@ @ & quot; 'While [-n & quot; $1 & quot;] docase & quot ;... in Shell script, The getopt example can easily use the format option with the corresponding parameter. The example is www.2cto.com Shell code #! /Bin/bash set -- 'getopt-q AB: c "$ @" 'while [-n "$1"] do case "$1" in-) echo "option-a";-B) value = "$2" echo "option-B with para $ value" shift;-c) echo "option-c"; --) shift break; *) echo "$1 not option ";; esac shift done count = 1 for para in "$ @" do echo "# $ count = $ para" count = $ [$ count + 1] done. /test-AB test1-cd test2 test3 test4 result: option-a option-B with para 'test1' option-c #1 = 'Test2' #2 = 'test3' #3 = 'test4' getopt usage: getopt options optstring parameters. getopt is powerless for parameter types such as/test-AB test1-cd "test2 test3" test4. This requires getopts www.2cto.com Shell code #! /Bin/bash while getopts: AB: c opt do case $ opt in a) echo "-a option"; B) echo "-B option with value $ OPTARG ";; c) echo "-c option"; *) echo $ opt not a option; esac done OPTARG environment variable stores the parameters of corresponding options. /test-AB "hello, world"-cdefg result:-a option-B option with value hello, world-c option? Not a option? Not a option? Not a option? Not a option command parameter processing Shell code #! /Bin/bash while getopts: AB: cd opt do case $ opt in a) echo "-a option"; B) echo "-B option with value $ OPTARG ";; c) echo "-c option"; d) echo "-d option"; *) echo $ opt not a option ;; esac done count = 1 shift $ [$ OPTIND-1] for para in "$ @" do echo "# $ count = $ para" count = $ [$ count + 1] done. /test-abtest1-cd test2 test3 test4 result: www.2cto.com-a option-B option with value test1-c option-d option #1 = test2 #2 = test3 #3 = test4 OPTIND environment variable to store the current bit of the remaining parameter list of the getopts command value usage: getopts optstring variable