Linux command
getopts 命令
文件
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常用示例
Basic option parsing
while getopts "ab:c" opt; do case $opt in a) echo "Option a";; b) echo "Option b with arg: $OPTARG";; c) echo "Option c";; esac; done
Parse options with arguments
getopts "f:o:v" opt
Silent error mode
getopts ":ab:c" opt
Shift processed arguments
shift $((OPTIND - 1))
Handle unknown options
case $opt in \?) echo "Invalid option: -$OPTARG";; esac
说明
getopts is a POSIX shell builtin for parsing short command-line options in scripts. It processes options one at a time, typically used in a while loop with a case statement to handle each option. Options are single characters preceded by a dash (e.g., -a, -b). Options can be combined (-abc). Options requiring arguments can have the argument immediately following (-ffile) or as the next argument (-f file). When all options are processed, getopts returns a non-zero exit status. After parsing, use shift $((OPTIND - 1)) to remove processed options, leaving remaining arguments in $@.
FAQ
What is the getopts command used for?
getopts is a POSIX shell builtin for parsing short command-line options in scripts. It processes options one at a time, typically used in a while loop with a case statement to handle each option. Options are single characters preceded by a dash (e.g., -a, -b). Options can be combined (-abc). Options requiring arguments can have the argument immediately following (-ffile) or as the next argument (-f file). When all options are processed, getopts returns a non-zero exit status. After parsing, use shift $((OPTIND - 1)) to remove processed options, leaving remaining arguments in $@.
How do I run a basic getopts example?
Run `while getopts "ab:c" opt; do case $opt in a) echo "Option a";; b) echo "Option b with arg: $OPTARG";; c) echo "Option c";; esac; done` in a terminal, then adjust file names, paths, flags, or remote targets for your system.
Where can I find more getopts examples?
This page includes 5 examples for getopts, plus related commands for nearby Linux tasks.