[Shell] using getopts in functions

[Shell] before using getopts in a function. bashrc has written a function that uses getopts, but it is strange that after this function is called once, the parameter cannot be parsed again and then queried, the OPTIND variable is detected. The original code is as follows: www.2cto. c... [shell] before using getopts in a function. bashrc has written a function that uses getopts, but it is strange that after this function is called once, the parameter cannot be parsed again and then queried, the error is caused by the OPTIND variable. The original code is as follows: www.2cto.com 01 function stjob () {02 # unset OPTIND 03 while getopts ": rsd" opt; do04 case $ opt in05 r) echo $ opt; 06 s) echo $ opt; 07 d) echo $ opt; 08 \? ) Echo "Usage stjob-d-s-r" 09 return; 10 esac11 done12} the cause of the problem is that after the first call, the OPTIND value is saved in the current session, getopts parses parameters based on OPTIND, because the OPTIND has a value when it calls the stjob for the second time, causing the parsing to be abnormal. Therefore, to ensure normal resolution, you should set OPTIND to zero or remove this variable before parsing.