Process command-line arguments (or
args, if specified) and check
for legal options. getopts
is used in shell script loops and is intended to ensure standard syntax for
command-line options. Standard syntax dictates that command-line
options begin with a
+ or a
-. Options can be
stacked; i.e., consecutive letters can follow a single -. End
processing of options by specifying -- on the command line.
string contains the option letters
to be recognized by getopts when running the shell script. Valid options are processed
in turn and stored in the shell variable
If an option is followed by a
colon, the option must be followed by one or more arguments.
getopts uses the shell variables OPTARG and OPTIND.
getopts is available to non-Bourne shell users as