getopt - Process single-character switches with switch clustering
getopts - Process single-character switches with switch clustering
use Getopt::Std; getopt('oDI'); # -o, -D & -I take arg. Sets opt_* as a side effect. getopts('oif:'); # -o & -i are boolean flags, -f takes an argument # Sets opt_* as a side effect.
The getopt() functions processes single-character switches with switch clustering. Pass one argument which is a string containing all switches that take an argument. For each switch found, sets $opt_x (where x is the switch name) to the value of the argument, or 1 if no argument. Switches which take an argument don't care whether there is a space between the switch and the argument.