OpenBSD::Getopt(3p) Perl Programmers Reference Guide OpenBSD::Getopt(3p)

OpenBSD::Getopt(3p) Perl Programmers Reference Guide OpenBSD::Getopt(3p) #

OpenBSD::Getopt(3p) Perl Programmers Reference Guide OpenBSD::Getopt(3p)

NNAAMMEE #

 OpenBSD::Getopt - Process single-characters switches

SSYYNNOOPPSSIISS #

    use OpenBSD::Getopt;

    my $h = { 'v' =>
             sub() {
                 ++$opt_v;
             };
    };
    getopts('oifv:', $h);

DDEESSCCRRIIPPTTIIOONN #

 This is similar to ggeettoopptt(3). One call to "getopts($optstring, $h)"
 parses all the options using the $optstring as a list of simple switches
 (letter) and switches with arguments (letter followed by ":").

 Option values are written into the hash $h.  Contrary to ggeettoopptt(3),
 "$h->{v}" is incremented each time the switch is seen, to allow for stuff
 like "-vv".

 Alternately, a code ref can be put into the hash for a given switch.
 When a switch is seen, the sub $foo is called as "&$foo()" for a simple
 switch and as "&$foo(option_value)" for a switch with argument.

perl v5.36.3 2023-05-21 OpenBSD::Getopt(3p)