PAL.C.T MINI SHELL
;# getopts.pl - a better getopt.pl
#
# This library is no longer being maintained, and is included for backward
# compatibility with Perl 4 programs which may require it.
#
# In particular, this should not be used as an example of modern Perl
# programming techniques.
#
# Suggested alternatives: Getopt::Long or Getopt::Std
#
;# Usage:
;# do Getopts('a:bc'); # -a takes arg. -b & -c not. Sets opt_* as a
;# # side effect.
sub Getopts {
local($argumentative) = @_;
local(@args,$_,$first,$rest);
local($errs) = 0;
local($[) = 0;
@args = split( / */, $argumentative );
while(@ARGV && ($_ = $ARGV[0]) =~ /^-(.)(.*)/) {
($first,$rest) = ($1,$2);
$pos = index($argumentative,$first);
if($pos >= $[) {
if($args[$pos+1] eq ':') {
shift(@ARGV);
if($rest eq '') {
++$errs unless(@ARGV);
$rest = shift(@ARGV);
}
eval "
push(\@opt_$first, \$rest);
if (!defined \$opt_$first or \$opt_$first eq '') {
\$opt_$first = \$rest;
}
else {
\$opt_$first .= ' ' . \$rest;
}
";
}
else {
eval "\$opt_$first = 1";
if($rest eq '') {
shift(@ARGV);
}
else {
$ARGV[0] = "-$rest";
}
}
}
else {
print STDERR "Unknown option: $first\n";
++$errs;
if($rest ne '') {
$ARGV[0] = "-$rest";
}
else {
shift(@ARGV);
}
}
}
$errs == 0;
}
1;
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