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#!/usr/bin/perl
use strict;
use warnings;
use feature 'say';
use OpenBSD::Pledge;
use OpenBSD::Unveil;
# Inititalize pledge.
pledge( qw( stdio rpath unveil ) ) or
die "Unable to pledge: $!";
# $term will store the user input.
my $term;
# User must pass at least one argument.
if (@ARGV < 1) {
say STDERR "usage: wtf.pl term";
exit 1;
} else {
$term = $ARGV[0];
# User can rename this program to "wtf" & run "wtf is wtf" too
# instead of "wtf wtf" or "pictor wtf", "wtf is term" looks
# better.
$term = $ARGV[1] if
($ARGV[0] eq "is")
}
# files contains list of all files to search for acronyms.
my @files = (
'/usr/local/share/misc/acronyms',
'/usr/local/share/misc/acronyms-o',
'/usr/local/share/misc/acronyms.comp'
);
# Unveil each file with only read permission.
foreach my $fn (@files) {
unveil( $fn, "r" ) or
die "Unable to unveil: $!";
}
# Block further unveil calls.
unveil() or
die "Unable to lock unveil: $!";
# Drop unveil permission.
pledge( qw( stdio rpath ) ) or
die "Unable to pledge: $!";
# $total_acronyms will hold the total number of acronyms we find.
my $total_acronyms = 0;
# Search for acronym in every file.
foreach my $fn (@files) {
open my $fh, '<', $fn or
# The program should continue if the file doesn't exist but
# warn the user about it.
do {
warn "Unable to open $fn: $!";
next;
};
while (my $line = readline $fh) {
# \Q is quotemeta, \E terminates it because otherwise it would
# mess with \t. This regex matches when $line starts with
# "$term\t". We replace \t with ": " before printing to make
# the input neat.
print $line =~ s/\t/: /r and
$total_acronyms++ if
($line =~ /^\Q${term}\E\t/i);
}
}
# Drop rpath permission.
pledge( qw( stdio ) ) or
die "Unable to pledge: $!";
# Print an error message if we don't find any match.
say STDERR "I don't know what '$term' means!" and
exit 1 unless
$total_acronyms;
# Drop pledge permissions.
pledge() or
die "Unable to pledge: $!";
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