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#!/usr/bin/perl
use strict;
use warnings;
use constant is_OpenBSD => $^O eq "openbsd";
if (is_OpenBSD) {
require OpenBSD::Unveil;
OpenBSD::Unveil->import;
require OpenBSD::Pledge;
OpenBSD::Pledge->import;
} else {
sub unveil { return 1; }
sub pledge { return 1; }
}
# Inititalize pledge.
pledge( qw( stdio rpath unveil ) )
or die "Unable to pledge: $!";
# User must pass at least one argument.
die "usage: pictor term\n"
unless @ARGV > 0;
my $term = $ARGV[0];
# Ignore "is" operand if it's passed.
if ( $ARGV[0] eq "is"
and @ARGV > 1 ) {
$term = $ARGV[1];
}
# 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: $!\n";
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.
if ($line =~ /^\Q${term}\E\t/i) {
print $line =~ s/\t/: /r;
$total_acronyms++;
}
}
}
# Drop rpath permission.
pledge( qw( stdio ) )
or die "Unable to pledge: $!";
# die if no match is found.
die "I don't know what '$term' means!\n"
unless $total_acronyms;
# Drop pledge permissions.
pledge()
or die "Unable to pledge: $!";
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