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#!/usr/bin/perl
use strict;
use warnings;
use feature 'say';
use Path::Tiny;
use IPC::Run3;
use constant is_OpenBSD => $^O eq "openbsd";
require OpenBSD::Unveil
if is_OpenBSD;
sub unveil {
if (is_OpenBSD) {
return OpenBSD::Unveil::unveil(@_);
} else {
return 1;
}
}
# Unveil @INC.
foreach my $path (@INC) {
unveil( $path, 'rx' )
or die "Unable to unveil: $!\n";
}
my %dispatch = (
"edit" => \&edit,
"random" => \&random,
"help" => \&HelpMessage,
);
sub HelpMessage {
say qq{Usage:
edit
Edit the file. (opens in \$EDITOR)
random
Print a random fortune.
help
Show this text.}
}
sub unveil_fortune_file {
my $fortune_file = "$ENV{HOME}/quotes.txt";
$fortune_file = $ARGV[1] if $ARGV[1]; # Use $ARGV[1] as path if it exists.
unveil( $fortune_file, "r" )
or die "Unable to unveil: $!\n"; # Unveil $path as read-only.
return $fortune_file;
}
# Open fortune file with a text editor.
sub edit {
# Unveil $PATH.
foreach my $path ( split(/:/, $ENV{PATH}) ) {
unveil( $path, "rx" )
or die "Unable to unveil: $!\n";
}
my @editor = split(/ /, $ENV{EDITOR});
push @editor, "vi"
unless scalar @editor; # Push "vi" if @editor is empty.
my $fortune_file = unveil_fortune_file();
run3 [ @editor, $fortune_file ];
}
# Print a random fortune from $path.
sub random {
my $fortune_file = unveil_fortune_file();
my $file = path($fortune_file)->absolute;
my @fortunes = split/\n%\n/, $file->slurp;
say $fortunes[ rand @fortunes ]; # Print random fortune.
}
if ( $ARGV[0]
and $dispatch{ $ARGV[0] } ) {
$dispatch{ $ARGV[0] }->();
} elsif ( scalar @ARGV == 0 ) {
HelpMessage();
} else {
say "lyra: no such option";
}
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