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# ex:ts=8 sw=4:
# $OpenBSD: Interactive.pm,v 1.12 2009/11/28 09:41:14 espie Exp $
#
# Copyright (c) 2005-2007 Marc Espie <espie@openbsd.org>
#
# Permission to use, copy, modify, and distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
use strict;
use warnings;
package OpenBSD::Interactive;
my $always = 0;
sub ask_list
{
my ($prompt, $interactive, @values) = @_;
if (!$interactive || !-t STDIN || $always) {
return $values[0];
}
print STDERR $prompt, "\n";
my $i = 0;
for my $v (@values) {
printf STDERR "%s\t%2d: %s\n", $i == 0 ? " a" : "" , $i, $v;
$i++;
}
LOOP:
print STDERR "Your choice: ";
my $result = <STDIN>;
unless (defined $result) {
print STDERR "\n";
return $values[0];
}
chomp $result;
if ($result eq '') {
return $values[0];
}
if ($result eq 'a') {
$always = 1;
return $values[0];
}
if ($result =~ m/^\d+$/o) {
if ($result >= 0 && $result < @values) {
return $values[$result];
}
print STDERR "invalid numeric value !\n";
goto LOOP;
}
if (grep { $result eq $_ } @values) {
return $result;
} else {
print STDERR "Ambiguous value !\n";
goto LOOP;
}
}
sub confirm
{
my ($prompt, $default) = @_;
if (!-t STDIN) {
return 0;
}
if ($always) {
return 1;
}
LOOP2:
print STDERR $prompt, $default ? "? [Y/n/a] " : "? [y/N/a] ";
my $result = <STDIN>;
unless(defined $result) {
print STDERR "\n";
return $default;
}
chomp $result;
$result =~ s/\s+//go;
$result =~ tr/A-Z/a-z/;
if ($result eq 'yes' or $result eq 'y') {
return 1;
}
if ($result eq 'no' or $result eq 'n') {
return 0;
}
if ($result eq 'a') {
$always = 1;
return 1;
}
if ($result eq '') {
return $default;
}
print STDERR "Ambiguous answer\n";
goto LOOP2;
}
1;
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