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package Exim::Runtest;
use 5.010;
use strict;
use warnings;
use File::Basename;
use IO::Socket::INET;
use Cwd;
use Carp;
use Exporter;
our @ISA = qw(Exporter);
our @EXPORT_OK = qw(mailgroup dynamic_socket exim_binary flavour flavours);
our %EXPORT_TAGS = (
all => \@EXPORT_OK,
);
use List::Util qw'shuffle';
=head1 NAME
Exim::Runtest - helper functions for the runtest script
=head1 SYNOPSIS
use Exim::Runtest;
my $foo = Exim::Runtest::foo('foo');
=head1 DESCRIPTION
The B<Exim::Runtest> module provides some simple functions
for the F<runtest> script. No functions are exported yet.
=cut
sub mailgroup {
my $group = shift // croak "Need a default group name.";
croak "Need a group *name*, not a numeric group id."
if $group =~ /^\d+$/;
return $group if getgrnam $group;
my @groups;
setgrent or die "setgrent: $!\n";
push @groups, $_ while defined($_ = getgrent);
endgrent;
return (shuffle @groups)[0];
}
sub dynamic_socket {
my $socket;
for (my $port = 1024; $port < 65000; $port++) {
$socket = IO::Socket::INET->new(
LocalHost => '127.0.0.1',
LocalPort => $port,
Listen => 10,
ReuseAddr => 1,
) and return $socket;
}
croak 'Can not allocate a free port.';
}
sub exim_binary {
# two simple cases, absolute path or relative path and executable
if (@_) {
return @_ if $_[0] =~ /^\//;
return Cwd::abs_path(shift), @_ if -x $_[0];
}
# so we're still here, if the simple approach didn't help.
# if there is '../exim-snapshot/<build-dir>/exim', use this
# if there is '../exim4/<build-dir>/exim', use this
# if there is '../exim-*.*/<build-dir>/exim', use the one with the highest version
# 4.84 < 4.85RC1 < 4.85RC2 < 4.85 < 4.86RC1 < … < 4.86
# if there is '../src/<build-dir>', use this
#
my $prefix = '..'; # was intended for testing.
# get a list of directories having the "scripts/{os,arch}-type"
# scripts
my @candidates = grep { -x "$_/scripts/os-type" and -x "$_/scripts/arch-type" }
"$prefix/exim-snapshot", "$prefix/exim4", # highest priority
(reverse sort { # list of exim-*.* directories
# split version number from RC number
my @a = ($a =~ /(\d+\.\d+)(?:RC(\d+))?/);
my @b = ($b =~ /(\d+\.\d+)(?:RC(\d+))?/);
# if the versions are not equal, we're fine,
# but otherwise we've to compare the RC number, where an
# empty RC number is better than a non-empty
($a[0] cmp $b[0]) || (defined $a[1] ? defined $b[1] ? $a[1] cmp $b[1] : -1 : 1)
} glob "$prefix/exim-*.*"),
"$prefix/src"; # the "normal" source
# binaries should be found now depending on the os-type and
# arch-type in the directories we got above
my @binaries = grep { -x }
map { ("$_/exim", "$_/exim4") }
map {
my $os = `$_/scripts/os-type`;
my $arch = `$_/scripts/arch-type`;
chomp($os, $arch);
"$_/build-$os-$arch" . ($ENV{EXIM_BUILD_SUFFIX} ? ".$ENV{EXIM_BUILD_SUFFIX}" : '');
} @candidates;
return $binaries[0], @_;
}
sub flavour {
my $etc = '/etc';
if (@_) {
croak "do not pass a directory, it's for testing only"
unless $ENV{HARNESS_ACTIVE};
$etc = shift;
}
if (open(my $f, '<', "$etc/os-release")) {
local $_ = join '', <$f>;
my ($id) = /^ID="?(.*?)"?\s*$/m;
my $version = /^VERSION_ID="?(.*?)"?\s*$/m ? $1 : '';
return "$id$version";
}
if (open(my $f, '<', "$etc/debian_version")) {
chomp(local $_ = <$f>);
$_ = int $_;
return "debian$_";
}
undef;
}
sub flavours {
my %h = map { /\.(\S+)$/, 1 }
glob('stdout/*.*'), glob('stderr/*.*');
return sort keys %h;
}
1;
__END__
=head1 FUNCTIONS
=over
=item B<mailgroup>(I<$default>)
Check if the mailgroup I<$default> exists. Return the checked
group name or some other random but existing group.
=item B<dynamic_socket>()
Return a dynamically allocated listener socket in the range
between 1024 and 65534;
=item ($binary, @argv) = B<exim_binary>(I<@argv>)
Find the Exim binary. Consider the first element of I<@argv>
and remove it from I<@argv>, if it is an executable binary.
Otherwise search the binary (while honouring C<EXIM_BUILD_SUFFIX>,
C<../scripts/os-type> and C<../os-arch>) and return the
the path to the binary and the unmodified I<@argv>.
=item B<flavour>()
Find a hint for the current flavour (Linux distro). It does so by checking
typical files in the F</etc> directory.
=item B<flavours>()
Return a list of available flavours. It does so by scanning F<stdout/> and
F<stderr/> for I<flavour> files (extensions after the numerical prefix.
=back
=cut
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