magic.t

UNIX下perl实现代码

#!./perl

BEGIN {
    $| = 1;
    chdir 't' if -d 't';
    @INC = '../lib';
    $SIG{__WARN__} = sub { die "Dying on warning: ", @_ };
}

use warnings;

sub ok {
    my ($n, $result, $info) = @_;
    if ($result) {
	print "ok $n\n";
    }
    else {
    	print "not ok $n\n";
	print "# $info\n" if $info;
    }
}

$Is_MSWin32  = $^O eq 'MSWin32';
$Is_VMS      = $^O eq 'VMS';
$Is_Dos      = $^O eq 'dos';
$Is_os2      = $^O eq 'os2';
$Is_Cygwin   = $^O eq 'cygwin';
$PERL = ($Is_MSWin32 ? '.\perl' : './perl');

print "1..35\n";

eval '$ENV{"FOO"} = "hi there";';	# check that ENV is inited inside eval
if ($Is_MSWin32) { ok 1, `cmd /x /c set FOO` eq "FOO=hi there\n"; }
else             { ok 1, `echo \$FOO` eq "hi there\n"; }

unlink 'ajslkdfpqjsjfk';
$! = 0;
open(FOO,'ajslkdfpqjsjfk');
ok 2, $!, $!;
close FOO; # just mention it, squelch used-only-once

if ($Is_MSWin32 || $Is_Dos) {
    ok "3 # skipped",1;
    ok "4 # skipped",1;
}
else {
  # the next tests are embedded inside system simply because sh spits out
  # a newline onto stderr when a child process kills itself with SIGINT.
  system './perl', '-e', <<'END';

    $| = 1;		# command buffering

    $SIG{"INT"} = "ok3";     kill "INT",$$; sleep 1;
    $SIG{"INT"} = "IGNORE";  kill "INT",$$; sleep 1; print "ok 4\n";
    $SIG{"INT"} = "DEFAULT"; kill "INT",$$; sleep 1; print "not ok\n";

    sub ok3 {
	if (($x = pop(@_)) eq "INT") {
	    print "ok 3\n";
	}
	else {
	    print "not ok 3 ($x @_)\n";
	}
    }

END
}

# can we slice ENV?
@val1 = @ENV{keys(%ENV)};
@val2 = values(%ENV);
ok 5, join(':',@val1) eq join(':',@val2);
ok 6, @val1 > 1;

# regex vars
'foobarbaz' =~ /b(a)r/;
ok 7, $` eq 'foo', $`;
ok 8, $& eq 'bar', $&;
ok 9, $' eq 'baz', $';
ok 10, $+ eq 'a', $+;

# $"
@a = qw(foo bar baz);
ok 11, "@a" eq "foo bar baz", "@a";
{
    local $" = ',';
    ok 12, "@a" eq "foo,bar,baz", "@a";
}

# $;
%h = ();
$h{'foo', 'bar'} = 1;
ok 13, (keys %h)[0] eq "foo\034bar", (keys %h)[0];
{
    local $; = 'x';
    %h = ();
    $h{'foo', 'bar'} = 1;
    ok 14, (keys %h)[0] eq 'fooxbar', (keys %h)[0];
}

# $?, $@, $$
system qq[$PERL -e "exit(0)"];
ok 15, $? == 0, $?;
system qq[$PERL -e "exit(1)"];
ok 16, $? != 0, $?;

eval { die "foo\n" };
ok 17, $@ eq "foo\n", $@;

ok 18, $$ > 0, $$;

# $^X and $0
{
    if ($^O eq 'qnx') {
	chomp($wd = `/usr/bin/fullpath -t`);
    }
    elsif($Is_Cygwin) {
       # Cygwin turns the symlink into the real file
       chomp($wd = `pwd`);
       $wd =~ s#/t$##;
    }
    elsif($Is_os2) {
       $wd = Cwd::sys_cwd();
    }
    else {
	$wd = '.';
    }
    my $perl = "$wd/perl";
    my $headmaybe = '';
    my $tailmaybe = '';
    $script = "$wd/show-shebang";
    if ($Is_MSWin32) {
	chomp($wd = `cd`);
	$wd =~ s|\\|/|g;
	$perl = "$wd/perl.exe";
	$script = "$wd/show-shebang.bat";
	$headmaybe = <<EOH ;
\@rem ='
\@echo off
$perl -x \%0
goto endofperl
\@rem ';
EOH
	$tailmaybe = <<EOT ;

__END__
:endofperl
EOT
    }
    elsif ($Is_os2) {
      $script = "./show-shebang";
    }
    if ($^O eq 'os390' or $^O eq 'posix-bc' or $^O eq 'vmesa') {  # no shebang
	$headmaybe = <<EOH ;
    eval 'exec ./perl -S \$0 \${1+"\$\@"}'
        if 0;
EOH
    }
    $s1 = "\$^X is $perl, \$0 is $script\n";
    ok 19, open(SCRIPT, ">$script"), $!;
    ok 20, print(SCRIPT $headmaybe . <<EOB . <<'EOF' . $tailmaybe), $!;
#!$wd/perl
EOB
print "\$^X is $^X, \$0 is $0\n";
EOF
    ok 21, close(SCRIPT), $!;
    ok 22, chmod(0755, $script), $!;
    $_ = `$script`;
    s/\.exe//i if $Is_Dos or $Is_Cygwin or $Is_os2;
    s{\bminiperl\b}{perl}; # so that test doesn't fail with miniperl
    s{is perl}{is $perl}; # for systems where $^X is only a basename
    s{\\}{/}g;
    s{[A-Z]:/.*/perl}{./perl} if $Is_Dos;
    ok 23, (($Is_MSWin32 || $Is_Dos || $Is_os2) ? uc($_) eq uc($s1) : $_ eq $s1), " :$_:!=:$s1:";
    $_ = `$perl $script`;
    s/\.exe//i if $Is_Dos or $Is_os2;
    s{\\}{/}g;
    s{[A-Z]:/.*/perl}{./perl} if $Is_Dos;
    ok 24, (($Is_MSWin32 || $Is_Dos || $Is_os2) ? uc($_) eq uc($s1) : $_ eq $s1), " :$_:!=:$s1: after `$perl $script`";
    ok 25, unlink($script), $!;
}

# $], $^O, $^T
ok 26, $] >= 5.00319, $];
ok 27, $^O;
ok 28, $^T > 850000000, $^T;

if ($Is_VMS || $Is_Dos) {
	ok "29 # skipped", 1;
	ok "30 # skipped", 1;
}
else {
	$PATH = $ENV{PATH};
	$PDL = $ENV{PERL_DESTRUCT_LEVEL} || 0;
	$ENV{foo} = "bar";
	%ENV = ();
	$ENV{PATH} = $PATH;
	$ENV{PERL_DESTRUCT_LEVEL} = $PDL || 0;
	ok 29, ($Is_MSWin32 ? (`cmd /x /c set foo 2>NUL` eq "")
				: (`echo \$foo` eq "\n") );

	$ENV{__NoNeSuCh} = "foo";
	$0 = "bar";
	ok 30, ($Is_MSWin32 ? (`cmd /x /c set __NoNeSuCh` eq "__NoNeSuCh=foo\n")
			    : (`echo \$__NoNeSuCh` eq "foo\n") );
}

{
    local $SIG{'__WARN__'} = sub { print "# @_\nnot " };
    $! = undef;
    print "ok 31\n";
}

# test case-insignificance of %ENV (these tests must be enabled only
# when perl is compiled with -DENV_IS_CASELESS)
if ($Is_MSWin32) {
    %ENV = ();
    $ENV{'Foo'} = 'bar';
    $ENV{'fOo'} = 'baz';
    ok 32, (scalar(keys(%ENV)) == 1);
    ok 33, exists($ENV{'FOo'});
    ok 34, (delete($ENV{'foO'}) eq 'baz');
    ok 35, (scalar(keys(%ENV)) == 0);
}
else {
    ok "32 # skipped: no caseless %ENV support",1;
    ok "33 # skipped: no caseless %ENV support",1;
    ok "34 # skipped: no caseless %ENV support",1;
    ok "35 # skipped: no caseless %ENV support",1;
}