Add a hopefully comforting message if there seems to be no LFS.

[p5sagit/p5-mst-13.2.git] / t / lib / ipc_sysv.t

#!./perl

BEGIN {
    chdir 't' if -d 't';

    unshift @INC, '../lib';

    require Config; import Config;

    my $reason;

    if ($Config{'d_sem'} ne 'define') {
      $reason = '$Config{d_sem} undefined';
    } elsif ($Config{'d_msg'} ne 'define') {
      $reason = '$Config{d_msg} undefined';
    }
    if ($reason) {
	print "1..0 # Skip: $reason\n";
	exit 0;
    }
}

# These constants are common to all tests.
# Later the sem* tests will import more for themselves.

use IPC::SysV qw(IPC_PRIVATE IPC_NOWAIT IPC_STAT IPC_RMID
		 S_IRWXU S_IRWXG S_IRWXO S_IWGRP S_IROTH S_IWOTH);
use strict;

print "1..16\n";

my $msg;
my $sem;

$SIG{__DIE__} = 'cleanup'; # will cleanup $msg and $sem if needed

# FreeBSD is known to throw this if there's no SysV IPC in the kernel.
$SIG{SYS} = sub {
    print STDERR <<EOM;
SIGSYS caught.
It may be that your kernel does not have SysV IPC configured.

EOM
    if ($^O eq 'freebsd') {
	print STDERR <<EOM;
You must have following options in your kernel:

options         SYSVSHM
options         SYSVSEM
options         SYSVMSG

See config(8).
EOM
    }
    exit(1);
};

my $perm;

$perm = S_IRWXU | S_IRWXG | S_IRWXO | S_IWGRP | S_IROTH | S_IWOTH
    if $^O eq 'vmesa';

$perm = S_IRWXU | S_IRWXG | S_IRWXO unless defined $perm;

if ($Config{'d_msgget'} eq 'define' &&
    $Config{'d_msgctl'} eq 'define' &&
    $Config{'d_msgsnd'} eq 'define' &&
    $Config{'d_msgrcv'} eq 'define') {

    $msg = msgget(IPC_PRIVATE, $perm);
    # Very first time called after machine is booted value may be 0 
    die "msgget failed: $!\n" unless defined($msg) && $msg >= 0;

    print "ok 1\n";

    #Putting a message on the queue
    my $msgtype = 1;
    my $msgtext = "hello";

    msgsnd($msg,pack("L a*",$msgtype,$msgtext),0) or print "not ";
    print "ok 2\n";

    my $data;
    msgctl($msg,IPC_STAT,$data) or print "not ";
    print "ok 3\n";

    print "not " unless length($data);
    print "ok 4\n";

    my $msgbuf;
    msgrcv($msg,$msgbuf,256,0,IPC_NOWAIT) or print "not ";
    print "ok 5\n";

    my($rmsgtype,$rmsgtext) = unpack("L a*",$msgbuf);

    print "not " unless($rmsgtype == $msgtype && $rmsgtext eq $msgtext);
    print "ok 6\n";
} else {
    for (1..6) {
	print "ok $_\n"; # fake it
    }
}

if($Config{'d_semget'} eq 'define' &&
   $Config{'d_semctl'} eq 'define') {

    if ($Config{'d_semctl_semid_ds'} eq 'define' ||
	$Config{'d_semctl_semun'}    eq 'define') {

	use IPC::SysV qw(IPC_CREAT GETALL SETALL);

	$sem = semget(IPC_PRIVATE, 10, $perm | IPC_CREAT);
	# Very first time called after machine is booted value may be 0 
	die "semget: $!\n" unless defined($sem) && $sem >= 0;

	print "ok 7\n";

	my $data;
	semctl($sem,0,IPC_STAT,$data) or print "not ";
	print "ok 8\n";
	
	print "not " unless length($data);
	print "ok 9\n";

	my $nsem = 10;

	semctl($sem,0,SETALL,pack("s!*",(0) x $nsem)) or print "not ";
	print "ok 10\n";

	$data = "";
	semctl($sem,0,GETALL,$data) or print "not ";
	print "ok 11\n";

	print "not " unless length($data) == length(pack("s!*",(0) x $nsem));
	print "ok 12\n";

	my @data = unpack("s!*",$data);

	my $adata = "0" x $nsem;

	print "not " unless @data == $nsem and join("",@data) eq $adata;
	print "ok 13\n";

	my $poke = 2;

	$data[$poke] = 1;
	semctl($sem,0,SETALL,pack("s!*",@data)) or print "not ";
	print "ok 14\n";
    
	$data = "";
	semctl($sem,0,GETALL,$data) or print "not ";
	print "ok 15\n";

	@data = unpack("s!*",$data);

	my $bdata = "0" x $poke . "1" . "0" x ($nsem-$poke-1);

	print "not " unless join("",@data) eq $bdata;
	print "ok 16\n";
    } else {
	for (7..16) {
	    print "ok $_ # skipped, no semctl possible\n";
	}
    }
} else {
    for (7..16) {
	print "ok $_\n"; # fake it
    }
}

sub cleanup {
    msgctl($msg,IPC_RMID,0)       if defined $msg;
    semctl($sem,0,IPC_RMID,undef) if defined $sem;
}

cleanup;