#!./perl 

BEGIN {
    require './test.pl';
}

BEGIN {
    use Config;
    if( ! config_value('d_alarm') ) {
        skip_all("alarm() not implemented on this platform");
    }
}

use signals;

plan tests => 5;
my $Perl = which_perl();

my $start_time = time;
try {
    local signals::handler("ALRM") = sub { die "ALARM!\n" };
    alarm 3;

    # perlfunc recommends against using sleep in combination with alarm.
    1 while (time - $start_time +< 6);
};
alarm 0;
my $diff = time - $start_time;

# alarm time might be one second less than you said.
is( $^EVAL_ERROR->{?description}, "ALARM!\n",             'alarm w/$SIG{ALRM} vs inf loop' );
ok( abs($diff - 3) +<= 1,   "   right time" );


my $start_time = time;
try {
    local signals::handler("ALRM") = sub { die "ALARM!\n" };
    alarm 3;
    system(qq{$Perl -e "sleep 6"});
};
alarm 0;
$diff = time - $start_time;

# alarm time might be one second less than you said.
is( $^EVAL_ERROR->{?description}, "ALARM!\n",             'alarm w/$SIG{ALRM} vs system()' );

do {
    local our $TODO = "Why does system() block alarm() on $^OS_NAME?"
		if $^OS_NAME eq 'VMS' || $^OS_NAME eq'MacOS' || $^OS_NAME eq 'dos';
    ok( abs($diff - 3) +<= 1,   "   right time (waited $diff secs for 3-sec alarm)" );
};

do {
    local signals::handler("ALRM") = sub { die "ALARM!\n" };
    try { alarm(1); my $x = qx($Perl -e "sleep 3") };
    chomp (my $foo = "foo\n");
    ok($foo eq "foo", '[perl #33928] chomp() fails after alarm(), `sleep`');
};