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executable file 58 lines (44 sloc) 1.17 kb
#!/usr/bin/perl
use Socket;
use Getopt::Std;
$Usage = qq{
Usage: $0 options command...
Options: -d hostname destination hostname (default: localhost)
-p port SVDRP port number (default: 6419)
};
die $Usage if (!$ARGV[0] || !getopts("d:p:"));
$Dest = $opt_d || "localhost";
$Port = $opt_p || 6419;
$Cmd = "@ARGV" || Error("missing command");
$Timeout = 10; # max. seconds to wait for response
$SIG{ALRM} = sub { Error("timeout"); };
alarm($Timeout);
$iaddr = inet_aton($Dest) || Error("no host: $Dest");
$paddr = sockaddr_in($Port, $iaddr);
$proto = getprotobyname('tcp');
socket(SOCK, PF_INET, SOCK_STREAM, $proto) || Error("socket: $!");
connect(SOCK, $paddr) || Error("connect: $!");
select(SOCK); $| = 1;
Receive();
Send($Cmd);
Send("quit");
close(SOCK) || Error("close: $!");
sub Send
{
my $cmd = shift || Error("no command to send");
print SOCK "$cmd\r\n";
Receive();
}
sub Receive
{
while (<SOCK>) {
print STDOUT $_;
last if substr($_, 3, 1) ne "-";
}
}
sub Error
{
print STDERR "@_\n";
close(SOCK);
exit 1;
}
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