You want to communicate with other processes on only the local machine.
Use domain sockets. You can use the code and techniques from the preceding Internet domain recipes, with the following changes:
Because the naming system is different, use
sockaddr_un instead of
Use IO::Socket::UNIX instead of IO::Socket::INET.
Use PF_UNIX instead of PF_INET, and give PF_UNSPEC as the last
SOCK_STREAM clients don’t have to
bind to a
local address before they
Unix domain sockets have names like files on the filesystem. In fact,
most systems implement them as special files; that’s what
-S filetest operator looks
for—whether the file is a Unix domain socket.
Supply the filename as the Peer argument to
IO::Socket::UNIX->new, or encode it with
sockaddr_un and pass it to
connect. Here’s how to make server and
client Unix domain datagram sockets with IO::Socket::UNIX:
use IO::Socket; unlink "/tmp/mysock"; $server = IO::Socket::UNIX->new(LocalAddr => "/tmp/mysock", Type => SOCK_DGRAM, Listen => 5 ) or die $@; $client = IO::Socket::UNIX->new(PeerAddr => "/tmp/mysock", Type => SOCK_DGRAM, Timeout => 10 ) or die $@;
Here’s how to use the traditional functions to make stream sockets:
use Socket; socket(SERVER, PF_UNIX, SOCK_STREAM, 0); unlink "/tmp/mysock"; bind(SERVER, sockaddr_un("/tmp/mysock")) or die "Can't create server: $!"; socket(CLIENT, PF_UNIX, SOCK_STREAM, 0); connect(CLIENT, sockaddr_un("/tmp/mysock")) ...