pack_sockaddr_un

Build a packed sockaddr_un from a filesystem path, for use with Unix-domain sockets.

Synopsis

my $sun = pack_sockaddr_un($path);

What you get back

A fixed-size byte string matching the platform’s struct sockaddr_un, ready for bind or connect against an AF_UNIX / AF_LOCAL socket.

Examples

socket(my $sock, AF_UNIX, SOCK_STREAM, 0) or die $!;
connect($sock, pack_sockaddr_un("/tmp/app.sock")) or die $!;

## Abstract Linux namespace: first byte is NUL.

my $sun = pack_sockaddr_un("\0app.mysvc");

Edge cases

• Paths longer than 107 bytes are truncated to fit sun_path.

• No explicit trailing NUL is appended by the caller; the struct is zero-initialised and the path is copied in.

Differences from upstream

Fully compatible with upstream Socket.

See also

• unpack_sockaddr_un — reverse direction.

• sockaddr_family — read the family byte from an unknown sockaddr.