Creates an unnamed pair of sockets in the specified domain, of the specified type. DOMAIN, TYPE, and PROTOCOL are specified the same as for the syscall of the same name. If unimplemented, raises an exception. Returns true if successful.
On systems that support a close-on-exec flag on files, the flag will be set for the newly opened file descriptors, as determined by the value of$^F. See"$^F" in perlvar.
Some systems definepipe in terms ofsocketpair, in which a call topipe($rdr, $wtr) is essentially:
use Socket;socketpair(my $rdr, my $wtr, AF_UNIX, SOCK_STREAM, PF_UNSPEC);shutdown($rdr, 1); # no more writing for readershutdown($wtr, 0); # no more reading for writerSeeperlipc for an example of socketpair use. Perl 5.8 and later will emulate socketpair using IP sockets to localhost if your system implements sockets but not socketpair.
Portability issues:"socketpair" in perlport.
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