Pretty sure it'll work with an unblessed UNIX socket handle too. 

my ($pid, $uid, $gid) = IO::Handle::Record::peercred($client);

[download]

If not, it should be easy to code in pure Perl since the above function is simply 

void
smh_peercred(s)
    PerlIO* s;
PROTOTYPE: $
PPCODE:
{
# ifdef SO_PEERCRED
  struct ucred uc;
  socklen_t uc_len=sizeof(uc);

  if( !getsockopt(PerlIO_fileno(s), SOL_SOCKET, SO_PEERCRED, &uc, &uc_
+len) ) {
    EXTEND(SP, 3);
    PUSHs(sv_2mortal(newSViv(uc.pid)));
    PUSHs(sv_2mortal(newSViv(uc.uid)));
    PUSHs(sv_2mortal(newSViv(uc.gid)));
  }
# else
  SETERRNO(EOPNOTSUPP, RMS_IFI);
# endif
}

[download]

and fileno (builtin), getsockopt (builtin), SOL_SOCKET (Socket) and SO_PEERCRED (Socket) are all in core Perl.

Mind you, IO::Socket::UNIX is just a thin layer that greatly simplifies socket calls with no loss of flexibility, so I wonder why you want to try to avoid it.

In reply to Re^2: How to read UNIX socket credentials? by ikegami
in thread How to read UNIX socket credentials? by hackman

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