End of Life Ruby 3.2 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →

instance method

BasicSocket#getpeereid

basicsocket.getpeereid => [euid, egid]

ext/socket/basicsocket.c View on GitHub ↗

static VALUE
bsock_getpeereid(VALUE self)
{
#if defined(HAVE_GETPEEREID)
    rb_io_t *fptr;
    uid_t euid;
    gid_t egid;
    GetOpenFile(self, fptr);
    if (getpeereid(fptr->fd, &euid, &egid) == -1)
        rb_sys_fail("getpeereid(3)");
    return rb_assoc_new(UIDT2NUM(euid), GIDT2NUM(egid));
#elif defined(SO_PEERCRED) /* GNU/Linux */
    rb_io_t *fptr;
    struct ucred cred;
    socklen_t len = sizeof(cred);
    GetOpenFile(self, fptr);
    if (getsockopt(fptr->fd, SOL_SOCKET, SO_PEERCRED, &cred, &len) == -1)
        rb_sys_fail("getsockopt(SO_PEERCRED)");
    return rb_assoc_new(UIDT2NUM(cred.uid), GIDT2NUM(cred.gid));
#elif defined(HAVE_GETPEERUCRED) /* Solaris */
    rb_io_t *fptr;
    ucred_t *uc = NULL;
    VALUE ret;
    GetOpenFile(self, fptr);
    if (getpeerucred(fptr->fd, &uc) == -1)
        rb_sys_fail("getpeerucred(3C)");
    ret = rb_assoc_new(UIDT2NUM(ucred_geteuid(uc)), GIDT2NUM(ucred_getegid(uc)));
    ucred_free(uc);
    return ret;
#endif
}

Returns the user and group on the peer of the UNIX socket. The result is a two element array which contains the effective uid and the effective gid.

Example

Socket.unix_server_loop("/tmp/sock") {|s|
  begin
    euid, egid = s.getpeereid

    # Check the connected client is myself or not.
    next if euid != Process.uid

    # do something about my resource.

  ensure
    s.close
  end
}

See also #do_not_reverse_lookup= #getpeername #do_not_reverse_lookup #getsockname also in 4.1 · 4.0 · 3.4 · 3.3 · 3.1 · 3.0

‹ prev#do_not_reverse_lookup= next ›#getpeername