sys/socket.h, from pty-helper.h.
(pty_send_message): Check if SCM_CREDENTIALS is defined.
(pty_recv_message): Check if SCM_CREDENTIALS or SCM_UCRED is
defined, and support both interfaces (for Linux and Solaris,
respectively).

Rev: src/pty-helper.c:1.5
Rev: src/pty-helper.h:1.4