3 * $Id: fdpass.h,v 1.1 2003/11/29 11:58:49 mdw Exp $
5 * File descriptor passing
7 * (c) 2003 Straylight/Edgeware
10 /*----- Licensing notice --------------------------------------------------*
12 * This file is part of the mLib utilities library.
14 * mLib is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU Library General Public License as
16 * published by the Free Software Foundation; either version 2 of the
17 * License, or (at your option) any later version.
19 * mLib is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU Library General Public License for more details.
24 * You should have received a copy of the GNU Library General Public
25 * License along with mLib; if not, write to the Free
26 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
30 /*----- Revision history --------------------------------------------------*
33 * Revision 1.1 2003/11/29 11:58:49 mdw
34 * File descriptor passing.
45 /*----- Header files ------------------------------------------------------*/
47 #include <sys/types.h>
50 /*----- Functions provided ------------------------------------------------*/
52 /* --- @fdpass_send@ --- *
54 * Arguments: @int sock@ = socket to send over
55 * @int fd@ = file descriptor to send
56 * @const void *p@ = pointer to data to send
57 * @size_t sz@ = size of buffer to send
59 * Returns: On error, @-1@, otherwise number of bytes transferred from
62 * Use: Sends a copy of file descriptor @fd@ to the other end of
66 extern ssize_t fdpass_send(int /*sock*/, int /*fd*/,
67 const void */*p*/, size_t /*sz*/);
69 /* --- @fdpass_recv@ --- *
71 * Arguments: @int sock@ = socket to send over
72 * @int *fd@ = where to put received descriptor
73 * @void *p@ = pointer to where to put data
74 * @size_t sz@ = size of buffer
76 * Returns: On error, @-1@, otherwise number of bytes transferred.
78 * Use: Receives a file descriptor. If the call succeeds, and there
79 * was a file descriptor, then @fd@ won't be @-1@ on exit;
80 * otherwise it will. At most one descriptor will be collected.
83 extern ssize_t fdpass_recv(int /*sock*/, int */*fd*/,
84 void */*p*/, size_t /*sz*/);
86 /*----- That's all, folks -------------------------------------------------*/