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/* $Id: privsep.c,v 1.11 2007/07/25 22:05:06 nicm Exp $ */
/*
* Copyright (c) 2006 Nicholas Marriott <nicm@users.sourceforge.net>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include "fdm.h"
int
privsep_send(struct io *io, struct msg *msg, struct msgbuf *msgbuf)
{
char *cause;
msg->size = 0;
if (msgbuf != NULL && msgbuf->buf != NULL && msgbuf->len > 0)
msg->size = msgbuf->len;
io_write(io, msg, sizeof *msg);
if (io_flush(io, INFTIM, &cause) != 0)
return (-1);
if (msg->size != 0) {
io_write(io, msgbuf->buf, msgbuf->len);
if (io_flush(io, INFTIM, &cause) != 0)
return (-1);
}
return (0);
}
int
privsep_check(struct io *io)
{
return (IO_RDSIZE(io) >= sizeof (struct msg));
}
int
privsep_recv(struct io *io, struct msg *msg, struct msgbuf *msgbuf)
{
if (msgbuf != NULL) {
msgbuf->buf = NULL;
msgbuf->len = 0;
}
if (io_wait(io, sizeof *msg, INFTIM, NULL) != 0)
return (-1);
if (io_read2(io, msg, sizeof *msg) != 0)
return (-1);
if (msg->size == 0)
return (0);
if (msgbuf == NULL)
return (-1);
msgbuf->len = msg->size;
if (io_wait(io, msgbuf->len, INFTIM, NULL) != 0)
return (-1);
if ((msgbuf->buf = io_read(io, msgbuf->len)) == NULL)
return (-1);
return (0);
}
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