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/* $OpenBSD: queue_null.c,v 1.2 2013/05/24 17:03:14 eric Exp $ */
/*
* Copyright (c) 2012 Eric Faurot <eric@openbsd.org>
*
* 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 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 <sys/queue.h>
#include <sys/tree.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <event.h>
#include <fcntl.h>
#include <imsg.h>
#include <inttypes.h>
#include <libgen.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include "smtpd.h"
#include "log.h"
static int queue_null_init(int);
static int queue_null_message(enum queue_op, uint32_t *);
static int queue_null_envelope(enum queue_op , uint64_t *, char *, size_t);
struct queue_backend queue_backend_null = {
queue_null_init,
queue_null_message,
queue_null_envelope,
};
static int devnull;
static int
queue_null_init(int server)
{
devnull = open("/dev/null", O_WRONLY, 0777);
if (devnull == -1) {
log_warn("open");
return (0);
}
return (1);
}
static int
queue_null_message(enum queue_op qop, uint32_t *msgid)
{
switch (qop) {
case QOP_CREATE:
*msgid = queue_generate_msgid();
return (1);
case QOP_DELETE:
case QOP_COMMIT:
return (1);
case QOP_FD_R:
return (-1);
case QOP_FD_RW:
return dup(devnull);
case QOP_CORRUPT:
return (0);
default:
fatalx("queue_null_message: unsupported operation.");
}
return (0);
}
static int
queue_null_envelope(enum queue_op qop, uint64_t *evpid, char *buf, size_t len)
{
uint32_t msgid;
if (qop == QOP_WALK)
return (-1);
switch (qop) {
case QOP_CREATE:
msgid = evpid_to_msgid(*evpid);
*evpid = queue_generate_evpid(msgid);
return (1);
case QOP_DELETE:
return (1);
case QOP_LOAD:
return (0);
case QOP_UPDATE:
return (1);
default:
fatalx("queue_null_envelope: unsupported operation.");
}
return (0);
}
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