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/* $OpenBSD: sharedqueue.c,v 1.1 2009/01/26 22:20:31 gilles Exp $ */
/*
* Copyright (c) 2008 Gilles Chehade <gilles@openbsd.org>
* Copyright (c) 2008 Pierre-Yves Ritschard <pyr@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/param.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <dirent.h>
#include <errno.h>
#include <event.h>
#include <fcntl.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "smtpd.h"
int
queue_create_layout_message(char *queuepath, char *message_id)
{
char rootdir[MAXPATHLEN];
char evpdir[MAXPATHLEN];
if (! bsnprintf(rootdir, MAXPATHLEN, "%s/%d.XXXXXXXXXXXXXXXX",
queuepath, time(NULL)))
fatalx("queue_create_layout_message: snprintf");
if (mkdtemp(rootdir) == NULL) {
if (errno == ENOSPC)
return 0;
fatal("queue_create_layout_message: mkdtemp");
}
if (strlcpy(message_id, rootdir + strlen(queuepath) + 1, MAXPATHLEN)
>= MAXPATHLEN)
fatalx("queue_create_layout_message: truncation");
if (! bsnprintf(evpdir, MAXPATHLEN, "%s%s", rootdir, PATH_ENVELOPES))
fatalx("queue_create_layout_message: snprintf");
if (mkdir(evpdir, 0700) == -1) {
if (errno == ENOSPC) {
rmdir(rootdir);
return 0;
}
fatal("queue_create_layout_message: mkdir");
}
return 1;
}
void
queue_delete_layout_message(char *queuepath, char *msgid)
{
char rootdir[MAXPATHLEN];
char purgedir[MAXPATHLEN];
if (! bsnprintf(rootdir, MAXPATHLEN, "%s/%s", queuepath, msgid))
fatalx("snprintf");
if (! bsnprintf(purgedir, MAXPATHLEN, "%s/%s", PATH_PURGE, msgid))
fatalx("snprintf");
if (rename(rootdir, purgedir) == -1) {
if (errno == ENOENT)
return;
fatal("queue_delete_incoming_message: rename");
}
}
int
queue_record_layout_envelope(char *queuepath, struct message *message)
{
char evpname[MAXPATHLEN];
FILE *fp;
int fd;
again:
if (! bsnprintf(evpname, MAXPATHLEN, "%s/%s%s/%s.%qu", queuepath,
message->message_id, PATH_ENVELOPES, message->message_id,
(u_int64_t)arc4random()))
fatalx("queue_record_incoming_envelope: snprintf");
fd = open(evpname, O_WRONLY|O_CREAT|O_EXCL, 0600);
if (fd == -1) {
if (errno == EEXIST)
goto again;
if (errno == ENOSPC || errno == ENFILE)
goto tempfail;
fatal("queue_record_incoming_envelope: open");
}
fp = fdopen(fd, "w");
if (fp == NULL)
fatal("queue_record_incoming_envelope: fdopen");
message->creation = time(NULL);
if (strlcpy(message->message_uid, strrchr(evpname, '/') + 1, MAXPATHLEN)
>= MAXPATHLEN)
fatalx("queue_record_incoming_envelope: truncation");
if (fwrite(message, sizeof (struct message), 1, fp) != 1) {
if (errno == ENOSPC)
goto tempfail;
fatal("queue_record_incoming_envelope: write");
}
if (! safe_fclose(fp))
goto tempfail;
return 1;
tempfail:
unlink(evpname);
close(fd);
message->creation = 0;
message->message_uid[0] = '\0';
return 0;
}
int
queue_remove_layout_envelope(char *queuepath, struct message *message)
{
char pathname[MAXPATHLEN];
if (! bsnprintf(pathname, MAXPATHLEN, "%s/%s%s/%s", queuepath,
message->message_id, PATH_ENVELOPES, message->message_uid))
fatal("queue_remove_incoming_envelope: snprintf");
if (unlink(pathname) == -1)
if (errno != ENOENT)
fatal("queue_remove_incoming_envelope: unlink");
return 1;
}
int
queue_commit_layout_message(char *queuepath, struct message *messagep)
{
char rootdir[MAXPATHLEN];
char queuedir[MAXPATHLEN];
if (! bsnprintf(rootdir, MAXPATHLEN, "%s/%s", queuepath,
messagep->message_id))
fatal("queue_commit_message_incoming: snprintf");
if (! bsnprintf(queuedir, MAXPATHLEN, "%s/%d", PATH_QUEUE,
queue_hash(messagep->message_id)))
fatal("queue_commit_message_incoming: snprintf");
if (mkdir(queuedir, 0700) == -1) {
if (errno == ENOSPC)
return 0;
if (errno != EEXIST)
fatal("queue_commit_message_incoming: mkdir");
}
if (strlcat(queuedir, "/", MAXPATHLEN) >= MAXPATHLEN ||
strlcat(queuedir, messagep->message_id, MAXPATHLEN) >= MAXPATHLEN)
fatalx("queue_commit_incoming_message: truncation");
if (rename(rootdir, queuedir) == -1) {
if (errno == ENOSPC)
return 0;
fatal("queue_commit_message_incoming: rename");
}
return 1;
}
int
queue_open_layout_messagefile(char *queuepath, struct message *messagep)
{
char pathname[MAXPATHLEN];
mode_t mode = O_CREAT|O_EXCL|O_RDWR;
if (! bsnprintf(pathname, MAXPATHLEN, "%s/%s/message", queuepath,
messagep->message_id))
fatal("queue_open_incoming_message_file: snprintf");
return open(pathname, mode, 0600);
}
u_int16_t
queue_hash(char *msgid)
{
u_int16_t h;
for (h = 5381; *msgid; msgid++)
h = ((h << 5) + h) + *msgid;
return (h % DIRHASH_BUCKETS);
}
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