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/* $OpenBSD: delivery_maildir.c,v 1.18 2016/08/31 10:18:08 gilles Exp $ */
/*
* Copyright (c) 2011 Gilles Chehade <gilles@poolp.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 <paths.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <limits.h>
#include "smtpd.h"
#include "log.h"
extern char **environ;
/* maildir backend */
static void delivery_maildir_open(struct deliver *);
static int mailaddr_tag(const struct mailaddr *, char *, size_t);
struct delivery_backend delivery_backend_maildir = {
1, delivery_maildir_open
};
static int
mailaddr_tag(const struct mailaddr *maddr, char *dest, size_t len)
{
char *tag;
char *sanitized;
if ((tag = strchr(maddr->user, *env->sc_subaddressing_delim))) {
tag++;
while (*tag == '.')
tag++;
}
if (tag == NULL)
return 1;
if (strlcpy(dest, tag, len) >= len)
return 0;
for (sanitized = dest; *sanitized; sanitized++)
if (strchr(MAILADDR_ESCAPE, *sanitized))
*sanitized = ':';
return 1;
}
static void
delivery_maildir_open(struct deliver *deliver)
{
char tmp[PATH_MAX], new[PATH_MAX], tag[PATH_MAX];
int ch, fd;
FILE *fp;
char *msg;
int n;
const char *chd;
struct mailaddr maddr;
struct stat sb;
#define error(m) { msg = m; goto err; }
#define error2(m) { msg = m; goto err2; }
setproctitle("maildir delivery");
memset(&maddr, 0, sizeof maddr);
if (!text_to_mailaddr(&maddr, deliver->dest))
error("cannot parse destination address");
memset(tag, 0, sizeof tag);
if (!mailaddr_tag(&maddr, tag, sizeof tag))
error("cannot extract tag from destination address");
if (mkdirs(deliver->to, 0700) < 0 && errno != EEXIST)
error("cannot mkdir maildir");
chd = deliver->to;
if (tag[0]) {
(void)snprintf(tmp, sizeof tmp, "%s/.%s", deliver->to, tag);
if (stat(tmp, &sb) != -1)
chd = tmp;
}
if (chdir(chd) < 0)
error("cannot cd to maildir");
if (mkdir("cur", 0700) < 0 && errno != EEXIST)
error("mkdir cur failed");
if (mkdir("tmp", 0700) < 0 && errno != EEXIST)
error("mkdir tmp failed");
if (mkdir("new", 0700) < 0 && errno != EEXIST)
error("mkdir new failed");
(void)snprintf(tmp, sizeof tmp, "tmp/%lld.%d.%s",
(long long int) time(NULL),
getpid(), env->sc_hostname);
fd = open(tmp, O_CREAT | O_EXCL | O_WRONLY, 0600);
if (fd < 0)
error("cannot open tmp file");
fp = fdopen(fd, "w");
if (fp == NULL)
error2("fdopen");
while ((ch = getc(stdin)) != EOF)
if (putc(ch, fp) == EOF)
break;
if (ferror(stdin))
error2("read error");
if (fflush(fp) == EOF || ferror(fp))
error2("write error");
if (fsync(fd) < 0)
error2("fsync");
if (fclose(fp) == EOF)
error2("fclose");
(void)snprintf(new, sizeof new, "new/%s", tmp + 4);
if (rename(tmp, new) < 0)
error2("cannot rename tmp->new");
_exit(0);
err2:
n = errno;
unlink(tmp);
errno = n;
err:
perror(msg);
_exit(1);
}
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