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/* $OpenBSD: delivery_maildir.c,v 1.18 2016/08/31 10:18:08 gilles Exp $ */ |
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/* |
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* Copyright (c) 2011 Gilles Chehade <gilles@poolp.org> |
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* |
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* Permission to use, copy, modify, and distribute this software for any |
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* purpose with or without fee is hereby granted, provided that the above |
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* copyright notice and this permission notice appear in all copies. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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*/ |
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#include <sys/types.h> |
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#include <sys/queue.h> |
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#include <sys/tree.h> |
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#include <sys/socket.h> |
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#include <sys/stat.h> |
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#include <ctype.h> |
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#include <err.h> |
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#include <errno.h> |
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#include <event.h> |
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#include <fcntl.h> |
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#include <imsg.h> |
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#include <paths.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <time.h> |
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#include <unistd.h> |
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#include <limits.h> |
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#include "smtpd.h" |
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#include "log.h" |
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extern char **environ; |
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/* maildir backend */ |
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static void delivery_maildir_open(struct deliver *); |
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static int mailaddr_tag(const struct mailaddr *, char *, size_t); |
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struct delivery_backend delivery_backend_maildir = { |
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1, delivery_maildir_open |
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}; |
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static int |
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mailaddr_tag(const struct mailaddr *maddr, char *dest, size_t len) |
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{ |
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char *tag; |
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char *sanitized; |
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if ((tag = strchr(maddr->user, *env->sc_subaddressing_delim))) { |
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tag++; |
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while (*tag == '.') |
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tag++; |
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} |
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if (tag == NULL) |
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return 1; |
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if (strlcpy(dest, tag, len) >= len) |
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return 0; |
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for (sanitized = dest; *sanitized; sanitized++) |
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if (strchr(MAILADDR_ESCAPE, *sanitized)) |
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*sanitized = ':'; |
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return 1; |
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} |
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static void |
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delivery_maildir_open(struct deliver *deliver) |
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{ |
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char tmp[PATH_MAX], new[PATH_MAX], tag[PATH_MAX]; |
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int ch, fd; |
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FILE *fp; |
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char *msg; |
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int n; |
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const char *chd; |
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struct mailaddr maddr; |
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struct stat sb; |
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#define error(m) { msg = m; goto err; } |
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#define error2(m) { msg = m; goto err2; } |
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setproctitle("maildir delivery"); |
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memset(&maddr, 0, sizeof maddr); |
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if (!text_to_mailaddr(&maddr, deliver->dest)) |
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error("cannot parse destination address"); |
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memset(tag, 0, sizeof tag); |
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if (!mailaddr_tag(&maddr, tag, sizeof tag)) |
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error("cannot extract tag from destination address"); |
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if (mkdirs(deliver->to, 0700) < 0 && errno != EEXIST) |
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error("cannot mkdir maildir"); |
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chd = deliver->to; |
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if (tag[0]) { |
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(void)snprintf(tmp, sizeof tmp, "%s/.%s", deliver->to, tag); |
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if (stat(tmp, &sb) != -1) |
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chd = tmp; |
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} |
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if (chdir(chd) < 0) |
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error("cannot cd to maildir"); |
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if (mkdir("cur", 0700) < 0 && errno != EEXIST) |
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error("mkdir cur failed"); |
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if (mkdir("tmp", 0700) < 0 && errno != EEXIST) |
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error("mkdir tmp failed"); |
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if (mkdir("new", 0700) < 0 && errno != EEXIST) |
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error("mkdir new failed"); |
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(void)snprintf(tmp, sizeof tmp, "tmp/%lld.%d.%s", |
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(long long int) time(NULL), |
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getpid(), env->sc_hostname); |
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fd = open(tmp, O_CREAT | O_EXCL | O_WRONLY, 0600); |
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if (fd < 0) |
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error("cannot open tmp file"); |
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fp = fdopen(fd, "w"); |
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if (fp == NULL) |
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error2("fdopen"); |
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while ((ch = getc(stdin)) != EOF) |
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if (putc(ch, fp) == EOF) |
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break; |
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if (ferror(stdin)) |
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error2("read error"); |
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if (fflush(fp) == EOF || ferror(fp)) |
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error2("write error"); |
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if (fsync(fd) < 0) |
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error2("fsync"); |
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if (fclose(fp) == EOF) |
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error2("fclose"); |
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(void)snprintf(new, sizeof new, "new/%s", tmp + 4); |
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if (rename(tmp, new) < 0) |
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error2("cannot rename tmp->new"); |
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_exit(0); |
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err2: |
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n = errno; |
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unlink(tmp); |
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errno = n; |
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err: |
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perror(msg); |
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_exit(1); |
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} |