NetBSD/gnu/dist/postfix/local/maildir.c

168 lines
4.7 KiB
C

/*++
/* NAME
/* maildir 3
/* SUMMARY
/* delivery to maildir
/* SYNOPSIS
/* #include "local.h"
/*
/* int deliver_maildir(state, usr_attr, path)
/* LOCAL_STATE state;
/* USER_ATTR usr_attr;
/* char *path;
/* DESCRIPTION
/* deliver_maildir() delivers a message to a qmail maildir.
/*
/* Arguments:
/* .IP state
/* The attributes that specify the message, recipient and more.
/* Attributes describing alias, include or forward expansion.
/* A table with the results from expanding aliases or lists.
/* .IP usr_attr
/* Attributes describing user rights and environment information.
/* .IP path
/* The maildir to deliver to, including trailing slash.
/* DIAGNOSTICS
/* deliver_maildir() always succeeds or it bounces the message.
/* SEE ALSO
/* bounce(3)
/* LICENSE
/* .ad
/* .fi
/* The Secure Mailer license must be distributed with this software.
/* AUTHOR(S)
/* Wietse Venema
/* IBM T.J. Watson Research
/* P.O. Box 704
/* Yorktown Heights, NY 10598, USA
/*--*/
/* System library. */
#include "sys_defs.h"
#include <unistd.h>
#include <errno.h>
/* Utility library. */
#include <msg.h>
#include <mymalloc.h>
#include <stringops.h>
#include <vstream.h>
#include <vstring.h>
#include <make_dirs.h>
#include <set_eugid.h>
#include <get_hostname.h>
#include <sane_fsops.h>
/* Global library. */
#include <mail_copy.h>
#include <bounce.h>
#include <sent.h>
#include <mail_params.h>
/* Application-specific. */
#include "local.h"
/* deliver_maildir - delivery to maildir-style mailbox */
int deliver_maildir(LOCAL_STATE state, USER_ATTR usr_attr, char *path)
{
char *myname = "deliver_maildir";
char *newdir;
char *tmpdir;
char *curdir;
char *tmpfile;
char *newfile;
VSTRING *why;
VSTRING *buf;
VSTREAM *dst;
int status;
int copy_flags;
static int count;
/*
* Make verbose logging easier to understand.
*/
state.level++;
if (msg_verbose)
MSG_LOG_STATE(myname, state);
/*
* Initialize. Assume the operation will fail. Set the delivered
* attribute to reflect the final recipient.
*/
if (vstream_fseek(state.msg_attr.fp, state.msg_attr.offset, SEEK_SET) < 0)
msg_fatal("seek message file %s: %m", VSTREAM_PATH(state.msg_attr.fp));
state.msg_attr.delivered = state.msg_attr.recipient;
status = -1;
buf = vstring_alloc(100);
why = vstring_alloc(100);
copy_flags = MAIL_COPY_TOFILE | MAIL_COPY_RETURN_PATH;
if (local_deliver_hdr_mask & DELIVER_HDR_FILE)
copy_flags |= MAIL_COPY_DELIVERED;
newdir = concatenate(path, "new/", (char *) 0);
tmpdir = concatenate(path, "tmp/", (char *) 0);
curdir = concatenate(path, "cur/", (char *) 0);
/*
* Create and write the file as the recipient, so that file quota work.
* Create any missing directories on the fly. The file name is chosen
* according to ftp://koobera.math.uic.edu/www/proto/maildir.html:
*
* "A unique name has three pieces, separated by dots. On the left is the
* result of time(). On the right is the result of gethostname(). In the
* middle is something that doesn't repeat within one second on a single
* host. I fork a new process for each delivery, so I just use the
* process ID. If you're delivering several messages from one process,
* use starttime.pid_count.host, where starttime is the time that your
* process started, and count is the number of messages you've
* delivered."
*/
#define STR vstring_str
set_eugid(usr_attr.uid, usr_attr.gid);
vstring_sprintf(buf, "%ld.%d_%d.%s", (long) var_starttime,
var_pid, count++, get_hostname());
tmpfile = concatenate(tmpdir, STR(buf), (char *) 0);
newfile = concatenate(newdir, STR(buf), (char *) 0);
if ((dst = vstream_fopen(tmpfile, O_WRONLY | O_CREAT | O_EXCL, 0600)) == 0
&& (errno != ENOENT
|| make_dirs(tmpdir, 0700) < 0
|| (dst = vstream_fopen(tmpfile, O_WRONLY | O_CREAT | O_EXCL, 0600)) == 0)) {
vstring_sprintf(why, "create %s: %m", tmpfile);
} else {
if (mail_copy(COPY_ATTR(state.msg_attr), dst, copy_flags, why) == 0) {
if (sane_link(tmpfile, newfile) < 0
&& (errno != ENOENT
|| (make_dirs(curdir, 0700), make_dirs(newdir, 0700)) < 0
|| sane_link(tmpfile, newfile) < 0)) {
vstring_sprintf(why, "link to %s: %m", newfile);
} else {
if (unlink(tmpfile) < 0)
msg_warn("remove %s: %m", tmpfile);
status = 0;
}
}
}
set_eugid(var_owner_uid, var_owner_gid);
if (status)
bounce_append(BOUNCE_FLAG_KEEP, BOUNCE_ATTR(state.msg_attr),
"maildir delivery failed: %s", vstring_str(why));
else
sent(SENT_ATTR(state.msg_attr), "maildir");
vstring_free(buf);
vstring_free(why);
myfree(newdir);
myfree(tmpdir);
myfree(curdir);
myfree(tmpfile);
myfree(newfile);
return (0);
}