| Current File : //root/postfix-3.2.0/src/virtual/mailbox.c |
/*++
/* NAME
/* mailbox 3
/* SUMMARY
/* mailbox delivery
/* SYNOPSIS
/* #include "virtual.h"
/*
/* int deliver_mailbox(state, usr_attr, statusp)
/* LOCAL_STATE state;
/* USER_ATTR usr_attr;
/* int *statusp;
/* DESCRIPTION
/* deliver_mailbox() delivers to UNIX-style mailbox or to maildir.
/*
/* A zero result means that the named user was not found.
/*
/* Arguments:
/* .IP state
/* The attributes that specify the message, recipient and more.
/* .IP usr_attr
/* Attributes describing user rights and mailbox location.
/* .IP statusp
/* Delivery status: see below.
/* DIAGNOSTICS
/* The message delivery status is non-zero when delivery should be tried
/* again.
/* 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 <sys/stat.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
/* Utility library. */
#include <msg.h>
#include <vstring.h>
#include <vstream.h>
#include <mymalloc.h>
#include <stringops.h>
#include <set_eugid.h>
/* Global library. */
#include <mail_copy.h>
#include <mbox_open.h>
#include <defer.h>
#include <sent.h>
#include <mail_params.h>
#include <mail_addr_find.h>
#include <dsn_util.h>
/* Application-specific. */
#include "virtual.h"
#define YES 1
#define NO 0
/* deliver_mailbox_file - deliver to recipient mailbox */
static int deliver_mailbox_file(LOCAL_STATE state, USER_ATTR usr_attr)
{
const char *myname = "deliver_mailbox_file";
DSN_BUF *why = state.msg_attr.why;
MBOX *mp;
int mail_copy_status;
int deliver_status;
int copy_flags;
struct stat st;
/*
* Make verbose logging easier to understand.
*/
state.level++;
if (msg_verbose)
MSG_LOG_STATE(myname, state);
/*
* Don't deliver trace-only requests.
*/
if (DEL_REQ_TRACE_ONLY(state.request->flags)) {
dsb_simple(why, "2.0.0", "delivers to mailbox");
return (sent(BOUNCE_FLAGS(state.request),
SENT_ATTR(state.msg_attr)));
}
/*
* 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.rcpt.address;
mail_copy_status = MAIL_COPY_STAT_WRITE;
/*
* Lock the mailbox and open/create the mailbox file.
*
* Write the file as the recipient, so that file quota work.
*/
copy_flags = MAIL_COPY_MBOX;
set_eugid(usr_attr.uid, usr_attr.gid);
mp = mbox_open(usr_attr.mailbox, O_APPEND | O_WRONLY | O_CREAT,
S_IRUSR | S_IWUSR, &st, -1, -1,
virtual_mbox_lock_mask, "4.2.0", why);
if (mp != 0) {
if (S_ISREG(st.st_mode) == 0) {
vstream_fclose(mp->fp);
msg_warn("recipient %s: destination %s is not a regular file",
state.msg_attr.rcpt.address, usr_attr.mailbox);
dsb_simple(why, "5.3.5", "mail system configuration error");
} else if (var_strict_mbox_owner && st.st_uid != usr_attr.uid) {
vstream_fclose(mp->fp);
dsb_simple(why, "4.2.0",
"destination %s is not owned by recipient", usr_attr.mailbox);
msg_warn("specify \"%s = no\" to ignore mailbox ownership mismatch",
VAR_STRICT_MBOX_OWNER);
} else {
if (vstream_fseek(mp->fp, (off_t) 0, SEEK_END) < 0)
msg_fatal("%s: seek queue file %s: %m",
myname, VSTREAM_PATH(mp->fp));
mail_copy_status = mail_copy(COPY_ATTR(state.msg_attr), mp->fp,
copy_flags, "\n", why);
}
mbox_release(mp);
}
set_eugid(var_owner_uid, var_owner_gid);
/*
* As the mail system, bounce, defer delivery, or report success.
*/
if (mail_copy_status & MAIL_COPY_STAT_CORRUPT) {
deliver_status = DEL_STAT_DEFER;
} else if (mail_copy_status != 0) {
vstring_sprintf_prepend(why->reason, "delivery failed to mailbox %s: ",
usr_attr.mailbox);
deliver_status =
(STR(why->status)[0] == '4' ?
defer_append : bounce_append)
(BOUNCE_FLAGS(state.request),
BOUNCE_ATTR(state.msg_attr));
} else {
dsb_simple(why, "2.0.0", "delivered to mailbox");
deliver_status = sent(BOUNCE_FLAGS(state.request),
SENT_ATTR(state.msg_attr));
}
return (deliver_status);
}
/* deliver_mailbox - deliver to recipient mailbox */
int deliver_mailbox(LOCAL_STATE state, USER_ATTR usr_attr, int *statusp)
{
const char *myname = "deliver_mailbox";
const char *mailbox_res;
const char *uid_res;
const char *gid_res;
DSN_BUF *why = state.msg_attr.why;
long n;
/*
* Make verbose logging easier to understand.
*/
state.level++;
if (msg_verbose)
MSG_LOG_STATE(myname, state);
/*
* Sanity check.
*/
if (*var_virt_mailbox_base != '/')
msg_fatal("do not specify relative pathname: %s = %s",
VAR_VIRT_MAILBOX_BASE, var_virt_mailbox_base);
/*
* Look up the mailbox location. Bounce if not found, defer in case of
* trouble.
*/
#define IGNORE_EXTENSION ((char **) 0)
mailbox_res = mail_addr_find(virtual_mailbox_maps, state.msg_attr.user,
IGNORE_EXTENSION);
if (mailbox_res == 0) {
if (virtual_mailbox_maps->error == 0)
return (NO);
msg_warn("table %s: lookup %s: %m", virtual_mailbox_maps->title,
state.msg_attr.user);
dsb_simple(why, "4.3.5", "mail system configuration error");
*statusp = defer_append(BOUNCE_FLAGS(state.request),
BOUNCE_ATTR(state.msg_attr));
return (YES);
}
usr_attr.mailbox = concatenate(var_virt_mailbox_base, "/",
mailbox_res, (char *) 0);
#define RETURN(res) { myfree(usr_attr.mailbox); return (res); }
/*
* Look up the mailbox owner rights. Defer in case of trouble.
*/
uid_res = mail_addr_find(virtual_uid_maps, state.msg_attr.user,
IGNORE_EXTENSION);
if (uid_res == 0) {
msg_warn("recipient %s: not found in %s",
state.msg_attr.user, virtual_uid_maps->title);
dsb_simple(why, "4.3.5", "mail system configuration error");
*statusp = defer_append(BOUNCE_FLAGS(state.request),
BOUNCE_ATTR(state.msg_attr));
RETURN(YES);
}
if ((n = atol(uid_res)) < var_virt_minimum_uid) {
msg_warn("recipient %s: bad uid %s in %s",
state.msg_attr.user, uid_res, virtual_uid_maps->title);
dsb_simple(why, "4.3.5", "mail system configuration error");
*statusp = defer_append(BOUNCE_FLAGS(state.request),
BOUNCE_ATTR(state.msg_attr));
RETURN(YES);
}
usr_attr.uid = (uid_t) n;
/*
* Look up the mailbox group rights. Defer in case of trouble.
*/
gid_res = mail_addr_find(virtual_gid_maps, state.msg_attr.user,
IGNORE_EXTENSION);
if (gid_res == 0) {
msg_warn("recipient %s: not found in %s",
state.msg_attr.user, virtual_gid_maps->title);
dsb_simple(why, "4.3.5", "mail system configuration error");
*statusp = defer_append(BOUNCE_FLAGS(state.request),
BOUNCE_ATTR(state.msg_attr));
RETURN(YES);
}
if ((n = atol(gid_res)) <= 0) {
msg_warn("recipient %s: bad gid %s in %s",
state.msg_attr.user, gid_res, virtual_gid_maps->title);
dsb_simple(why, "4.3.5", "mail system configuration error");
*statusp = defer_append(BOUNCE_FLAGS(state.request),
BOUNCE_ATTR(state.msg_attr));
RETURN(YES);
}
usr_attr.gid = (gid_t) n;
if (msg_verbose)
msg_info("%s[%d]: set user_attr: %s, uid = %u, gid = %u",
myname, state.level, usr_attr.mailbox,
(unsigned) usr_attr.uid, (unsigned) usr_attr.gid);
/*
* Deliver to mailbox or to maildir.
*/
#define LAST_CHAR(s) (s[strlen(s) - 1])
if (LAST_CHAR(usr_attr.mailbox) == '/')
*statusp = deliver_maildir(state, usr_attr);
else
*statusp = deliver_mailbox_file(state, usr_attr);
/*
* Cleanup.
*/
RETURN(YES);
}