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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 1999-2002, 2005, 2007-2012, 2014-2016 Free Software
Foundation, Inc.
GNU Mailutils is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
GNU Mailutils is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU Mailutils. If not, see <http://www.gnu.org/licenses/>. */
/* ".forward" support for GNU Maidag */
#include "maidag.h"
/* Auxiliary functions */
/* Forward message MSG to given EMAIL, using MAILER and sender address FROM */
static int
forward_to_email (mu_message_t msg, mu_address_t from,
mu_mailer_t mailer, const char *email)
{
mu_address_t to;
int rc;
rc = mu_address_create (&to, email);
if (rc)
{
mu_error (_("%s: cannot create email: %s"), email, mu_strerror (rc));
return 1;
}
rc = mu_mailer_send_message (mailer, msg, from, to);
if (rc)
mu_error (_("Sending message to `%s' failed: %s"),
email, mu_strerror (rc));
mu_address_destroy (&to);
return rc;
}
/* Create a mailer if it does not already exist.*/
int
forward_mailer_create (mu_mailer_t *pmailer)
{
int rc;
if (*pmailer == NULL)
{
rc = mu_mailer_create (pmailer, NULL);
if (rc)
{
const char *url = NULL;
mu_mailer_get_url_default (&url);
mu_error (_("Creating mailer `%s' failed: %s"),
url, mu_strerror (rc));
return 1;
}
rc = mu_mailer_open (*pmailer, 0);
if (rc)
{
const char *url = NULL;
mu_mailer_get_url_default (&url);
mu_error (_("Opening mailer `%s' failed: %s"),
url, mu_strerror (rc));
mu_mailer_destroy (pmailer);
return 1;
}
}
return 0;
}
/* Create *PFROM (if it is NULL), from the envelope sender address of MSG. */
static int
create_from_address (mu_message_t msg, mu_address_t *pfrom)
{
if (!*pfrom)
{
mu_envelope_t envelope;
const char *str;
int status = mu_message_get_envelope (msg, &envelope);
if (status)
{
mu_error (_("cannot get envelope: %s"), mu_strerror (status));
return 1;
}
status = mu_envelope_sget_sender (envelope, &str);
if (status)
{
mu_error (_("cannot get envelope sender: %s"), mu_strerror (status));
return 1;
}
status = mu_address_create (pfrom, str);
if (status)
{
mu_error (_("%s: cannot create email: %s"), str,
mu_strerror (status));
return 1;
}
}
return 0;
}
/* Forward message MSG as requested by file FILENAME.
MYNAME gives local user name. */
enum maidag_forward_result
process_forward (mu_message_t msg, char *filename, const char *myname)
{
int rc;
mu_stream_t file;
size_t size = 0, n;
char *buf = NULL;
enum maidag_forward_result result = maidag_forward_ok;
mu_mailer_t mailer = NULL;
mu_address_t from = NULL;
rc = mu_file_stream_create (&file, filename, MU_STREAM_READ);
if (rc)
{
mu_error (_("%s: cannot open forward file: %s"),
filename, mu_strerror (rc));
return maidag_forward_error;
}
while (mu_stream_getline (file, &buf, &size, &n) == 0 && n > 0)
{
char *p;
mu_rtrim_class (buf, MU_CTYPE_SPACE);
p = mu_str_skip_class (buf, MU_CTYPE_SPACE);
if (*p && *p != '#')
{
if (strchr (p, '@'))
{
if (create_from_address (msg, &from)
|| forward_mailer_create (&mailer)
|| forward_to_email (msg, from, mailer, p))
result = maidag_forward_error;
}
else
{
if (*p == '\\')
p++;
if (strcmp (p, myname) == 0)
{
if (result == maidag_forward_ok)
result = maidag_forward_metoo;
}
else if (deliver_to_user (msg, p, NULL))
result = maidag_forward_error;
}
}
}
mu_address_destroy (&from);
if (mailer)
{
mu_mailer_close (mailer);
mu_mailer_destroy (&mailer);
}
free (buf);
mu_stream_destroy (&file);
return result;
}
static mu_list_t idlist;
/* Check if the forward file FWFILE for user given by AUTH exists, and if
so, use to to forward message MSG. */
enum maidag_forward_result
maidag_forward (mu_message_t msg, struct mu_auth_data *auth, char *fwfile)
{
struct stat st;
char *filename;
enum maidag_forward_result result = maidag_forward_none;
int rc;
if (fwfile[0] != '/')
{
if (stat (auth->dir, &st))
{
if (errno == ENOENT)
/* FIXME: a warning, maybe? */;
else if (!S_ISDIR (st.st_mode))
mu_error (_("%s: not a directory"), auth->dir);
else
mu_error (_("%s: cannot stat directory: %s"),
auth->dir, mu_strerror (errno));
return maidag_forward_none;
}
filename = mu_make_file_name (auth->dir, fwfile);
}
else
filename = strdup (fwfile);
if (!filename)
{
mu_error ("%s", mu_strerror (errno));
return maidag_forward_error;
}
if (!idlist)
mu_list_create (&idlist);
rc = mu_file_safety_check (filename, forward_file_checks,
auth->uid, idlist);
if (rc == 0)
result = process_forward (msg, filename, auth->name);
else if (rc == MU_ERR_EXISTS)
mu_diag_output (MU_DIAG_NOTICE,
_("skipping forward file %s: already processed"),
filename);
else
mu_error (_("ignoring forward file %s: %s"),
filename, mu_strerror (rc));
free (filename);
return result;
}
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