retain.c
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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 1999, 2001, 2002, 2004 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 2, 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, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
MA 02110-1301 USA */
#include "mail.h"
static list_t retained_headers = NULL;
static list_t ignored_headers = NULL;
static list_t unfolded_headers = NULL;
static list_t sender_headers = NULL;
static int
process_list (int argc, char **argv,
list_t *list,
void (*fun) (list_t *, char *),
char *msg)
{
if (argc == 1)
{
if (list_is_empty (*list))
fprintf (ofile, _(msg));
else
util_slist_print (*list, 1);
return 0;
}
while (--argc)
fun (list, *++argv);
return 0;
}
/*
* ret[ain] [heder-field...]
*/
int
mail_retain (int argc, char **argv)
{
return process_list (argc, argv, &retained_headers,
util_slist_add,
N_("No fields are currently being retained\n"));
}
/*
* di[scard] [header-field...]
* ig[nore] [header-field...]
*/
int
mail_discard (int argc, char **argv)
{
return process_list (argc, argv, &ignored_headers,
util_slist_add,
N_("No fields are currently being ignored\n"));
return 0;
}
/*
* unfold [header-field...]
*/
int
mail_unfold (int argc, char **argv)
{
return process_list (argc, argv, &unfolded_headers,
util_slist_add,
N_("No fields are currently being unfolded\n"));
}
/*
* nounfold [header-field...]
*/
int
mail_nounfold (int argc, char **argv)
{
return process_list (argc, argv, &unfolded_headers,
util_slist_remove,
N_("No fields are currently being unfolded\n"));
}
int
mail_header_is_unfoldable (char *str)
{
return util_slist_lookup (unfolded_headers, str);
}
int
mail_header_is_visible (char *str)
{
if (retained_headers)
return util_slist_lookup (retained_headers, str);
else
return !util_slist_lookup (ignored_headers, str);
}
/*
* sender [header-field...]
*/
int
mail_sender (int argc, char **argv)
{
return process_list (argc, argv, &sender_headers,
util_slist_add,
N_("Sender address is obtained from the envelope\n"));
}
int
mail_nosender (int argc, char **argv)
{
if (argc == 1)
{
util_slist_destroy (&sender_headers);
fprintf (ofile, _("Sender address is obtained from the envelope\n"));
}
else
while (--argc)
util_slist_remove (&sender_headers, *++argv);
return 0;
}
address_t
get_sender_address (message_t msg)
{
iterator_t itr;
header_t header = NULL;
address_t addr = NULL;
if (message_get_header (msg, &header))
return NULL;
if (!sender_headers || list_get_iterator (sender_headers, &itr))
return NULL;
for (iterator_first (itr); !addr && !iterator_is_done (itr);
iterator_next (itr))
{
char *name;
char *buf = NULL;
iterator_current (itr, (void **)&name);
if (header_aget_value (header, name, &buf) == 0)
address_create (&addr, buf);
free (buf);
}
iterator_destroy (&itr);
return addr;
}