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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 1999-2025 Free Software Foundation, Inc.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 3 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General
Public License along with this library. If not, see
<http://www.gnu.org/licenses/>. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#ifdef ENABLE_MH
#include <sys/types.h>
#include <sys/stat.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <dirent.h>
#include <mailutils/sys/url.h>
#include <mailutils/sys/folder.h>
#include <mailutils/sys/registrar.h>
#include <mailutils/sys/amd.h>
#include <mailutils/util.h>
#include <mailutils/cctype.h>
/* Check if NAME is a valid MH message name */
static int
mh_message_name_p (const char *name)
{
for ( ; *name; name++)
if (!mu_isdigit (*name))
return 0;
return 1;
}
/* Check if directory NAME is a valid MH folder directory */
static int
mh_dir_p (const char *name)
{
DIR *dir;
struct dirent *entry;
int result = 0;
dir = opendir (name);
if (!dir)
return 1; /* Maybe yes */
while (!result && (entry = readdir (dir)))
{
char *pname;
struct stat st;
int rc;
if (entry->d_name[0] == '.'
&& (entry->d_name[1] == 0
|| (entry->d_name[1] == '.' && entry->d_name[2] == 0)))
continue;
pname = mu_make_file_name (name, entry->d_name);
if (!pname)
continue;
rc = stat (pname, &st);
free (pname);
if (rc || !S_ISREG (st.st_mode))
continue;
switch (entry->d_name[0])
{
case '.':
result = strcmp (entry->d_name, ".mh_sequences") == 0;
break;
case ',':
result = mh_message_name_p (entry->d_name + 1);
break;
default:
result = mh_message_name_p (entry->d_name);
break;
}
}
closedir (dir);
return result;
}
static int
_mh_is_scheme (mu_record_t record, mu_url_t url, int flags)
{
int rc = 0;
int scheme_matched = mu_url_is_scheme (url, record->scheme);
if (scheme_matched || mu_scheme_autodetect_p (url))
{
/* Attempt auto-detection */
const char *path;
struct stat st;
if (mu_url_sget_path (url, &path))
return 0;
if (stat (path, &st) < 0)
{
if (errno == ENOENT && scheme_matched)
return MU_FOLDER_ATTRIBUTE_ALL & flags;
return 0; /* mu_mailbox_open will complain*/
}
if (!S_ISDIR (st.st_mode))
return 0;
if (scheme_matched)
rc = MU_FOLDER_ATTRIBUTE_ALL;
else
{
rc |= MU_FOLDER_ATTRIBUTE_DIRECTORY;
if ((flags & MU_FOLDER_ATTRIBUTE_FILE) && mh_dir_p (path))
rc |= MU_FOLDER_ATTRIBUTE_FILE;
}
}
return rc & flags;
}
static int
_mh_list_p (mu_record_t record, const char *name, int flags)
{
if (name[0] == ',' ||
((strlen (name) > 3) &&
(memcmp (name, ".mh", 3) == 0 || memcmp (name, ".mu", 3) == 0)))
return 0;
if (flags == MU_FOLDER_ATTRIBUTE_DIRECTORY)
return 1;
for (; *name; name++)
if (!mu_isdigit (*name))
return 1;
return 0;
}
static struct _mu_record _mh_record =
{
MU_MH_PRIO,
MU_MH_SCHEME,
MU_RECORD_LOCAL,
MU_URL_SCHEME | MU_URL_PATH | MU_URL_PARAM,
MU_URL_PATH,
mu_url_expand_path, /* Url init. */
_mailbox_mh_init, /* Mailbox init. */
NULL, /* Mailer init. */
_mu_fsfolder_init, /* Folder init. */
NULL, /* back pointer. */
_mh_is_scheme, /* _is_scheme method. */
NULL, /* _get_url method. */
NULL, /* _get_mailbox method. */
NULL, /* _get_mailer method. */
NULL, /* _get_folder method. */
_mh_list_p
};
mu_record_t mu_mh_record = &_mh_record;
#else
#include <stdio.h>
#include <mailutils/sys/registrar.h>
mu_record_t mu_mh_record = NULL;
#endif
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