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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* camel-provider.c: provider framework */
/*
*
* Authors:
* Bertrand Guiheneuf <bertrand@helixcode.com>
* Dan Winship <danw@ximian.com>
* Jeffrey Stedfast <fejj@ximian.com>
*
* Copyright 1999, 2000 Ximian, Inc. (www.ximian.com)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of version 2 of the GNU General Public
* License as published by the Free Software Foundation.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*/
/* FIXME: Shouldn't we add a version number to providers ? */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <sys/types.h>
#include <dirent.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <gmodule.h>
#include "camel-provider.h"
#include "camel-exception.h"
#include "camel-string-utils.h"
/**
* camel_provider_init:
*
* Initialize the Camel provider system by reading in the .urls
* files in the provider directory and creating a hash table mapping
* URLs to module names.
*
* A .urls file has the same initial prefix as the shared library it
* correspond to, and consists of a series of lines containing the URL
* protocols that that library handles.
*
* Return value: a hash table mapping URLs to module names
**/
GHashTable *
camel_provider_init (void)
{
GHashTable *providers;
DIR *dir;
struct dirent *d;
char *p, *name, buf[80];
providers = g_hash_table_new (camel_strcase_hash, camel_strcase_equal);
dir = opendir (CAMEL_PROVIDERDIR);
if (!dir) {
g_error ("Could not open camel provider directory (%s): %s",
CAMEL_PROVIDERDIR, g_strerror (errno));
return NULL;
}
while ((d = readdir (dir))) {
FILE *fp;
p = strchr (d->d_name, '.');
if (!p || strcmp (p, ".urls") != 0)
continue;
name = g_strdup_printf ("%s/%s", CAMEL_PROVIDERDIR, d->d_name);
fp = fopen (name, "r");
if (!fp) {
g_warning ("Could not read provider info file %s: %s",
name, g_strerror (errno));
g_free (name);
continue;
}
p = strrchr (name, '.');
strcpy (p, ".so");
while ((fgets (buf, sizeof (buf), fp))) {
buf[sizeof (buf) - 1] = '\0';
p = strchr (buf, '\n');
if (p)
*p = '\0';
if (*buf)
g_hash_table_insert (providers, g_strdup (buf), g_strdup (name));
}
g_free (name);
fclose (fp);
}
closedir (dir);
return providers;
}
/**
* camel_provider_load:
* @session: the current session
* @path: the path to a shared library
* @ex: a CamelException
*
* Loads the provider at @path, and calls its initialization function,
* passing @session as an argument. The provider should then register
* itself with @session.
**/
void
camel_provider_load (CamelSession *session, const char *path, CamelException *ex)
{
GModule *module;
CamelProvider *(*camel_provider_module_init) ();
if (!g_module_supported ()) {
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
_("Could not load %s: Module loading "
"not supported on this system."),
path);
return;
}
module = g_module_open (path, 0);
if (!module) {
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
_("Could not load %s: %s"),
path, g_module_error ());
return;
}
if (!g_module_symbol (module, "camel_provider_module_init",
(gpointer *)&camel_provider_module_init)) {
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
_("Could not load %s: No initialization "
"code in module."), path);
g_module_close (module);
return;
}
camel_provider_module_init (session);
}
/**
* camel_provider_auto_detect:
* @provider: camel provider
* @settings: currently set settings
* @auto_detected: output hash table of auto-detected values
* @ex: exception
*
* After filling in the standard Username/Hostname/Port/Path settings
* (which must be set in @settings), if the provider supports it, you
* may wish to have the provider auto-detect further settings based on
* the aformentioned settings.
*
* If the provider does not support auto-detection, @auto_detected
* will be set to %NULL. Otherwise the provider will attempt to
* auto-detect whatever it can and file them into @auto_detected. If
* for some reason it cannot auto-detect anything (not enough
* information provided in @settings?) then @auto_deetected will be
* set to %NULL and an exception may be set to explain why it failed.
*
* Returns 0 on success or -1 on fail.
**/
int
camel_provider_auto_detect (CamelProvider *provider, CamelURL *url,
GHashTable **auto_detected, CamelException *ex)
{
g_return_val_if_fail (provider != NULL, -1);
if (provider->auto_detect) {
return provider->auto_detect (url, auto_detected, ex);
} else {
*auto_detected = NULL;
return 0;
}
}
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