156 lines
3.9 KiB
C
156 lines
3.9 KiB
C
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
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/* camel-provider.c: provider framework */
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/*
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*
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* Authors:
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* Bertrand Guiheneuf <bertrand@helixcode.com>
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* Dan Winship <danw@ximian.com>
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* Jeffrey Stedfast <fejj@ximian.com>
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*
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* Copyright 1999, 2000 Ximian, Inc. (www.ximian.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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* USA
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*/
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/* FIXME: Shouldn't we add a version number to providers ? */
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <dirent.h>
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#include <errno.h>
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#include <stdio.h>
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#include <string.h>
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#include <gmodule.h>
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#include "camel-provider.h"
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#include "camel-exception.h"
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#include "hash-table-utils.h"
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/**
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* camel_provider_init:
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*
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* Initialize the Camel provider system by reading in the .urls
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* files in the provider directory and creating a hash table mapping
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* URLs to module names.
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*
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* A .urls file has the same initial prefix as the shared library it
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* correspond to, and consists of a series of lines containing the URL
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* protocols that that library handles.
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*
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* Return value: a hash table mapping URLs to module names
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**/
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GHashTable *
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camel_provider_init (void)
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{
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GHashTable *providers;
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DIR *dir;
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struct dirent *d;
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char *p, *name, buf[80];
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providers = g_hash_table_new (g_strcase_hash, g_strcase_equal);
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dir = opendir (CAMEL_PROVIDERDIR);
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if (!dir) {
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g_error ("Could not open camel provider directory: %s",
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g_strerror (errno));
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return NULL;
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}
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while ((d = readdir (dir))) {
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FILE *fp;
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p = strchr (d->d_name, '.');
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if (!p || strcmp (p, ".urls") != 0)
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continue;
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name = g_strdup_printf ("%s/%s", CAMEL_PROVIDERDIR, d->d_name);
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fp = fopen (name, "r");
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if (!fp) {
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g_warning ("Could not read provider info file %s: %s",
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name, g_strerror (errno));
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g_free (name);
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continue;
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}
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p = strrchr (name, '.');
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strcpy (p, ".so");
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while ((fgets (buf, sizeof (buf), fp))) {
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buf[sizeof (buf) - 1] = '\0';
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p = strchr (buf, '\n');
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if (p)
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*p = '\0';
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if (*buf)
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g_hash_table_insert (providers, g_strdup (buf), g_strdup (name));
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}
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g_free (name);
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fclose (fp);
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}
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closedir (dir);
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return providers;
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}
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/**
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* camel_provider_load:
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* @session: the current session
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* @path: the path to a shared library
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* @ex: a CamelException
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*
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* Loads the provider at @path, and calls its initialization function,
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* passing @session as an argument. The provider should then register
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* itself with @session.
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**/
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void
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camel_provider_load (CamelSession *session, const char *path, CamelException *ex)
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{
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GModule *module;
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CamelProvider *(*camel_provider_module_init) ();
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if (!g_module_supported ()) {
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camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
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_("Could not load %s: Module loading "
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"not supported on this system."),
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path);
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return;
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}
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module = g_module_open (path, 0);
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if (!module) {
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camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
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_("Could not load %s: %s"),
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path, g_module_error ());
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return;
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}
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if (!g_module_symbol (module, "camel_provider_module_init",
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(gpointer *)&camel_provider_module_init)) {
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camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
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_("Could not load %s: No initialization "
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"code in module."), path);
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g_module_close (module);
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return;
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}
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camel_provider_module_init (session);
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}
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