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Module loading updates - /LOAD shows now also the statically loaded modules.
You can't /LOAD the same module twice. Syntax changed to /LOAD <module> [<submodule>], /UNLOAD <module> [<submodule>]. NOTE: all modules now need to call register_module() in their init() function. git-svn-id: http://svn.irssi.org/repos/irssi/trunk@1748 dbcabf3a-b0e7-0310-adc4-f8d773084564
This commit is contained in:
Timo Sirainen
cras
parent
f584c1013c
commit
803d805016
23 changed files with 642 additions and 228 deletions
388
src/core/modules-load.c
Normal file
388
src/core/modules-load.c
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/*
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modules-load.c : irssi
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Copyright (C) 1999-2001 Timo Sirainen
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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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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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 USA
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*/
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#include "module.h"
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#include "modules.h"
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#include "modules-load.h"
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#include "signals.h"
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#include "settings.h"
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#include "commands.h"
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#ifdef HAVE_GMODULE
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/* Returns the module name without path, "lib" prefix or ".so" suffix */
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static char *module_get_name(const char *path, int *start, int *end)
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{
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const char *name;
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char *module_name, *ptr;
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name = NULL;
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if (g_path_is_absolute(path)) {
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name = strrchr(path, G_DIR_SEPARATOR);
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if (name != NULL) name++;
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}
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if (name == NULL)
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name = path;
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if (strncmp(name, "lib", 3) == 0)
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name += 3;
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module_name = g_strdup(name);
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ptr = strchr(module_name, '.');
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if (ptr != NULL) *ptr = '\0';
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*start = (int) (name-path);
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*end = *start + (ptr == NULL ? strlen(name) :
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(int) (ptr-module_name));
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return module_name;
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}
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/* Returns the root module name for given submodule (eg. perl_core -> perl) */
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static char *module_get_root(const char *name, char **prefixes)
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{
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int len;
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/* skip any of the prefixes.. */
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while (*prefixes != NULL) {
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len = strlen(*prefixes);
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if (strncmp(name, *prefixes, len) == 0 && name[len] == '_') {
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name += len+1;
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break;
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}
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prefixes++;
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}
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/* skip the _core part */
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len = strlen(name);
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if (len > 5 && strcmp(name+len-5, "_core") == 0)
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return g_strndup(name, len-5);
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return g_strdup(name);
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}
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/* Returns the sub module name for given submodule (eg. perl_core -> core) */
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static char *module_get_sub(const char *name, const char *root)
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{
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int rootlen, namelen;
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namelen = strlen(name);
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rootlen = strlen(root);
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g_return_val_if_fail(namelen >= rootlen, g_strdup(name));
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if (strncmp(name, root, rootlen) == 0 &&
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strcmp(name+rootlen, "_core") == 0)
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return g_strdup("core");
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if (namelen+1 > rootlen && name[namelen-rootlen-1] == '_' &&
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strcmp(name+namelen-rootlen, root) == 0)
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return g_strndup(name, namelen-rootlen-1);
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return g_strdup(name);
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}
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static GModule *module_open(const char *name)
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{
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struct stat statbuf;
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GModule *module;
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char *path, *str;
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if (g_path_is_absolute(name) ||
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(*name == '.' && name[1] == G_DIR_SEPARATOR))
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path = g_strdup(name);
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else {
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/* first try from home dir */
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str = g_strdup_printf("%s/modules", get_irssi_dir());
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path = g_module_build_path(str, name);
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g_free(str);
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if (stat(path, &statbuf) == 0) {
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module = g_module_open(path, (GModuleFlags) 0);
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g_free(path);
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return module;
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}
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/* module not found from home dir, try global module dir */
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g_free(path);
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path = g_module_build_path(MODULEDIR, name);
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}
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module = g_module_open(path, (GModuleFlags) 0);
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g_free(path);
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return module;
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}
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#define module_error(error, text, rootmodule, submodule) \
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signal_emit("module error", 4, GINT_TO_POINTER(error), text, \
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rootmodule, submodule)
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static int module_load_name(const char *path, const char *rootmodule,
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const char *submodule, int silent)
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{
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void (*module_init) (void);
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GModule *gmodule;
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MODULE_REC *module;
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MODULE_FILE_REC *rec;
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char *initfunc;
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gmodule = module_open(path);
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if (gmodule == NULL) {
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if (!silent) {
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module_error(MODULE_ERROR_LOAD, g_module_error(),
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rootmodule, submodule);
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}
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return FALSE;
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}
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/* get the module's init() function */
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if (strcmp(submodule, "core") == 0)
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initfunc = g_strconcat(rootmodule, "_core_init", NULL);
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else {
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initfunc = g_strconcat(submodule, "_",
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rootmodule, "_init", NULL);
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}
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if (!g_module_symbol(gmodule, initfunc, (gpointer *) &module_init)) {
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if (!silent)
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module_error(MODULE_ERROR_INVALID, NULL,
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rootmodule, submodule);
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g_module_close(gmodule);
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g_free(initfunc);
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return FALSE;
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}
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g_free(initfunc);
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/* Call the module's init() function - it should register itself
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with module_register() function, abort if it doesn't. */
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module_init();
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module = module_find(rootmodule);
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rec = module == NULL ? NULL : module_file_find(module, submodule);
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if (rec == NULL) {
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rec = module_register_full(rootmodule, submodule, NULL);
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rec->gmodule = gmodule;
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module_file_unload(rec);
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module_error(MODULE_ERROR_INVALID, NULL,
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rootmodule, submodule);
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return FALSE;
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}
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rec->gmodule = gmodule;
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rec->initialized = TRUE;
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settings_check_module(rec->defined_module_name);
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signal_emit("module loaded", 2, rec->root, rec);
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return TRUE;
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}
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static int module_load_prefixes(const char *path, const char *module,
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int start, int end, char **prefixes)
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{
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GString *realpath;
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int ok;
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/* load module_core */
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realpath = g_string_new(path);
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g_string_insert(realpath, end, "_core");
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ok = module_load_name(realpath->str, module, "core", FALSE);
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if (ok && prefixes != NULL) {
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/* load all the "prefix modules", like the fe-common, irc,
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etc. part of the module */
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while (*prefixes != NULL) {
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g_string_assign(realpath, path);
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g_string_insert_c(realpath, start, '_');
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g_string_insert(realpath, start, *prefixes);
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module_load_name(realpath->str, module,
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*prefixes, TRUE);
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prefixes++;
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}
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}
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g_string_free(realpath, TRUE);
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return ok;
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}
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static int module_load_full(const char *path, const char *rootmodule,
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const char *submodule, int start, int end,
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char **prefixes)
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{
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MODULE_REC *module;
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int ok, try_prefixes;
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if (!g_module_supported())
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return FALSE;
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module = module_find(rootmodule);
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if (module != NULL && (strcmp(submodule, rootmodule) == 0 ||
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module_file_find(module, submodule) != NULL)) {
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/* module is already loaded */
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module_error(MODULE_ERROR_ALREADY_LOADED, NULL,
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rootmodule, submodule);
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return FALSE;
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}
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/* check if the given module exists.. */
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try_prefixes = strcmp(rootmodule, submodule) == 0;
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ok = module_load_name(path, rootmodule, submodule, try_prefixes);
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if (!ok && try_prefixes) {
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/* nope, try loading the module_core,
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fe_module, etc. */
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ok = module_load_prefixes(path, rootmodule,
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start, end, prefixes);
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}
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return ok;
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}
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/* Load module - automatically tries to load also the related non-core
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modules given in `prefixes' (like irc, fe, fe_text, ..) */
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int module_load(const char *path, char **prefixes)
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{
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char *name, *submodule, *rootmodule;
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int start, end, ret;
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g_return_val_if_fail(path != NULL, FALSE);
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name = module_get_name(path, &start, &end);
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rootmodule = module_get_root(name, prefixes);
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submodule = module_get_sub(name, rootmodule);
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g_free(name);
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ret = module_load_full(path, rootmodule, submodule,
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start, end, prefixes);
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g_free(rootmodule);
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g_free(submodule);
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return ret;
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}
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/* Load a sub module. */
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int module_load_sub(const char *path, const char *submodule, char **prefixes)
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{
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GString *full_path;
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char *name, *rootmodule;
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int start, end, ret;
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g_return_val_if_fail(path != NULL, FALSE);
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g_return_val_if_fail(submodule != NULL, FALSE);
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name = module_get_name(path, &start, &end);
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rootmodule = module_get_root(name, prefixes);
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g_free(name);
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full_path = g_string_new(path);
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if (strcmp(submodule, "core") == 0)
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g_string_insert(full_path, end, "_core");
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else {
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g_string_insert_c(full_path, start, '_');
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g_string_insert(full_path, start, submodule);
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}
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ret = module_load_full(full_path->str, rootmodule, submodule,
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start, end, NULL);
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g_string_free(full_path, TRUE);
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g_free(rootmodule);
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return ret;
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}
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static void module_file_deinit_gmodule(MODULE_FILE_REC *file)
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{
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void (*module_deinit) (void);
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char *deinitfunc;
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/* call the module's deinit() function */
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if (strcmp(file->name, "core") == 0) {
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deinitfunc = g_strconcat(file->root->name,
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"_core_deinit", NULL);
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} else {
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deinitfunc = g_strconcat(file->name, "_",
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file->root->name, "_deinit", NULL);
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}
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if (g_module_symbol(file->gmodule, deinitfunc,
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(gpointer *) &module_deinit))
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module_deinit();
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g_free(deinitfunc);
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if (file->defined_module_name != NULL) {
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settings_remove_module(file->defined_module_name);
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commands_remove_module(file->defined_module_name);
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signals_remove_module(file->defined_module_name);
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}
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g_module_close(file->gmodule);
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}
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void module_file_unload(MODULE_FILE_REC *file)
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{
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MODULE_REC *root;
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root = file->root;
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root->files = g_slist_remove(root->files, file);
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if (file->initialized)
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signal_emit("module unloaded", 2, file->root, file);
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if (file->gmodule != NULL)
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module_file_deinit_gmodule(file);
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g_free(file->name);
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g_free(file->defined_module_name);
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g_free(file);
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if (root->files == NULL && g_slist_find(modules, root) != NULL)
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module_unload(root);
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}
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void module_unload(MODULE_REC *module)
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{
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g_return_if_fail(module != NULL);
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modules = g_slist_remove(modules, module);
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signal_emit("module unloaded", 1, module);
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while (module->files != NULL)
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module_file_unload(module->files->data);
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g_free(module);
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}
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#else /* !HAVE_GMODULE - modules are not supported */
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int module_load(const char *path, char **prefixes)
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{
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return FALSE;
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}
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void module_unload(MODULE_REC *module)
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{
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}
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#endif
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