Mercurial > ~mikael > mcabber > hg

annotate mcabber/mcabber/modules.c @ 1909:9c14153e2580

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Do not display unhandled IQ result messages to the log window We display the message only in the debug log file, because these messages are usually ignored anyway (ideally we would create a handler explicitly when sending the initial IQ request). Thanks to VarLog for the report!
author Mikael Berthe <mikael@lilotux.net>
date Sun, 18 Apr 2010 14:14:05 +0200
parents 78616d66a7f2
children f5402d705f67
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1 /*
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2 * modules.c -- Modules handling
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3 *
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4 * Copyright (C) 2010 Myhailo Danylenko <isbear@ukrpost.net>
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5 *
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6 * This program is free software; you can redistribute it and/or modify
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7 * it under the terms of the GNU General Public License as published by
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8 * the Free Software Foundation; either version 2 of the License, or (at
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9 * your option) any later version.
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10 *
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11 * This program is distributed in the hope that it will be useful, but
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12 * WITHOUT ANY WARRANTY; without even the implied warranty of
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 * General Public License for more details.
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15 *
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16 * You should have received a copy of the GNU General Public License
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17 * along with this program; if not, write to the Free Software
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18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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19 * USA
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20 */
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21
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22 #include <glib.h>
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23 #include <gmodule.h>
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24 #include <string.h>
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25
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26 #include "settings.h"
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27 #include "config.h"
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28 #include "modules.h"
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29 #include "screen.h"
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30 #include "utils.h"
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31
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32 // Registry of loaded modules
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33 GSList *loaded_modules = NULL;
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34
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35 const gchar *mcabber_branch = MCABBER_BRANCH;
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36 const guint mcabber_api_version = MCABBER_API_VERSION;
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37
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38 static gint module_list_comparator(gconstpointer arg1, gconstpointer arg2)
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39 {
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40 const loaded_module_t *module = arg1;
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41 const char *name = arg2;
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42 return g_strcmp0(module->name, name);
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43 }
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44
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45 // module_load(modulename, manual, force)
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46 // Tries to load specified module and any modules, that this module
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47 // depends on. Returns NULL on success or constant error string in a
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48 // case of error. Error message not necessarily indicates error.
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49 const gchar *module_load(const gchar *arg, gboolean manual, gboolean force)
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50 {
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51 GModule *mod;
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52 module_info_t *info;
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53
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54 if (!arg || !*arg)
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55 return "Missing module name";
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56
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57 { // Check if module is already loaded
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58 GSList *lmod = g_slist_find_custom(loaded_modules, arg,
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59 module_list_comparator);
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60
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61 if (lmod) {
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62 loaded_module_t *module = lmod->data;
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63
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64 if (manual) {
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65 if (!module->locked) {
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66 module->locked = TRUE;
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67 module->refcount += 1;
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68 return force ? NULL : "Module is already automatically loaded, "
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69 "marked as manually loaded";
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70 } else
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71 return force ? NULL : "Module is already loaded";
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72 } else {
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73 module->refcount += 1;
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74 return NULL;
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75 }
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76 }
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77 }
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78
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79 { // Load module
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80 gchar *mdir = expand_filename(settings_opt_get("modules_dir"));
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81 gchar *path = g_module_build_path(mdir ? mdir : PKGLIB_DIR, arg);
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82 g_free(mdir);
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83 mod = g_module_open(path, G_MODULE_BIND_LAZY);
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84 g_free(path);
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85 if (!mod)
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86 return g_module_error();
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87 }
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88
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89 { // Obtain module information structures list
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90 gchar *varname = g_strdup_printf("info_%s", arg);
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91 gpointer var = NULL;
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92
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93 // convert to a valid symbol name
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94 g_strcanon(varname, "abcdefghijklmnopqrstuvwxyz0123456789", '_');
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95
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96 if (!g_module_symbol(mod, varname, &var)) {
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97 if (!force) {
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98 g_free(varname);
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99 if(!g_module_close(mod))
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100 scr_LogPrint(LPRINT_LOGNORM, "Error closing module: %s.",
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101 g_module_error());
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102 return "Module provides no information structure";
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103 }
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104
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105 scr_LogPrint(LPRINT_LOGNORM, "Forced to ignore error: "
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106 "Module provides no information structure.");
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107 }
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108
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109 g_free(varname);
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110 info = var;
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111 }
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112
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113 // Find appropriate info struct
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114 if (info) {
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115 while (info) {
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116 if (!info->branch || !*(info->branch)) {
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117 scr_LogPrint(LPRINT_DEBUG, "No branch name, "
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118 "skipping info chunk.");
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119 } else if (strcmp(info->branch, mcabber_branch)) {
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120 scr_LogPrint(LPRINT_DEBUG, "Unhandled branch %s, "
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121 "skipping info chunk.", info->branch);
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122 } else if (info->api > mcabber_api_version ||
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123 info->api < MCABBER_API_MIN) { // XXX force?
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124 if(!g_module_close(mod))
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125 scr_LogPrint(LPRINT_LOGNORM, "Error closing module: %s.",
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126 g_module_error());
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127 return "Incompatible mcabber API version";
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128 } else
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129 break;
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130 info = info->next;
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131 }
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132
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133 if (!info) { // XXX force?
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134 if(!g_module_close(mod))
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135 scr_LogPrint(LPRINT_LOGNORM, "Error closing module: %s.",
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136 g_module_error());
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137 return "No supported mcabber branch description found";
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138 }
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139 }
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140
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141 // Load dependencies
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142 if (info && info->requires) {
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143 const gchar **dep;
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144 GSList *deps = NULL;
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145
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146 for (dep = info->requires; *dep; ++dep) {
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147 const gchar *err = module_load(*dep, FALSE, FALSE);
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148
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149 if (err) {
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150 GSList *mel;
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151 scr_LogPrint(LPRINT_LOGNORM, "Error loading dependency module %s: %s.",
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152 *dep, err);
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153
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154 // Unload already loaded dependencies
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155 for (mel = deps; mel; mel = mel->next) {
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156 gchar *ldmname = mel->data;
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157 err = module_unload(ldmname, FALSE, FALSE);
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158 scr_LogPrint(LPRINT_LOGNORM,
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159 "Error unloading dependency module %s: %s.",
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160 ldmname, err);
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161 g_free(ldmname);
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162 }
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163 g_slist_free(deps);
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164
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165 // Unload module
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166 if (!g_module_close(mod))
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167 scr_LogPrint(LPRINT_LOGNORM, "Error unloading module %s: %s.",
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168 arg, g_module_error());
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169 return "Dependency problems";
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170 }
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171
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172 deps = g_slist_append(deps, (gpointer) *dep);
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173 }
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174
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175 g_slist_free(deps);
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176 }
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177
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178 { // Register module
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179 loaded_module_t *module = g_new(loaded_module_t, 1);
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180
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181 module->refcount = 1;
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182 module->locked = manual;
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183 module->name = g_strdup(arg);
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184 module->module = mod;
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185 module->info = info;
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186
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187 loaded_modules = g_slist_prepend(loaded_modules, module);
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188 }
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189
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190 // Run initialization routine
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191 if (info && info->init)
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192 info->init();
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193
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194 // XXX Run hk_loaded_module hook (and move this line there)
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195 scr_LogPrint(LPRINT_LOGNORM, "Loaded module %s.", arg);
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196
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197 return NULL;
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198 }
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199
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200 // module_unload(modulename, manual, force)
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201 // Unload specified module and any automatically loaded modules
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202 // that are no more required.
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203 const gchar *module_unload(const gchar *arg, gboolean manual, gboolean force)
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204 {
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205 GSList *lmod;
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206 loaded_module_t *module;
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207 module_info_t *info;
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208
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209 if (!arg || !*arg)
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210 return "Missing module name";
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211
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212 lmod = g_slist_find_custom(loaded_modules, arg, module_list_comparator);
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213 if (!lmod)
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214 return "Module not found";
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215
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216 module = lmod->data;
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217
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218 // Check if user can unload this module
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219 if (manual) {
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220 if (!module->locked) {
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221 if (force)
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222 scr_LogPrint(LPRINT_LOGNORM, "Forced to ignore error: "
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223 "Manually unloading automatically loaded module.");
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224 else
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225 return "Module is not loaded manually";
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226 }
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227 module->locked = FALSE;
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228 }
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229
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230 // Check refcount
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231 module->refcount -= 1;
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232 if (module->refcount > 0) {
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233 if (force)
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234 scr_LogPrint(LPRINT_LOGNORM, "Forced to ignore error: "
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235 "Refcount is not zero (%u).", module->refcount);
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236 else
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237 return manual ? "Module is required by some other modules" : NULL;
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238 }
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239
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240 info = module->info;
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241
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242 // Run uninitialization routine
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243 if (info && info->uninit)
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244 info->uninit();
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245
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246 // Unload dependencies
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247 if (info && info->requires) {
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248 const gchar **dep;
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249 for (dep = info->requires; *dep; ++dep) {
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250 const gchar *err = module_unload(*dep, FALSE, FALSE);
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251 if (err) // XXX
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252 scr_LogPrint(LPRINT_LOGNORM,
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253 "Error unloading automatically loaded module %s: %s.",
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254 *dep, err);
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255 }
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256 }
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257
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258 // XXX Prevent uninitialization routine and dep unloading to be performed again
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259 module->info = NULL;
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260
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261 // Unload module
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262 if (!g_module_close(module->module))
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263 return g_module_error(); // XXX destroy structure?
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264
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265 // Destroy structure
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266 loaded_modules = g_slist_delete_link(loaded_modules, lmod);
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267 // Output this here, as arg may point to module->name
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268 scr_LogPrint(LPRINT_LOGNORM, "Unloaded module %s.", module->name);
1735
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269 g_free(module->name);
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270 g_free(module);
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271
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272 return NULL;
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273 }
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274
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275 // module_list_print(void)
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276 // Prints into status buffer and log list of the currently loaded
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277 // modules.
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278 void module_list_print(void)
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279 {
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280 GSList *mel;
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281 gsize maxlen = 0;
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282 gchar *format;
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283 GString *message;
1820
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284 guint module_count = 0;
1735
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285
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286 if (!loaded_modules) {
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287 scr_LogPrint(LPRINT_LOGNORM, "No modules loaded.");
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288 return;
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289 }
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290
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291 // Count maximum module name length
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292 for (mel = loaded_modules; mel; mel = mel -> next) {
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293 loaded_module_t *module = mel->data;
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294 gsize len = strlen(module->name);
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295 if (len > maxlen)
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296 maxlen = len;
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297 module_count++;
1735
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298 }
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299
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300 // Create format string
1774
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301 format = g_strdup_printf("%%-%us %%2u (%%c)", (unsigned)maxlen);
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302
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303 // Fill the message to be printed
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304 message = g_string_new("Loaded modules:\n");
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diff changeset
305 for (mel = loaded_modules; mel; mel = mel -> next) {
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306 loaded_module_t *module = mel->data;
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307
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308 g_string_append_printf(message, format, module->name, module->refcount,
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309 module->locked ? 'M' : 'A');
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310
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311 if (module->info) {
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312 module_info_t *info = module->info;
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313
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314 // Module version
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315 if (info->version) {
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316 g_string_append(message, " version: ");
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317 g_string_append(message, info->version);
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318 }
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319
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320 // Module dependencies
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321 if (info->requires && *(info->requires)) {
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322 const gchar **dep;
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323 g_string_append(message, " depends: ");
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324
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325 for (dep = info->requires; *dep; ++dep) {
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326 g_string_append(message, *dep);
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327 g_string_append(message, ", ");
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328 }
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329
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330 // Chop extra ", "
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331 g_string_truncate(message, message->len - 2);
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332 }
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333 }
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334
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335 g_string_append_c(message, '\n');
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336 }
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337
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338 // Chop extra "\n"
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339 g_string_truncate(message, message->len - 1);
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340
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341 scr_LogPrint(LPRINT_NORMAL, "%s", message->str);
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342
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f44c375dabf1 Slight change for changeset 0628dcecaddf
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343 if (module_count + 1 > scr_getlogwinheight()) {
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344 scr_setmsgflag_if_needed(SPECIAL_BUFFER_STATUS_ID, TRUE);
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345 scr_setattentionflag_if_needed(SPECIAL_BUFFER_STATUS_ID, TRUE,
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346 ROSTER_UI_PRIO_STATUS_WIN_MESSAGE, prio_max);
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347 }
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348
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349 g_string_free(message, TRUE);
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350 g_free(format);
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351 }
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352
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353 // module_info_print(name)
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354 // Prints info about specific module
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355 void module_info_print(const gchar *name)
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356 {
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357 GSList *lmod;
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358 loaded_module_t *module;
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359 module_info_t *info;
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360
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84487d78d0ea Add a warning when using /module info with no module name
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361 if (!name || !name[0]) {
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362 scr_LogPrint(LPRINT_NORMAL, "Please specify a module name.");
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363 return;
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364 }
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365
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366 lmod = g_slist_find_custom(loaded_modules, name, module_list_comparator);
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367 if (!lmod) {
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368 scr_LogPrint(LPRINT_NORMAL, "Module %s not found.", name);
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369 return;
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370 }
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371
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372 module = lmod->data;
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373 info = module->info;
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374
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375 scr_LogPrint(LPRINT_NORMAL, "Module %s", module->name);
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376 scr_LogPrint(LPRINT_NORMAL, " Location: %s", g_module_name(module->module));
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377 scr_LogPrint(LPRINT_NORMAL, " Loaded: %s",
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378 module->locked ? "Manually" : "Automatically");
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379 scr_LogPrint(LPRINT_NORMAL, " Reference count: %u", module->refcount);
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diff changeset
380
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381 if (info) {
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382
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383 if (info->version)
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384 scr_LogPrint(LPRINT_NORMAL, " Version: %s", info->version);
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diff changeset
385 scr_LogPrint(LPRINT_NORMAL, " API: %s:%u", info->branch, info->api);
1749
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diff changeset
386
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387 if (info->requires && *(info->requires)) {
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388 GString *message = g_string_new("Depends on: ");
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389 const gchar **dep;
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390 for (dep = info->requires; *dep; ++dep) {
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391 g_string_append(message, *dep);
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392 g_string_append(message, ", ");
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393 }
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394
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395 // Chop last ", "
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396 g_string_truncate(message, message->len - 2);
1831
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diff changeset
397 scr_LogPrint(LPRINT_NORMAL, " %s", message->str);
1749
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398 g_string_free(message, TRUE);
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399 }
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diff changeset
400
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401 if (info->description)
1831
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diff changeset
402 scr_LogPrint(LPRINT_NORMAL, " Description: %s", info->description);
1749
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diff changeset
403 }
1773
553e7aa88c9f Set the message flag for /module info output
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parents: 1771
diff changeset
404 scr_setmsgflag_if_needed(SPECIAL_BUFFER_STATUS_ID, TRUE);
1815
6abca6000762 Make use of ROSTER_UI_PRIO_STATUS_WIN_MESSAGE
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parents: 1811
diff changeset
405 scr_setattentionflag_if_needed(SPECIAL_BUFFER_STATUS_ID, TRUE,
6abca6000762 Make use of ROSTER_UI_PRIO_STATUS_WIN_MESSAGE
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parents: 1811
diff changeset
406 ROSTER_UI_PRIO_STATUS_WIN_MESSAGE, prio_max);
1749
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diff changeset
407 }
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diff changeset
408
1735
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409 // modules_init()
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parents:
diff changeset
410 // Initializes module system.
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parents:
diff changeset
411 void modules_init(void)
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parents:
diff changeset
412 {
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parents:
diff changeset
413 }
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parents:
diff changeset
414
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parents:
diff changeset
415 // modules_deinit()
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parents:
diff changeset
416 // Unloads all the modules.
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parents:
diff changeset
417 void modules_deinit(void)
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parents:
diff changeset
418 {
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diff changeset
419 GSList *mel;
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parents:
diff changeset
420
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diff changeset
421 // We need only manually loaded modules
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parents:
diff changeset
422 for (mel = loaded_modules; mel; mel = mel->next) {
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parents:
diff changeset
423 loaded_module_t *module = mel->data;
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diff changeset
424 if (module->locked)
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parents:
diff changeset
425 break;
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parents:
diff changeset
426 }
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parents:
diff changeset
427
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parents:
diff changeset
428 while (mel) {
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parents:
diff changeset
429 loaded_module_t *module = mel->data;
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parents:
diff changeset
430 const gchar *err;
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parents:
diff changeset
431
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parents:
diff changeset
432 // Find next manually loaded module to treat
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parents:
diff changeset
433 for (mel = mel->next; mel; mel = mel->next) {
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parents:
diff changeset
434 loaded_module_t *module = mel->data;
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parents:
diff changeset
435 if (module->locked)
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parents:
diff changeset
436 break;
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parents:
diff changeset
437 }
5093b5ca1572 New modules loading scheme
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parents:
diff changeset
438
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parents:
diff changeset
439 // Unload module
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parents:
diff changeset
440 scr_LogPrint(LPRINT_LOGNORM, "Unloading module %s.", module->name);
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parents:
diff changeset
441 err = module_unload(module->name, TRUE, FALSE);
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parents:
diff changeset
442 if (err)
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parents:
diff changeset
443 scr_LogPrint(LPRINT_LOGNORM, "* Module unloading failed: %s.", err);
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parents:
diff changeset
444 }
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parents:
diff changeset
445 }
5093b5ca1572 New modules loading scheme
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parents:
diff changeset
446
1811
e6d355e50d7a Update Vim modelines
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parents: 1774
diff changeset
447 /* vim: set expandtab cindent cinoptions=>2\:2(0 sw=2 ts=2: For Vim users... */