1 | /********************************************************************\ |
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2 | * BitlBee -- An IRC to other IM-networks gateway * |
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3 | * * |
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4 | * Copyright 2002-2004 Wilmer van der Gaast and others * |
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5 | \********************************************************************/ |
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6 | |
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7 | /* IPC - communication between BitlBee processes */ |
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8 | |
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9 | /* |
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10 | This program is free software; you can redistribute it and/or modify |
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11 | it under the terms of the GNU General Public License as published by |
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12 | the Free Software Foundation; either version 2 of the License, or |
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13 | (at your option) any later version. |
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14 | |
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15 | This program is distributed in the hope that it will be useful, |
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16 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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18 | GNU General Public License for more details. |
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19 | |
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20 | You should have received a copy of the GNU General Public License with |
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21 | the Debian GNU/Linux distribution in /usr/share/common-licenses/GPL; |
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22 | if not, write to the Free Software Foundation, Inc., 59 Temple Place, |
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23 | Suite 330, Boston, MA 02111-1307 USA |
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24 | */ |
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25 | |
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26 | #define BITLBEE_CORE |
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27 | #include "bitlbee.h" |
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28 | #include "ipc.h" |
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29 | #include "commands.h" |
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30 | |
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31 | GSList *child_list = NULL; |
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32 | |
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33 | |
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34 | static int ipc_master_cmd_die( irc_t *data, char **cmd ) |
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35 | { |
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36 | if( global.conf->runmode == RUNMODE_FORKDAEMON ) |
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37 | ipc_to_children_str( "DIE\r\n" ); |
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38 | |
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39 | bitlbee_shutdown( NULL ); |
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40 | |
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41 | return 1; |
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42 | } |
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43 | |
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44 | static int ipc_master_cmd_rehash( irc_t *data, char **cmd ) |
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45 | { |
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46 | runmode_t oldmode; |
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47 | |
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48 | oldmode = global.conf->runmode; |
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49 | |
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50 | g_free( global.conf ); |
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51 | global.conf = conf_load( 0, NULL ); |
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52 | |
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53 | if( global.conf->runmode != oldmode ) |
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54 | { |
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55 | log_message( LOGLVL_WARNING, "Can't change RunMode setting at runtime, restoring original setting" ); |
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56 | global.conf->runmode = oldmode; |
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57 | } |
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58 | |
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59 | if( global.conf->runmode == RUNMODE_FORKDAEMON ) |
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60 | ipc_to_children( cmd ); |
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61 | |
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62 | return 1; |
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63 | } |
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64 | |
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65 | static const command_t ipc_master_commands[] = { |
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66 | { "die", 0, ipc_master_cmd_die, 0 }, |
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67 | { "wallops", 1, NULL, IPC_CMD_TO_CHILDREN }, |
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68 | { "lilo", 1, NULL, IPC_CMD_TO_CHILDREN }, |
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69 | { "rehash", 0, ipc_master_cmd_rehash, 0 }, |
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70 | { NULL } |
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71 | }; |
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72 | |
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73 | |
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74 | static int ipc_child_cmd_die( irc_t *data, char **cmd ) |
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75 | { |
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76 | bitlbee_shutdown( NULL ); |
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77 | |
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78 | return 1; |
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79 | } |
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80 | |
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81 | static int ipc_child_cmd_wallops( irc_t *data, char **cmd ) |
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82 | { |
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83 | irc_t *irc = data; |
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84 | |
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85 | if( irc->status < USTATUS_LOGGED_IN ) |
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86 | return 1; |
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87 | |
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88 | if( strchr( irc->umode, 'w' ) ) |
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89 | irc_write( irc, ":%s WALLOPS :%s", irc->myhost, cmd[1] ); |
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90 | |
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91 | return 1; |
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92 | } |
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93 | |
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94 | static int ipc_child_cmd_lilo( irc_t *data, char **cmd ) |
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95 | { |
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96 | irc_t *irc = data; |
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97 | |
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98 | if( irc->status < USTATUS_LOGGED_IN ) |
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99 | return 1; |
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100 | |
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101 | if( strchr( irc->umode, 's' ) ) |
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102 | irc_write( irc, ":%s NOTICE %s :%s", irc->myhost, irc->nick, cmd[1] ); |
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103 | |
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104 | return 1; |
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105 | } |
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106 | |
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107 | static int ipc_child_cmd_rehash( irc_t *data, char **cmd ) |
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108 | { |
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109 | runmode_t oldmode; |
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110 | |
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111 | oldmode = global.conf->runmode; |
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112 | |
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113 | g_free( global.conf ); |
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114 | global.conf = conf_load( 0, NULL ); |
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115 | |
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116 | global.conf->runmode = oldmode; |
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117 | |
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118 | return 1; |
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119 | } |
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120 | |
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121 | static const command_t ipc_child_commands[] = { |
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122 | { "die", 0, ipc_child_cmd_die, 0 }, |
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123 | { "wallops", 1, ipc_child_cmd_wallops, 0 }, |
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124 | { "lilo", 1, ipc_child_cmd_lilo, 0 }, |
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125 | { "rehash", 0, ipc_child_cmd_rehash, 0 }, |
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126 | { NULL } |
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127 | }; |
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128 | |
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129 | |
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130 | static void ipc_command_exec( void *data, char **cmd, const command_t *commands ) |
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131 | { |
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132 | int i; |
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133 | |
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134 | if( !cmd[0] ) |
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135 | return; |
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136 | |
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137 | for( i = 0; commands[i].command; i ++ ) |
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138 | if( g_strcasecmp( commands[i].command, cmd[0] ) == 0 ) |
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139 | { |
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140 | if( commands[i].flags & IPC_CMD_TO_CHILDREN ) |
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141 | ipc_to_children( cmd ); |
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142 | else |
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143 | commands[i].execute( data, cmd ); |
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144 | |
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145 | return; |
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146 | } |
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147 | } |
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148 | |
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149 | static char *ipc_readline( int fd ) |
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150 | { |
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151 | char *buf, *eol; |
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152 | int size; |
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153 | |
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154 | buf = g_new0( char, 513 ); |
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155 | |
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156 | /* Because this is internal communication, it should be pretty safe |
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157 | to just peek at the message, find its length (by searching for the |
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158 | end-of-line) and then just read that message. With internal |
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159 | sockets and limites message length, messages should always be |
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160 | complete. Saves us quite a lot of code and buffering. */ |
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161 | size = recv( fd, buf, 512, MSG_PEEK ); |
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162 | if( size == 0 || ( size < 0 && !sockerr_again() ) ) |
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163 | return NULL; |
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164 | else |
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165 | buf[size] = 0; |
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166 | |
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167 | eol = strstr( buf, "\r\n" ); |
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168 | if( eol == NULL ) |
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169 | return NULL; |
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170 | else |
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171 | size = eol - buf + 2; |
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172 | |
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173 | g_free( buf ); |
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174 | buf = g_new0( char, size + 1 ); |
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175 | |
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176 | if( recv( fd, buf, size, 0 ) != size ) |
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177 | return NULL; |
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178 | else |
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179 | buf[size-2] = 0; |
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180 | |
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181 | return buf; |
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182 | } |
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183 | |
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184 | void ipc_master_read( gpointer data, gint source, GaimInputCondition cond ) |
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185 | { |
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186 | char *buf, **cmd; |
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187 | |
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188 | if( ( buf = ipc_readline( source ) ) ) |
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189 | { |
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190 | cmd = irc_parse_line( buf ); |
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191 | if( cmd ) |
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192 | ipc_command_exec( data, cmd, ipc_master_commands ); |
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193 | } |
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194 | else |
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195 | { |
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196 | GSList *l; |
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197 | struct bitlbee_child *c; |
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198 | |
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199 | for( l = child_list; l; l = l->next ) |
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200 | { |
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201 | c = l->data; |
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202 | if( c->ipc_fd == source ) |
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203 | { |
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204 | close( c->ipc_fd ); |
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205 | gaim_input_remove( c->ipc_inpa ); |
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206 | g_free( c ); |
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207 | |
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208 | child_list = g_slist_remove( child_list, l ); |
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209 | |
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210 | break; |
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211 | } |
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212 | } |
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213 | } |
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214 | } |
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215 | |
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216 | void ipc_child_read( gpointer data, gint source, GaimInputCondition cond ) |
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217 | { |
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218 | char *buf, **cmd; |
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219 | |
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220 | if( ( buf = ipc_readline( source ) ) ) |
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221 | { |
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222 | cmd = irc_parse_line( buf ); |
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223 | if( cmd ) |
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224 | ipc_command_exec( data, cmd, ipc_child_commands ); |
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225 | } |
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226 | else |
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227 | { |
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228 | gaim_input_remove( global.listen_watch_source_id ); |
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229 | close( global.listen_socket ); |
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230 | |
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231 | global.listen_socket = -1; |
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232 | } |
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233 | } |
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234 | |
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235 | void ipc_to_master( char **cmd ) |
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236 | { |
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237 | if( global.conf->runmode == RUNMODE_FORKDAEMON ) |
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238 | { |
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239 | char *s = irc_build_line( cmd ); |
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240 | ipc_to_master_str( s ); |
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241 | g_free( s ); |
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242 | } |
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243 | else if( global.conf->runmode == RUNMODE_DAEMON ) |
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244 | { |
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245 | ipc_command_exec( NULL, cmd, ipc_master_commands ); |
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246 | } |
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247 | } |
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248 | |
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249 | void ipc_to_master_str( char *msg_buf ) |
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250 | { |
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251 | if( global.conf->runmode == RUNMODE_FORKDAEMON ) |
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252 | { |
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253 | write( global.listen_socket, msg_buf, strlen( msg_buf ) ); |
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254 | } |
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255 | else if( global.conf->runmode == RUNMODE_DAEMON ) |
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256 | { |
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257 | char *s, **cmd; |
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258 | |
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259 | /* irc_parse_line() wants a read-write string, so get it one: */ |
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260 | s = g_strdup( msg_buf ); |
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261 | cmd = irc_parse_line( s ); |
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262 | |
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263 | ipc_command_exec( NULL, cmd, ipc_master_commands ); |
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264 | |
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265 | g_free( cmd ); |
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266 | g_free( s ); |
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267 | } |
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268 | } |
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269 | |
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270 | void ipc_to_children( char **cmd ) |
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271 | { |
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272 | if( global.conf->runmode == RUNMODE_FORKDAEMON ) |
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273 | { |
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274 | char *msg_buf = irc_build_line( cmd ); |
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275 | ipc_to_children_str( msg_buf ); |
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276 | g_free( msg_buf ); |
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277 | } |
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278 | else if( global.conf->runmode == RUNMODE_DAEMON ) |
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279 | { |
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280 | GSList *l; |
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281 | |
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282 | for( l = irc_connection_list; l; l = l->next ) |
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283 | ipc_command_exec( l->data, cmd, ipc_child_commands ); |
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284 | } |
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285 | } |
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286 | |
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287 | void ipc_to_children_str( char *msg_buf ) |
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288 | { |
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289 | if( global.conf->runmode == RUNMODE_FORKDAEMON ) |
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290 | { |
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291 | int msg_len = strlen( msg_buf ); |
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292 | GSList *l; |
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293 | |
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294 | for( l = child_list; l; l = l->next ) |
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295 | { |
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296 | struct bitlbee_child *c = l->data; |
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297 | write( c->ipc_fd, msg_buf, msg_len ); |
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298 | } |
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299 | } |
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300 | else if( global.conf->runmode == RUNMODE_DAEMON ) |
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301 | { |
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302 | char *s, **cmd; |
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303 | |
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304 | /* irc_parse_line() wants a read-write string, so get it one: */ |
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305 | s = g_strdup( msg_buf ); |
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306 | cmd = irc_parse_line( s ); |
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307 | |
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308 | ipc_to_children( cmd ); |
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309 | |
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310 | g_free( cmd ); |
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311 | g_free( s ); |
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312 | } |
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313 | } |
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