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 2002-2006 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 | #ifndef _WIN32 |
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31 | #include <sys/un.h> |
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32 | #endif |
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33 | |
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34 | GSList *child_list = NULL; |
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35 | static char *statefile = NULL; |
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36 | |
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37 | static void ipc_master_cmd_client( irc_t *data, char **cmd ) |
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38 | { |
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39 | /* Normally data points at an irc_t block, but for the IPC master |
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40 | this is different. We think this scary cast is better than |
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41 | creating a new command_t structure, just to make the compiler |
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42 | happy. */ |
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43 | struct bitlbee_child *child = (void*) data; |
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44 | |
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45 | if( child && cmd[1] ) |
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46 | { |
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47 | child->host = g_strdup( cmd[1] ); |
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48 | child->nick = g_strdup( cmd[2] ); |
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49 | child->realname = g_strdup( cmd[3] ); |
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50 | } |
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51 | |
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52 | if( g_strcasecmp( cmd[0], "CLIENT" ) == 0 ) |
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53 | ipc_to_children_str( "OPERMSG :Client connecting (PID=%d): %s@%s (%s)\r\n", |
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54 | child ? child->pid : -1, cmd[2], cmd[1], cmd[3] ); |
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55 | } |
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56 | |
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57 | static void ipc_master_cmd_die( irc_t *data, char **cmd ) |
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58 | { |
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59 | if( global.conf->runmode == RUNMODE_FORKDAEMON ) |
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60 | ipc_to_children_str( "DIE\r\n" ); |
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61 | |
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62 | bitlbee_shutdown( NULL ); |
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63 | } |
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64 | |
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65 | void ipc_master_cmd_rehash( irc_t *data, char **cmd ) |
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66 | { |
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67 | runmode_t oldmode; |
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68 | |
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69 | oldmode = global.conf->runmode; |
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70 | |
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71 | g_free( global.conf ); |
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72 | global.conf = conf_load( 0, NULL ); |
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73 | |
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74 | if( global.conf->runmode != oldmode ) |
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75 | { |
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76 | log_message( LOGLVL_WARNING, "Can't change RunMode setting at runtime, restoring original setting" ); |
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77 | global.conf->runmode = oldmode; |
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78 | } |
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79 | |
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80 | if( global.conf->runmode == RUNMODE_FORKDAEMON ) |
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81 | ipc_to_children( cmd ); |
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82 | } |
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83 | |
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84 | void ipc_master_cmd_restart( irc_t *data, char **cmd ) |
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85 | { |
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86 | struct bitlbee_child *child = (void*) data; |
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87 | |
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88 | if( global.conf->runmode != RUNMODE_FORKDAEMON ) |
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89 | { |
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90 | /* Tell child that this is unsupported. */ |
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91 | return; |
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92 | } |
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93 | |
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94 | global.restart = -1; |
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95 | bitlbee_shutdown( NULL ); |
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96 | } |
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97 | |
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98 | static const command_t ipc_master_commands[] = { |
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99 | { "client", 3, ipc_master_cmd_client, 0 }, |
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100 | { "hello", 0, ipc_master_cmd_client, 0 }, |
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101 | { "die", 0, ipc_master_cmd_die, 0 }, |
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102 | { "wallops", 1, NULL, IPC_CMD_TO_CHILDREN }, |
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103 | { "lilo", 1, NULL, IPC_CMD_TO_CHILDREN }, |
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104 | { "opermsg", 1, NULL, IPC_CMD_TO_CHILDREN }, |
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105 | { "rehash", 0, ipc_master_cmd_rehash, 0 }, |
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106 | { "kill", 2, NULL, IPC_CMD_TO_CHILDREN }, |
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107 | { "restart", 0, ipc_master_cmd_restart, 0 }, |
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108 | { NULL } |
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109 | }; |
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110 | |
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111 | |
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112 | static void ipc_child_cmd_die( irc_t *irc, char **cmd ) |
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113 | { |
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114 | irc_abort( irc, 0, "Shutdown requested by operator" ); |
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115 | } |
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116 | |
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117 | static void ipc_child_cmd_wallops( irc_t *irc, char **cmd ) |
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118 | { |
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119 | if( irc->status < USTATUS_LOGGED_IN ) |
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120 | return; |
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121 | |
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122 | if( strchr( irc->umode, 'w' ) ) |
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123 | irc_write( irc, ":%s WALLOPS :%s", irc->myhost, cmd[1] ); |
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124 | } |
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125 | |
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126 | static void ipc_child_cmd_lilo( irc_t *irc, char **cmd ) |
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127 | { |
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128 | if( irc->status < USTATUS_LOGGED_IN ) |
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129 | return; |
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130 | |
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131 | if( strchr( irc->umode, 's' ) ) |
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132 | irc_write( irc, ":%s NOTICE %s :%s", irc->myhost, irc->nick, cmd[1] ); |
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133 | } |
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134 | |
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135 | static void ipc_child_cmd_opermsg( irc_t *irc, char **cmd ) |
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136 | { |
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137 | if( irc->status < USTATUS_LOGGED_IN ) |
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138 | return; |
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139 | |
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140 | if( strchr( irc->umode, 'o' ) ) |
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141 | irc_write( irc, ":%s NOTICE %s :*** OperMsg *** %s", irc->myhost, irc->nick, cmd[1] ); |
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142 | } |
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143 | |
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144 | static void ipc_child_cmd_rehash( irc_t *irc, char **cmd ) |
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145 | { |
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146 | runmode_t oldmode; |
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147 | |
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148 | oldmode = global.conf->runmode; |
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149 | |
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150 | g_free( global.conf ); |
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151 | global.conf = conf_load( 0, NULL ); |
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152 | |
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153 | global.conf->runmode = oldmode; |
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154 | } |
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155 | |
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156 | static void ipc_child_cmd_kill( irc_t *irc, char **cmd ) |
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157 | { |
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158 | if( irc->status < USTATUS_LOGGED_IN ) |
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159 | return; |
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160 | |
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161 | if( nick_cmp( cmd[1], irc->nick ) != 0 ) |
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162 | return; /* It's not for us. */ |
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163 | |
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164 | irc_write( irc, ":%s!%s@%s KILL %s :%s", irc->mynick, irc->mynick, irc->myhost, irc->nick, cmd[2] ); |
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165 | irc_abort( irc, 0, "Killed by operator: %s", cmd[2] ); |
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166 | } |
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167 | |
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168 | static void ipc_child_cmd_hello( irc_t *irc, char **cmd ) |
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169 | { |
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170 | if( irc->status < USTATUS_LOGGED_IN ) |
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171 | ipc_to_master_str( "HELLO\r\n" ); |
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172 | else |
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173 | ipc_to_master_str( "HELLO %s %s :%s\r\n", irc->host, irc->nick, irc->realname ); |
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174 | } |
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175 | |
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176 | static const command_t ipc_child_commands[] = { |
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177 | { "die", 0, ipc_child_cmd_die, 0 }, |
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178 | { "wallops", 1, ipc_child_cmd_wallops, 0 }, |
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179 | { "lilo", 1, ipc_child_cmd_lilo, 0 }, |
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180 | { "opermsg", 1, ipc_child_cmd_opermsg, 0 }, |
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181 | { "rehash", 0, ipc_child_cmd_rehash, 0 }, |
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182 | { "kill", 2, ipc_child_cmd_kill, 0 }, |
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183 | { "hello", 0, ipc_child_cmd_hello, 0 }, |
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184 | { NULL } |
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185 | }; |
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186 | |
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187 | |
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188 | static void ipc_command_exec( void *data, char **cmd, const command_t *commands ) |
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189 | { |
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190 | int i, j; |
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191 | |
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192 | if( !cmd[0] ) |
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193 | return; |
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194 | |
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195 | for( i = 0; commands[i].command; i ++ ) |
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196 | if( g_strcasecmp( commands[i].command, cmd[0] ) == 0 ) |
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197 | { |
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198 | /* There is no typo in this line: */ |
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199 | for( j = 1; cmd[j]; j ++ ); j --; |
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200 | |
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201 | if( j < commands[i].required_parameters ) |
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202 | break; |
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203 | |
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204 | if( commands[i].flags & IPC_CMD_TO_CHILDREN ) |
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205 | ipc_to_children( cmd ); |
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206 | else |
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207 | commands[i].execute( data, cmd ); |
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208 | |
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209 | break; |
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210 | } |
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211 | } |
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212 | |
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213 | static char *ipc_readline( int fd ) |
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214 | { |
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215 | char *buf, *eol; |
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216 | int size; |
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217 | |
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218 | buf = g_new0( char, 513 ); |
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219 | |
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220 | /* Because this is internal communication, it should be pretty safe |
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221 | to just peek at the message, find its length (by searching for the |
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222 | end-of-line) and then just read that message. With internal |
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223 | sockets and limites message length, messages should always be |
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224 | complete. Saves us quite a lot of code and buffering. */ |
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225 | size = recv( fd, buf, 512, MSG_PEEK ); |
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226 | if( size == 0 || ( size < 0 && !sockerr_again() ) ) |
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227 | return NULL; |
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228 | else if( size < 0 ) /* && sockerr_again() */ |
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229 | return( g_strdup( "" ) ); |
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230 | else |
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231 | buf[size] = 0; |
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232 | |
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233 | eol = strstr( buf, "\r\n" ); |
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234 | if( eol == NULL ) |
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235 | return NULL; |
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236 | else |
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237 | size = eol - buf + 2; |
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238 | |
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239 | g_free( buf ); |
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240 | buf = g_new0( char, size + 1 ); |
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241 | |
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242 | if( recv( fd, buf, size, 0 ) != size ) |
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243 | return NULL; |
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244 | else |
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245 | buf[size-2] = 0; |
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246 | |
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247 | return buf; |
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248 | } |
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249 | |
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250 | void ipc_master_read( gpointer data, gint source, GaimInputCondition cond ) |
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251 | { |
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252 | char *buf, **cmd; |
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253 | |
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254 | if( ( buf = ipc_readline( source ) ) ) |
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255 | { |
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256 | cmd = irc_parse_line( buf ); |
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257 | if( cmd ) |
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258 | ipc_command_exec( data, cmd, ipc_master_commands ); |
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259 | } |
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260 | else |
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261 | { |
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262 | GSList *l; |
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263 | struct bitlbee_child *c; |
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264 | |
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265 | for( l = child_list; l; l = l->next ) |
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266 | { |
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267 | c = l->data; |
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268 | if( c->ipc_fd == source ) |
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269 | { |
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270 | ipc_master_free_one( c ); |
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271 | child_list = g_slist_remove( child_list, c ); |
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272 | break; |
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273 | } |
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274 | } |
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275 | } |
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276 | } |
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277 | |
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278 | void ipc_child_read( gpointer data, gint source, GaimInputCondition cond ) |
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279 | { |
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280 | char *buf, **cmd; |
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281 | |
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282 | if( ( buf = ipc_readline( source ) ) ) |
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283 | { |
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284 | cmd = irc_parse_line( buf ); |
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285 | if( cmd ) |
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286 | ipc_command_exec( data, cmd, ipc_child_commands ); |
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287 | } |
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288 | else |
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289 | { |
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290 | gaim_input_remove( global.listen_watch_source_id ); |
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291 | close( global.listen_socket ); |
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292 | |
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293 | global.listen_socket = -1; |
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294 | } |
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295 | } |
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296 | |
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297 | void ipc_to_master( char **cmd ) |
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298 | { |
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299 | if( global.conf->runmode == RUNMODE_FORKDAEMON ) |
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300 | { |
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301 | char *s = irc_build_line( cmd ); |
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302 | ipc_to_master_str( "%s", s ); |
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303 | g_free( s ); |
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304 | } |
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305 | else if( global.conf->runmode == RUNMODE_DAEMON ) |
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306 | { |
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307 | ipc_command_exec( NULL, cmd, ipc_master_commands ); |
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308 | } |
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309 | } |
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310 | |
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311 | void ipc_to_master_str( char *format, ... ) |
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312 | { |
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313 | char *msg_buf; |
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314 | va_list params; |
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315 | |
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316 | va_start( params, format ); |
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317 | msg_buf = g_strdup_vprintf( format, params ); |
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318 | va_end( params ); |
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319 | |
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320 | if( strlen( msg_buf ) > 512 ) |
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321 | { |
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322 | /* Don't send it, it's too long... */ |
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323 | } |
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324 | else if( global.conf->runmode == RUNMODE_FORKDAEMON ) |
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325 | { |
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326 | write( global.listen_socket, msg_buf, strlen( msg_buf ) ); |
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327 | } |
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328 | else if( global.conf->runmode == RUNMODE_DAEMON ) |
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329 | { |
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330 | char **cmd, *s; |
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331 | |
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332 | if( ( s = strchr( msg_buf, '\r' ) ) ) |
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333 | *s = 0; |
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334 | |
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335 | cmd = irc_parse_line( msg_buf ); |
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336 | ipc_command_exec( NULL, cmd, ipc_master_commands ); |
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337 | g_free( cmd ); |
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338 | } |
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339 | |
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340 | g_free( msg_buf ); |
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341 | } |
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342 | |
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343 | void ipc_to_children( char **cmd ) |
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344 | { |
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345 | if( global.conf->runmode == RUNMODE_FORKDAEMON ) |
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346 | { |
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347 | char *msg_buf = irc_build_line( cmd ); |
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348 | ipc_to_children_str( "%s", msg_buf ); |
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349 | g_free( msg_buf ); |
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350 | } |
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351 | else if( global.conf->runmode == RUNMODE_DAEMON ) |
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352 | { |
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353 | GSList *l; |
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354 | |
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355 | for( l = irc_connection_list; l; l = l->next ) |
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356 | ipc_command_exec( l->data, cmd, ipc_child_commands ); |
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357 | } |
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358 | } |
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359 | |
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360 | void ipc_to_children_str( char *format, ... ) |
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361 | { |
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362 | char *msg_buf; |
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363 | va_list params; |
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364 | |
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365 | va_start( params, format ); |
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366 | msg_buf = g_strdup_vprintf( format, params ); |
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367 | va_end( params ); |
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368 | |
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369 | if( strlen( msg_buf ) > 512 ) |
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370 | { |
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371 | /* Don't send it, it's too long... */ |
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372 | } |
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373 | else if( global.conf->runmode == RUNMODE_FORKDAEMON ) |
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374 | { |
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375 | int msg_len = strlen( msg_buf ); |
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376 | GSList *l; |
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377 | |
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378 | for( l = child_list; l; l = l->next ) |
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379 | { |
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380 | struct bitlbee_child *c = l->data; |
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381 | write( c->ipc_fd, msg_buf, msg_len ); |
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382 | } |
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383 | } |
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384 | else if( global.conf->runmode == RUNMODE_DAEMON ) |
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385 | { |
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386 | char **cmd, *s; |
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387 | |
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388 | if( ( s = strchr( msg_buf, '\r' ) ) ) |
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389 | *s = 0; |
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390 | |
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391 | cmd = irc_parse_line( msg_buf ); |
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392 | ipc_to_children( cmd ); |
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393 | g_free( cmd ); |
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394 | } |
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395 | |
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396 | g_free( msg_buf ); |
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397 | } |
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398 | |
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399 | void ipc_master_free_one( struct bitlbee_child *c ) |
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400 | { |
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401 | gaim_input_remove( c->ipc_inpa ); |
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402 | closesocket( c->ipc_fd ); |
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403 | |
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404 | g_free( c->host ); |
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405 | g_free( c->nick ); |
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406 | g_free( c->realname ); |
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407 | g_free( c ); |
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408 | } |
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409 | |
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410 | void ipc_master_free_all() |
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411 | { |
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412 | GSList *l; |
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413 | |
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414 | for( l = child_list; l; l = l->next ) |
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415 | ipc_master_free_one( l->data ); |
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416 | |
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417 | g_slist_free( child_list ); |
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418 | child_list = NULL; |
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419 | } |
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420 | |
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421 | char *ipc_master_save_state() |
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422 | { |
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423 | char *fn = g_strdup( "/tmp/bee-restart.XXXXXX" ); |
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424 | int fd = mkstemp( fn ); |
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425 | GSList *l; |
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426 | FILE *fp; |
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427 | int i; |
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428 | |
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429 | if( fd == -1 ) |
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430 | { |
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431 | log_message( LOGLVL_ERROR, "Could not create temporary file: %s", strerror( errno ) ); |
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432 | g_free( fn ); |
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433 | return NULL; |
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434 | } |
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435 | |
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436 | /* This is more convenient now. */ |
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437 | fp = fdopen( fd, "w" ); |
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438 | |
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439 | for( l = child_list, i = 0; l; l = l->next ) |
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440 | i ++; |
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441 | |
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442 | /* Number of client processes. */ |
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443 | fprintf( fp, "%d\n", i ); |
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444 | |
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445 | for( l = child_list; l; l = l->next ) |
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446 | fprintf( fp, "%d %d\n", ((struct bitlbee_child*)l->data)->pid, |
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447 | ((struct bitlbee_child*)l->data)->ipc_fd ); |
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448 | |
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449 | if( fclose( fp ) == 0 ) |
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450 | { |
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451 | return fn; |
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452 | } |
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453 | else |
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454 | { |
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455 | unlink( fn ); |
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456 | g_free( fn ); |
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457 | return NULL; |
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458 | } |
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459 | } |
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460 | |
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461 | void ipc_master_set_statefile( char *fn ) |
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462 | { |
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463 | statefile = g_strdup( fn ); |
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464 | } |
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465 | |
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466 | |
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467 | static gboolean new_ipc_client (GIOChannel *gio, GIOCondition cond, gpointer data) |
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468 | { |
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469 | struct bitlbee_child *child = g_new0( struct bitlbee_child, 1 ); |
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470 | int serversock; |
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471 | |
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472 | serversock = g_io_channel_unix_get_fd(gio); |
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473 | |
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474 | child->ipc_fd = accept(serversock, NULL, 0); |
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475 | |
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476 | if (child->ipc_fd == -1) { |
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477 | log_message( LOGLVL_WARNING, "Unable to accept connection on UNIX domain socket: %s", strerror(errno) ); |
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478 | return TRUE; |
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479 | } |
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480 | |
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481 | child->ipc_inpa = gaim_input_add( child->ipc_fd, GAIM_INPUT_READ, ipc_master_read, child ); |
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482 | |
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483 | child_list = g_slist_append( child_list, child ); |
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484 | |
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485 | return TRUE; |
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486 | } |
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487 | |
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488 | #ifndef _WIN32 |
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489 | int ipc_master_listen_socket() |
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490 | { |
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491 | struct sockaddr_un un_addr; |
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492 | int serversock; |
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493 | GIOChannel *gio; |
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494 | |
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495 | /* Clean up old socket files that were hanging around.. */ |
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496 | if (unlink(IPCSOCKET) == -1 && errno != ENOENT) { |
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497 | log_message( LOGLVL_ERROR, "Could not remove old IPC socket at %s: %s", IPCSOCKET, strerror(errno) ); |
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498 | return 0; |
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499 | } |
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500 | |
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501 | un_addr.sun_family = AF_UNIX; |
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502 | strcpy(un_addr.sun_path, IPCSOCKET); |
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503 | |
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504 | serversock = socket(AF_UNIX, SOCK_STREAM, PF_UNIX); |
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505 | |
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506 | if (serversock == -1) { |
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507 | log_message( LOGLVL_WARNING, "Unable to create UNIX socket: %s", strerror(errno) ); |
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508 | return 0; |
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509 | } |
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510 | |
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511 | if (bind(serversock, &un_addr, sizeof(un_addr)) == -1) { |
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512 | log_message( LOGLVL_WARNING, "Unable to bind UNIX socket to %s: %s", IPCSOCKET, strerror(errno) ); |
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513 | return 0; |
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514 | } |
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515 | |
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516 | if (listen(serversock, 5) == -1) { |
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517 | log_message( LOGLVL_WARNING, "Unable to listen on UNIX socket: %s", strerror(errno) ); |
---|
518 | return 0; |
---|
519 | } |
---|
520 | |
---|
521 | gio = g_io_channel_unix_new(serversock); |
---|
522 | |
---|
523 | if (gio == NULL) { |
---|
524 | log_message( LOGLVL_WARNING, "Unable to create IO channel for unix socket" ); |
---|
525 | return 0; |
---|
526 | } |
---|
527 | |
---|
528 | g_io_add_watch(gio, G_IO_IN, new_ipc_client, NULL); |
---|
529 | return 1; |
---|
530 | } |
---|
531 | #else |
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532 | /* FIXME: Open named pipe \\.\BITLBEE */ |
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533 | #endif |
---|
534 | |
---|
535 | int ipc_master_load_state() |
---|
536 | { |
---|
537 | struct bitlbee_child *child; |
---|
538 | FILE *fp; |
---|
539 | int i, n; |
---|
540 | |
---|
541 | if( statefile == NULL ) |
---|
542 | return 0; |
---|
543 | fp = fopen( statefile, "r" ); |
---|
544 | unlink( statefile ); /* Why do it later? :-) */ |
---|
545 | if( fp == NULL ) |
---|
546 | return 0; |
---|
547 | |
---|
548 | if( fscanf( fp, "%d", &n ) != 1 ) |
---|
549 | { |
---|
550 | log_message( LOGLVL_WARNING, "Could not import state information for child processes." ); |
---|
551 | fclose( fp ); |
---|
552 | return 0; |
---|
553 | } |
---|
554 | |
---|
555 | log_message( LOGLVL_INFO, "Importing information for %d child processes.", n ); |
---|
556 | for( i = 0; i < n; i ++ ) |
---|
557 | { |
---|
558 | child = g_new0( struct bitlbee_child, 1 ); |
---|
559 | |
---|
560 | if( fscanf( fp, "%d %d", &child->pid, &child->ipc_fd ) != 2 ) |
---|
561 | { |
---|
562 | log_message( LOGLVL_WARNING, "Unexpected end of file: Only processed %d clients.", i ); |
---|
563 | g_free( child ); |
---|
564 | fclose( fp ); |
---|
565 | return 0; |
---|
566 | } |
---|
567 | child->ipc_inpa = gaim_input_add( child->ipc_fd, GAIM_INPUT_READ, ipc_master_read, child ); |
---|
568 | |
---|
569 | child_list = g_slist_append( child_list, child ); |
---|
570 | } |
---|
571 | |
---|
572 | ipc_to_children_str( "HELLO\r\n" ); |
---|
573 | ipc_to_children_str( "OPERMSG :New BitlBee master process started (version " BITLBEE_VERSION ")\r\n" ); |
---|
574 | |
---|
575 | return 1; |
---|
576 | } |
---|