src/libstack/osrf_system.c

   1 #include "osrf_system.h"
   2 #include <signal.h>
   3 #include "osrf_application.h"
   4 #include "osrf_prefork.h"
   5
   6 static int _osrfSystemInitCache( void );
   7
   8 static transport_client* osrfGlobalTransportClient = NULL;
   9
  10 transport_client* osrfSystemGetTransportClient( void ) {
  11         return osrfGlobalTransportClient;
  12 }
  13
  14 void osrfSystemIgnoreTransportClient() {
  15         osrfGlobalTransportClient = NULL;
  16 }
  17
  18 transport_client* osrf_system_get_transport_client( void ) {
  19         return osrfGlobalTransportClient;
  20 }
  21
  22 int osrf_system_bootstrap_client( char* config_file, char* contextnode ) {
  23         return osrf_system_bootstrap_client_resc(config_file, contextnode, NULL);
  24 }
  25
  26 int osrfSystemBootstrapClientResc( char* config_file, char* contextnode, char* resource ) {
  27         return osrf_system_bootstrap_client_resc( config_file, contextnode, resource );
  28 }
  29
  30
  31 static int _osrfSystemInitCache( void ) {
  32
  33         jsonObject* cacheServers = osrf_settings_host_value_object("/cache/global/servers/server");
  34         char* maxCache = osrf_settings_host_value("/cache/global/max_cache_time");
  35
  36         if( cacheServers && maxCache) {
  37
  38                 if( cacheServers->type == JSON_ARRAY ) {
  39                         int i;
  40                         char* servers[cacheServers->size];
  41                         for( i = 0; i != cacheServers->size; i++ ) {
  42                                 servers[i] = jsonObjectGetString( jsonObjectGetIndex(cacheServers, i) );
  43                                 osrfLogInfo( OSRF_LOG_MARK, "Adding cache server %s", servers[i]);
  44                         }
  45                         osrfCacheInit( servers, cacheServers->size, atoi(maxCache) );
  46
  47                 } else {
  48                         char* servers[] = { jsonObjectGetString(cacheServers) };
  49                         osrfLogInfo( OSRF_LOG_MARK, "Adding cache server %s", servers[0]);
  50                         osrfCacheInit( servers, 1, atoi(maxCache) );
  51                 }
  52
  53         } else {
  54                 osrfLogError( OSRF_LOG_MARK,  "Missing config value for /cache/global/servers/server _or_ "
  55                         "/cache/global/max_cache_time");
  56         }
  57
  58         return 0;
  59 }
  60
  61
  62 int osrfSystemBootstrap( char* hostname, char* configfile, char* contextNode ) {
  63         if( !(hostname && configfile && contextNode) ) return -1;
  64
  65         /* first we grab the settings */
  66         if(!osrfSystemBootstrapClientResc(configfile, contextNode, "settings_grabber" )) {
  67                 osrfLogError( OSRF_LOG_MARK, "Unable to bootstrap");
  68                 return -1;
  69         }
  70
  71         osrf_settings_retrieve(hostname);
  72         osrf_system_disconnect_client();
  73
  74         jsonObject* apps = osrf_settings_host_value_object("/activeapps/appname");
  75         osrfStringArray* arr = osrfNewStringArray(8);
  76
  77         _osrfSystemInitCache();
  78
  79         if(apps) {
  80                 int i = 0;
  81
  82                 if(apps->type == JSON_STRING) {
  83                         osrfStringArrayAdd(arr, jsonObjectGetString(apps));
  84
  85                 } else {
  86                         jsonObject* app;
  87                         while( (app = jsonObjectGetIndex(apps, i++)) )
  88                                 osrfStringArrayAdd(arr, jsonObjectGetString(app));
  89                 }
  90
  91                 char* appname = NULL;
  92                 i = 0;
  93                 while( (appname = osrfStringArrayGetString(arr, i++)) ) {
  94
  95                         char* lang = osrf_settings_host_value("/apps/%s/language", appname);
  96
  97                         if(lang && !strcasecmp(lang,"c"))  {
  98
  99                                 char* libfile = osrf_settings_host_value("/apps/%s/implementation", appname);
 100
 101                                 if(! (appname && libfile) ) {
 102                                         osrfLogWarning( OSRF_LOG_MARK, "Missing appname / libfile in settings config");
 103                                         continue;
 104                                 }
 105
 106                                 osrfLogInfo( OSRF_LOG_MARK, "Launching application %s with implementation %s", appname, libfile);
 107
 108                                 pid_t pid;
 109
 110                                 if( (pid = fork()) ) {
 111                                         // storage pid in local table for re-launching dead children...
 112                                         osrfLogInfo( OSRF_LOG_MARK, "Launched application child %ld", (long) pid);
 113
 114                                 } else {
 115
 116                                         fprintf(stderr, " * Running application %s\n", appname);
 117                                         if( osrfAppRegisterApplication( appname, libfile ) == 0 )
 118                                                 osrf_prefork_run(appname);
 119
 120                                         osrfLogDebug( OSRF_LOG_MARK, "Server exiting for app %s and library %s\n", appname, libfile );
 121                                         exit(0);
 122                                 }
 123                         } // language == c
 124                 }
 125         }
 126
 127         /** daemonize me **/
 128
 129         /* background and let our children do their thing */
 130         daemonize();
 131     while(1) {
 132         errno = 0;
 133         pid_t pid = wait(NULL);
 134         if(-1 == pid) {
 135             if(errno == ECHILD)
 136                 osrfLogError(OSRF_LOG_MARK, "We have no more live services... exiting");
 137             else
 138                 char* err_str = strerror(errno);
 139                 osrfLogError(OSRF_LOG_MARK, "Exiting top-level system loop with error: %s", err_str);
 140                 free(err_str);
 141             break;
 142         } else {
 143             osrfLogError(OSRF_LOG_MARK, "We lost a top-level service process with PID %ld", pid);
 144         }
 145     }
 146
 147
 148         return 0;
 149 }
 150
 151 int osrf_system_bootstrap_client_resc( char* config_file, char* contextnode, char* resource ) {
 152
 153         int failure = 0;
 154
 155         if(osrfSystemGetTransportClient()) {
 156                 osrfLogInfo(OSRF_LOG_MARK, "Client is already bootstrapped");
 157                 return 1; /* we already have a client connection */
 158         }
 159
 160         if( !( config_file && contextnode ) && ! osrfConfigHasDefaultConfig() ) {
 161                 osrfLogError( OSRF_LOG_MARK, "No Config File Specified\n" );
 162                 return -1;
 163         }
 164
 165         if( config_file ) {
 166                 osrfConfig* cfg = osrfConfigInit( config_file, contextnode );
 167                 if(cfg)
 168                         osrfConfigSetDefaultConfig(cfg);
 169                 else
 170                         return 0;   /* Can't load configuration?  Bail out */
 171         }
 172
 173
 174         char* log_file          = osrfConfigGetValue( NULL, "/logfile");
 175         char* log_level         = osrfConfigGetValue( NULL, "/loglevel" );
 176         osrfStringArray* arr    = osrfNewStringArray(8);
 177         osrfConfigGetValueList(NULL, arr, "/domains/domain");
 178
 179         char* username          = osrfConfigGetValue( NULL, "/username" );
 180         char* password          = osrfConfigGetValue( NULL, "/passwd" );
 181         char* port              = osrfConfigGetValue( NULL, "/port" );
 182         char* unixpath          = osrfConfigGetValue( NULL, "/unixpath" );
 183         char* facility          = osrfConfigGetValue( NULL, "/syslog" );
 184         char* actlog            = osrfConfigGetValue( NULL, "/actlog" );
 185
 186         if(!log_file) {
 187                 fprintf(stderr, "No log file specified in configuration file %s\n",
 188                            config_file);
 189                 free(log_level);
 190                 free(username);
 191                 free(password);
 192                 free(port);
 193                 free(unixpath);
 194                 free(facility);
 195                 free(actlog);
 196                 return -1;
 197         }
 198
 199         /* if we're a source-client, tell the logger */
 200         char* isclient = osrfConfigGetValue(NULL, "/client");
 201         if( isclient && !strcasecmp(isclient,"true") )
 202                 osrfLogSetIsClient(1);
 203         free(isclient);
 204
 205         int llevel = 0;
 206         int iport = 0;
 207         if(port) iport = atoi(port);
 208         if(log_level) llevel = atoi(log_level);
 209
 210         if(!strcmp(log_file, "syslog")) {
 211                 osrfLogInit( OSRF_LOG_TYPE_SYSLOG, contextnode, llevel );
 212                 osrfLogSetSyslogFacility(osrfLogFacilityToInt(facility));
 213                 if(actlog) osrfLogSetSyslogActFacility(osrfLogFacilityToInt(actlog));
 214
 215         } else {
 216                 osrfLogInit( OSRF_LOG_TYPE_FILE, contextnode, llevel );
 217                 osrfLogSetFile( log_file );
 218         }
 219
 220
 221         /* Get a domain, if one is specified */
 222         const char* domain = osrfStringArrayGetString( arr, 0 ); /* just the first for now */
 223         if(!domain) {
 224                 fprintf(stderr, "No domain specified in configuration file %s\n", config_file);
 225                 osrfLogError( OSRF_LOG_MARK, "No domain specified in configuration file %s\n", config_file);
 226                 failure = 1;
 227         }
 228
 229         if(!username) {
 230                 fprintf(stderr, "No username specified in configuration file %s\n", config_file);
 231                 osrfLogError( OSRF_LOG_MARK, "No username specified in configuration file %s\n", config_file);
 232                 failure = 1;
 233         }
 234
 235         if(!password) {
 236                 fprintf(stderr, "No password specified in configuration file %s\n", config_file);
 237                 osrfLogError( OSRF_LOG_MARK, "No password specified in configuration file %s\n", config_file);
 238                 failure = 1;
 239         }
 240
 241         if((iport <= 0) && !unixpath) {
 242                 fprintf(stderr, "No unixpath or valid port in configuration file %s\n", config_file);
 243                 osrfLogError( OSRF_LOG_MARK, "No unixpath or valid port in configuration file %s\n",
 244                         config_file);
 245                 failure = 1;
 246         }
 247
 248         if (failure) {
 249                 osrfStringArrayFree(arr);
 250                 free(log_level);
 251                 free(username);
 252                 free(password);
 253                 free(port);
 254                 free(unixpath);
 255                 free(facility);
 256                 free(actlog);
 257                 return 0;
 258         }
 259
 260         osrfLogInfo( OSRF_LOG_MARK, "Bootstrapping system with domain %s, port %d, and unixpath %s",
 261                 domain, iport, unixpath ? unixpath : "(none)" );
 262         transport_client* client = client_init( domain, iport, unixpath, 0 );
 263
 264         const char* host;
 265         host = getenv("HOSTNAME");
 266
 267         char tbuf[32];
 268         tbuf[0] = '\0';
 269         snprintf(tbuf, 32, "%f", get_timestamp_millis());
 270
 271         if(!host) host = "";
 272         if(!resource) resource = "";
 273
 274         int len = strlen(resource) + 256;
 275         char buf[len];
 276         buf[0] = '\0';
 277         snprintf(buf, len - 1, "%s_%s_%s_%ld", resource, host, tbuf, (long) getpid() );
 278
 279         if(client_connect( client, username, password, buf, 10, AUTH_DIGEST )) {
 280                 /* child nodes will leak the parents client... but we can't free
 281                         it without disconnecting the parents client :( */
 282                 osrfGlobalTransportClient = client;
 283         }
 284
 285         osrfStringArrayFree(arr);
 286         free(actlog);
 287         free(facility);
 288         free(log_level);
 289         free(log_file);
 290         free(username);
 291         free(password);
 292         free(port);
 293         free(unixpath);
 294
 295         if(osrfGlobalTransportClient)
 296                 return 1;
 297
 298         return 0;
 299 }
 300
 301 int osrf_system_disconnect_client( void ) {
 302         client_disconnect( osrfGlobalTransportClient );
 303         client_free( osrfGlobalTransportClient );
 304         osrfGlobalTransportClient = NULL;
 305         return 0;
 306 }
 307
 308 int osrf_system_shutdown( void ) {
 309         osrfConfigCleanup();
 310         osrf_system_disconnect_client();
 311         osrf_settings_free_host_config(NULL);
 312         osrfAppSessionCleanup();
 313         osrfLogCleanup();
 314         return 1;
 315 }
 316
 317
 318
 319