X-Git-Url: https://git.ucc.asn.au/?a=blobdiff_plain;f=server%2Fmain.c;h=2ca053e11116f71673060c03f451685e8fc7c482;hb=6bc90047ed36b392d90a1bf778baf9687b835f2d;hp=5e2c6c8b27a1460f9bbaf2a960bcef6713106e6e;hpb=0b95dfaf594f4e6866ff8e18040c62382cad7d08;p=matches%2FMCTX3420.git diff --git a/server/main.c b/server/main.c index 5e2c6c8..2ca053e 100644 --- a/server/main.c +++ b/server/main.c @@ -1,22 +1,31 @@ /** * @file main.c - * @purpose main and its helper functions, signal handling and cleanup functions + * @brief main and its helper functions, signal handling and cleanup functions */ -#include "common.h" +// --- Custom headers --- // +#include "common.h" +#include "options.h" +#include "sensor.h" +#include "actuator.h" +#include "control.h" +#include "pin_test.h" +#include "bbb_pin_defines.h" // --- Standard headers --- // +#include // for system logging #include // for signal handling -// --- Custom headers --- // -#include "query.h" -#include "log.h" -#include "options.h" -#include "sensor.h" + +#ifdef REALTIME_VERSION +#include +#include +#include +#include +#endif //REALTIME_VERSION // --- Variable definitions --- // Options g_options; // options passed to program through command line arguments -Sensor g_sensors[NUMSENSORS]; // sensors array // --- Function definitions --- // @@ -29,21 +38,119 @@ void ParseArguments(int argc, char ** argv) { g_options.program = argv[0]; // program name g_options.verbosity = LOGDEBUG; // default log level - Log(LOGDEBUG, "Called as %s with %d arguments.", g_options.program, argc); -} + // Set the main directory + //if (getcwd(g_options.root_dir, sizeof(g_options.root_dir)) == NULL) + // Fatal("Couldn't get current working directory - %s", strerror(errno)); -/** - * Handle a signal - * @param signal - The signal number - */ -//TODO: Something that gets massively annoying with threads is that you can't predict which one gets the signal -// There are ways to deal with this, but I can't remember them -void SignalHandler(int signal) -{ - // At the moment just always exit. - // Call `exit` so that Cleanup will be called to... clean up. - Log(LOGWARN, "Got signal %d (%s). Exiting.", signal, strsignal(signal)); - exit(signal); + clock_gettime(CLOCK_MONOTONIC, &(g_options.start_time)); // Start time + + + g_options.auth_method = AUTH_NONE; // Don't use authentication + g_options.auth_uri = ""; // + g_options.auth_options = ""; + g_options.experiment_dir = "."; + + for (int i = 1; i < argc; ++i) + { + if (argv[i][0] != '-') + Fatal("Unexpected argv[%d] - %s", i, argv[i]); + + if (i+1 >= argc || argv[i+1][0] == '-') + Fatal("No argument following switch %s", argv[i]); + + if (strlen(argv[i]) > 2) + Fatal("Human readable switches are not supported."); + + char * end = NULL; + switch (argv[i][1]) + { + // Set program verbosity + case 'v': + g_options.verbosity = strtol(argv[++i], &end, 10); + break; + // Enable/Disable pin test + case 'p': + g_options.enable_pin = !(strtol(argv[++i], &end, 10)); + break; + // Authentication URI and options + case 'A': + g_options.auth_uri = argv[++i]; + break; + case 'e': + // Experiments directory + g_options.experiment_dir = argv[++i]; + break; + default: + Fatal("Unrecognised switch %s", argv[i]); + break; + } + + if (end != NULL && *end != '\0') + Fatal("argv[%d] -%c requires an integer (got \"%s\" instead)", i-1, argv[i-1][0], argv[i]); + } + + + + if (!DirExists(g_options.experiment_dir)) + { + Fatal("Experiment directory '%s' does not exist.", g_options.experiment_dir); + } + + if (g_options.auth_uri[0] != '\0') + { + // Get the options part of the URI if it exists + char * c = (char*)g_options.auth_uri; + while (*(++c) != '\0' && *c != '#'); + + if (*(c++) == '#') + { + *(c-1) = '\0'; + g_options.auth_options = c; + } + + // Use the first part of the URI to identify the protocol: + c = (char*)g_options.auth_uri; + while (*(++c) != '\0' && *c != ':'); + + if (*c == '\0') // No ':' means no protocol; use plaintext file + { + g_options.auth_method = AUTH_SHADOW; + } + else if (*c == ':' && *(c+1) == '/' && *(c+2) == '/') + { + + *c = '\0'; + if (strcmp(g_options.auth_uri, "ldap") == 0 || strcmp(g_options.auth_uri, "ldaps") == 0) + { + *c = ':'; // LDAP URI's require the prodocol as part of the string + g_options.auth_method = AUTH_LDAP; + } + else if (strcmp(g_options.auth_uri, "mysql") == 0) + { + g_options.auth_uri = c+3; // MySQL doesn't (just a hostname) + g_options.auth_method = AUTH_MYSQL; + } + else + { + Fatal("Unsupported authentication method %s", g_options.auth_uri); + } + } + } + else + { + Log(LOGWARN, "No authentication method."); + } + + Log(LOGDEBUG, "Verbosity: %d", g_options.verbosity); + Log(LOGDEBUG, "Pin Module Enabled: %d", g_options.enable_pin); + Log(LOGDEBUG, "Auth method: %d", g_options.auth_method); + Log(LOGDEBUG, "Auth URI: %s", g_options.auth_uri); + Log(LOGDEBUG, "Auth Options: %s", g_options.auth_options); + //Log(LOGDEBUG, "Root directory: %s", g_options.root_dir); + Log(LOGDEBUG, "Experiment directory: %s", g_options.experiment_dir); + + + } /** @@ -52,29 +159,106 @@ void SignalHandler(int signal) void Cleanup() { Log(LOGDEBUG, "Begin cleanup."); + Sensor_Cleanup(); + Actuator_Cleanup(); Log(LOGDEBUG, "Finish cleanup."); +} + +#ifdef REALTIME_VERSION + +#define MAX_SAFE_STACK (8*1024) +#define NSEC_PER_SEC (1000000000) + +void stack_prefault() +{ + unsigned char dummy[MAX_SAFE_STACK]; + memset(dummy, 0, MAX_SAFE_STACK); + return; +} + +bool is_realtime() +{ + struct utsname u; + bool crit1 = 0; + bool crit2 = 0; + FILE * f; + uname(&u); + crit1 = (strcasestr(u.version, "PREEMPT RT") != NULL); + if (crit1 && ((f = fopen("/sys/kernel/realtime", "r")) != NULL)) + { + int flag; + crit2 = ((fscanf(f, "%d", &flag) == 1) && (flag == 1)); + fclose(f); + } + return (crit1 && crit2); } +#endif //REALTIME_VERSION + /** * Main entry point; start worker threads, setup signal handling, wait for threads to exit, exit * @param argc - Num args * @param argv - Args * @returns 0 on success, error code on failure + * NOTE: NEVER USE exit(3)! Instead call Thread_QuitProgram */ int main(int argc, char ** argv) { - ParseArguments(argc, argv); - // start sensor threads - for (int i = 0; i < NUMSENSORS; ++i) + // Open log before calling ParseArguments (since ParseArguments may call the Log functions) + openlog("mctxserv", LOG_PID | LOG_PERROR, LOG_USER); + + ParseArguments(argc, argv); // Setup the g_options structure from program arguments + + Log(LOGINFO, "Server started"); + + + + #ifdef REALTIME_VERSION + + if (is_realtime()) { - Sensor_Init(g_sensors+i, i); - pthread_create(&(g_sensors[i].thread), NULL, Sensor_Main, (void*)(g_sensors+i)); + Log(LOGDEBUG, "Running under realtime kernel"); } + else + { + Fatal("Not running under realtime kernel"); + } + struct sched_param param; + param.sched_priority = 49; + if (sched_setscheduler(0, SCHED_FIFO, ¶m) < 0) + Fatal("sched_setscheduler failed - %s", strerror(errno)); + if (mlockall(MCL_CURRENT | MCL_FUTURE) == -1) + Fatal("mlockall failed - %s", strerror(errno)); + stack_prefault(); + #endif //REALTIME_VERSION + + + + Pin_Init(); + + // Try and start things + + //const char *ret; + //if ((ret = Control_SetMode(CONTROL_START, "test")) != NULL) + // Fatal("Control_SetMode failed with '%s'", ret); + // run request thread in the main thread - Query_Main(NULL); //TODO: Replace with FastCGI code + FCGI_RequestLoop(NULL); + + + Control_SetMode(CONTROL_STOP, NULL); + //if ((ret = Control_SetMode(CONTROL_STOP, "test")) != NULL) + // Fatal("Control_SetMode failed with '%s'", ret); + + //Sensor_StopAll(); + //Actuator_StopAll(); + + Pin_Close(); + + Cleanup(); return 0; }