* @brief Handles all client control requests (admin related)
*/
#include "common.h"
+#include "options.h"
#include "control.h"
#include "sensor.h"
#include "actuator.h"
+#include <dirent.h>
+#include <sys/types.h>
+#include <sys/stat.h>
typedef struct ControlData {
ControlModes current_mode;
pthread_mutex_t mutex;
- struct timeval start_time;
+ struct timespec start_time;
+ char user_name[31]; // The user who owns the currently running experiment
+ char experiment_dir[BUFSIZ]; //Directory for experiment
+ char experiment_name[BUFSIZ];
} ControlData;
ControlData g_controls = {CONTROL_STOP, PTHREAD_MUTEX_INITIALIZER, {0}};
+bool DirExists(const char *path)
+{
+ DIR *dir = opendir(path);
+ if (dir) {
+ closedir(dir);
+ return true;
+ }
+ return false;
+}
+
bool PathExists(const char *path)
{
FILE *fp = fopen(path, "r");
return false;
}
+/**
+ * Lists all experiments for the current user.
+ * @param The context to work in
+ */
+void ListExperiments(FCGIContext *context)
+{
+ DIR * dir = opendir(context->user_dir);
+ if (dir == NULL)
+ {
+ FCGI_RejectJSON(context, "Failed to open user directory");
+ return;
+ }
+ struct dirent * ent;
+ FCGI_BeginJSON(context, STATUS_OK);
+ FCGI_JSONKey("experiments");
+ FCGI_PrintRaw("[");
+
+ bool first = true;
+ while ((ent = readdir(dir)) != NULL) {
+ char *ext = strrchr(ent->d_name, '.');
+ if (ext && !strcmp(ext, ".exp")) {
+ if (!first) {
+ FCGI_PrintRaw(", ");
+ }
+
+ *ext = '\0'; // Ummm... probably not a great idea
+ FCGI_PrintRaw("\"%s\"", ent->d_name);
+ first = false;
+ }
+ }
+ FCGI_PrintRaw("]");
+ FCGI_EndJSON();
+
+ closedir(dir);
+ return;
+}
+
/**
* System control handler. This covers high-level control, including
* admin related functions and starting/stopping experiments..
const char *name = "";
bool force = false;
ControlModes desired_mode;
-
-
+
// Login/auth now handled entirely in fastcgi.c and login.c
//TODO: Need to not have the ability for any user to stop someone else' experiment...
// (achieve by storing the username of the person running the current experiment, even when they log out?)
if (!FCGI_ParseRequest(context, params, values, 3))
return;
+
+ if (!strcmp(action, "identify")) {
+ FCGI_BeginJSON(context, STATUS_OK);
+ FCGI_JSONLong("control_state_id", g_controls.current_mode);
+ FCGI_JSONPair("control_user_name", g_controls.user_name);
+ FCGI_JSONPair("control_experiment_name", g_controls.experiment_name);
+ FCGI_EndJSON();
+ return;
+ } else if (!strcmp(action, "list")) {
+ ListExperiments(context);
+ return;
+ }
+ //TODO: Need a "load" action to set data files (but not run) from a past experiment
+
+ //TODO: Need a "delete" action so that people can overwrite experiments (without all this "force" shenanigans)
if (!strcmp(action, "emergency")) {
desired_mode = CONTROL_EMERGENCY;
FCGI_RejectJSON(context, "Unknown action specified.");
return;
}
-
+
+ if ((*g_controls.user_name) != '\0' && strcmp(g_controls.user_name, context->user_name) != 0)
+ {
+ if (context->user_type != USER_ADMIN) {
+ FCGI_RejectJSON(context, "Another user has an experiment in progress.");
+ return;
+ }
+
+ if (!force) {
+ Log(LOGERR, "User %s is currently running an experiment!", g_controls.user_name);
+ FCGI_RejectJSON(context, "Pass \"force\" to take control over another user's experiment");
+ return;
+ }
+ }
+
void *arg = NULL;
+ char experiment_dir[BUFSIZ] = {0};
if (desired_mode == CONTROL_START) {
- if (PathExists(name) && !force) {
+ int ret;
+
+ if (*name == '\0') {
+ FCGI_RejectJSON(context, "An experiment name must be specified.");
+ return;
+ } if (strpbrk(name, INVALID_CHARACTERS)) {
+ FCGI_RejectJSON(context,
+ "An experiment name must not contain: " INVALID_CHARACTERS_JSON);
+ return;
+ }
+
+ if (*(context->user_dir) == '\0') {
+ FCGI_RejectJSON(context, "Not creating experiment in root dir.");
+ return;
+ }
+
+ ret = snprintf(experiment_dir, BUFSIZ, "%s/%s.exp",
+ context->user_dir, name);
+ if (ret >= BUFSIZ) {
+ FCGI_RejectJSON(context, "The experiment name is too long.");
+ return;
+ } else if (DirExists(experiment_dir) && !force) {
FCGI_RejectJSON(context, "An experiment with that name already exists.");
return;
}
- arg = (void*)name;
+ arg = (void*) experiment_dir;
}
const char *ret;
if ((ret = Control_SetMode(desired_mode, arg)) != NULL) {
FCGI_RejectJSON(context, ret);
} else {
- FCGI_BeginJSON(context, STATUS_OK);
- FCGI_JSONPair("description", "ok");
- FCGI_EndJSON();
+ if (desired_mode == CONTROL_STOP) {
+ g_controls.user_name[0] = '\0';
+ g_controls.experiment_dir[0] = '\0';
+ g_controls.experiment_name[0] = '\0';
+ } else if (desired_mode == CONTROL_START) {
+ snprintf(g_controls.user_name, sizeof(g_controls.user_name),
+ "%s", context->user_name);
+ snprintf(g_controls.experiment_dir, sizeof(g_controls.experiment_dir),
+ "%s", experiment_dir);
+ snprintf(g_controls.experiment_name, sizeof(g_controls.experiment_name),
+ "%s", name);
+ }
+
+ FCGI_AcceptJSON(context, "Ok");
}
}
else switch (desired_mode) {
case CONTROL_START:
if (g_controls.current_mode == CONTROL_STOP) {
- const char * name = arg;
- if (!*name)
- ret = "An experiment name must be specified";
- else if (strpbrk(name, INVALID_CHARACTERS))
- ret = "The experiment name must not contain: " INVALID_CHARACTERS_JSON;
- else {
- FILE *fp = fopen((const char*) arg, "a");
- if (fp) {
- fclose(fp);
- gettimeofday(&(g_controls.start_time), NULL);
- } else
- ret = "Cannot open experiment name marker";
+ const char * path = arg;
+ if (mkdir(path, 0777) != 0 && errno != EEXIST) {
+ Log(LOGERR, "Couldn't create experiment directory %s - %s",
+ path, strerror(errno));
+ ret = "Couldn't create experiment directory.";
+ } else {
+ clock_gettime(CLOCK_MONOTONIC, &(g_controls.start_time));
}
} else
ret = "Cannot start when not in a stopped state.";
break;
case CONTROL_EMERGENCY:
if (g_controls.current_mode != CONTROL_START) //pfft
- ret = "Not running so how can there be an emergency.";
+ ret = "Not running so how can there be an emergency?";
break;
default:
break;
* Gets the start time for the current experiment
* @return the start time
*/
-const struct timeval* Control_GetStartTime() {
+const struct timespec * Control_GetStartTime() {
return &g_controls.start_time;
}
git.ucc.asn.au / matches / MCTX3420.git / blobdiff
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