2019-02-04 22:01:42

async.c

@@ -21,34 +21,41 @@ void async_kill(int sig) {
 }
 
 void async_shutdown (int sig) {
-	async_save(sig);
-	close(sockfd);
+	syslog(cfg_log_facility | LOG_INFO, "Shutting down");
+	if(close(sockfd) == -1) {
+		syslog(cfg_log_facility | LOG_ERR, "async: close failed: %m");
+	}
 	if(unlink(cfg_socket) == -1) {
 		syslog(cfg_log_facility | LOG_ERR, "async: unlink failed: %m");
 	}
+	async_save(sig);
 	async_kill(sig);
 	return;
 }
 
 void async_save(int sig) {
+	syslog(cfg_log_facility | LOG_INFO, "Saving everything");
 	task_save(cfg_task_file);
 	trie_save(cfg_trie_file);
 	return;
 }
 
 void async_flush(int sig) {
+	syslog(cfg_log_facility | LOG_INFO, "Flushing everything");
 	task_flush();
 	trie_flush();
 	return;
 }
 
 void async_load (int sig) {
+	syslog(cfg_log_facility | LOG_INFO, "Loading everything");
 	task_load(cfg_task_file);
 	trie_load(cfg_trie_file);
 	return;
 }
 
 void async_restart (int sig) {
+	syslog(cfg_log_facility | LOG_INFO, "Restarting");
 	async_save(sig);
 	async_flush(sig);
 	async_load(sig);

daemon.c

@@ -28,8 +28,9 @@ int sockfd; //async.h has to be able to use it, and I would hate to write a gett
 
 int main (void) {
 	openlog(cfg_log_ident, cfg_log_opt, cfg_log_facility); //I will probably close its fd a moment later, FIXME
+	syslog(cfg_log_facility | LOG_INFO, "Starting");
 	// No arguments, if you want something, go change source, according to documentation.
-	daemonize(0);
+//	daemonize(0);
 
 	// Load saved state -- variable values and tasks
 	async_load(0);
@@ -43,8 +44,12 @@ int main (void) {
 	socklen_t addrsize = sizeof(struct sockaddr_un);
 	addr.sun_family = AF_UNIX;
 	memcpy(&addr.sun_path, cfg_socket, strlen(cfg_socket)+1);
-	bind(sockfd, (struct sockaddr *) &addr, sizeof(struct sockaddr_un));
-	listen(sockfd, cfg_sock_maxclients);
+	if(bind(sockfd, (struct sockaddr *) &addr, sizeof(struct sockaddr_un)) == -1) {
+		syslog(cfg_log_facility | LOG_ERR, "daemon: bind failed: %m");
+	}
+	if(listen(sockfd, cfg_sock_maxclients) == -1) {
+		syslog(cfg_log_facility | LOG_ERR, "daemon: listen failed: %m");
+	}
 
 	// Everything prepared
 	syslog(cfg_log_facility | LOG_INFO, "Started");
@@ -52,8 +57,15 @@ int main (void) {
 	// Main loop: (everything else is handled by process() and signal handlers).
 	while (true) {
 		int fd = accept(sockfd, (struct sockaddr *) &addr, &addrsize);
+		if (fd == -1) {
+			syslog(cfg_log_facility | LOG_ERR, "daemon: accept failed: %m");
+			while(1);
+			break;
+		} else {
+			syslog(cfg_log_facility | LOG_INFO, "daemon: accepted new connection");
 			process(fd);
 		}
+	}
 
 	syslog(cfg_log_facility | LOG_CRIT, "Escaped infinite loop!");
 	return 5;
@@ -73,21 +85,29 @@ bool write_uint64(uint64_t num, int fd) {
 }
 
 char *read_string(int fd) {
-	char buf[1];
+	char *buf;
 	struct grow *tmp = grow_init(true);
 	do {
+		buf = malloc(1);
+		if(buf == NULL) {
+			syslog(cfg_log_facility | LOG_ERR, "cannot malloc memory for a letter: %m");
+			grow_drop(tmp);
+			return NULL;
+		}
 		read(fd, buf, 1);
 		grow_push(buf, tmp);
 	} while (buf[0] != '\0');
 	char *str = malloc(tmp->elems * sizeof(char));
 	if (str == NULL) {
 		syslog(cfg_log_facility | LOG_ERR, "cannot malloc memory for string: %m");
+		grow_drop(tmp);
 		return NULL;
 	}
 	for (uint64_t j = 0; j < tmp -> elems; j++) {
 		str[j] = *(char *)(tmp->arr[j]);
 	}
 	grow_drop(tmp);
+	syslog(cfg_log_facility | LOG_DEBUG, "daemon: read_string: returning '%s'", str);
 	return str;
 }
 
@@ -261,7 +281,8 @@ bool process(int fd) {
 		async_save(0);
 		return true;
 	} else if (strcmp(cmd, "FLSH") == 0) {
-		char *safe = read_string(fd);
+		char *safe = calloc(1+strlen(cfg_safe_string), sizeof(char));
+		read(fd, safe, strlen(cfg_safe_string));
 		if (strcmp(safe, cfg_safe_string) == 0) {
 			response(SUCCESS, fd);
 			async_flush(0);
@@ -271,7 +292,8 @@ bool process(int fd) {
 			return false;
 		}
 	} else if (strcmp(cmd, "LOAD") == 0) {
-		char *safe = read_string(fd);
+		char *safe = calloc(1+strlen(cfg_safe_string), sizeof(char));
+		read(fd, safe, strlen(cfg_safe_string));
 		if (strcmp(safe, cfg_safe_string) == 0) {
 			response(SUCCESS, fd);
 			async_load(0);
@@ -281,7 +303,8 @@ bool process(int fd) {
 			return false;
 		}
 	} else if (strcmp(cmd, "KILL") == 0) {
-		char *safe = read_string(fd);
+		char *safe = calloc(1+strlen(cfg_safe_string), sizeof(char));
+		read(fd, safe, strlen(cfg_safe_string));
 		if (strcmp(safe, cfg_safe_string) == 0) {
 			response(SUCCESS, fd);
 			async_kill(0);

task.c

@@ -268,7 +268,7 @@ struct task *task_read(int fd) {
 
 bool task_load(const char fn[]) {
 	bool retval = true;
-	int fd = open(fn, O_RDONLY);
+	int fd = open(fn, O_RDWR);
 	if (fd == -1) {
 		syslog(cfg_log_facility | LOG_WARNING, "task: could not load tasks from file: %m");
 		return false;
@@ -284,20 +284,25 @@ bool task_load(const char fn[]) {
 
 bool task_save(const char fn[]) {
 	bool retval = true;
-	int fd = open(fn, O_CREAT | O_WRONLY | O_TRUNC);
+	int fd = open(fn, O_CREAT | O_RDWR | O_TRUNC, (mode_t) 0660);
 	if (fd == -1) {
 		syslog(cfg_log_facility | LOG_WARNING, "trie: could not save tasks to file: %m");
 		return false;
 	}
+	if (tasks != NULL) {
 		for (uint64_t i = 0; i < tasks -> elems; i++) {
 			if (tasks -> arr[i] == NULL) continue;
 			struct task t = *(struct task *)(tasks->arr[i]);
 			retval &= task_write(t, fd);
 		}
+	}
 	close(fd);
 	return retval;
 }
 void task_flush(void) {
+	if (tasks == NULL) {
+		return;
+	}
 	for (uint64_t i = 0; i < tasks->elems; i++) {
 		free(((struct task *)(tasks->arr[i]))->formula);
 		for (int j = 0; ((struct task *)(tasks->arr[i]))->argv[j] != NULL; j++) {