diff --git a/configfile.c b/configfile.c
index 67f5a5e..28eacf7 100644
--- a/configfile.c
+++ b/configfile.c
@@ -85,13 +85,13 @@ int config_parse(const char *config)
 {
 	FILE *fz = fopen(config, "r");
 	if (fz == NULL) {
-		log_print(LOG_ERROR, "config_parse(): %s", config);
+		log_print(LOG_ERROR, "%s(): failed to open config '%s'", __FUNCTION__, config);
 		return -1;
 	}
 
 	char *line = malloc(BUFSIZE);
 	if (line == NULL) {
-		log_print(LOG_ERROR, "config_parse(): out of memory");
+		log_print(LOG_ERROR, "%s(): out of memory", __FUNCTION__);
 		fclose(fz);
 		return -1;
 	}
@@ -108,7 +108,7 @@ int config_parse(const char *config)
 			char *tok = strtok(line +1, " ]\n");
 
 			if (tok == NULL || (section = config_add_section(tok)) == NULL) {
-				log_print(LOG_WARN, "config_parse(): invalid section in row %d", linenum);
+				log_print(LOG_WARN, "%s(): invalid section in row %d", __FUNCTION__, linenum);
 				free(line);
 				fclose(fz);
 				return -1;
@@ -116,7 +116,7 @@ int config_parse(const char *config)
 			continue;
 
 		} else if (section == NULL) {
-			log_print(LOG_WARN, "config_parse(): missing section in row %d", linenum);
+			log_print(LOG_WARN, "%s(): missing section in row %d", __FUNCTION__, linenum);
 			free(line);
 			fclose(fz);
 			return -1;
@@ -127,7 +127,7 @@ int config_parse(const char *config)
 			char *tok2;
 			while ((tok2 = strtok_r(NULL, " \n", &tmp))) {
 				if (config_add_tupel(section, tok, tok2) != 0)
-					log_print(LOG_WARN, "config_parse(): invalid row %d", linenum);
+					log_print(LOG_WARN, "%s(): invalid row %d", __FUNCTION__, linenum);
 			}
 		}
 	}
diff --git a/event.c b/event.c
index ffc4769..0dbf270 100644
--- a/event.c
+++ b/event.c
@@ -60,13 +60,13 @@ struct event_fd * event_add_fd(
 {
 	/* check valid filediskriptor */
 	if (fd < 0 || fd > FD_SETSIZE) {
-		log_print(LOG_ERROR, "event_add_fd(): invalid fd");
+		log_print(LOG_ERROR, "%s(): invalid fd", __FUNCTION__);
 		return NULL;
 	}
 
 	/* check valid type (read/write) */
 	if (!(type & FD_TYPES)) {
-		log_print(LOG_ERROR, "event_add_fd(): invalid type");
+		log_print(LOG_ERROR, "%s(): invalid type", __FUNCTION__);
 		return NULL;
 	}
 
@@ -74,7 +74,7 @@ struct event_fd * event_add_fd(
 	if (entry == NULL) {
 		entry = malloc(sizeof(struct event_fd));
 		if (entry == NULL) {
-			log_print(LOG_ERROR, "event_add_fd(): out of memory");
+			log_print(LOG_ERROR, "%s(): out of memory", __FUNCTION__);
 			return NULL;
 		}
 
@@ -177,7 +177,7 @@ struct event_timeout * event_add_timeout(
 	struct event_timeout *entry;
 	entry = malloc(sizeof(struct event_timeout));
 	if (entry == NULL) {
-		log_print(LOG_ERROR, "event_add_timeout(): out of memory");
+		log_print(LOG_ERROR, "%s(): out of memory", __FUNCTION__);
 		return NULL;
 	}
 
@@ -283,19 +283,19 @@ int event_loop(int (*pre_select_cb)(int *maxfd, void *readfds, void *writefds, s
 		else
 			retval = select(maxfd, &readfds, &writefds, NULL, &timeout);
 
+		/* exit loop if callback returns true */
+		if (post_select_cb != NULL && post_select_cb(retval, (void *)&readfds, (void *)&writefds, privdata) != 0)
+			break;
+
 		if (retval < 0 && errno == EINTR) {
 			errno = 0;
 			continue;
 
 		} else if (retval < 0) {
-			log_print(LOG_ERROR, "event_loop(): select():");
+			log_print(LOG_ERROR, "%s(): select():", __FUNCTION__);
 			continue;
 		}
 
-		/* exit loop if callback returns true */
-		if (post_select_cb != NULL && post_select_cb(retval, (void *)&readfds, (void *)&writefds, privdata) != 0)
-			break;
-
 		/* timeout */
 		if (retval == 0)
 			continue;
diff --git a/lcd.c b/lcd.c
index cb5085f..588df33 100644
--- a/lcd.c
+++ b/lcd.c
@@ -33,6 +33,7 @@
 #include "logging.h"
 
 #define _LCD_DEBUG	1
+#define _LCD_DUMMY	1
 
 #define LCD_RESET_TIMEOUT_US	250000				/* 250ms */
 #define LCD_RESET_RETRY_TIMEOUT	10				/* 10s */
@@ -59,7 +60,9 @@ enum lcdstate {
 
 struct lcddev {
 	int fd;
+#if (_LCD_DUMMY)
 	struct event_fd *fakedevice_event;
+#endif /* (_LCD_DUMMY) */
 	struct termios oldtio;
 
 	enum lcdstate state;
@@ -102,14 +105,17 @@ void lcd_close(struct lcddev *dev)
 		dev->read_event = NULL;
 	}
 
-	if (dev->fakedevice_event == NULL) {
-		tcsetattr(dev->fd, TCSANOW, &dev->oldtio);
-
-	} else {
+#if (_LCD_DUMMY)
+	if (dev->fakedevice_event != NULL) {
 		int fd = event_get_fd(dev->fakedevice_event);
 		event_remove_fd(dev->fakedevice_event);
 		dev->fakedevice_event = NULL;
 		close(fd);
+
+	} else
+#endif /* (_LCD_DUMMY) */
+	{
+		tcsetattr(dev->fd, TCSANOW, &dev->oldtio);
 	}
 
 	close(dev->fd);
@@ -120,7 +126,7 @@ static int lcd_open(struct lcddev *dev, const char *device)
 {
 	dev->fd = open(device, O_RDWR);
 	if (dev->fd < 0) {
-		log_print(LOG_ERROR, "failed to open '%s'", device);
+		log_print(LOG_ERROR, "%s(): failed to open '%s'", __FUNCTION__, device);
 		return -1;
 	}
 
@@ -138,7 +144,7 @@ static int lcd_open(struct lcddev *dev, const char *device)
 
 	int err = tcsetattr(dev->fd, TCSAFLUSH, &newtio);
 	if (err < 0) {
-		log_print(LOG_ERROR, "failed to set termios");
+		log_print(LOG_ERROR, "%s(): failed to set termios", __FUNCTION__);
 		close(dev->fd);
 		return -1;
 	}
@@ -146,6 +152,7 @@ static int lcd_open(struct lcddev *dev, const char *device)
 	return 0;
 }
 
+#if (_LCD_DUMMY)
 static int lcd_fakedevice_reply(int fd, void *privdata)
 {
 	struct lcddev *dev = (struct lcddev *)privdata;
@@ -169,8 +176,22 @@ static int lcd_fakedevice_open(struct lcddev *dev)
 {
 	int fd[2];
 
-	if (socketpair(AF_LOCAL, SOCK_STREAM | SOCK_NONBLOCK | SOCK_CLOEXEC, 0 , fd) < 0) {
-		log_print(LOG_ERROR, "socketpair() failed");
+	if (socketpair(AF_LOCAL, SOCK_STREAM, 0 , fd) < 0) {
+		log_print(LOG_ERROR, "%s(): socketpair() failed", __FUNCTION__);
+		return -1;
+	}
+
+	if (fcntl(fd[0], F_SETFD, FD_CLOEXEC) < 0) {
+		log_print(LOG_ERROR, "%s(): fcntl(FD_CLOEXEC)", __FUNCTION__);
+		close(fd[0]);
+		close(fd[1]);
+		return -1;
+	}
+
+	if (fcntl(fd[1], F_SETFD, FD_CLOEXEC) < 0) {
+		log_print(LOG_ERROR, "%s(): fcntl(FD_CLOEXEC)", __FUNCTION__);
+		close(fd[0]);
+		close(fd[1]);
 		return -1;
 	}
 
@@ -178,19 +199,22 @@ static int lcd_fakedevice_open(struct lcddev *dev)
 	dev->fakedevice_event = event_add_readfd(NULL, fd[1], lcd_fakedevice_reply, dev);
 	return 0;
 }
+#endif /* (_LCD_DUMMY) */
 
 #if (_LCD_DEBUG > 1)
 static void lcd_dump(const char *prefix, int len, int size, const char *buf)
 {
 	int i;
+	int pos = 0;
+	char buf[256];
 
-	fprintf(stderr, "%s:[%d/%d]: ", prefix, len, size);
-	for (i = 0; i < len; i++)
-		fprintf(stderr, "0x%X ", (unsigned char)buf[i]);
+	for (i = 0; i < len; i++) {
+		pos += snprintf(buf, sizeof(buf) - pos, "0x%X ", (unsigned char)buf[i]);
+	}
 
-	fprintf(stderr, "\n");
+	log_print(LOG_DEBUG, "%s:[%d/%d]: %s", prefix, len, size, buf);
 }
-#endif
+#endif /* (_LCD_DEBUG > 1) */
 
 static int lcd_read(struct lcddev *dev, const char *buf, int len)
 {
@@ -203,8 +227,8 @@ static int lcd_read(struct lcddev *dev, const char *buf, int len)
 		cnt += retval;
 	}
 #if (_LCD_DEBUG > 1)
-	lcd_dump("lcd_read", cnt, len, buf);
-#endif
+	lcd_dump(__FUNCTION__, cnt, len, buf);
+#endif /* (_LCD_DEBUG > 1) */
 	return (cnt != 0) ? cnt : retval;
 }
 
@@ -213,8 +237,8 @@ static int lcd_write(struct lcddev *dev, char *buf, int len)
 	int retval = write(dev->fd, buf, len);
 
 #if (_LCD_DEBUG > 1)
-	lcd_dump("lcd_write", retval, len, buf);
-#endif
+	lcd_dump(__FUNCTION__, retval, len, buf);
+#endif /* (_LCD_DEBUG > 1) */
 	return retval;
 }
 
@@ -243,8 +267,8 @@ static int lcd_reset_timeout_cb(void *privdata)
 void lcd_reset(struct lcddev *dev)
 {
 #if (_LCD_DEBUG > 0)
-	fprintf(stderr, "lcd_reset()\n");
-#endif
+	log_print(LOG_DEBUG, "%s()", __FUNCTION__);
+#endif /* (_LCD_DEBUG > 0) */
 
 	char cmd[] = A125_CMD_RESET;
 	lcd_write(dev, cmd, sizeof(cmd));
@@ -263,8 +287,8 @@ static int lcd_backlight(struct lcddev *dev, int mode)
 		return -1;
 
 #if (_LCD_DEBUG > 0)
-	fprintf(stderr, "lcd_backlight(%d)\n", mode);
-#endif
+	log_print(LOG_DEBUG, "%s(%d)", __FUNCTION__, mode);
+#endif /* (_LCD_DEBUG > 0) */
 
 	if (dev->backlight_state != mode) {
 		char cmd[] = A125_CMD_BACKLIGHT;
@@ -358,8 +382,8 @@ static int lcd_setline(struct lcddev *dev, int line, int len, const char *buf)
 	cmd[20] = '\0';
 
 #if (_LCD_DEBUG > 0)
-	fprintf(stderr, "lcd_setline(%d, '%-16s')\n", line, cmd +4);
-#endif
+	log_print(LOG_DEBUG, "%s(%d, '%-16s')", __FUNCTION__, line, cmd +4);
+#endif /* (_LCD_DEBUG > 0) */
 
 	lcd_write(dev, cmd, 20);
 	return 0;
@@ -436,16 +460,19 @@ struct lcddev * lcd_init(const char *devicename,
 {
 	struct lcddev *dev = malloc(sizeof(struct lcddev));
 	if (dev == NULL) {
-		log_print(LOG_ERROR, "lcd_init(): out of memory");
+		log_print(LOG_ERROR, "%s(): out of memory", __FUNCTION__);
 		return NULL;
 	}
 
 	memset(dev, 0, sizeof(struct lcddev));
 
 	int retval;
+#if (_LCD_DUMMY)
 	if (strncmp(devicename, "dummy", 5) == 0) {
 		retval = lcd_fakedevice_open(dev);
-	} else {
+	} else
+#endif /* (_LCD_DUMMY) */
+	{
 		retval = lcd_open(dev, devicename);
 	}
 
diff --git a/logging.c b/logging.c
index ddc1128..172a535 100644
--- a/logging.c
+++ b/logging.c
@@ -29,7 +29,7 @@
 
 #define BUFSIZE 8192
 
-static FILE *log_fd = NULL;
+static FILE *log_file = NULL;
 static int log_prio = LOG_EVERYTIME;
 static char *buffer = NULL;
 
@@ -44,12 +44,12 @@ int log_print(int prio, const char *fmt, ...)
 	if (buffer == NULL) {
 		buffer = malloc(BUFSIZE);
 		if (buffer == NULL) {
-			fprintf(stderr, "log_print(): out of memory\n");
+			fprintf(stderr, "%s(): out of memory\n", __FUNCTION__);
 			return -1;
 		}
 	}
 
-	if (log_fd != NULL) {
+	if (log_file != NULL) {
 		time_t  tzgr;
 		time(&tzgr);
 
@@ -62,7 +62,7 @@ int log_print(int prio, const char *fmt, ...)
 
 	if (len < 0 || len >= BUFSIZE) {
 		errno = 0;
-		return log_print(LOG_ERROR, "log_print: arguments too long");
+		return log_print(LOG_ERROR, "%s: arguments too long", __FUNCTION__);
 	}
 
 	if (errno) {
@@ -70,8 +70,8 @@ int log_print(int prio, const char *fmt, ...)
 		errno = 0;
 	}
 
-	retval = fprintf((log_fd ? log_fd : stderr), "%s\n", buffer);
-	fflush(log_fd);
+	retval = fprintf((log_file ? log_file : stderr), "%s\n", buffer);
+	fflush(log_file);
 	return retval;
 }
 
@@ -82,25 +82,26 @@ void log_close(void)
 		buffer = NULL;
 	}
 
-	if (log_fd) {
-		fclose(log_fd);
-		log_fd = NULL;
+	if (log_file) {
+		fclose(log_file);
+		log_file = NULL;
 	}
 }
 
 int log_init(const char *logfile)
 {
-	if (log_fd != NULL)
+	if (log_file != NULL)
 		log_close();
 
-	log_fd = fopen(logfile, "a");
-	if (log_fd == NULL) {
-		fprintf(stderr, "log_init(): can not open logfile");
+	log_file = fopen(logfile, "a");
+	if (log_file == NULL) {
+		fprintf(stderr, "%s(): can not open logfile", __FUNCTION__);
 		return -1;
 	}
 
-	if (fcntl(fileno(log_fd), F_SETFD, FD_CLOEXEC) < 0) {
-		fprintf(stderr, "log_init(): fcntl(FD_CLOEXEC)");
+	if (fcntl(fileno(log_file), F_SETFD, FD_CLOEXEC) < 0) {
+		fprintf(stderr, "%s(): fcntl(FD_CLOEXEC)", __FUNCTION__);
+		fclose(log_file);
 		return -1;
 	}
 
diff --git a/signals.c b/signals.c
index 4ae7176..c962b03 100644
--- a/signals.c
+++ b/signals.c
@@ -68,7 +68,7 @@ int signal_remove_callback(int signum, int type)
 	}
 
 	if (sigaction(signum, &sig_action, NULL) < 0) {
-		log_print(LOG_WARN, "signal_remove_callback(): sigaction()");
+		log_print(LOG_WARN, "%s(): sigaction(%d)", __FUNCTION__, signum);
 		return -1;
 	}
 
@@ -81,7 +81,7 @@ int signal_add_callback(int signum, void (*callback)(void *privdata), void *priv
 {
 	struct signal_entry *entry = malloc(sizeof(struct signal_entry));
 	if (entry == NULL) {
-		log_print(LOG_WARN, "signal_add_callback(): out of memory");
+		log_print(LOG_WARN, "%s(): out of memory", __FUNCTION__);
 		return -1;
 	}
 
@@ -96,7 +96,7 @@ int signal_add_callback(int signum, void (*callback)(void *privdata), void *priv
 	};
 
 	if (sigaction(signum, &sig_action, NULL) < 0) {
-		log_print(LOG_WARN, "signal_add_callback(): sigaction()");
+		log_print(LOG_WARN, "%s(): sigaction(%d)", __FUNCTION__, signum);
 		list_del(&entry->list);
 		free(entry);
 		return -1;
@@ -110,7 +110,7 @@ static int sig_event(int fd, void *privdata)
 	unsigned char signum;
 	int len = read(fd, &signum, 1);
 	if (len <= 0) {
-		log_print(LOG_WARN, "sig_event(): read()");
+		log_print(LOG_WARN, "%s(): read()", __FUNCTION__);
 		return -1;
 	}
 
@@ -132,17 +132,17 @@ static int sig_event(int fd, void *privdata)
 int signal_init(void)
 {
 	if (pipe(sig_pipe) < 0) {
-		log_print(LOG_ERROR, "signal_init(): pipe()");
+		log_print(LOG_ERROR, "%s(): pipe()", __FUNCTION__);
 		return -1;
 	}
 
 	if (fcntl(sig_pipe[0], F_SETFD, FD_CLOEXEC) < 0) {
-		log_print(LOG_WARN, "signal_init(): fcntl(FD_CLOEXEC)");
+		log_print(LOG_WARN, "%s(): fcntl(FD_CLOEXEC)", __FUNCTION__);
 		return -1;
 	}
 
 	if (fcntl(sig_pipe[1], F_SETFD, FD_CLOEXEC) < 0) {
-		log_print(LOG_WARN, "signal_init(): fcntl(FD_CLOEXEC)");
+		log_print(LOG_WARN, "%s(): fcntl(FD_CLOEXEC)", __FUNCTION__);
 		return -1;
 	}