diff -r 3d43b280298c util/femon/femon.c
--- a/util/femon/femon.c	Fri Mar 21 20:26:36 2014 +0100
+++ b/util/femon/femon.c	Sat Jan 07 00:55:41 2023 +0100
@@ -42,16 +42,22 @@
 static char *usage_str =
     "\nusage: femon [options]\n"
     "     -H        : human readable output\n"
+    "     -M        : minimalized output\n"
+    "     -d        : show different values only (depends on -M)\n"
     "     -A        : Acoustical mode. A sound indicates the signal quality.\n"
     "     -r        : If 'Acoustical mode' is active it tells the application\n"
     "                 is called remotely via ssh. The sound is heard on the 'real'\n"
     "                 machine but. The user has to be root.\n"
+    "     -t number : use given cycle time (default 1.00)\n"
     "     -a number : use given adapter (default 0)\n"
     "     -f number : use given frontend (default 0)\n"
     "     -c number : samples to take (default 0 = infinite)\n\n";
 
 int sleep_time=1000000;
+float fl_sleep_time=1;
 int acoustical_mode=0;
+int minimalized=0;
+int diffonly=0;
 int remote=0;
 
 static void usage(void)
@@ -65,9 +71,12 @@
 int check_frontend (struct dvbfe_handle *fe, int human_readable, unsigned int count)
 {
 	struct dvbfe_info fe_info;
+	struct dvbfe_info fe_info_tmp;
 	unsigned int samples = 0;
 	FILE *ttyFile=NULL;
 	
+	struct timeval now;
+
 	// We dont write the "beep"-codes to stdout but to /dev/tty1.
 	// This is neccessary for Thin-Client-Systems or Streaming-Boxes
 	// where the computer does not have a monitor and femon is called via ssh.
@@ -90,12 +99,39 @@
 
 	do {
 		if (dvbfe_get_info(fe, FE_STATUS_PARAMS, &fe_info, DVBFE_INFO_QUERYTYPE_IMMEDIATE, 0) != FE_STATUS_PARAMS) {
+		    if (!minimalized)
 			fprintf(stderr, "Problem retrieving frontend information: %m\n");
 		}
 
 
+		if (diffonly && minimalized)
+		{
+			if (fe_info.signal_strength != fe_info_tmp.signal_strength || fe_info.snr != fe_info_tmp.snr || fe_info.ber != fe_info_tmp.ber)
+			{
+				fe_info_tmp = fe_info;
+			}
+			else
+			{
+				usleep(sleep_time);
+				continue;
+			}
+		}
+
+		gettimeofday(&now, NULL);
+		char ltime[80] = "";
+		strftime(ltime, 80, "%a %b %d %Y - %H:%M:%S", localtime(&now.tv_sec));
+		int ms = now.tv_usec / 1000;
+		char ntime[84] = "";
+		sprintf(ntime, "%s.%03d", ltime, ms);
 
 		if (human_readable) {
+		    if (minimalized) {
+                       printf ("%s | sig %3u%% | snr %3u%% | ber %d",
+				ntime,
+				(fe_info.signal_strength * 100) / 0xffff,
+				(fe_info.snr * 100) / 0xffff,
+				fe_info.ber);
+		    } else {
                        printf ("status %c%c%c%c%c | signal %3u%% | snr %3u%% | ber %d | unc %d | ",
 				fe_info.signal ? 'S' : ' ',
 				fe_info.carrier ? 'C' : ' ',
@@ -106,7 +142,15 @@
 				(fe_info.snr * 100) / 0xffff,
 				fe_info.ber,
 				fe_info.ucblocks);
+		    }
 		} else {
+		    if (minimalized) {
+			printf ("%s | sig %04x | snr %04x | ber %08x",
+				ntime,
+				fe_info.signal_strength,
+				fe_info.snr,
+				fe_info.ber);
+		    } else {
 			printf ("status %c%c%c%c%c | signal %04x | snr %04x | ber %08x | unc %08x | ",
 				fe_info.signal ? 'S' : ' ',
 				fe_info.carrier ? 'C' : ' ',
@@ -117,9 +161,11 @@
 				fe_info.snr,
 				fe_info.ber,
 				fe_info.ucblocks);
+		    }
 		}
 
 		if (fe_info.lock)
+		    if (!minimalized)
 			printf("FE_HAS_LOCK");
 
 		// create beep if acoustical_mode enabled
@@ -188,7 +234,7 @@
 	int human_readable = 0;
 	int opt;
 
-       while ((opt = getopt(argc, argv, "rAHa:f:c:")) != -1) {
+       while ((opt = getopt(argc, argv, "rAdMHa:f:c:t:")) != -1) {
 		switch (opt)
 		{
 		default:
@@ -200,12 +246,22 @@
 		case 'c':
 			count = strtoul(optarg, NULL, 0);
 			break;
+		case 't':
+			fl_sleep_time = strtof(optarg, NULL);
+			sleep_time=fl_sleep_time*1000000;
+			break;
 		case 'f':
 			frontend = strtoul(optarg, NULL, 0);
 			break;
 		case 'H':
 			human_readable = 1;
 			break;
+		case 'M':
+			minimalized = 1;
+			break;
+		case 'd':
+			diffonly = 1;
+			break;
 		case 'A':
 			// Acoustical mode: we have to reduce the delay between
 			// checks in order to hear nice sound
@@ -218,6 +274,9 @@
 		}
 	}
 
+	if (diffonly && !minimalized)
+		printf ("femon: ignored option -- 'd'\n");
+
 	do_mon(adapter, frontend, human_readable, count);
 
 	return 0;