tools: detect when user runs without superuser rights and inform him instead of segfault

tools/spec-cl.c

@@ -52,8 +52,8 @@ int main(int argc, char **argv)
 	if(!card)
 	{
 		fprintf(stderr, "%s: Can't detect a SPEC card under the given "
-			"adress.\nMake sure a SPEC card is present in your PC "
-			"and the driver is loaded.\n", argv[0]);
+			"adress.\nMake sure a SPEC card is present in your PC, "
+			"the driver is loaded and you run the program as root.\n", argv[0]);
 		exit(1);
 	}
 

tools/spec-fwloader.c

@@ -43,8 +43,8 @@ int main(int argc, char **argv)
 	if(!card)
 	{
 		fprintf(stderr, "Can't detect a SPEC card under the given "
-			"adress. Make sure a SPEC card is present in your PC "
-			"and the driver is loaded.\n");
+			"adress.\nMake sure a SPEC card is present in your PC, "
+			"the driver is loaded and you run the program as root.\n");
 		exit(1);
 	}
 

tools/spec-vuart.c

@@ -122,8 +122,8 @@ int main(int argc, char **argv)
 	if(!card)
 	{
 		fprintf(stderr, "Can't detect a SPEC card under the given "
-			"adress. Make sure a SPEC card is present in your PC "
-			"and the driver is loaded.\n");
+			"adress.\nMake sure a SPEC card is present in your PC, "
+			"the driver is loaded and you run the program as root.\n");
 		exit(1);
 	}
 

tools/speclib.c

@@ -104,6 +104,12 @@ void *spec_open(int bus, int dev)
 	card->bar0 = spec_map_area(bus, dev, BASE_BAR0, 0x100000);
 	card->bar4 = spec_map_area(bus, dev, BASE_BAR4, 0x1000);
 
+	if(!card->bar0 && !card->bar4)
+	{
+		free(card);
+		card = NULL;
+	}
+
 	return card;
 }
 

tools/specmem.c

@@ -78,8 +78,8 @@ int main(int argc, char **argv)
 	if(!card)
 	{
 		fprintf(stderr, "Can't detect a SPEC card under the given "
-			"adress. Make sure a SPEC card is present in your PC "
-			"and the driver is loaded.\n");
+			"adress. Make sure a SPEC card is present in your PC, "
+			"the driver is loaded and you run the program as root.\n");
 		exit(1);
 	}