volume_id: use udev-provided log-level

Signed-off-by: Kay Sievers <kay.sievers@suse.de>

extras/volume_id/Makefile

@@ -33,7 +33,7 @@ override CFLAGS+=-D_FILE_OFFSET_BITS=64
 VOLUME_ID_BASE=volume_id
 include $(VOLUME_ID_BASE)/Makefile.inc
 
-OBJS = udev_volume_id.o $(VOLUME_ID_OBJS) $(SYSFS)
+OBJS = udev_volume_id.o $(VOLUME_ID_OBJS) ../../udev.a
 HEADERS = $(VOLUME_ID_HEADERS)
 
 $(OBJS): $(HEADERS)

extras/volume_id/udev_volume_id.c

@@ -40,12 +40,26 @@
 #define BLKGETSIZE64 _IOR(0x12,114,size_t)
 
 #ifdef USE_LOG
-void log_message(int level, const char *format, ...)
+void log_message(int priority, const char *format, ...)
 {
 	va_list args;
+	static int udev_log = -1;
+
+	if (udev_log == -1) {
+		const char *value;
+
+		value = getenv("UDEV_LOG");
+		if (value)
+			udev_log = log_priority(value);
+		else
+			udev_log = LOG_ERR;
+	}
+
+	if (priority > udev_log)
+		return;
 
 	va_start(args, format);
-	vsyslog(level, format, args);
+	vsyslog(priority, format, args);
 	va_end(args);
 }
 #endif

udev.c

@@ -152,7 +152,7 @@ int main(int argc, char *argv[], char *envp[])
 		goto hotplug;
 	}
 
-	/* export logging flag, as called scripts may want to do the same as udev */
+	/* export logging flag, as called programs may want to do the same as udev */
 	if (udev_log_priority) {
 		char priority[32];