M components/battery.c → components/battery.c

@@ -52,10 +52,12 @@ #include <sys/ioctl.h>
 	#include <unistd.h>
 
 	const char *
-	battery_perc(const char *null)
+	battery_perc(const char *bat)
 	{
 		struct apm_power_info apm_info;
 		int fd;
+
+		UNUSED(bat); /* no way to specify battery on OpenBSD */
 
 		fd = open("/dev/apm", O_RDONLY);
 		if (fd < 0) {
@@ -87,6 +89,8 @@ } map[] = {
 			{ APM_AC_ON,      "+" },
 			{ APM_AC_OFF,     "-" },
 		};
+
+		UNUSED(bat); /* no way to specify battery on OpenBSD */
 
 		fd = open("/dev/apm", O_RDONLY);
 		if (fd < 0) {

M components/temperature.c → components/temperature.c

@@ -21,11 +21,13 @@ #include <sys/sensors.h>
 	#include <sys/sysctl.h>
 
 	const char *
-	temp(const char *null)
+	temp(const char *file)
 	{
 		int mib[5];
 		size_t size;
 		struct sensor temp;
+
+		UNUSED(file); /* no temperature file on OpenBSD */
 
 		mib[0] = CTL_HW;
 		mib[1] = HW_SENSORS;

M util.h → util.h

@@ -3,5 +3,7 @@ extern char buf[1024];
 
 #define LEN(x) (sizeof (x) / sizeof *(x))
 
+#define UNUSED(x) (void)x
+
 const char *bprintf(const char *fmt, ...);
 int pscanf(const char *path, const char *fmt, ...);