Mark unused parameters, fix compiler warnings

[slstatus.git] / components / temperature.c

diff --git a/components/temperature.c b/components/temperature.c
index 1353993..b29eb86 100644 (file)
--- a/components/temperature.c
+++ b/components/temperature.c
@@ -16,17 +16,19 @@
        #include <errno.h>
        #include <stdio.h>
        #include <string.h>
-       #include <sys/sysctl.h>
-       #include <sys/time.h>
+       #include <sys/time.h> /* before <sys/sensors.h> for struct timeval */
        #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;
                mib[2] = 0; /* cpu0 */
@@ -35,7 +37,7 @@
 
                size = sizeof(temp);
 
-               if (sysctl(mib, 5, &temp, &size, NULL, 0) == -1) {
+               if (sysctl(mib, 5, &temp, &size, NULL, 0) < 0) {
                        fprintf(stderr, "sysctl 'SENSOR_TEMP': %s\n",
                                strerror(errno));
                        return NULL;