+int set_led(struct led *led, unsigned char value)
+{
+ char buf[8];
+
+ if ( ! led )
+ return -1;
+
+ if ( ! led->controlfd )
+ return -1;
+
+ if ( led->state == value )
+ return 0;
+
+ snprintf(buf, 8, "%d", value);
+
+ rewind(led->controlfd);
+
+ if ( ! fwrite(buf, sizeof(char), strlen(buf), led->controlfd) )
+ return -2;
+
+ fflush(led->controlfd);
+ led->state=value;
+
+ return 0;
+}
+