i3status - More temperature related fixes for OpenBSD, and a general feature

- Temperature sensors can now set a 'max_threshold' value to color the output red if exceeded.
- Allow for arbitrary temperature sensors nodes to be selected with 'path' on OpenBSD.

i3status.c

@@ -243,6 +243,7 @@ int main(int argc, char *argv[]) {
         cfg_opt_t temp_opts[] = {
                 CFG_STR("format", "%degrees C", CFGF_NONE),
                 CFG_STR("path", NULL, CFGF_NONE),
+                CFG_INT("max_threshold", 75, CFGF_NONE),
                 CFG_END()
         };
 
@@ -460,7 +461,7 @@ int main(int argc, char *argv[]) {
 
                         CASE_SEC_TITLE("cpu_temperature") {
                                 SEC_OPEN_MAP("cpu_temperature");
-                                print_cpu_temperature_info(json_gen, buffer, atoi(title), cfg_getstr(sec, "path"), cfg_getstr(sec, "format"));
+                                print_cpu_temperature_info(json_gen, buffer, atoi(title), cfg_getstr(sec, "path"), cfg_getstr(sec, "format"), cfg_getint(sec, "max_threshold"));
                                 SEC_CLOSE_MAP;
                         }
 

include/i3status.h

@@ -27,16 +27,8 @@ enum { O_DZEN2, O_XMOBAR, O_I3BAR, O_NONE } output_format;
 #define BATT_STATE "hw.acpi.battery.state"
 
 #elif defined(__OpenBSD__)
-/*
- * Due to the fact there are various ways to obtain a temperature reading, THERMAL_ZONE will need
- * to be adjustable enough for those situations. As it can either be hw.sensors.cpu%d.temp0, or
- * hw.sensors.acpitz%d.temp0 or even something different entirely within hw.sensors.%s.temp0.
- * XXX:
- * Due to the fact the i3status API only allows to set the THERMAL_ZONE parameter to an integer,
- * we can't make this fully configureable (yet?).
- */
+/* Default to acpitz(4) if no path is set. */
 #define THERMAL_ZONE "acpitz%d"
-
 #endif
 
 #if defined(__FreeBSD_kernel__) && defined(__GLIBC__)
@@ -145,7 +137,7 @@ void print_ddate(yajl_gen json_gen, char *buffer, const char *format, struct tm
 const char *get_ip_addr();
 void print_wireless_info(yajl_gen json_gen, char *buffer, const char *interface, const char *format_up, const char *format_down);
 void print_run_watch(yajl_gen json_gen, char *buffer, const char *title, const char *pidfile, const char *format);
-void print_cpu_temperature_info(yajl_gen json_gen, char *buffer, int zone, const char *path, const char *format);
+void print_cpu_temperature_info(yajl_gen json_gen, char *buffer, int zone, const char *path, const char *format, int);
 void print_cpu_usage(yajl_gen json_gen, char *buffer, const char *format);
 void print_eth_info(yajl_gen json_gen, char *buffer, const char *interface, const char *format_up, const char *format_down);
 void print_load(yajl_gen json_gen, char *buffer, const char *format);

man/i3status.man

@@ -224,12 +224,16 @@ colored red. The low_threshold type can be of threshold_type "time" or
 
 === CPU-Temperature
 
-Gets the temperature of the given thermal zone.
+Gets the temperature of the given thermal zone. It is possible to
+define a max_threshold that will color the temperature red in case the
+specified thermal zone is getting too hot. Defaults to 75 degrees C.
 
 *Example order*: +cpu_temperature 0+
 
 *Example format*: +T: %degrees °C+
 
+*Example max_threshold*: +42+
+
 === CPU Usage
 
 Gets the percentual CPU usage from +/proc/stat+ (Linux) or +sysctl(3)+ (FreeBSD/OpenBSD).

src/print_cpu_temperature.c

@@ -23,6 +23,8 @@
 #include <sys/sensors.h>
 #include <errno.h>
 #include <err.h>
+
+#define MUKTOC(v) ((v - 273150000) / 1000000.0)
 #endif
 
 static char *thermal_zone;
@@ -32,11 +34,11 @@ static char *thermal_zone;
  * returns the temperature in degree celcius.
  *
  */
-void print_cpu_temperature_info(yajl_gen json_gen, char *buffer, int zone, const char *path, const char *format) {
+void print_cpu_temperature_info(yajl_gen json_gen, char *buffer, int zone, const char *path, const char *format, int max_threshold) {
 #ifdef THERMAL_ZONE
         const char *walk;
         char *outwalk = buffer;
-        static char buf[16];
+	bool colorful_output;
 
         if (path == NULL)
                 asprintf(&thermal_zone, THERMAL_ZONE, zone);
@@ -54,6 +56,7 @@ void print_cpu_temperature_info(yajl_gen json_gen, char *buffer, int zone, const
 
                 if (BEGINS_WITH(walk+1, "degrees")) {
 #if defined(LINUX)
+		        static char buf[16];
                         long int temp;
                         if (!slurp(path, buf, sizeof(buf)))
                                 goto error;
@@ -87,14 +90,11 @@ void print_cpu_temperature_info(yajl_gen json_gen, char *buffer, int zone, const
 				break;
 			goto error;
 		}
-		/*
-		 * 'path' is actually the node within the full path (currently always acpitz0).
-		 * XXX: Extend the API to allow a string instead of just an int for path, this would
-		 * allow us to build an arbitrary path.
-		 */
+		/* 'path' is the node within the full path (defaults to acpitz0). */
 		if (strncmp(sensordev.xname, path, strlen(path)) == 0) {
 			mib[3] = SENSOR_TEMP;
-			for (numt = 0; numt < sensordev.maxnumt[SENSOR_TEMP]; numt++) {
+			/* Limit to temo0, but should retrieve from a full path... */
+			for (numt = 0; numt < 1 /*sensordev.maxnumt[SENSOR_TEMP]*/; numt++) {
 				mib[4] = numt;
 				if (sysctl(mib, 5, &sensor, &slen, NULL, 0) == -1) {
 					if (errno != ENOENT) {
@@ -102,7 +102,15 @@ void print_cpu_temperature_info(yajl_gen json_gen, char *buffer, int zone, const
 						continue;
 					}
 				}
-				outwalk += sprintf(outwalk, "%.2f", (sensor.value - 273150000) / 1000000.0 );
+				if ((int)MUKTOC(sensor.value) >= max_threshold) {
+					START_COLOR("color_bad");
+					colorful_output = true;
+				}
+
+				outwalk += sprintf(outwalk, "%.2f", MUKTOC(sensor.value));
+
+				if (colorful_output)
+					END_COLOR;
 			}
 		}
 	}