added uptime function

README.md

@@ -20,6 +20,7 @@ The following information is included:
 - load avg
 - ram numbers (free ram, percentage, total ram and used ram)
 - temperature
+- uptime
 - volume percentage (alsa)
 - wifi percentage and essid
 

config.def.h

@@ -34,6 +34,7 @@ static const char unknowntext[] = "n/a";
 - run_command (run custom shell command) [argument: command]
 - temp (temperature in degrees) [argument: temperature file]
 - uid (uid of current user) [argument: NULL]
+- uptime (uptime) [argument: NULL]
 - username (username of current user) [argument: NULL]
 - vol_perc (alsa volume and mute status in percent) [argument: soundcard]
 - wifi_perc (wifi signal in percent) [argument: wifi card interface name]

slstatus.c

@@ -18,6 +18,7 @@
 #include <sys/stat.h>
 #include <sys/statvfs.h>
 #include <sys/socket.h>
+#include <sys/sysinfo.h>
 #include <sys/types.h>
 #include <time.h>
 #include <unistd.h>
@@ -521,6 +522,23 @@ temp(const char *file)
 	return smprintf("%d°C", temperature / 1000);
 }
 
+/* uptime */
+char *
+uptime(const char *null)
+{
+	struct sysinfo info;
+	int hours = 0;
+	int minutes = 0;
+
+	/* get info */
+	sysinfo(&info);
+	hours = info.uptime / 3600;
+	minutes = (info.uptime - hours * 3600 ) / 60;
+
+	/* return it */
+	return smprintf("%dh %dm", hours, minutes);
+}
+
 /* username */
 char *
 username(const char *null)

slstatus.h

@@ -33,6 +33,7 @@ char *ram_total(const char *);
 char *run_command(const char *);
 char *temp(const char *);
 char *uid(const char*);
+char *uptime(const char*);
 char *username(const char*);
 char *vol_perc(const char *);
 char *wifi_perc(const char *);