add cpu_freq function

[slstatus.git] / slstatus.c

diff --git a/slstatus.c b/slstatus.c
index caccc6e..993eba4 100644 (file)
--- a/slstatus.c
+++ b/slstatus.c
@@ -37,6 +37,7 @@ static char *smprintf(const char *fmt, ...);
 static char *battery_perc(const char *bat);
 static char *battery_power(const char *bat);
 static char *battery_state(const char *bat);
+static char *cpu_freq(void);
 static char *cpu_perc(void);
 static char *datetime(const char *fmt);
 static char *disk_free(const char *mnt);
@@ -167,6 +168,23 @@ battery_state(const char *bat)
        }
 }
 
+static char *
+cpu_freq(void)
+{
+       int freq;
+       FILE *fp;
+
+       fp = fopen("/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq", "r");
+       if (fp == NULL) {
+               warn("Failed to open file /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq");
+               return smprintf("%s", UNKNOWN_STR);
+       }
+       fscanf(fp, "%i", &freq);
+       fclose(fp);
+
+       return smprintf("%d", (freq + 500) / 1000);
+}
+
 static char *
 cpu_perc(void)
 {