spoon

commit 07f66ef7d3e6f3456bcdf7078e1d1a012c36922a
parent 311f1ed9305fbaadc78ecd85c50e3b2df87e5567
Author: lostd <lostd@2f30.org>
Date:   Wed,  2 Nov 2016 16:00:54 +0100

Report frequency of CPU0 in Linux

Diffstat:
M
Makefile
 | 
3
++-
M
cpu.c
 | 
19
+++++++++++++++++++

2 files changed, 21 insertions(+), 1 deletion(-)
diff --git a/Makefile b/Makefile
@@ -13,7 +13,8 @@ CPPFLAGS_OpenBSD = -I/usr/X11R6/include -I/usr/local/include
 LDFLAGS_OpenBSD = -L/usr/X11R6/lib -L/usr/local/lib
 CPPFLAGS_Linux = -DPATH_BAT_CAP=\"/sys/class/power_supply/BAT0/capacity\"\
                  -DPATH_AC_ONLINE=\"/sys/class/power_supply/AC/online\"\
-                 -DPATH_TEMP=\"/sys/class/hwmon/hwmon0/temp1_input\"
+                 -DPATH_TEMP=\"/sys/class/hwmon/hwmon0/temp1_input\"\
+                 -DPATH_CPU_FREQ=\"/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq\"
 CPPFLAGS = $(CPPFLAGS_$(UNAME))
 LDFLAGS = $(LDFLAGS_$(UNAME))
 LDLIBS = -lX11
diff --git a/cpu.c b/cpu.c
@@ -1,3 +1,4 @@
+#include <err.h>
 #include <stdio.h>
 
 #ifdef __OpenBSD__
@@ -17,4 +18,22 @@ cpuread(void *arg, char *buf, size_t len)
 	snprintf(buf, len, "%4dMHz", cpuspeed);
 	return 0;
 }
+#elif __linux__
+int
+cpuread(void *arg, char *buf, size_t len)
+{
+	FILE *fp;
+	int freq;
+
+	fp = fopen(PATH_CPU_FREQ, "r");
+	if (fp == NULL) {
+		warn("fopen %s", PATH_CPU_FREQ);
+		return -1;
+	}
+	fscanf(fp, "%d", &freq);
+	fclose(fp);
+	freq /= 1000;
+	snprintf(buf, len, "%4dMHz", freq);
+	return 0;
+}
 #endif