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	cpu.c - spoon - set dwm status
	git clone git://git.codemadness.org/spoon
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	---
	cpu.c (649B)
	---
	1 #include <err.h>
	2 #include <stdio.h>
	3
	4 #ifdef __OpenBSD__
	5 #include <sys/sysctl.h>
	6
	7 int
	8 cpuread(void arg, char buf, size_t len)
	9 {
	10 int mib[2], cpuspeed;
	11 size_t sz;
	12
	13 mib[0] = CTL_HW;
	14 mib[1] = HW_CPUSPEED;
	15 sz = sizeof(cpuspeed);
	16 if (sysctl(mib, 2, &cpuspeed, &sz, NULL, 0) < 0)
	17 return -1;
	18 snprintf(buf, len, "%4dMHz", cpuspeed);
	19 return 0;
	20 }
	21 #elif __linux__
	22 int
	23 cpuread(void arg, char buf, size_t len)
	24 {
	25 char *path = arg;
	26 FILE *fp;
	27 int freq;
	28
	29 fp = fopen(path, "r");
	30 if (fp == NULL) {
	31 warn("fopen %s", path);
	32 return -1;
	33 }
	34 fscanf(fp, "%d", &freq);
	35 fclose(fp);
	36 freq /= 1000;
	37 snprintf(buf, len, "%4dMHz", freq);
	38 return 0;
	39 }
	40 #endif