user/tpt/util.c

   1 /*
   2  * $Header: /cvs/sw/new-wave/user/tpt/util.c,v 1.1 2002-02-14 23:04:55 pauli Exp $
   3  */
   4
   5 #include <stdio.h>
   6
   7 #include "tpt.h"
   8
   9 int
  10 get_mhz(void)
  11 {
  12         FILE *f = fopen("/proc/cpuinfo", "r");
  13         if (f == 0)
  14         {
  15                 perror("can't open /proc/cpuinfo\n");
  16                 exit(1);
  17         }
  18
  19         for ( ; ; )
  20         {
  21                 int mhz;
  22                 int ret;
  23                 char buf[1000];
  24
  25                 if (fgets(buf, sizeof(buf), f) == NULL)
  26                 {
  27                         fprintf(stderr, "cannot locate cpu MHz in /proc/cpuinfo\n");
  28                         exit(1);
  29                 }
  30
  31                 ret = sscanf(buf, "cpu MHz         : %d", &mhz);
  32
  33                 if (ret == 1)
  34                 {
  35                         fclose(f);
  36                         return mhz;
  37                 }
  38         }
  39 }
  40
  41