Extracting Information from /proc

• Most of the entries in /proc provide information formatted to be readable by humans.

  $ cat /proc/cpuinfo
  

• The http://siber.cankaya.edu.tr/SystemsProgramming/cfiles/clock-speed.cprogram in Fig. 10.1 shows a simple way to extract a value from the output by reading the file into a buffer and parse it in memory using sscanf. The program includes the function get_cpu_clock_speed that reads from /proc/cpuinfo into memory and extracts the first CPU's clock speed.

  Figure 10.1: Extract CPU Clock Speed from /proc/cpuinfo.