Getting System Information using C

chamila1986 · 01-04-2010, 09:34 PM

I need to take system information like CPU speed,cache size,free and available physical and virtual memory etc in effective way. I tried to get it by reading the file /proc/cpuinfo and /proc/meminfo by using fread() and some string.h functions. But are there any functions or libraries or system calls exists in order to take these values directly and efficiently. Any idea please....

MysticalGroovy · 01-05-2010, 03:22 AM

well in C++ I remember using system() to run a command, parse its output into a temp file and then reading the file. so simple

Code:

 system(cat /proc/meminfo >/tmp/tempFile);

chamila1986 · 01-05-2010, 06:16 AM

You are correct sir...but as i feel is not efficient...

system(cat /proc/meminfo >/tmp/tempFile);

This involve reading /proc/meminfo, create /tmp/tempFile and write data from meminfo to tempFile etc...Isn't it too overhead to the system...can i grub current system information memory information,cpu utilisation from 'top' command(or any other command / structure like sysinfo() in kernal.h) and get it for my own program???? if so how...