Linux programming

venkatgopu · #1 (**permalink**) 09-11-2009

Hi friends!

I am new be in Linux system programing. Can you help me to get running processes statistics (pid, uid, %cpu, %mem, pri, ni) without using any commands like TOP, PS.

Can you tell me any system call available to get %cpu only or %mem only?
Even i include the vmstat.c file to achieve memory statistics by calling those function within vmstat.c file.When i compile my application program it shows an error that No such file or Directory

My requirement is that i want to achieve running processes statistics from my application program. When i compile my application program, the program must give the result like TOP command.

jim mcnamara · #2 (**permalink**) 09-11-2009

Start by learning about the /proc filesystem. It has process information.
proc(5): process info pseudo-filesystem - Linux man page See /proc/[number]/stat particularly

This sounds like homework. The forums do not allow homework

venkatgopu · #3 (**permalink**) 09-14-2009

Hi jim mcnamara!

The above link you had given to me, Its very nice link to start my system programming. Thank you very much.

Thanks & Regards
Venkat Gopu

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