read the output in console by a function in c

Marin_ · 03-07-2010, 07:50 PM

Hi all.

How can i obtain the pid of a process, by using a function?

Like i know if i write x = system("pidof teste"), x is not the pid of the program teste but it is equal to 0.

How can i know the output of a command like that, but make it in a a program in C?

Thanks

neonsignal · 03-07-2010, 09:26 PM

If you just want to read the (text) output of a command, you can use popen, ie:

Code:

FILE *f = popen("pidof teste", "r");
char buf[256];
fgets(buf, sizeof(buf), f);

If you wanted to do this purely in C, you would have to do the process list search yourself using the process information, but that is more than just a few lines of code.