How do I read the results of a system() call in C++?

Question

I\'m using the following code to try to read the results of a df command in Linux using popen.

#include  // file an         


        

Answer 1

check your bufSize. ftell can return -1 on error, and this can lead to nonallocation by malloc with buffer having a NULL value.

The reason for the ftell to fail is, because of the popen. You cant search pipes.