Finding open file descriptors for a process linux ( C code )?

Question

I wanted to find all fds opened for a process in linux.

Can I do it with glib library functions ?

Answer 1

Sometimes C++ is an option, Donal's solution using boost::filesystem:

#include 
#include 
#include 
#include 

namespace fs = boost::filesystem;

int main()
{
    std::string path = "/proc/" + std::to_string(::getpid()) + "/fd/";
    unsigned count = std::distance(fs::directory_iterator(path),
                                   fs::directory_iterator());
    std::cout << "Number of opened FDs: " << count << std::endl;
}