C print file path from FILE*

Question

FILE * fd = fopen (\"/tmp/12345\",\"wb\");

If I have the variable fd , how can I print the file path ? (/tmp/12345) in Linux env.

Answer 1

Since MacOS don't have /proc, fcntl is a good alternative for fetching a file descriptor's path!

Here's a working example:

#include 
#include 

char filePath[PATH_MAX];
if (fcntl(fd, F_GETPATH, filePath) != -1)
{
    printf("%s", filePath);
}

But it works only on MacOS, for Linux PSkocik's solution using readlink seems to be the best answer.