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

There's no standard way to retrieve a pathname from a FILE * object, mainly because you can have streams that aren't associated with a named file (stdin, stdout, stderr, pipes, etc.). Individual platforms may supply utilities to retrieve a path from a stream, but you'd have to check the documentation for that platform.

Otherwise, you're expected to keep track of that information manually.