Retrieve filename from file descriptor in C

Question

Is it possible to get the filename of a file descriptor (Linux) in C?

Answer 1

You can use fstat() to get the file's inode by struct stat. Then, using readdir() you can compare the inode you found with those that exist (struct dirent) in a directory (assuming that you know the directory, otherwise you'll have to search the whole filesystem) and find the corresponding file name. Nasty?