NAME

fd_same - return whether or not two file descriptors reference the same file

SYNOPSIS

#include <limb/djbunix.h>

int fd_same(int fd1, int fd2)

DESCRIPTION

The fd_same() function returns whether or not the file descriptors fd1 and fd2 reference the same file.

This is determined by calling fstat(3) for both and comparing the value of members st_dev and st_ino of their respective struct stat.

RETURN VALUE

On success, the fd_same() function returns 1 when both file descriptors reference the same file, and 0 when they don't. Otherwise, it returns -1 and sets errno to indicate the error.

ERRORS

The fd_same() function may fail and set errno for any of the errors specified for fstat(3).