#include <dirent.h> #include <errno.h> #include <unistd.h> #include "dirstream.h" long int telldir(DIR * dir) { off_t offset; if (!dir) { __set_errno(EBADF); return -1; } switch (dir->dd_getdents) { case no_getdents: /* We are running the old kernel. This is the starting offset of the next readdir(). */ offset = lseek(dir->dd_fd, 0, SEEK_CUR); break; case unknown: /* readdir () is not called yet. but seekdir () may be called. */ case have_getdents: /* The next entry. */ offset = dir->dd_nextoff; break; default: __set_errno(EBADF); offset = -1; } return offset; }