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- #include <errno.h>
- #include <stdlib.h>
- #include <string.h>
- #include <unistd.h>
- #include <dirent.h>
- #include "dirstream.h"
- extern int getdents __P ((unsigned int fd, struct dirent *dirp, unsigned int count));
- struct dirent *readdir(DIR * dir)
- {
- int result;
- struct dirent *de;
- if (!dir) {
- __set_errno(EBADF);
- return NULL;
- }
- /* Are we running an old kernel? */
- if (dir->dd_getdents == no_getdents) {
- abort();
- }
- if (dir->dd_size <= dir->dd_nextloc) {
- /* read dir->dd_max bytes of directory entries. */
- result = getdents(dir->dd_fd, dir->dd_buf, dir->dd_max);
- /* We assume we have getdents (). */
- dir->dd_getdents = have_getdents;
- if (result <= 0) {
- result = -result;
- if (result > 0) {
- /* Are we right? */
- if (result == ENOSYS) {
- dir->dd_getdents = no_getdents;
- abort();
- }
- __set_errno(result);
- }
- return NULL;
- }
- dir->dd_size = result;
- dir->dd_nextloc = 0;
- }
- de = (struct dirent *) (((char *) dir->dd_buf) + dir->dd_nextloc);
- /* Am I right? H.J. */
- dir->dd_nextloc += de->d_reclen;
- /* We have to save the next offset here. */
- dir->dd_nextoff = de->d_off;
- return de;
- }
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