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- /*
- telldir -- report directory stream position
- last edit: 25-Apr-1987 D A Gwyn
- NOTE: 4.nBSD directory compaction makes seekdir() & telldir()
- practically impossible to do right. Avoid using them!
- */
- #include <errno.h>
- #include <sys/errno.h>
- #include <sys/types.h>
- #include <dirent.h>
- extern off_t _lseek(int d, int offset, int whence);
- #ifndef SEEK_CUR
- #define SEEK_CUR 1
- #endif
- off_t
- telldir(register DIR *dirp) /* return offset of next entry */
- {
- if ( dirp == NULL || dirp->dd_buf == NULL )
- {
- errno = EFAULT;
- return -1; /* invalid pointer */
- }
- if ( dirp->dd_loc < dirp->dd_size ) /* valid index */
- return ((struct dirent *)&dirp->dd_buf[dirp->dd_loc])->d_off;
- else /* beginning of next directory block */
- return _lseek( dirp->dd_fd, (off_t)0, SEEK_CUR );
- }
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