34 lines
791 B
C
34 lines
791 B
C
/*
|
|
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 );
|
|
}
|