37 lines
737 B
C
37 lines
737 B
C
/*
|
|
rewinddir -- rewind a directory stream
|
|
|
|
last edit: 25-Apr-1987 D A Gwyn
|
|
|
|
This is not simply a call to seekdir(), because seekdir()
|
|
will use the current buffer whenever possible and we need
|
|
rewinddir() to forget about buffered data.
|
|
*/
|
|
|
|
#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 NULL
|
|
#define NULL 0
|
|
#endif
|
|
|
|
#ifndef SEEK_SET
|
|
#define SEEK_SET 0
|
|
#endif
|
|
|
|
void
|
|
rewinddir(register DIR *dirp)
|
|
{
|
|
if ( dirp == NULL || dirp->dd_buf == NULL )
|
|
{
|
|
errno = EFAULT;
|
|
return; /* invalid pointer */
|
|
}
|
|
|
|
dirp->dd_loc = dirp->dd_size = 0; /* invalidate buffer */
|
|
(void)_lseek( dirp->dd_fd, (off_t)0, SEEK_SET ); /* may set errno */
|
|
}
|