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Annotation of coherent/b/lib/libc/ndir/rewinddir.c, revision 1.1.1.1

1.1       root        1: /*
                      2:        rewinddir -- rewind a directory stream
                      3: 
                      4:        last edit:      25-Apr-1987     D A Gwyn
                      5: 
                      6:        This is not simply a call to seekdir(), because seekdir()
                      7:        will use the current buffer whenever possible and we need
                      8:        rewinddir() to forget about buffered data.
                      9: */
                     10: 
                     11: 
                     12: #include       <sys/types.h>
                     13: #include       "dirent.h"
                     14: 
                     15: #ifdef COHERENT
                     16: #include       <errno.h>
                     17: #else
                     18: #include       <sys/errno.h>
                     19: #endif
                     20: 
                     21: extern int     errno;
                     22: 
                     23: long   lseek();
                     24: 
                     25: #ifndef NULL
                     26: #define        NULL    0
                     27: #endif
                     28: 
                     29: #ifndef SEEK_SET
                     30: #define        SEEK_SET        0
                     31: #endif
                     32: 
                     33: void
                     34: rewinddir( dirp )
                     35:        register DIR            *dirp;  /* stream from opendir() */
                     36:        {
                     37:        if ( dirp == NULL || dirp->dd_buf == NULL )
                     38:                {
                     39:                errno = EFAULT;
                     40:                return;                 /* invalid pointer */
                     41:                }
                     42: 
                     43:        dirp->dd_loc = dirp->dd_size = 0;       /* invalidate buffer */
                     44:        (void)lseek( dirp->dd_fd, (off_t)0, SEEK_SET ); /* may set errno */
                     45:        }

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