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Annotation of 43BSDReno/contrib/isode-beta/dirent/telldir.c, revision 1.1.1.1

1.1       root        1: /*
                      2:        telldir -- report directory stream position
                      3: 
                      4:        last edit:      25-Apr-1987     D A Gwyn
                      5: 
                      6:        NOTE:   4.nBSD directory compaction makes seekdir() & telldir()
                      7:                practically impossible to do right.  Avoid using them!
                      8: */
                      9: 
                     10: #include       <sys/errno.h>
                     11: #include       <sys/types.h>
                     12: #include       "usr.dirent.h"
                     13: 
                     14: #ifndef        GETDENTS
                     15: extern off_t   lseek();
                     16: 
                     17: extern int     errno;
                     18: 
                     19: #ifndef SEEK_CUR
                     20: #define        SEEK_CUR        1
                     21: #endif
                     22: 
                     23: off_t
                     24: telldir( dirp )                                /* return offset of next entry */
                     25:        DIR     *dirp;                  /* stream from opendir() */
                     26:        {
                     27:        if ( dirp == NULL || dirp->dd_buf == NULL )
                     28:                {
                     29:                errno = EFAULT;
                     30:                return -1;              /* invalid pointer */
                     31:                }
                     32: 
                     33:        if ( dirp->dd_loc < dirp->dd_size )     /* valid index */
                     34:                return ((struct dirent *)&dirp->dd_buf[dirp->dd_loc])->d_off;
                     35:        else                            /* beginning of next directory block */
                     36:                return lseek( dirp->dd_fd, (off_t)0, SEEK_CUR );
                     37:        }
                     38: #endif

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