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