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Annotation of 43BSDReno/lib/libU77/ftell_.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1980 Regents of the University of California.
        !             3:  * All rights reserved.  The Berkeley software License Agreement
        !             4:  * specifies the terms and conditions for redistribution.
        !             5:  *
        !             6:  *     @(#)ftell_.c    5.1     6/7/85
        !             7:  */
        !             8: 
        !             9: /*
        !            10:  * return current file position
        !            11:  *
        !            12:  * calling sequence:
        !            13:  *     integer curpos, ftell
        !            14:  *     curpos = ftell(lunit)
        !            15:  * where:
        !            16:  *     lunit is an open logical unit
        !            17:  *     curpos will be the current offset in bytes from the start of the
        !            18:  *             file associated with that logical unit
        !            19:  *             or a (negative) system error code.
        !            20:  */
        !            21: 
        !            22: #include       "../libI77/fiodefs.h"
        !            23: #include       "../libI77/f_errno.h"
        !            24: 
        !            25: extern unit units[];
        !            26: 
        !            27: long ftell_(lu)
        !            28: long *lu;
        !            29: {
        !            30:        if (*lu < 0 || *lu >= MXUNIT)
        !            31:                return(-(long)(errno=F_ERUNIT));
        !            32:        if (!units[*lu].ufd)
        !            33:                return(-(long)(errno=F_ERNOPEN));
        !            34:        return(ftell(units[*lu].ufd));
        !            35: }

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