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Annotation of 43BSD/usr.lib/libU77/ttynam_.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:  *     @(#)ttynam_.c   5.1     6/7/85
        !             7:  */
        !             8: 
        !             9: /*
        !            10:  * Return name of tty port associated with lunit
        !            11:  *
        !            12:  * calling sequence:
        !            13:  *     character*19 string, ttynam
        !            14:  *     string = ttynam (lunit)
        !            15:  * where:
        !            16:  *     the character string will be filled with the name of
        !            17:  *     the port, preceded with '/dev/', and blank padded.
        !            18:  *     (19 is the max length ever required)
        !            19:  */
        !            20: 
        !            21: #include "../libI77/fiodefs.h"
        !            22: 
        !            23: extern unit units[];
        !            24: 
        !            25: ttynam_(name, strlen, lu)
        !            26: char *name; long strlen; long *lu;
        !            27: {
        !            28:        char *t = NULL, *ttyname();
        !            29: 
        !            30:        if (0 <= *lu && *lu < MXUNIT && units[*lu].ufd)
        !            31:                t = ttyname(fileno(units[*lu].ufd));
        !            32:        if (t == NULL)
        !            33:                t = "";
        !            34:        b_char(t, name, strlen);
        !            35: }

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