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Annotation of 43BSD/usr.lib/libU77/ttynam_.c, revision 1.1.1.1

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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