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Annotation of 42BSD/usr.lib/libU77/ttynam_.c, revision 1.1

1.1     ! root        1: /*
        !             2: char id_ttynam[] = "@(#)ttynam_.c      1.1";
        !             3:  *
        !             4:  * Return name of tty port associated with lunit
        !             5:  *
        !             6:  * calling sequence:
        !             7:  *     character*19 string, ttynam
        !             8:  *     string = ttynam (lunit)
        !             9:  * where:
        !            10:  *     the character string will be filled with the name of
        !            11:  *     the port, preceded with '/dev/', and blank padded.
        !            12:  *     (19 is the max length ever required)
        !            13:  */
        !            14: 
        !            15: #include "../libI77/fiodefs.h"
        !            16: 
        !            17: extern unit units[];
        !            18: 
        !            19: ttynam_(name, strlen, lu)
        !            20: char *name; long strlen; long *lu;
        !            21: {
        !            22:        char *t = NULL, *ttyname();
        !            23: 
        !            24:        if (0 <= *lu && *lu < MXUNIT && units[*lu].ufd)
        !            25:                t = ttyname(fileno(units[*lu].ufd));
        !            26:        if (t == NULL)
        !            27:                t = "";
        !            28:        b_char(t, name, strlen);
        !            29: }

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