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Annotation of 43BSD/lib/libc/gen/ttyslot.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1984 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: 
        !             7: #if defined(LIBC_SCCS) && !defined(lint)
        !             8: static char sccsid[] = "@(#)ttyslot.c  5.2 (Berkeley) 3/9/86";
        !             9: #endif LIBC_SCCS and not lint
        !            10: 
        !            11: /*
        !            12:  * Return the number of the slot in the utmp file
        !            13:  * corresponding to the current user: try for file 0, 1, 2.
        !            14:  * Definition is the line number in the /etc/ttys file.
        !            15:  */
        !            16: #include <ttyent.h>
        !            17: 
        !            18: char   *ttyname();
        !            19: char   *rindex();
        !            20: 
        !            21: #define        NULL    0
        !            22: 
        !            23: ttyslot()
        !            24: {
        !            25:        register struct ttyent *ty;
        !            26:        register char *tp, *p;
        !            27:        register s;
        !            28: 
        !            29:        if ((tp = ttyname(0)) == NULL &&
        !            30:            (tp = ttyname(1)) == NULL &&
        !            31:            (tp = ttyname(2)) == NULL)
        !            32:                return(0);
        !            33:        if ((p = rindex(tp, '/')) == NULL)
        !            34:                p = tp;
        !            35:        else
        !            36:                p++;
        !            37:        setttyent();
        !            38:        s = 0;
        !            39:        while ((ty = getttyent()) != NULL) {
        !            40:                s++;
        !            41:                if (strcmp(ty->ty_name, p) == 0) {
        !            42:                        endttyent();
        !            43:                        return (s);
        !            44:                }
        !            45:        }
        !            46:        endttyent();
        !            47:        return (0);
        !            48: }

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