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Annotation of researchv10dc/man/manb/vhangup.2v, revision 1.1

1.1     ! root        1: .TH VHANGUP 2V
        !             2: .UC 4
        !             3: .SH NAME
        !             4: vhangup \- virtually ``hangup'' the current control terminal
        !             5: .SH SYNOPSIS
        !             6: .B vhangup()
        !             7: .SH DESCRIPTION
        !             8: .I Vhangup
        !             9: is used by the initialization process
        !            10: .IR init (8)
        !            11: to arrange that users are given \*(lqclean\*(rq' terminals at login,
        !            12: by revoking access of the previous users' processes to the terminal.
        !            13: To effect this,
        !            14: .I vhangup
        !            15: searches the system tables for references to the control terminal
        !            16: of the invoking process, revoking access permissions
        !            17: on each instance of the terminal which it finds.
        !            18: Further attempts to access the terminal by the affected processes
        !            19: will yield i/o errors (EBADF).
        !            20: Finally,
        !            21: a hangup signal (SIGHUP) is sent to the process group of the
        !            22: control terminal.
        !            23: .SH SEE ALSO
        !            24: init (8)
        !            25: .SH BUGS
        !            26: Access to
        !            27: the control terminal via
        !            28: .B /dev/tty
        !            29: is still possible.
        !            30: .PP
        !            31: This call is peculiar to this version of UNIX.
        !            32: The options and specifications of this system call and even the call itself
        !            33: are subject to change.

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