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vhangup(2) [ultrix man page]

vhangup(2)							System Calls Manual							vhangup(2)

       vhangup - virtually hang up the current control terminal

       void vhangup()

       The  system call initializes a terminal line.  For example, the command uses to ensure that the previous user's processes cannot access the
       terminal anymore.

       First, searches the system tables for references to the current terminal (the control terminal of the invoking process) and revokes  access
       permissions on each instance of the terminal that it finds.

       The  system  call also removes all references to the inode that corresponds to the control terminal.  The system call then invokes the ker-
       nel's device close routine to turn the terminal off.  Finally, sends a hangup signal (SIGHUP) to the process group of the control terminal.
       For further information, see for a description of process groups.

       When  finishes, a terminal line is initialized; no other processes refer to this line.  The only way for other processes to access the con-
       trol terminal is through the special file, All other requests will yield I/O errors (EBADF).

See Also


Check Out this Related Man Page

ul(1)							      General Commands Manual							     ul(1)

       ul - process underscores for terminal

       ul [-i] [-t terminal] [name...]

       The  command  reads  the  named files (or standard input if none are given) and translates occurrences of underscores to the sequence which
       indicates underlining for the terminal in use, as specified by the environment variable TERM.  The -t option overrides  the  terminal  kind
       specified  in  the  environment.  The file /etc/termcap is read to determine the appropriate sequences for underlining.	If the terminal is
       incapable of underlining, but is capable of a standout mode then that is used instead.  If the terminal can overstrike, or  handles  under-
       lining automatically, degenerates to If the terminal cannot underline, underlining is ignored.

       The  -i option causes to indicate underlining by a separate line containing appropriate dashes `-'; this is useful when you want to look at
       the underlining which is present in an output stream on a crt-terminal.

       -i Displays underscoring on separate line containing appropriate dashes (-).

       -t terminal
	  Uses type of specified terminal in place your terminal's type.

       The command usually outputs a series of backspaces and underlines intermixed with the text to indicate underlining.  No attempt is made	to
       optimize the backward motion.

See Also
       man(1), nroff(1), colcrt(1)

Man Page

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