vhangup(8) [plan9 man page]

VHANGUP(8)						       The SuSE boot concept							VHANGUP(8)

NAME

       Vhangup - Cause a virtually hangup on the specified terminals

SYNOPSIS

       vhangup [/dev/<terminal> [/dev/<terminal>]]

DESCRIPTION

       vhangup simulates a hangup on the specified terminals.  Not existing device files or devices will be ignored.

EXAMPLES

       vhangup /dev/tty1 /dev/tty2 /dev/tty3 /dev/tty4 /dev/tty5 /dev/tty6 /dev/ttyS1

       This  will replace all open file descriptors in the kernel that points to the listed ttys by a dummy that will deny further reading/writing
       to the device. It also send the signals SIGHUP/SIGCONT to the processes which have file descriptors open on the listed ttys.

RETURN VALUE

       On success, zero is returned.  On error, 1 is returned.

SEE ALSO

       vhangup(2), tty(4), ttyS(4), pts(4).

COPYRIGHT

       2008 Werner Fink, 2008 SUSE LINUX Products GmbH, Germany.

AUTHOR

       Werner Fink <werner@suse.de>

3rd Berkeley Distribution					   Jan 31, 2008 							VHANGUP(8)

VHANGUP(2)						     Linux Programmer's Manual							VHANGUP(2)

NAME

       vhangup - virtually hangup the current tty

SYNOPSIS

       #include <unistd.h>

       int vhangup(void);

   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

       vhangup(): _BSD_SOURCE || (_XOPEN_SOURCE && _XOPEN_SOURCE < 500)

DESCRIPTION

       vhangup() simulates a hangup on the current terminal.  This call arranges for other users to have a "clean" tty at login time.

RETURN VALUE

       On success, zero is returned.  On error, -1 is returned, and errno is set appropriately.

ERRORS

       EPERM  The calling process has insufficient privilege to call vhangup(); the CAP_SYS_TTY_CONFIG capability is required.

CONFORMING TO

       This call is Linux-specific, and should not be used in programs intended to be portable.

SEE ALSO

       capabilities(7), init(8)

COLOPHON

       This  page is part of release 3.44 of the Linux man-pages project.  A description of the project, and information about reporting bugs, can
       be found at http://www.kernel.org/doc/man-pages/.

Linux								    2007-07-26								VHANGUP(2)