VHANGUP(2)                (2016-03-15)                 VHANGUP(2)

     NAME
          vhangup - virtually hangup the current terminal

     SYNOPSIS
          #include <unistd.h>

          int vhangup(void);

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

          vhangup():
              Since glibc 2.21:
                  _DEFAULT_SOURCE
              In glibc 2.19 and 2.20:
                  _DEFAULT_SOURCE || (_XOPEN_SOURCE && _XOPEN_SOURCE < 500)
              Up to and including glibc 2.19:
                  _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 terminal 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  pro-
          grams intended to be portable.

     SEE ALSO
          init(1), capabilities(7)

     COLOPHON
          This page is part of release 5.10  of  the  Linux  man-pages
          project.   A  description  of the project, information about
          reporting bugs, and the latest version of this page, can  be
          found at https://www.kernel.org/doc/man-pages/.

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