chvt(1) [debian man page]

CHVT(1) 						      General Commands Manual							   CHVT(1)

NAME

       chvt - change foreground virtual terminal

SYNOPSIS

       chvt N

DESCRIPTION

       The  command  chvt N makes /dev/ttyN the foreground terminal.  (The corresponding screen is created if it did not exist yet.  To get rid of
       unused VTs, use deallocvt(1).)  The key combination (Ctrl-)LeftAlt-FN (with N in the range 1-12) usually has a similar effect.

								  26 January 1997							   CHVT(1)

tcgetpgrp(3C)															     tcgetpgrp(3C)

NAME

       tcgetpgrp() - get foreground process group id

SYNOPSIS

DESCRIPTION

       returns	the  value  of the process group ID of the foreground process group associated with the terminal referenced by fildes.	is allowed
       from a process that is a member of a background process group (see termio(7)); however, the information can be subsequently  changed  by  a
       process that is a member of a foreground process group.

RETURN VALUE

       Upon  successful  completion, returns the value of the process group ID of the foreground process group associated with the terminal refer-
       enced by fildes.  Otherwise, returns a value of -1 and sets to indicate the error.

ERRORS

       fails if any of the following conditions are encountered:

	      The file associated with
			     fildes is the controlling terminal of the calling process, however, there is no foreground process group defined  for
			     the controlling terminal.

	      fildes	     is not a valid file descriptor.

	      The file associated with
			     fildes is not the controlling terminal or the calling process does not have a controlling terminal.

WARNINGS

       The  error which is returned if the controlling terminal has no foreground process group, might not be returned in future releases, depend-
       ing on the course taken by the POSIX standard.  Portable applications therefore should not rely on this error condition.

SEE ALSO

       setpgid(2), setsid(2), tcsetpgrp(3C), thread_safety(5), termio(7).

STANDARDS CONFORMANCE

																     tcgetpgrp(3C)