minix/lib/libc/termios/tcsetpgrp.3
Ben Gras 2fe8fb192f Full switch to clang/ELF. Drop ack. Simplify.
There is important information about booting non-ack images in
docs/UPDATING. ack/aout-format images can't be built any more, and
booting clang/ELF-format ones is a little different. Updating to the
new boot monitor is recommended.

Changes in this commit:

	. drop boot monitor -> allowing dropping ack support
	. facility to copy ELF boot files to /boot so that old boot monitor
	  can still boot fairly easily, see UPDATING
	. no more ack-format libraries -> single-case libraries
	. some cleanup of OBJECT_FMT, COMPILER_TYPE, etc cases
	. drop several ack toolchain commands, but not all support
	  commands (e.g. aal is gone but acksize is not yet).
	. a few libc files moved to netbsd libc dir
	. new /bin/date as minix date used code in libc/
	. test compile fix
	. harmonize includes
	. /usr/lib is no longer special: without ack, /usr/lib plays no
	  kind of special bootstrapping role any more and bootstrapping
	  is done exclusively through packages, so releases depend even
	  less on the state of the machine making them now.
	. rename nbsd_lib* to lib*
	. reduce mtree
2012-02-14 14:52:02 +01:00

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.\" $NetBSD: tcsetpgrp.3,v 1.10 2003/08/07 16:44:14 agc Exp $
.\"
.\" Copyright (c) 1991, 1993
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.\" @(#)tcsetpgrp.3 8.1 (Berkeley) 6/4/93
.\"
.Dd June 4, 1993
.Dt TCSETPGRP 3
.Os
.Sh NAME
.Nm tcsetpgrp
.Nd set foreground process group ID
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In unistd.h
.Ft int
.Fn tcsetpgrp "int fd" "pid_t pgrp_id"
.Sh DESCRIPTION
If the process has a controlling terminal, the
.Nm tcsetpgrp
function sets the foreground process group ID associated with the
terminal device to
.Fa pgrp_id .
The terminal device associated with
.Fa fd
must be the controlling terminal of the calling process and the
controlling terminal must be currently associated with the session
of the calling process.
The value of
.Fa pgrp_id
must be the same as the process group ID of a process in the same
session as the calling process.
.Pp
Upon successful completion,
.Nm tcsetpgrp
returns a value of zero.
.Sh ERRORS
If an error occurs,
.Nm tcgetpgrp
returns -1 and the global variable
.Va errno
is set to indicate the error, as follows:
.Bl -tag -width Er
.It Bq Er EBADF
The
.Fa fd
argument is not a valid file descriptor.
.It Bq Er EINVAL
An invalid value of
.Fa pgrp_id
was specified.
.It Bq Er ENOTTY
The calling process does not have a controlling terminal, or the file
represented by
.Fa fd
is not the controlling terminal, or the controlling terminal is no
longer associated with the session of the calling process.
.It Bq Er EPERM
The
.Fa pgrp_id
argument does not match the process group ID of a process in the same
session as the calling process.
.El
.Sh SEE ALSO
.Xr setpgid 2 ,
.Xr setsid 2 ,
.Xr tcgetpgrp 3
.Sh STANDARDS
The
.Nm tcsetpgprp
function conforms to
.St -p1003.1-90 .