TCSETPGRP(P) POSIX Programmer's Manual TCSETPGRP(P)PROLOG
This manual page is part of the POSIX Programmer's Manual. The Linux
implementation of this interface may differ (consult the corresponding
Linux manual page for details of Linux behavior), or the interface may
not be implemented on Linux.
NAMEtcsetpgrp - set the foreground process group ID
SYNOPSIS
#include <unistd.h>
int tcsetpgrp(int fildes, pid_t pgid_id);
DESCRIPTION
If the process has a controlling terminal, tcsetpgrp() shall set the
foreground process group ID associated with the terminal to pgid_id.
The application shall ensure that the file associated with fildes is
the controlling terminal of the calling process and the controlling
terminal is currently associated with the session of the calling
process. The application shall ensure that the value of pgid_id matches
a process group ID of a process in the same session as the calling
process.
Attempts to use tcsetpgrp() from a process which is a member of a back‐
ground process group on a fildes associated with its controlling termi‐
nal shall cause the process group to be sent a SIGTTOU signal. If the
calling process is blocking or ignoring SIGTTOU signals, the process
shall be allowed to perform the operation, and no signal is sent.
RETURN VALUE
Upon successful completion, 0 shall be returned. Otherwise, -1 shall be
returned and errno set to indicate the error.
ERRORS
The tcsetpgrp() function shall fail if:
EBADF The fildes argument is not a valid file descriptor.
EINVAL This implementation does not support the value in the pgid_id
argument.
ENOTTY The calling process does not have a controlling terminal, or the
file is not the controlling terminal, or the controlling termi‐
nal is no longer associated with the session of the calling
process.
EPERM The value of pgid_id is a value supported by the implementation,
but does not match the process group ID of a process in the same
session as the calling process.
The following sections are informative.
EXAMPLES
None.
APPLICATION USAGE
None.
RATIONALE
None.
FUTURE DIRECTIONS
None.
SEE ALSOtcgetpgrp() , the Base Definitions volume of IEEE Std 1003.1-2001,
<sys/types.h>, <unistd.h>
COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
Electrical and Electronics Engineers, Inc and The Open Group. In the
event of any discrepancy between this version and the original IEEE and
The Open Group Standard, the original IEEE and The Open Group Standard
is the referee document. The original Standard can be obtained online
at http://www.opengroup.org/unix/online.html .
IEEE/The Open Group 2003 TCSETPGRP(P)
