mirror of https://github.com/mkerrisk/man-pages
85 lines
2.8 KiB
Plaintext
85 lines
2.8 KiB
Plaintext
.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved
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.TH "TCSETPGRP" 3P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual"
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.\" tcsetpgrp
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.SH NAME
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tcsetpgrp \- set the foreground process group ID
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.SH SYNOPSIS
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.LP
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\fB#include <unistd.h>
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.br
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.sp
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int tcsetpgrp(int\fP \fIfildes\fP\fB, pid_t\fP \fIpgid_id\fP\fB);
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.br
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\fP
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.SH DESCRIPTION
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.LP
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If the process has a controlling terminal, \fItcsetpgrp\fP() shall
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set the foreground process group ID associated with the
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terminal to \fIpgid_id\fP. The application shall ensure that the file
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associated with \fIfildes\fP is the controlling terminal of
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the calling process and the controlling terminal is currently associated
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with the session of the calling process. The application
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shall ensure that the value of \fIpgid_id\fP matches a process group
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ID of a process in the same session as the calling
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process.
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.LP
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Attempts to use \fItcsetpgrp\fP() from a process which is a member
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of a background process group on a \fIfildes\fP associated
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with its controlling terminal shall cause the process group to be
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sent a SIGTTOU signal. If the calling process is blocking or
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ignoring SIGTTOU signals, the process shall be allowed to perform
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the operation, and no signal is sent.
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.SH RETURN VALUE
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.LP
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Upon successful completion, 0 shall be returned. Otherwise, -1 shall
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be returned and \fIerrno\fP set to indicate the error.
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.SH ERRORS
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.LP
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The \fItcsetpgrp\fP() function shall fail if:
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.TP 7
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.B EBADF
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The \fIfildes\fP argument is not a valid file descriptor.
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.TP 7
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.B EINVAL
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This implementation does not support the value in the \fIpgid_id\fP
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argument.
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.TP 7
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.B ENOTTY
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The calling process does not have a controlling terminal, or the file
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is not the controlling terminal, or the controlling
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terminal is no longer associated with the session of the calling process.
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.TP 7
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.B EPERM
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The value of \fIpgid_id\fP is a value supported by the implementation,
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but does not match the process group ID of a process in
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the same session as the calling process.
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.sp
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.LP
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\fIThe following sections are informative.\fP
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.SH EXAMPLES
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.LP
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None.
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.SH APPLICATION USAGE
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.LP
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None.
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.SH RATIONALE
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.LP
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None.
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.SH FUTURE DIRECTIONS
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.LP
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None.
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.SH SEE ALSO
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.LP
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\fItcgetpgrp\fP() , the Base Definitions volume of IEEE\ Std\ 1003.1-2001,
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\fI<sys/types.h>\fP, \fI<unistd.h>\fP
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.SH COPYRIGHT
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Portions of this text are reprinted and reproduced in electronic form
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from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
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-- Portable Operating System Interface (POSIX), The Open Group Base
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Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
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Electrical and Electronics Engineers, Inc and The Open Group. In the
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event of any discrepancy between this version and the original IEEE and
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The Open Group Standard, the original IEEE and The Open Group Standard
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is the referee document. The original Standard can be obtained online at
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http://www.opengroup.org/unix/online.html .
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