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+.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved 
+.TH "GETPGRP" 3P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual"
+.\" getpgrp 
+.SH 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.
+.SH NAME
+getpgrp \- get the process group ID of the calling process
+.SH SYNOPSIS
+.LP
+\fB#include <unistd.h>
+.br
+.sp
+pid_t getpgrp(void);
+.br
+\fP
+.SH DESCRIPTION
+.LP
+The \fIgetpgrp\fP() function shall return the process group ID of
+the calling process.
+.SH RETURN VALUE
+.LP
+The \fIgetpgrp\fP() function shall always be successful and no return
+value is reserved to indicate an error.
+.SH ERRORS
+.LP
+No errors are defined.
+.LP
+\fIThe following sections are informative.\fP
+.SH EXAMPLES
+.LP
+None.
+.SH APPLICATION USAGE
+.LP
+None.
+.SH RATIONALE
+.LP
+4.3 BSD provides a \fIgetpgrp\fP() function that returns the process
+group ID for a specified process. Although this function
+supports job control, all known job control shells always specify
+the calling process with this function. Thus, the simpler System
+V \fIgetpgrp\fP() suffices, and the added complexity of the 4.3 BSD
+\fIgetpgrp\fP() is provided by the XSI extension \fIgetpgid\fP().
+.SH FUTURE DIRECTIONS
+.LP
+None.
+.SH SEE ALSO
+.LP
+\fIexec\fP(), \fIfork\fP(), \fIgetpgid\fP(), \fIgetpid\fP(), \fIgetppid\fP(),
+\fIkill\fP(), \fIsetpgid\fP(), \fIsetsid\fP(), the
+Base Definitions volume of IEEE\ Std\ 1003.1-2001, \fI<sys/types.h>\fP,
+\fI<unistd.h>\fP
+.SH 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 .