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Annotation of 43BSDTahoe/man/man2/getpgrp.2, revision 1.1

1.1     ! root        1: .\" Copyright (c) 1983 Regents of the University of California.
        !             2: .\" All rights reserved.  The Berkeley software License Agreement
        !             3: .\" specifies the terms and conditions for redistribution.
        !             4: .\"
        !             5: .\"    @(#)getpgrp.2   6.3 (Berkeley) 8/26/85
        !             6: .\"
        !             7: .TH GETPGRP 2 "August 26, 1985"
        !             8: .UC 5
        !             9: .SH NAME
        !            10: getpgrp \- get process group
        !            11: .SH SYNOPSIS
        !            12: .ft B
        !            13: .nf
        !            14: pgrp = getpgrp(pid)
        !            15: int pgrp;
        !            16: int pid;
        !            17: .fi
        !            18: .ft R
        !            19: .SH DESCRIPTION
        !            20: The process group of the specified process is returned by
        !            21: .I getpgrp.
        !            22: If
        !            23: .I pid
        !            24: is zero, then the call applies to the current process.
        !            25: .PP
        !            26: Process groups are used for distribution of signals, and
        !            27: by terminals to arbitrate requests for their input: processes
        !            28: that have the same process group as the terminal are foreground
        !            29: and may read, while others will block with a signal if they attempt
        !            30: to read.
        !            31: .PP
        !            32: This call is thus used by programs such as
        !            33: .IR csh (1)
        !            34: to create
        !            35: process groups
        !            36: in implementing job control.
        !            37: The TIOCGPGRP and TIOCSPGRP calls
        !            38: described in
        !            39: .IR tty (4)
        !            40: are used to get/set the process group of the control terminal.
        !            41: .SH "SEE ALSO"
        !            42: setpgrp(2), getuid(2), tty(4)

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