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Annotation of cci/usr/src/man/man2/getpgrp.2, revision 1.1

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

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