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Annotation of cci/usr/src/man/man3/fork.3f, revision 1.1

1.1     ! root        1: .TH FORK 3F "13 June 1983"
        !             2: .UC 4
        !             3: .SH NAME
        !             4: fork \- create a copy of this process
        !             5: .SH SYNOPSIS
        !             6: .B integer function fork()
        !             7: .SH DESCRIPTION
        !             8: .I Fork
        !             9: creates a copy of the calling process.
        !            10: The only distinction between the 2 processes is that the value
        !            11: returned to one of them (referred to as the 'parent' process)
        !            12: will be the process id if the copy.
        !            13: The copy is usually referred to as the 'child' process.
        !            14: The value returned to the 'child' process will be zero.
        !            15: .PP
        !            16: All logical units open for writing are flushed before the fork to avoid
        !            17: duplication of the contents of I/O buffers in the external file(s).
        !            18: .PP
        !            19: If the returned value is negative, it indicates an error and will be
        !            20: the negation of the system error code.
        !            21: See perror(3F).
        !            22: .PP
        !            23: A corresponding
        !            24: .I exec
        !            25: routine has not been provided because there is no satisfactory way to
        !            26: retain open logical units across the exec.
        !            27: However, the usual function of
        !            28: .I fork/exec
        !            29: can be performed using
        !            30: .IR system (3F).
        !            31: .if 0 \{
        !            32: A pipe can be opened to another process using the f77
        !            33: .B open
        !            34: statement with
        !            35: .sp 1
        !            36: .ti +5
        !            37: .B "file=\(fm\fIprocess\fB\(fm, status=\(fmpipe\(fm, access=\(fmread\(fm"
        !            38: .br
        !            39: or
        !            40: .br
        !            41: .ti +5
        !            42: .B "file=\(fm\fIprocess\fB\(fm, status=\(fmpipe\(fm, access=\(fmwrite\(fm"
        !            43: \}
        !            44: .SH FILES
        !            45: .ie \nM /usr/ucb/lib/libU77.a
        !            46: .el /usr/lib/libU77.a
        !            47: .SH "SEE ALSO"
        !            48: fork(2), wait(3F), kill(3F), system(3F), perror(3F)

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