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Annotation of lucent/sys/man/1/tail, revision 1.1

1.1     ! root        1: .TH TAIL 1
        !             2: .SH NAME
        !             3: tail \- deliver the last part of a file
        !             4: .SH SYNOPSIS
        !             5: .B tail
        !             6: [
        !             7: .BR +- \fInumber\fP[ lbc ][ rf ]
        !             8: ]
        !             9: [
        !            10: .I file
        !            11: ]
        !            12: .PP
        !            13: .B tail
        !            14: [
        !            15: .B -fr
        !            16: ]
        !            17: [
        !            18: .B -n
        !            19: .I nlines
        !            20: ]
        !            21: [
        !            22: .B -c
        !            23: .I ncharacters
        !            24: ]
        !            25: [
        !            26: .I file
        !            27: ]
        !            28: .SH DESCRIPTION
        !            29: .I Tail
        !            30: copies the named file to the standard output beginning
        !            31: at a designated place.
        !            32: If no file is named, the standard input is copied.
        !            33: .PP
        !            34: Copying begins at position
        !            35: .BI + number
        !            36: measured from the beginning, or
        !            37: .BI - number
        !            38: from the end of the input.
        !            39: .I Number
        !            40: is counted in lines, 1K blocks or characters,
        !            41: according to the appended flag
        !            42: .LR l ,
        !            43: .LR b ,
        !            44: or
        !            45: .LR c .
        !            46: Default is
        !            47: .B -10l
        !            48: (ten ell).
        !            49: .PP
        !            50: The further flag
        !            51: .L r
        !            52: causes tail to print lines from the end of the file in reverse order;
        !            53: .L f
        !            54: (follow) causes
        !            55: .I tail,
        !            56: after printing to the end, to keep watch and
        !            57: print further data as it appears.
        !            58: .PP
        !            59: The second syntax is that promulgated by POSIX, where
        !            60: the
        !            61: .I numbers
        !            62: rather than the options are signed.
        !            63: .SH EXAMPLES
        !            64: .TP
        !            65: .B tail file
        !            66: Print the last 10 lines of a file.
        !            67: .TP
        !            68: .B tail +0f file
        !            69: Print a file, and continue to watch
        !            70: data accumulate as it grows.
        !            71: .TP
        !            72: .B sed 10q file
        !            73: Print the first 10 lines of a file.
        !            74: .SH SOURCE
        !            75: .B /sys/src/cmd/tail.c
        !            76: .SH BUGS
        !            77: Tails relative to the end of the file
        !            78: are treasured up in a buffer, and thus
        !            79: are limited in length.
        !            80: .br
        !            81: According to custom, option
        !            82: .BI + number
        !            83: counts lines from 1, and counts
        !            84: blocks and characters from 0.

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