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Annotation of 43BSDReno/bin/cat/cat.1, revision 1.1

1.1     ! root        1: .\" Copyright (c) 1989, 1990 The Regents of the University of California.
        !             2: .\" All rights reserved.
        !             3: .\"
        !             4: .\" Redistribution and use in source and binary forms are permitted provided
        !             5: .\" that: (1) source distributions retain this entire copyright notice and
        !             6: .\" comment, and (2) distributions including binaries display the following
        !             7: .\" acknowledgement:  ``This product includes software developed by the
        !             8: .\" University of California, Berkeley and its contributors'' in the
        !             9: .\" documentation or other materials provided with the distribution and in
        !            10: .\" all advertising materials mentioning features or use of this software.
        !            11: .\" Neither the name of the University nor the names of its contributors may
        !            12: .\" be used to endorse or promote products derived from this software without
        !            13: .\" specific prior written permission.
        !            14: .\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
        !            15: .\" WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
        !            16: .\" MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            17: .\"
        !            18: .\"     @(#)cat.1      6.12 (Berkeley) 7/24/90
        !            19: .\"
        !            20: .Dd July 24, 1990
        !            21: .Dt CAT 1
        !            22: .Os BSD 3
        !            23: .Sh NAME
        !            24: .Nm cat
        !            25: .Nd concatenate and print files
        !            26: .Sh SYNOPSIS
        !            27: .Nm cat
        !            28: .Op Fl benstuv
        !            29: .Op Fl
        !            30: .Ar
        !            31: .Sh DESCRIPTION
        !            32: The
        !            33: .Nm cat
        !            34: utility reads files sequentially, writing them to the standard output.
        !            35: The
        !            36: .Ar file
        !            37: operands are processed in command line order.
        !            38: A single dash represents standard input.
        !            39: .Pp
        !            40: The options are as follows:
        !            41: .Tw Ds
        !            42: .Tp Fl b
        !            43: Implies the
        !            44: .Fl n
        !            45: option but doesn't number blank lines.
        !            46: .Tp Fl e
        !            47: Implies the
        !            48: .Fl v
        !            49: option, and displays a dollar sign (``$'') at the end of each line
        !            50: as well.
        !            51: .Tp Fl n
        !            52: Number the
        !            53: .Ar output
        !            54: lines, starting at 1.
        !            55: .Tp Fl s
        !            56: Squeeze multiple adjacent empty lines, causing the output to be
        !            57: single spaced.
        !            58: .Tp Fl t
        !            59: Implies the
        !            60: .Fl v
        !            61: option, and displays tab characters as ``^I'' as well.
        !            62: .Tp Fl u
        !            63: The
        !            64: .Fl u
        !            65: option guarantees that the output is unbuffered.
        !            66: .Tp Fl v
        !            67: Displays non-printing characters so they are visible.
        !            68: Control characters print line ``^X'' for control-X; the delete
        !            69: character (octal 0177) prints as ``^?''.
        !            70: Non-ascii characters (with the high bit set) are printed as
        !            71: `.`M-'' (for meta) followed by the character for the low 7 bits.
        !            72: .Tp
        !            73: .Pp
        !            74: .Nm Cat
        !            75: is useful for getting files into a pipe, for instance, to sort
        !            76: two files together,
        !            77: the command
        !            78: .Pp
        !            79: .Dl cat file1 file2 | sort > sfile
        !            80: .Pp
        !            81: reads the contents of
        !            82: file1 and file2 sequentially, pipes it all to sort and places the
        !            83: newly sorted data in file3.
        !            84: .Pp
        !            85: Because of the shell language mechanism used to perform output
        !            86: redirection, the command ``cat file1 file 2 > file1'' will cause
        !            87: .P original data in file1 to be destroyed!
        !            88: .Pp
        !            89: .Nm Cat
        !            90: The cat utility exits 0 on success, and >0 if an error
        !            91: occurs.
        !            92: .Sh SEE ALSO
        !            93: .Xr head 1 ,
        !            94: .Xr more 1 ,
        !            95: .Xr pr 1 ,
        !            96: .Xr tail 1
        !            97: .Pp
        !            98: Rob Pike,
        !            99: .Em UNIX Style, or cat -v Considered Harmful
        !           100: USENIX Summer Conference Proceedings, 1983.
        !           101: .Sh HISTORY
        !           102: The
        !           103: .Nm
        !           104: command appeared in Version 7 AT&T UNIX.

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