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-.\" Copyright (c) 1980, 1990, 1991, 1993
-.\" The Regents of the University of California. All rights reserved.
-.\"
-.\" This code is derived from software contributed to Berkeley by
-.\" the Institute of Electrical and Electronics Engineers, Inc.
-.\"
-.\" Redistribution and use in source and binary forms, with or without
-.\" modification, are permitted provided that the following conditions
-.\" are met:
-.\" 1. Redistributions of source code must retain the above copyright
-.\" notice, this list of conditions and the following disclaimer.
-.\" 2. Redistributions in binary form must reproduce the above copyright
-.\" notice, this list of conditions and the following disclaimer in the
-.\" documentation and/or other materials provided with the distribution.
-.\" 3. All advertising materials mentioning features or use of this software
-.\" must display the following acknowledgement:
-.\" This product includes software developed by the University of
-.\" California, Berkeley and its contributors.
-.\" 4. Neither the name of the University nor the names of its contributors
-.\" may be used to endorse or promote products derived from this software
-.\" without specific prior written permission.
-.\"
-.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-.\" SUCH DAMAGE.
-.\"
-.\" @(#)tail.1 8.1 (Berkeley) 6/6/93
-.\"
-.Dd June 6, 1993
-.Dt TAIL 1
-.Os BSD 4
-.Sh NAME
-.Nm tail
-.Nd display the last part of a file
-.Sh SYNOPSIS
-.Nm tail
-.Op Fl f Li | Fl r
-.Oo
-.Fl b Ar number |
-.Fl c Ar number |
-.Fl n Ar number
-.Oc
-.Op Ar file ...
-.Sh DESCRIPTION
-The
-.Nm tail
-utility displays the contents of
-.Ar file
-or, by default, its standard input, to the standard output.
-.Pp
-The display begins at a byte, line or 512-byte block location in the
-input.
-Numbers having a leading plus (``+'') sign are relative to the beginning
-of the input, for example,
-.Dq -c +2
-starts the display at the second
-byte of the input.
-Numbers having a leading minus (``-'') sign or no explicit sign are
-relative to the end of the input, for example,
-.Dq -n 2
-displays the last two lines of the input.
-The default starting location is
-.Dq -n 10 ,
-or the last 10 lines of the input.
-.Pp
-The options are as follows:
-.Bl -tag -width Ds
-.It Fl b Ar number
-The location is
-.Ar number
-512-byte blocks.
-.It Fl c Ar number
-The location is
-.Ar number
-bytes.
-.It Fl f
-The
-.Fl f
-option causes
-.Nm tail
-to not stop when end of file is reached, but rather to wait for additional
-data to be appended to the input.
-The
-.Fl f
-option is ignored if the standard input is a pipe, but not if it is a FIFO.
-.It Fl n Ar number
-The location is
-.Ar number
-lines.
-.It Fl r
-The
-.Fl r
-option causes the input to be displayed in reverse order, by line.
-Additionally, this option changes the meaning of the
-.Fl b ,
-.Fl c
-and
-.Fl n
-options.
-When the
-.Fl r
-option is specified, these options specify the number of bytes, lines
-or 512-byte blocks to display, instead of the bytes, lines or blocks
-from the beginning or end of the input from which to begin the display.
-The default for the
-.Fl r
-option is to display all of the input.
-.El
-.Pp
-If more than a single file is specified, each file is preceded by a
-header consisting of the string
-.Dq ==> XXX <==
-where
-.Dq XXX
-is the name of the file.
-.Pp
-The
-.Nm tail
-utility exits 0 on success, and >0 if an error occurs.
-.Sh SEE ALSO
-.Xr cat 1 ,
-.Xr head 1 ,
-.Xr sed 1
-.Sh STANDARDS
-The
-.Nm tail
-utility is expected to be a superset of the POSIX 1003.2
-specification.
-In particular, the
-.Fl b
-and
-.Fl r
-options are extensions to that standard.
-.Pp
-The historic command line syntax of
-.Nm tail
-is supported by this implementation.
-The only difference between this implementation and historic versions
-of
-.Nm tail ,
-once the command line syntax translation has been done, is that the
-.Fl b ,
-.Fl c
-and
-.Fl n
-options modify the
-.Fl r
-option, i.e. ``-r -c 4'' displays the last 4 characters of the last line
-of the input, while the historic tail (using the historic syntax ``-4cr'')
-would ignore the
-.Fl c
-option and display the last 4 lines of the input.
-.Sh HISTORY
-A
-.Nm tail
-command appeared in
-.At v7 .
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