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LOGTAIL(8)			logtail	manual			    LOGTAIL(8)

NAME
       logtail - print log file	lines that have	not been read

SYNOPSIS
       logtail [-t] -flogfile [-ooffsetfile]

DESCRIPTION
       logtail	reads  a specified file	(usually a log file) and writes	to the
       standard	output that part of it which has not  been  read  by  previous
       runs  of	 logtail.   It prints the appropriate number of	bytes from the
       end of logfile, assuming	that all changes that are made to  it  are  to
       add new characters to it.

       logfile must be a plain file.  A	symlink	is not allowed.

       logtail	stores	the  information about how much	of it has already been
       read in a separate file called offsetfile.  offsetfile can be  omitted.
       If  omitted,  the file named logfile.offset in the same directory which
       contains	logfile	is used	by default.

       If offsetfile is	not empty, the inode of	logfile	is  checked.   If  the
       inode  is changed, logtail simply prints	the entire file.  If the inode
       is not changed but logfile is shorter than it was at the	 last  run  of
       logtail,	it writes a warning message to the standard output.

OPTIONS
       -f     logfile to be read after offset

       -o     offsetfile stores	offset of previous run

       -t     test mode	- do not change	offset in offsetfile

RETURN VALUES
       0      successful

       65     cannot get the size of logfile

       66     logfile does not exist, is not a plain file, or is not readable

       73     cannot write offsetfile

AUTHOR
       The  original  logtail  was  written  in	 C  by Craig H.	Rowland	<crow-
       land@psionic.com>.  This	version	of logtail is a	Perl  reimplementation
       by  Paul	 Slootman  <paul@debian.org>.  Enhanced	by the Debian Logcheck
       Team <logcheck-devel@lists.alioth.debian.org>.

       This manual was written by Oohara Yuuma <oohara@libra.interq.or.jp>.

SEE ALSO
       logcheck(8)

Debian			       Fri, 19 Nov 2004			    LOGTAIL(8)

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | RETURN VALUES | AUTHOR | SEE ALSO

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