05-02-2011
appending a blank line for a group of files at the end
hi,
i m having a group of files starting with name 'Itemdelete<timestamp>' .
my requirment is to append a blank line at the end of files ,using unix in all the Itemdelete* files with a single unix command without using scripts.can any body put some light to this requiremnt.
regards
Angel
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LEARN ABOUT FREEBSD
filechan
FILECHAN(8) System Manager's Manual FILECHAN(8)
NAME
filechan - file-writing backend for InterNetNews
SYNOPSIS
filechan [ -d directory ] [ -f fields ] [ -m mapfile ] [ -p pidfile ]
DESCRIPTION
Filechan reads lines from standard input and copies certain fields in each line into files named by other fields within the line. Filechan
is intended to be called by innd(8) as a channel feed. (It is not a full exploder and does not accept commands; see newsfeeds(5) for a
description of the difference and buffchan(8) for an exploder program.)
Filechan input is interpreted as a set of lines. Each line contains a fixed number of initial fields, followed by a variable number of
filename fields. All fields in a line are separated by whitespace. The default number of initial fields is one.
For each line of input, filechan writes the initial fields, separated by whitespace and followed by a newline, to each of the files named
in the filename fields. When writing to a file, filechan opens it in append mode and tries to lock it and change the ownership to the user
and group who owns the directory where the file is being written.
OPTIONS
-f The ``-f'' flag may be used to specify a different number of fields.
-d By default, filechan writes its arguments into the directory /var/spool/news/out.going. The ``-d'' flag may be used to specify a
directory the program should change to before starting.
-p If the ``-p'' flag is used, the program will write a line containing its process ID (in text) to the specified file.
If filechan is invoked with ``-f 2'' and given the following input:
news/software/b/132 <1643@munnari.oz.au> foo uunet
news/software/b/133 <102060@litchi.foo.com> uunet munnari
comp/sources/unix/2002 <999@news.foo.com> foo uunet munnari
Then the file foo will have these lines:
news/software/b/132 <1643@munnari.oz.au>
comp/sources/unix/2002 <999@news.foo.com>
the file munnari will have these lines:
news/software/b/133 <102060@litchi.foo.com>
comp/sources/unix/2002 <999@news.foo.com>
and the file uunet will have these lines:
news/software/b/132 <1643@munnari.oz.au>
news/software/b/133 <102060@litchi.foo.com>
comp/sources/unix/2002 <999@news.foo.com>
Because the time window in which a file is open is very small, complicated flushing and locking protocols are not needed; a mv(1) followed
by a sleep(1) for a couple of seconds is sufficient.
-m A map file may be specified by using the ``-m'' flag. Blank lines and lines starting with a number sign (``#'') are ignored. All
other lines should have two host names separated by a colon. The first field is the name that may appear in the input stream; the
second field names the file to be used when the name in the first field appears. For example, the following map file may be used to
map the short names above to the full domain names:
# This is a comment
uunet:news.uu.net
foo:foo.com
munnari:munnari.oz.au
HISTORY
Written by Robert Elz <kre@munnari.oz.au>, flags added by Rich $alz <rsalz@uunet.uu.net>. This is revision 1.19, dated 1996/10/29.
SEE ALSO
buffchan(8), innd(8), newsfeeds(5).
FILECHAN(8)