03-10-2008
Pulling multiple lines of text
Hello,
So, I'm not even sure if this will be possible for me to do (then again, that's why I'm asking for help
)
What I'm trying to do is pull multiple lines out of a very large text file, separating them into smaller files. Basically it's a text archive of a few hundred emails.
What I have to work with is I do have a constant start line and end line. What I've been doing so far is to grep for the start of a message (grepping for '^From:' While this will pull the one line I am unsure as to how I can then get the next x number of lines to record into some sort of new text file and then stop at the known end line. (at the moment it's 30 '+' symbols...I don't know why, that's how it came)
I'm thinking grep probably won't do all I want it to do. Should I be looking for something more along the lines of sed or awk?
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LEARN ABOUT REDHAT
prunehistory
PRUNEHISTORY(8) System Manager's Manual PRUNEHISTORY(8)
NAME
prunehistory - remove file names from Usenet history file
SYNOPSIS
prunehistory [ -f filename ] [ -p ]
DESCRIPTION
Prunehistory modifies the history(5) text file to ``remove'' a set of filenames from it. The filenames are removed by overwriting them
with spaces, so that the size and position of any following entries does not change.
Prunehistory reads the standard input. The input is taken as a set of lines. Blank lines and lines starting with a number sign (``#'')
are ignored. All other lines are should consist of a Message-ID followed by zero or more filenames.
The Message-ID is used as the dbz(3) key to get an offset into the text file. If no filenames are mentioned on the input line, then all
filenames in the text are ``removed.'' If any filenames are mentioned, they are converted into the history file notation. If they appear
in the line for the specified Message-ID then they are removed.
Since innd(8) only appends to the text file, prunehistory does not need to have any interaction with it.
OPTIONS
-p Prunehistory will normally complain about lines that do not follow the correct format. If the ``-p'' flag is used, then the program
will silently print any invalid lines on its standard output. (Blank lines and comment lines are also passed through.) This can be
useful when prunehistory is used as a filter for other programs such as reap.
-f The default name of the history file is <pathdb in inn.conf>/history; to specify a different name, use the ``-f'' flag.
HISTORY
Written by Rich $alz <rsalz@uunet.uu.net> for InterNetNews. This is revision 1.7, dated 1998/04/09.
SEE ALSO
dbz(3), history(5), inn.conf(5), innd(8).
PRUNEHISTORY(8)