Solved

big tarfiles to lex

Posted on 1997-12-01
2
213 Views
Last Modified: 2010-04-21
I've very big tar-files with eMails in it.
My lex-Programm should work with the content of these files.
The Problem: When I pipe it to lex like this:
more tarfile | lexprogram >output
it ends with a broken pipe.
When I try it like this
lexprogram <tarfile >output
the program will abbort after the same time (I guess yywrap stopps the program).
0
Comment
Question by:bodirsky
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
2 Comments
 

Expert Comment

by:xilef
ID: 2008170
Hm, shouldn't you first extract your tarfile?

Something like:
cd /tmp/mydir
tar -xf /path/to/my/tarfile.tar
cat * | lexprogram

(The last line should probably be a loop for each of the files if there are really MANY files. The loop depends on the shell).

0
 
LVL 51

Accepted Solution

by:
ahoffmann earned 50 total points
ID: 2008171
tar files contain null bytes (0x0). Most lex flaviours treat this as an EOF. Your must take care for them before the default action (.)
Check your lex manual, or switch over to flex (which can handle null bytes ;-)
0

Featured Post

What Is Transaction Monitoring and who needs it?

Synthetic Transaction Monitoring that you need for the day to day, which ensures your business website keeps running optimally, and that there is no downtime to impact your customer experience.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

My previous tech tip, Installing the Solaris OS From the Flash Archive On a Tape (http://www.experts-exchange.com/articles/OS/Unix/Solaris/Installing-the-Solaris-OS-From-the-Flash-Archive-on-a-Tape.html), discussed installing the Solaris Operating S…
FreeBSD on EC2 FreeBSD (https://www.freebsd.org) is a robust Unix-like operating system that has been around for many years. FreeBSD is available on Amazon EC2 through Amazon Machine Images (AMIs) provided by FreeBSD developer and security office…
Learn how to get help with Linux/Unix bash shell commands. Use help to read help documents for built in bash shell commands.: Use man to interface with the online reference manuals for shell commands.: Use man to search man pages for unknown command…
Learn how to navigate the file tree with the shell. Use pwd to print the current working directory: Use ls to list a directory's contents: Use cd to change to a new directory: Use wildcards instead of typing out long directory names: Use ../ to move…

717 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question