Sponsored Content
Full Discussion: Strange RegExp Behaviour
Top Forums Shell Programming and Scripting Strange RegExp Behaviour Post 302502263 by itskov on Monday 7th of March 2011 12:02:31 PM
Old 03-07-2011
I agree it does but it also captures thing I wouldn't want to catch like - GGGGG

Try running -
echo 'GGGGGGGG' | egrep '(.)([^\1]\2\1'

And you'll get GGGGGG echoed on the screen.

I wouldn't want it to capture anything else but thing of the form 'xyyx'.

Thanks a lot.
Eyal.
 

9 More Discussions You Might Find Interesting

1. Linux

/etc/passwd strange behaviour!

Hi there, first of all, here is my conf of a uname -a Linux SAMBA 2.4.18-4GB #1 Wed Mar 27 13:57:05 UTC 2002 i686 unknown on a fedora machine. Here is my problem: every once in a while, the line containing root disappears in the /etc/passwd, disabling all logging on my server. Any one have... (0 Replies)
Discussion started by: penguin-friend
0 Replies

2. Shell Programming and Scripting

A Strange Behaviour!!!

Can some-one give me a view to this : I have a directory in an unix server, having permissions r-xr-xr-x .This directory is basically a source directory. Now there is another directory basically the destination directory which has all the permissions. Note:I log in as not the owner,but user... (5 Replies)
Discussion started by: navojit dutta
5 Replies

3. UNIX for Advanced & Expert Users

Strange sed behaviour

$ echo a.bc | sed -e "s/\|/\\|/g" |a|.|b|c| $ Is the behavior of the sed statement expected ? Or is this a bug in sed ? OS details Linux 2.6.9-55.0.0.0.2.ELsmp #1 SMP Wed May 2 14:59:56 PDT 2007 i686 i686 i386 GNU/Linux (8 Replies)
Discussion started by: vino
8 Replies

4. UNIX for Dummies Questions & Answers

Strange Program behaviour

Had a strange thing going on with my code. It's ok I figured it out for myself.... (2 Replies)
Discussion started by: mrpugster
2 Replies

5. Shell Programming and Scripting

strange behaviour from sed???

Hi all, I want to do a very simple thing with sed. I want to print out the line number of a disk I have defined in /etc/exports, so I do: It's all good, but here's the problem. When I define md0 in a variable, I get nothing from sed: Why is that? can anybody please help? Thanks (2 Replies)
Discussion started by: alirezan
2 Replies

6. IP Networking

Strange network behaviour in Solaris 10

Hi folks how can this be explained? Cheers Spacerat ---- tom@jumpstart:~$ cat /etc/resolv.conf domain acceleris.ch nameserver 192.168.21.230 tom@jumpstart:~$ nslookup Google 192.168.21.230 Server: 192.168.21.230 Address: 192.168.21.230#53 Non-authoritative answer:... (2 Replies)
Discussion started by: Spacerat
2 Replies

7. Shell Programming and Scripting

Strange behaviour with perl i/o?

Hi All, I got a strange problem here. I have a perl script which is fetching data from a database table and writing a file with that data. If i run that script from linux command line, the file it creates is a normal ascii text file without any binary character in it.But... (9 Replies)
Discussion started by: DILEEP410
9 Replies

8. HP-UX

Strange login behaviour

Hi all, I am using HP-UX and I have just noticed that when I log into the network it seems to save the previous windows that were subsequently closed on previous occasions. Does anyone know when I log in, it seems to display these previous windows, e.g. nedit windows open again? Does... (1 Reply)
Discussion started by: cyberfrog
1 Replies

9. Red Hat

Crontab strange behaviour

Hi all, I'm having this scenario which for the moment I cannot resolve. :( I wrote a script to make a dump/export of the oracle database. and then put this entry on crontab to be executed daily for example. The script is like below: cat /home/oracle/scripts/db_backup.sh #!/bin/ksh ... (3 Replies)
Discussion started by: enux
3 Replies
EVTEST-CAPTURE(1)														 EVTEST-CAPTURE(1)

NAME
evtest-capture - Input device event capture program SYNOPSIS
evtest-capture "/dev/input/eventX" [evtest-capture.xml] DESCRIPTION
evtest-capture captures the information and events from the input device specified on the command line and writes it to the xml file given. If no filename is given for the output file, evtest-capture.xml is chosen as default. evtest-capture needs to be able to read from the device; in most cases this means it must be run as root. Together with with evtest-create-device.xsl, a simple uinput-based software input device can be created that replays the events as if the same input was performed on the physical device. This can be useful to replicate bugs with input devices in upper layers of the stack. To convert evtest-capture.xml into such a uinput device, run: xsltproc evtest-create-device.xls evtest-capture.xml > mydevice.c gcc -o mydevice mydevice.c ./mydevice DIAGNOSTICS
If evtest-capture does not see any events even though the device is being used, the device may be grabbed by a process (EVIOCGRAB). This is usually the case when debugging a synaptics device from within X. VT switching to a TTY or shutting down the X server terminates this grab and synaptics devices can be debugged. SEE ALSO
evtest(1) AUTHOR
evtest-capture was written by Peter Hutterer <peter.hutterer@redhat.com[1]>. NOTES
1. peter.hutterer@redhat.com mailto:peter.hutterer@redhat.com 05/21/2012 EVTEST-CAPTURE(1)
All times are GMT -4. The time now is 10:28 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy