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Undocumented cut feature


From: Gambs, David (CONT)
Subject: Undocumented cut feature
Date: Thu, 25 Oct 2007 09:05:08 -0400

I have found a consistent "feature" in cut that is causing issues for
what I am trying to accomplish.

I am pulling data from the system and trying to extract three pieces out
of that data. What I am finding is that when the field of interest is
the last field, cut is adding a ^M to the end of the line:

vgdisplay > file1
cat file1 | egrep -e Name -e "PE Size" -e Free > file2
cut -b23- file2 > file3
cut -f1 -d' ' > file1

It is only at the last step that the ^M is added to the end of the
volume group name extracted. I do not think that this should be
happening. The other lines do not have the ^M appended. I have tried
using a fourth file, but the error persists so I believe this is within
the utility itself. I do not see this happening on HP-UX using the same
basic code and method.

>From /proc the version is:

Linux version 2.4.21-47.ELsmp (address@hidden)
(gcc version 3.2.3 20030502 (Red Hat Linux 3.2.3-54)) #1 SMP Wed Jul 5
20:38:41 EDT 2006

And from /etc/redhat-release:

Red Hat Enterprise Linux AS release 3 (Taroon Update 6)

And we are at core utilities: coreutils-4.5.3-28.4

> Regards,
> David M Gambs
> Linux Engineer
> Solutions Engineering
> IBM/CapitalOne
> Int: 433-6519
> Ext: 804-284-6519
> cell: 804-201-3499
> 



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