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Old 01-10-2007, 07:56 PM   #1
xnomad
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Registered: Jun 2005
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grep output on stdout and grep output to file don't match


Hi when I grep a log file e.g

grep pattern /var/log/something

I get the full line of text line for line.

Now if I do

grep pattern /var/log/something > outputFile

The lines in the output are truncated there are words in the middle missing.

Any idea why redirecting the output to a file truncates the output?

I tried the following as well and this didn't work either:

grep pattern /var/log/something 2>&1 > outputFile

and if I do

grep -C 1 pattern /var/log/something > outputFile

I get more than I want in the file although it does include what I need.

Any ideas?
 
Old 01-11-2007, 05:17 AM   #2
unSpawn
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Registered: May 2001
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Interesting.
What distro+release?
What grep version?
Do you use a grep alias?
Bash completion?
Modified IFS?
Any characteristics missing words share?
Can you give an example of an output line and mark where word or words are missing?
 
Old 01-12-2007, 03:39 PM   #3
xnomad
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Registered: Jun 2005
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Sorry everyone please ignore my original post!


Turns out that the developers had turned on a more verbose output on the log only recently so not all the log had the same detail.

When greping without an output file I would see the bottom of the log where the verbose information was. When greping to a file and opening it in vi I would see the top of the file where the verbose output wasn't there. Of course if I had bothered to scroll down half way the verbose logging would have appeared.

I'm really sorry for waisting anyone's time!
 
Old 01-13-2007, 04:56 AM   #4
unSpawn
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NP, at least thanks for posting who the culprits are...
 
  


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