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Redirecting STDERR message to STDOUT & file at same time

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# 8  
Old 04-09-2008
You have to put parenthesis !!!

Code:
$ ((cat foo 3>&1 1>&2 2>&3) | tee /dev/tty) > err.log
cat: 0652-050 Cannot open foo.
$ cat err.log
cat: 0652-050 Cannot open foo.


Quote:
Originally Posted by vikashtulsiyan
thanks man,
It works for most cases. But suppose if i give
cat nofile 3>&1 1>&2 2>&3) | tee /dev/tty > err.log


cat: cannot open nofile
is shown on screen only but not on err.log file

IS that not a STDERR msg
# 9  
Old 04-09-2008
Why don't you try out the followings ---:


Step 1 - " tail -f my_err_file & "
Step 2 - " make 2>my_err_file "

//If you are compiling through make

Let me know if it worked for you.
# 10  
Old 04-09-2008
am not creating a makefile. And the previous solution works great.
Thanks for ur help anyways
# 11  
Old 04-09-2008
Code:
vnix$ echo bar >bar

vnix$ (cat foo bar 2>&1 1>&3) 3>&2 | tee err.log
bar
cat: foo: No such file or directory

vnix$ cat err.log 
cat: foo: No such file or directory

The output is in slightly different order than I'd otherwise get because of buffering.
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