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sed behavior on hp-ux

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# 1  
Old 05-04-2007
sed behavior on hp-ux
the sed command:

sed 's/^[ \t]*//' file

does not work on HP-UX :-( but it works fine on Linux,

content of file:
<tab><tab>hello

output should be:
hello

Any ideas??

Thank you

Andy
Last edited by andy2000; 05-04-2007 at 03:19 PM..
# 2  
Old 05-04-2007
Code:
sed 's/^[ \t]*//' file

where \t is the actual tab character typed in from the terminal - note the last /
# 3  
Old 05-04-2007
Sorry, but I 've said:

sed 's/^[ \t]*//' file # works only on Linux but NOT on HP-UX
# 4  
Old 05-04-2007
I ran it on HPUX 11.0 and 11.23 works just fine. There must be something else other than your sed command going on. The sed string you have removes ONE tab not all of them. Is that what you mean by 'does not work' ?

Code:
sed 's/^[ \t]*//g'

will remove all of them
# 5  
Old 05-04-2007
Jim,

please try the command to remove a lot of white spaces:

content of file:
<space><space><tab><space><tab><space><tab>hello

Andy
# 6  
Old 05-04-2007
Code:
sed 's/^[        ]*//' file

doee not work, you are correct

Code:
kcsdev:/home/jmcnama> echo "                             hello" | sed 's/^[        ]*//'
hello

It does work on stdin.
Code:
kcsdev:/home/jmcnama> sed 's/^[        ]*//' < file
                                 hello
kcsdev:/home/jmcnama> cat file | sed 's/^[        ]*//'
                                 hello

It just refuses to work on a file, regardless of whether it is stdin or not. That does not make sense.

This works on a file:
Code:
while read record
do
     echo $record |  sed 's/^[        ]*//
done < file > newfile

I do not understand, but it is a workaround.
# 7  
Old 05-04-2007
HPUX 11.23 does not have this problem - I just checked - I was using 11.0.
I am assuming it is a bug.
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