sed behavior on hp-ux

andy2000 · #1 (**permalink**) 05-04-2007

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

jim mcnamara · #2 (**permalink**) 05-04-2007

Code:

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

where \t is the actual tab character typed in from the terminal - note the last /

andy2000 · #3 (**permalink**) 05-04-2007

Sorry, but I 've said:

sed 's/^[ \t]*//' file # works only on Linux but NOT on HP-UX

jim mcnamara · #4 (**permalink**) 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

andy2000 · #5 (**permalink**) 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

jim mcnamara · #6 (**permalink**) 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.

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