Guys!!

I need some in removing double quotes from a command output.
Actually , as a result of command , i am getting a device name
surrounded by double quotes.

Output something like that "

parent = "ide0"

but this device name varies in length so i wish to find any way to
remove these double quotes and give me only ide0 or pci4 etc... that
is no more double quotes...

How can i so that ... please me

Thanks and best regards

Polani

Polani wrote:
> Guys!!
>
> I need some in removing double quotes from a command output.
> Actually , as a result of command , i am getting a device name
> surrounded by double quotes.
>
> Output something like that "
>
> parent = "ide0"
>
> but this device name varies in length so i wish to find any way to
> remove these double quotes and give me only ide0 or pci4 etc... that
> is no more double quotes...
>
> How can i so that ... please me
>
> Thanks and best regards
>
> Polani

I am suprised it is giving you a problem. You can always assign it to
itself as an extra step so long as there will be no spaces in the name.

parent=$parent

2006-12-2, 23:59(-08), Polani:
> Guys!!
>
> I need some in removing double quotes from a command output.
> Actually , as a result of command , i am getting a device name
> surrounded by double quotes.
>
> Output something like that "
>
> parent = "ide0"
>
> but this device name varies in length so i wish to find any way to
> remove these double quotes and give me only ide0 or pci4 etc... that
> is no more double quotes...
[...]

echo 'parent = "ide0"' | tr -d '"'

--
Stéphane

"Polani" <kshiraz12@hotmail.com> wrote in message
news:1165132778.849241.47970@j72g2000cwa.googlegro ups.com...
> Guys!!
>
> I need some in removing double quotes from a command output.
> Actually , as a result of command , i am getting a device name
> surrounded by double quotes.
>
> Output something like that "
>
> parent = "ide0"
>
> but this device name varies in length so i wish to find any way to
> remove these double quotes and give me only ide0 or pci4 etc... that
> is no more double quotes...
[...]


$ eval echo 'parent = "ide0"'
parent = ide0


Regards
Dimitre

On 2006-12-03, Polani wrote:
> Guys!!
>
> I need some in removing double quotes from a command output.
> Actually , as a result of command , i am getting a device name
> surrounded by double quotes.
>
> Output something like that "
>
> parent = "ide0"
>
> but this device name varies in length so i wish to find any way to
> remove these double quotes and give me only ide0 or pci4 etc... that
> is no more double quotes...

You could use cut with the -f and -d options:

cut -d \" -f2


Or awk:

awk -F\" '{ print $2 }'


Or sed:

sed 's/.*\"\([^\"]*\)\".*/\1/'


Or, if you have it in a variable, use the shell field separator:

dev='parent = "ide0"'
set -f
IFS=\"
set -- $dev
dev=$2


Or parameter expansion:

dev='parent = "ide0"'
dev=${dev#*\"}
dev=${dev%\"*}


--
Chris F.A. Johnson, author <http://cfaj.freeshell.org/shell>
Shell Scripting Recipes: A Problem-Solution Approach (2005, Apress)
===== My code in this post, if any, assumes the POSIX locale
===== and is released under the GNU General Public Licence

2006-12-3, 12:26(-05), Chris F.A. Johnson:
[...]
> Or parameter expansion:
>
> dev='parent = "ide0"'
> dev=${dev#*\"}
> dev=${dev%\"*}
[...]

Or simply expr:

dev=$(
expr "$dev" : 'parent = "\(.*\)"'
)

zsh specific:

dev=${dev/(#b)parent = \"(*)\"/$match[1]}

Or:

if [[ $dev = 'parent = "'(*)'"' ]]; then
dev=$match[1]
fi

--
Stéphane

Stephane CHAZELAS wrote:
> 2006-12-3, 12:26(-05), Chris F.A. Johnson:
> [...]
>
>> Or parameter expansion:
>>
>>dev='parent = "ide0"'
>>dev=${dev#*\"}
>>dev=${dev%\"*}
>
> [...]
>
> Or simply expr:
>
> dev=$(
> expr "$dev" : 'parent = "\(.*\)"'
> )

Is there any shell where 'expr' is builtin?
To avoid the averhead of the two processes.

Janis

>
> zsh specific:
>
> dev=${dev/(#b)parent = \"(*)\"/$match[1]}
>
> Or:
>
> if [[ $dev = 'parent = "'(*)'"' ]]; then
> dev=$match[1]
> fi
>

On 2006-12-03, Stephane CHAZELAS wrote:
> 2006-12-3, 12:26(-05), Chris F.A. Johnson:
> [...]
>> Or parameter expansion:
>>
>> dev='parent = "ide0"'
>> dev=${dev#*\"}
>> dev=${dev%\"*}
> [...]
>
> Or simply expr:

s/simply/slowly/

> dev=$(
> expr "$dev" : 'parent = "\(.*\)"'
> )
>
> zsh specific:
>
> dev=${dev/(#b)parent = \"(*)\"/$match[1]}
>
> Or:
>
> if [[ $dev = 'parent = "'(*)'"' ]]; then
> dev=$match[1]
> fi
>


--
Chris F.A. Johnson, author <http://cfaj.freeshell.org/shell>
Shell Scripting Recipes: A Problem-Solution Approach (2005, Apress)
===== My code in this post, if any, assumes the POSIX locale
===== and is released under the GNU General Public Licence

Janis Papanagnou wrote:

> Is there any shell where 'expr' is builtin?

Possibly none, if you want an almost identical implementation.
See also <slrndc7a9q.6ch.stephane.chazelas@spam.is.invalid> .
--

Polani <kshiraz12@hotmail.com> wrote:
> Guys!!
>
> I need some in removing double quotes from a command output.
> Actually , as a result of command , i am getting a device name
> surrounded by double quotes.
>
> Output something like that "
>
> parent = "ide0"
>
> but this device name varies in length so i wish to find any way to
> remove these double quotes and give me only ide0 or pci4 etc... that
> is no more double quotes...
>
> How can i so that ... please me
>
> Thanks and best regards
>
> Polani

sed 's,",,'

--
William Park <opengeometry@yahoo.ca>, Toronto, Canada
ThinFlash: Linux thin-client on USB key (flash) drive
http://home.eol.ca/~parkw/thinflash.html
BashDiff: Super Bash shell
http://freshmeat.net/projects/bashdiff/

Sven Mascheck wrote:
> Janis Papanagnou wrote:
>
>>Is there any shell where 'expr' is builtin?
>
> Possibly none, if you want an almost identical implementation.

No; it was a rhetorical question because calling expr in a subshell
(as suggested) is slow; it requires two unnecessary processes.

Janis

Polani wrote:
> parent = "ide0" => parent = ide0

Tr? Sed!? Awk!!? Perl!!!? *Sheesh!*

Columbus tried to find a passage to the West Indies by
going the wrong way around the world too....

I suggest:

set -- $the_string
echo $3

=Brian

bsh wrote:
> Polani wrote:
>
>>parent = "ide0" => parent = ide0
>
>
> Tr? Sed!? Awk!!? Perl!!!? *Sheesh!*
>
> Columbus tried to find a passage to the West Indies by
> going the wrong way around the world too....
>
> I suggest:
>
> set -- $the_string
> echo $3
>
> =Brian
>

$ the_string='parent = "ide0"'
$ set -- $the_string
$ echo $3
"ide0"

But the OP wanted to remove of double quotes from command output.

Janis

2006-12-05, 00:45(+01), Janis Papanagnou:
> Sven Mascheck wrote:
>> Janis Papanagnou wrote:
>>
>>>Is there any shell where 'expr' is builtin?
>>
>> Possibly none, if you want an almost identical implementation.
>
> No; it was a rhetorical question because calling expr in a subshell
> (as suggested) is slow; it requires two unnecessary processes.
[...]

AFAICS, only bash forks twice there. Most other shells (at least
ash, zsh, AT&T ksh and pdksh) fork only once.

But remember a shell is a tool to execute commands. It can't be
definitely wrong to call the expr command. If you've got more
that one substitution to do, you can use sed or awk instead.

--
Stéphane

On 2006-12-05, Stephane CHAZELAS wrote:
>
> But remember a shell is a tool to execute commands.

And it is much more than that. A POSIX shell is a complete
programming language, needing external command much less than the
Bourne shell.

> It can't be definitely wrong to call the expr command.

It's not wrong, but it is very inefficient.

> If you've got more that one substitution to do, you can use sed or
> awk instead.

If you know there are only a few, using a shell loop will still be
faster than an external command.

--
Chris F.A. Johnson, author <http://cfaj.freeshell.org/shell>
Shell Scripting Recipes: A Problem-Solution Approach (2005, Apress)
===== My code in this post, if any, assumes the POSIX locale
===== and is released under the GNU General Public Licence

On 2006-12-05, Janis Papanagnou wrote:
> bsh wrote:
>> Polani wrote:
>>
>>>parent = "ide0" => parent = ide0
>>
>>
>> Tr? Sed!? Awk!!? Perl!!!? *Sheesh!*
>>
>> Columbus tried to find a passage to the West Indies by
>> going the wrong way around the world too....
>>
>> I suggest:
>>
>> set -- $the_string
>> echo $3
>>
>> =Brian
>>
>
> $ the_string='parent = "ide0"'
> $ set -- $the_string
> $ echo $3
> "ide0"
>
> But the OP wanted to remove of double quotes from command output.

eval "echo $3"

--
Chris F.A. Johnson, author <http://cfaj.freeshell.org/shell>
Shell Scripting Recipes: A Problem-Solution Approach (2005, Apress)
===== My code in this post, if any, assumes the POSIX locale
===== and is released under the GNU General Public Licence

Chris F.A. Johnson wrote:
> Janis Papanagnou wrote:
> > bsh wrote:
> > > Polani wrote:
> > ...
> eval "echo $3"

Darn it! Yes, I meant to add the "eval". Thank you
for the correction, Chris.

=Brian