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Old 05-10-2011, 01:33 AM   #1
atomicdog
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Registered: May 2009
Location: San Diego
Distribution: Ubuntu
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bash variable as parameter to script


Hi,

I want to create a variable that when passed as a parameter to another bash script will keep its string quotes (so it stays as one parameter). What ways can I achieve this cleanly? I found one way of doing it but it doesn't look like an optimal choice to me.

Thanks, John

Code:
john@ubuntu:/usr/local/src$ cat foo.sh 
#!/bin/bash

echo $0
echo $1
echo $2
john@ubuntu:/usr/local/src$ cat build-foo-test.sh 
#!/bin/bash
TOP=pwd
GCC_IGNORE="'boehm-gc gnattools libada libffi libgfortran libgomp libjava libobjc libssp .svn'"

# This works...
./foo.sh ../gcc-4.5 "`echo ${GCC_IGNORE}`"

# I would like it to look like this though...
./foo.sh ../gcc-4.5 $GCC_IGNORE
Code:
john@ubuntu:/usr/local/src$ . build-foo-test.sh 
./foo.sh
../gcc-4.5
'boehm-gc gnattools libada libffi libgfortran libgomp libjava libobjc libssp .svn'
./foo.sh
../gcc-4.5
'boehm-gc
john@ubuntu:/usr/local/src$
Code:
john@ubuntu:/usr/local/src$ uname --all
Linux ubuntu 2.6.32-30-generic #59-Ubuntu SMP Tue Mar 1 21:30:46 UTC 2011 x86_64 GNU/Linux
john@ubuntu:/usr/local/src$ bash --version
GNU bash, version 4.1.5(1)-release (x86_64-pc-linux-gnu)
Copyright (C) 2009 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>

This is free software; you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
john@ubuntu:/usr/local/src$
 
Old 05-10-2011, 02:26 AM   #2
brownie_cookie
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maybe put the echo in the variable GCC_IGNORE ?
 
Old 05-14-2011, 02:40 PM   #3
atomicdog
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Location: San Diego
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Hi,

Thanks for the reply. I just tried your suggestion again but it still doesn't seem to work.
 
Old 05-14-2011, 05:24 PM   #4
r3sistance
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I'd suggest looking into escape characters maybe?

so using \' and again another \'...

as an example the following code shows how this can be used to get different outputs

Code:
#!/bin/bash
MYSTRING="hello, keep me quoted"
MYFIRSTFUNC="echo \"$MYSTRING\""
MYSECONDFUNC="echo $MYSTRING"
echo "value of first func: $MYFIRSTFUNC"
$MYFIRSTFUNC
echo "value of second func: $MYSECONDFUNC"
$MYSECONDFUNC
This will output as follows


value of first func: echo "hello, keep me quoted"
"hello, keep me quoted"
value of second func: echo hello, keep me quoted
hello, keep me quoted

as you can see, the first func keeps the value quoted.

Last edited by r3sistance; 05-14-2011 at 05:44 PM.
 
Old 05-14-2011, 09:50 PM   #5
grail
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I am not sure I understand the issue??
Code:
#!/bin/bash

m2f()
{
    echo "$1"
}

myf()
{
    echo "$1"
    m2f "$1"
}

x="'hello this is quoted'"

echo "$x"

myf "$x"
As long as x is passed quoted it retains the internal quotes. Would someone explain if we are talking about something else?
 
1 members found this post helpful.
Old 05-15-2011, 01:19 PM   #6
astromime
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maybe try using an array?
 
Old 05-16-2011, 01:04 AM   #7
atomicdog
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Registered: May 2009
Location: San Diego
Distribution: Ubuntu
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Quote:
Originally Posted by r3sistance View Post
I'd suggest looking into escape characters maybe?
...
This will output as follows

value of first func: echo "hello, keep me quoted"
"hello, keep me quoted"
value of second func: echo hello, keep me quoted
hello, keep me quoted

as you can see, the first func keeps the value quoted.
It doesn't work as a parameter to another script for some reason.

Code:
john@ubuntu:/usr/local/src$ cat r3sistance 
#!/bin/bash

LIST="boehm-gc gnattools libada libffi libgfortran libgomp libjava libobjc libssp .svn"

GCC_IGNORE="echo \"$LIST\""

./foo.sh ../gcc-4.5 $GCC_IGNORE

$GCC_IGNORE

john@ubuntu:/usr/local/src$ . r3sistance 
./foo.sh
../gcc-4.5
echo
"boehm-gc gnattools libada libffi libgfortran libgomp libjava libobjc libssp .svn"
 
Old 05-16-2011, 01:42 AM   #8
atomicdog
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Registered: May 2009
Location: San Diego
Distribution: Ubuntu
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Original Poster
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Quote:
Originally Posted by grail View Post
...
Code:
x="'hello this is quoted'"

echo "$x"

myf "$x"
As long as x is passed quoted it retains the internal quotes. Would someone explain if we are talking about something else?
Yeah this is what I wanted, Thanks.
I thought I tried that already.
I think I got so frustrated trying different things that I wasn't keeping track of exactly what I tried already. I probable tried passing it with the quotes but the variable had only single/double quote(which doesn't work) instead of having the double quotes wrapping the single quotes.
 
Old 05-16-2011, 03:49 AM   #9
grail
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You can use the quotes in either direction, ie. "'blah'" or '"blah"', but of course the second will not expand variables, although some times this
can be the desired affect
 
1 members found this post helpful.
  


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