[OT] Evaluate strings in bash

Oliver Fromme olli at lurza.secnetix.de
Thu Aug 21 10:39:54 UTC 2008


Matias Surdi wrote:
 > Oliver Fromme escribió:
 > > Matias Surdi wrote:
 > > > Oliver Fromme escribió:
 > > > > Matias Surdi wrote:
 > > > > > # echo $BINMAKE
 > > > > > `if [ -x /usr/obj/usr/src/make.i386/make ]; then echo 
 > > > > > /usr/obj/usr/src/make.i386/make; else echo make; fi` -m /usr/src/share/mk
 > > > > > 
 > > > > > I'd like to have a second variable like:
 > > > > > [code]
 > > > > > # echo $newvariable
 > > > > > make -m /usr/src/share/mk
 > > > > 
 > > > > # newvariable=`eval echo $BINMAKE`
 > > > 
 > > > I've already tried that, but doesn't work.
 > > 
 > > It does work.  Maybe you forgot the "echo" part?
 > 
 > Maybe I've not explained it very well, look here: 
 > http://www.linuxquestions.org/questions/linux-general-1/bash-strings-evaluation-664094/

You have explained it well enough, I think, and the
solution I explained above works fine.  If it doesn't
work for you, then you did it wrong.  The solution
written at the URL you mentioned is unnecessarily
complicated.

$ echo $BINMAKE
`if [ -x /usr/obj/usr/src/make.i386/make ]; then echo /usr/obj/usr/src/make.i386/make; else echo make; fi` -m /usr/src/share/mk
$ newvariable=`eval echo $BINMAKE`
$ echo $newvariable
make -m /usr/src/share/mk
$ 

Best regards
   Oliver

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