Replace null char in variable

[mrn]

How can I replace a null value within a variable?

I know the var has a value set using

if [ -z $ver ] ; then

 if [ $(ver+EMPTY} = EMPTY] ; then
  echo "var empty"
 else
  echo "var not set"
 fi
else
 echo "var has value"
fi

but if I echo $ver > file

the file appears empty.

Ideas?

Mike

"Whenever I dwell for any length of time on my own shortcomings, they gradually begin to seem mild, harmless, rather engaging little things, not at all like the staring defects in other people's characters."

 

[PHV]

: ${ver:=Default}

Hope This Helps, PH.
FAQ219-2884
FAQ181-2886

 

[mrn]

Thanks PHV, but it's not empty so ver always has a value even if you can't see it.

Mike

"Whenever I dwell for any length of time on my own shortcomings, they gradually begin to seem mild, harmless, rather engaging little things, not at all like the staring defects in other people's characters."

 

[PHV]

So, what about CLEARLY explain the issue ?

 

[mrn]

I already said in my original post I know the var has a value.






Mike

"Whenever I dwell for any length of time on my own shortcomings, they gradually begin to seem mild, harmless, rather engaging little things, not at all like the staring defects in other people's characters."

 

[Chapter11]

if test "${VER}COFFEE" = "COFFEE"
then
VER="SOMETHINGELSE"
fi

 

[Chapter11]

Also, if you echo $ver out to a file, do a cat -v on that file, that might give you some insight as to what this hidden value might be, and therefore you might be able to strip it with tr -d.

Bet you a wooden nickel it's a carriage return =)

 

[PHV]

What are the result of the following commands ?
echo "$ver" | od
echo "$ver" > file && ls -l file
echo $ver > file && ls -l file

Hope This Helps, PH.
FAQ219-2884
FAQ181-2886

 

[mrn]

Thanks for you help on this guys,

I've found the problem, as in most cases, it was the keyboard / chair interface.

Thanks for your time.

Mike

"Whenever I dwell for any length of time on my own shortcomings, they gradually begin to seem mild, harmless, rather engaging little things, not at all like the staring defects in other people's characters."