Re: Modifying the environment variables of a parent process

[Gianfranco Costamagna <costamagnagianfranco@yahoo.it>]

Hi Markhazy,

first I guess this isn't the right place, but well, the damage is done :)




TLTR;
you have a cdiv code that gives in output two numbers, real and the imaginary part
you want to store them into bash variables.

so, why can't you do a simple bash script for doing this?

I see a trivial solution: get the return of the cvid program and store in a temp variable.

then split it.
user@user:-$ A=-1
user@user:-$ B=6
"cdiv $A 5 $B 0"
-0.16667 + j0.8333

so I would do something like

TEMP=`cdiv $A 5 $B 0`

or
TEMP=$(cdiv $A 5 $B 0)

note the special "`" character

AC=$(echo $TEMP  | cut -d "+" -f 1)
ACIM=$(echo $TEMP  | cut -d "+" -f 2)

if you want to strip the j
ACIM=$(echo $TEMP  | cut -d "+" -f 2 | cut -d "j" -f 2)

man cut
man echo

can help you :)

(of course this is a bad solution, a nicer solution might be to save the output in a file and parte is,
directly use some bash command to calculate that, e.g. some bc scripting [1] or even make your cdiv communicate with sockets, dbus or just by printing
output on more lines, to avoid the need to parse the output with bash)


[1] http://phodd.net/gnu-bc/code/complex.bc

HTH, even if I'm not sure I understood the question.

cheers,

G.