用printf以bash导出不起作用

Question

I exported:

export FMTSTR="%2\$n'printf "\xc0\xf2\x03\x42";'"

and I want to see the result:

env | grep FMTSTR
FMTSTR=%2$n'printf xc0xf2x03x42;'

but this is not what I want...The result must be :

‫‪FMTSTR=%2$nTB‬‬

Could you possibly tell me what the problem is? secondly can I use python instead of printf? like this:

export FMTSTR="%2\$n $(python -c 'print "\xc0\xf2\x03\x42"')"

when I use python the result is:

FMTSTR=%2$n ��B

why? please give me a help in these two questions.

thank you...

Answer 1

This is not exactly correct (due to the nature of your question), but I feel you may have better luck using this:

export FMTSTR=`python -c 'print "%2$n\xc0\xf2\x03\x42"'`

Now, the \\xc0\\xf2\\x03 has no ascii equivalent. I'm not sure how you're expecting the output TB.