From: "Dave Barter" <[EMAIL PROTECTED]>
dave> I would like to modify the openssl genrsa program to "quietly" generate
dave> keys, ie. Not print the '.' and '+' characters to STDOUT when generation
dave> occurs. Basically I would like to add the flag -quiet to the genrsa
dave> command line.
A very quick solution is to redirect stdout to /dev/null or something
corresponding.
dave> I have had a brief glance at the code to try and ascertaint the best way
dave> to do this, and notice that in genrsa.c for example all output to the
dave> screen goes through a function called BIO_printf(). I was considering
dave> modifying this function to suppress output if the -quiet flag was
dave> present.
Why on earth would you want to change BIO_printf(), and how would it
know that the application parsed a -quiet? A global variable?
The right way would be to change genrsa to only print to stdout when
-quiet hasn't been given.
dave> Could somebody on the list give me a brief summary of the BIO_printf
dave> function and also advise whether there would be a better method to
dave> achieve my aim.
It's supposed to be a replacement of fprintf and friends, but takes a
BIO* instead of a FILE*.
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