In article <[email protected]>,
Nico Schottelius <[email protected]> wrote:
>Currently I do not open /dev/console in cinit, but currently
>I do see very strange behaviour:
>
>If the first printf() in the following code (from serv/cinit.c) is
>enabled, the socket communication will later fail:
printf() prints to stdout i.e. filedescriptor #1. If you do not
open stdin/stdout/stderr in your program, you do not know what
is going to be fd #1 later on .. in your case, the socket probably
is fd #1 and the printf() is happily printing to it.
To prevent this, do something like this at the start of your program:
int n;
do {
n = open("/dev/null", O_RDWR);
} while (n >= 0 && n <= 2);
close(n);
Mike.
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