[Click] #include <unistd.h> header in kernel ?

[ndritsos]

hello ,

iam trying to port code from openssl , especially
at this time i need the function Rand_poll()
https://github.com/openssl/openssl/blob/master/crypto/rand/rand_unix.c
lines 237 - 420

The function Rand_poll use
1)getpid()
2)close(..)
3)open(...)
4getuid()

and all this functions are defined on unistd.h !

any idea someone how i can run  this code on kernel level?


On 08/26/2013 02:23 AM, Cliff Frey wrote:
> You cannot use unistd.h (or any other standard userlevel headers) in 
> the kernel.  Whatever you are trying to do must be done in a different 
> way.  Specifically you cannot use getpid().
>
> What do you want/need getpid for?
>
> Cliff
>
>
> On Sun, Aug 25, 2013 at 1:35 PM, ndritsos <ndritsos at gmail.com 
> <mailto:ndritsos at gmail.com>> wrote:
>
>     Hello everyone ,
>
>     i have created an element that uses  the library unistd.h,  and in the
>     user level it works fine .
>     Now i'm working in kernel level , and it doesn't work.
>
>     in kernel level i have imported :
>
>     #include <linux/unistd.h>
>
>     and i have this  compile time error:
>     ---
>     In file included from
>     /home/dritsos/click/linuxmodule/../elements/local/ndritso.cc:23:0:
>     /home/dritsos/click/include/click-linuxmodule/include2/linux/unistd.h:5:3:
>     error: #error "missing #include <click/cxxprotect.h>"
>     In file included from
>     /home/dritsos/click/include/click-linuxmodule/include2/linux/unistd.h:12:0,
>                       from
>     /home/dritsos/click/linuxmodule/../elements/local/ndritso.cc:23:
>     /home/dritsos/click/include/click-linuxmodule/include0/asm/unistd.h:4:3:
>     error: #error "missing #include <click/cxxprotect.h>"
>     In file included from
>     /home/dritsos/click/include/click-linuxmodule/include0/asm/unistd.h:8:0,
>                       from
>     /home/dritsos/click/include/click-linuxmodule/include2/linux/unistd.h:12,
>     from /home/dritsos/click/linuxmodule/../elements/local/ndritso.cc:23:
>     /home/dritsos/click/include/click-linuxmodule/include0/asm/unistd_32.h:5:3:
>     error: #error "missing #include <click/cxxprotect.h>"
>     /home/dritsos/click/linuxmodule/../elements/local/ndritso.cc: In
>     member
>     function 'virtual int NdritsoElement::initialize(ErrorHandler*)':
>     /home/dritsos/click/linuxmodule/../elements/local/ndritso.cc:59:8:
>     error: 'getpid' was not declared in this scope
>     make[3]: *** [/home/dritsos/click/linuxmodule/ndritso.o] Error 1
>     make[2]: *** [_module_/home/dritsos/click/linuxmodule] Error 2
>     make[2]: Leaving directory `/usr/src/linux-headers-3.0.0-12-generic'
>     make[1]: *** [all] Error 2
>     make[1]: Leaving directory `/home/dritsos/click/linuxmodule'
>     make: *** [install-linuxmodule] Error 2
>
>
>     ---
>
>
>     Any idea how i can fix this error??
>
>     thanks in advance
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