On 13 March 2013 18:23, <[email protected]> wrote:
> Hi!
>> The problem is that for arches that don't have SYS_getdents defined,
>> you will not be able to compile LTP on them so you really need to
>> hide this codepath from them.
>>
>> A similar commit that changes the codepath based on whether a
>> particular __NR_XX is defined is this
>> https://github.com/linux-test-project/ltp/commit/75201f160b9aa49af70d8f46fb1f087e63d603dd
>>
>> I don't see an easy way to determine if __NR_XX is defined or not
>> during runtime.
>
> There is code that tries to address this issue in
> testcases/kernel/include/linux_syscall_numbers.h
> which defines macro ltp_syscall() that turns undefined
> syscall numbers into ENOSYS.
>
> The idea is to:
>
> 1) include sys/syscall.h to get the definitions system definitons
>
> 2) if your system headers are older (i.e. particular __NR_xxx is not defined)
> definitions from arch.in files are used
>
> 3) if __NR_xxx is not defined, there are stubs at the end of the header
> that defines the __NR_xxx to 0 which is then used by the ltp_syscall()
> macro to return -1 and set errno to ENOSYS
>
> --
> Cyril Hrubis
> [email protected]
Hi Cyril,
Ok thanks. So if this is how you want to solve this situation, I guess
it is possible to do what Jan proposed earlier. Use a new parameter
(say "-l" for "long", or pick another one), then define a new
getdents64 in getdents.h similar to the existing getdents one. The
only difference would be that we will use the "struct dirent64" and
"struct linux_dirent64". Finally use ltp_syscall() to call the
SYS_getdents{,64} syscalls instead of syscall().
If you agree with that I will create a new patch.
--
Regards,
Markos Chandras
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