[LTP] [PATCH v2 1/2] syscalls/pidfd_open01.c: Add check for close-on-exec flag

[Xiao Yang <yangx.jy@cn.fujitsu.com>]

On 2020/5/13 20:34, Cyril Hrubis wrote:
> Hi!
>> pidfd_open(2) will set close-on-exec flag on the file descriptor as it
>> manpage states, so check close-on-exec flag by fcntl(2).
>>
>> BTW:
>> I tried to pass (long) TST_RET to fcntl() but triggered the following
>> compiler warning, so pass (int) pidfd instead.
>> ------------------------------------------------------
>> In file included from pidfd_open01.c:9:
>> pidfd_open01.c: In function ???run???:
>> ../../../../include/tst_test.h:76:41: warning: format ???%i??? expects argument of type ???int???, but argument 5 has type ???long int??? [-Wformat=]
>>     76 |   tst_brk_(__FILE__, __LINE__, (ttype), (arg_fmt), ##__VA_ARGS__);\
>>        |                                         ^~~~~~~~~
>> ../../../../include/tst_safe_macros.h:224:5: note: in expansion of macro ???tst_brk???
>>    224 |     tst_brk(TBROK | TERRNO,                          \
>>        |     ^~~~~~~
>> pidfd_open01.c:20:9: note: in expansion of macro ???SAFE_FCNTL???
>>     20 |  flag = SAFE_FCNTL(TST_RET, F_GETFD);
>
> You can either cast the TST_RET to int as SAFE_FCNTL((int)TST_RET, ...)
> or if you decide to store the pidfd into an int variable there is no
> added value in using the TEST() macro here so the code should just do
> pidfd = pidfd_open(...) and use the pidfd instead of TST_RET.
Hi Cyril,

Thanks for your reply.
I also think it is OK to replace TEST() and TST_RET directly.

Thanks,
Xiao Yang
>