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Re: [PATCH 1/5] progress.c: replace signal() with sigaction()

From
David Kastrup <dak@gnu.org>
Date
May 28, 2014, 08:19 UTC
Message-ID
<87sinuiad2.fsf@fencepost.gnu.org>
In-Reply-To
<5385994A.5040507@gmail.com>
Chris Packham <judge.packham@gmail.com> writes:
Show 36 quoted lines
> On 28/05/14 18:14, Jeremiah Mahler wrote:
>> From signal(2)
>> 
>>   The behavior of signal() varies across UNIX versions, and has also var‐
>>   ied historically across different versions of Linux.   Avoid  its  use:
>>   use sigaction(2) instead.  See Portability below.
>
> Minor nit. The last sentence applies to the man page you're quoting and
> doesn't really make sense when viewed in the context of this commit
> message. Same applies to other patches in this series.
>
>> 
>> Replaced signal() with sigaction() in progress.c
>> 
>> Signed-off-by: Jeremiah Mahler <jmmahler@gmail.com>
>> ---
>>  progress.c | 6 +++++-
>>  1 file changed, 5 insertions(+), 1 deletion(-)
>> 
>> diff --git a/progress.c b/progress.c
>> index 261314e..24df263 100644
>> --- a/progress.c
>> +++ b/progress.c
>> @@ -66,8 +66,12 @@ static void set_progress_signal(void)
>>  static void clear_progress_signal(void)
>>  {
>>  	struct itimerval v = {{0,},};
>> +	struct sigaction sa;
>> +
>> +	memset(&sa, 0, sizeof(sa));
>> +	sa.sa_handler = SIG_IGN;
>
> A C99 initialiser here would save the call to memset. Unfortunately
> Documentation/CodingGuidelines is fairly clear on not using C99
> initialisers, given the fact we're now at git 2.0 maybe it's time to
> revisit this policy?

If I look at the initialization of v in the context immediately above the new code, it would appear that somebody already revisited this policy.

-- 
David Kastrup
Previous: Chris PackhamNext: Erik Faye-Lund
Message 4 of 16 in “replace signal() with sigaction()”
  1. 0/5 replace signal() with sigaction()Jeremiah Mahler, May 28, 2014
  2. 1/5 progress.c: replace signal() with sigaction()Jeremiah Mahler, May 28, 2014
  3. Chris PackhamMay 28, 2014
  4. David KastrupMay 28, 2014
  5. Erik Faye-LundMay 28, 2014
  6. David KastrupMay 28, 2014
  7. Junio C HamanoMay 28, 2014
  8. Jeremiah MahlerMay 28, 2014
  9. 2/5 daemon.c run_service(): replace signal() with sigaction()Jeremiah Mahler, May 28, 2014
  10. 3/5 daemon.c child_handler(): replace signal() with sigaction()Jeremiah Mahler, May 28, 2014
  11. 4/5 daemon.c service_loop(): replace signal() with sigaction()Jeremiah Mahler, May 28, 2014
  12. 5/5 connect.c: replace signal() with sigaction()Jeremiah Mahler, May 28, 2014
  13. Johannes SixtMay 28, 2014
  14. Chris PackhamMay 28, 2014
  15. Erik Faye-LundMay 28, 2014
  16. Jeremiah MahlerMay 28, 2014

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