Scott is correct. The errors are handled properly in s3cmd and sent to the
stderr stream (device). So you can pipe the stdout stream to /dev/null and
still see errors on the console (or send them to your destination of
choice--a log or database or email).
On Wed, Dec 19, 2012 at 9:58 AM, Scott Jacobsen <sc...@neighborland.com>wrote:
> Assuming s3cmd handles errors correctly error messages will be sent to
> stderror and it will exit with a non zero exit status. I would test that
> that is the case and use the exit status to check for errors, direct stdout
> to /dev/null and capture stderr to your log.
>
> Most often for a properly written command line tool the way to do what you
> want is to direct stdout to null, capture stderr, and check the exit
> status.
> On Dec 19, 2012 1:28 AM, "John Birchman" <johnr...@gmail.com> wrote:
>
>> Andi and others:
>>
>> With other command line tools, there is usually a "warnings only"
>> switch, in which the output is suppressed when things are normal, but if
>> a problem occurs, then it will respond with the problem.
>>
>> For example, ffmpeg has the -loglevel switch, which can be set to
>> 'quiet' 'warning' 'verbose' etc. based on the amount of output you want
>> returned, if any.
>>
>> Yes, I can send the responses to null, but then I would never know if
>> there was a problem. I could look at the responses, and add a
>> conditional for a warning alert, but I do not know all of the possible
>> warning responses from s3cmd. Like I said, most command line tools
>> already have a warnings only switch for this reason.
>>
>> I guess I am going to give on on using s3cmd for now, since there does
>> not seem to be a warnings only option, which is unfortunate, as I like
>> many of the things it does over some of the other s3 tools. Perhaps the
>> author will add this option in the future.
>>
>> John
>>
>> On 12/14/2012 4:57 PM, Andi Everitt wrote:
>> > Hi John,
>> >
>> > I'm not sure exactly what you're asking. I don't use put routinely but I
>> > do use sync in a script to run in the middle of the night and there I
>> > catch the output to log files. If you don't want output can you just
>> > direct it to /dev/nul?
>> >
>> > Kind Regards,
>> > Andi
>> >
>> > On 12/12/2012 16:34, John Birchman wrote:
>> >> Hello:
>> >>
>> >> (sorry if this is a duplicate message - I have not revived any messages
>> >> from this list since I joined, including my first message that I should
>> >> have seen echoed back.)
>> >>
>> >> I am trying to use s3cmd from within perl using system.
>> >>
>> >> What is the switch to suppress the response dialog that comes back for
>> >> every put request?
>> >>
>> >> I have tried:
>> >>
>> >> --no-progress
>> >>
>> >> but that doesn't seem to change anything.
>> >>
>> >> Also I there is nothing to say exactly where to put it, though I tried
>> >> different places. Do you put it after the s3cmd? Or at the end?
>> >>
>> >> I would like to use this, but if I am going to have the script/cron
>> >> email me every minute to tell me that it uploaded the file correctly,
>> >> I'm not going to use it, because it is really annoying.
>> >>
>> >> I only want warning messages to be displayed, if everything worked ok,
>> I
>> >> want no response.
>> >>
>> >> Thanks for any help!
>> >>
>> >> John
>> >>
>> >>
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