Oh, by the way, maybe you, instead, simply would want to run your whole
flowgraph using `nohup`, or simply in a `screen` or `tmux` session :)
On 07/12/2017 09:22 AM, Marcus Müller wrote:
>
> If you can, update to the most current UHD – we've worked on the
> logging infrastructure, and you can simply disable that.
>
> This will probably require building both UHD, and as soon as you've
> done that, GNU Radio from source.
>
> Best regards,
> Marcus
>
> On 07/11/2017 10:39 PM, devin kelly wrote:
>> Hello,
>>
>> I have a flowgraph that I made with GRC and modified. All I want to
>> do with the flowgraph is make it run as a daemon. I understand that
>> if there are overflows or underflows I'll miss them, that's OK.
>>
>> I added some basic python code to daemonize my flowgraph:
>>
>>
>> # Fork once
>> try:
>> pid = os.fork()
>> except OSError:
>> print 'error forking'
>>
>> if pid > 0: # if parent, return
>> return
>>
>> os.umask(0)
>>
>> # Reset the session ID
>> try:
>> os.setsid()
>> except OSError:
>> sys.exit(1)
>>
>> # Fork twice, giving up ownership of first parent's SID
>> try:
>> pid = os.fork()
>> except OSError:
>> print 'error forking'
>>
>> if pid != 0: # if parent, return
>> sys.exit(0)
>>
>> # Change PWD
>> try:
>> os.chdir('/')
>> except OSError:
>> return
>>
>> # Close open files
>> sys.stdin.close()
>> sys.stdout.close()
>> sys.stderr.close()
>>
>> with open('/dev/null', 'r+') as devnull:
>> sys.stdin = devnull
>> sys.stdout = devnull
>> sys.stderr = devnull
>>
>> tb = top_block_cls(options)
>> tb.start()
>> time.sleep(60.0)
>> tb.stop()
>> tb.wait()
>>
>> When I run this, it works at first (I get my prompt back, you can see
>> me trying to open the file). But then the UHD hijacks my
>> stdout/stderr and resumes as if nothing happened.
>>
>> $ ./flowgraph.py -t
>> 30
>>
>>
>> linux; GNU C++ version 4.8.4; Boost_105500; UHD_003.009.005-0-g32951af2
>>
>> $ vim flowgraph.py -- X300 initialization
>> sequence...
>>
>> -- Determining maximum frame size... 1472 bytes.
>> -- Setup basic communication...
>> -- Loading values from EEPROM...
>> -- Setup RF frontend clocking...
>> -- Radio 1x clock:200
>> -- Initialize Radio0 control...
>> -- Performing register loopback test... pass
>> -- Initialize Radio1 control...
>> -- Performing register loopback test... pass
>>
>> How do I stop the UHD from doing this?
>>
>> Thanks for any help,
>> Devin
>>
>>
>> _______________________________________________
>> Discuss-gnuradio mailing list
>> Discuss-gnuradio@gnu.org
>> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>
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