Re: [Discuss-gnuradio] GRC [Errno 13] Permission denied for No GUI graphs

[Cinaed Simson]

On 07/06/2017 04:54 PM, Jozef Lošonský wrote:
> OK, again, python script is successfully created/written, and it is
> runnable outside of GRC, the errno13 comes from execve call which is
> incomplete, can you see that, please?

Send the flowchart and the python code if you want help.

-- Cinaed

> 
> On Jul 7, 2017 01:27, "Cinaed Simson" <address@hidden
> <mailto:address@hidden>> wrote:
> 
>     On 07/06/2017 02:57 PM, Jozef Lošonský wrote:
>     > I'm not behind my pc, but I think that it is possible to understand my
>     > issue, that py file is generated from any flowgraph OK, but "play
>     > button" press fails with Errno13 when "No GUI" (of course I'm not
>     using
>     > any WX or QT block in such case).
> 
>     Without at least an error message, e.g., Errno13, it's impossible to
>     figure out what the problem is since your explanations make no sense.
> 
>     In fact, you've never indicated there was an error message.
> 
>     Typically, an Errno13 is a write permission problem - it's not a
>     gnuradio or grc problem.
> 
>     And the error should have included
> 
>       Generate Error: [Errno 13] Permission denied:
> 
>     and then it prints out the location of where you're writing to.
> 
>     The obvious solution is to find another play to write the file.
> 
>     -- Cinaed
> 
> 
>     >
>     > On Jul 6, 2017 11:48 PM, "Cinaed Simson" <address@hidden
>     <mailto:address@hidden>
>     > <mailto:address@hidden <mailto:address@hidden>>>
>     wrote:
>     >
>     >     On 07/06/2017 02:14 PM, Jozef Lošonský wrote:
>     >     > Hi, there are no GUI elements and graf generated py file works
>     >     fine from
>     >     > console, but GRC only is unable to execute that already
>     generated
>     >     file.
>     >
>     >     Then post the flowgraph and the python code - it's the only
>     way we can
>     >     help you.
>     >
>     >     -- Cinaed
>     >
>     >     >
>     >     > On Jul 6, 2017 11:08 PM, "Cinaed Simson"
>     <address@hidden <mailto:address@hidden>
>     >     <mailto:address@hidden <mailto:address@hidden>>
>     >     > <mailto:address@hidden
>     <mailto:address@hidden> <mailto:address@hidden
>     <mailto:address@hidden>>>>
>     >     wrote:
>     >     >
>     >     >     On 07/06/2017 12:10 AM, Jozef Lošonský wrote:
>     >     >     > Hello,
>     >     >     > my GRC is unable to execute graphs (no GUI elements)
>     when I
>     >     switch
>     >     >     > option to No GUI, everything else seems to be working.
>     >     >
>     >     >     The option "No GUI" means no GUI elements, i.e., no graphs.
>     >     >
>     >     >     If you had a graphical element in your flowgraph, GRC
>     should have
>     >     >     complained and printed an error message in the GRC console
>     >     when you
>     >     >     clicked on the button "Generate the flow graph".
>     >     >
>     >     >     In order to generate python code from GRC you have
>     disable the GUI
>     >     >     elements in the flowgraph in order to generate python code.
>     >     >
>     >     >     > In addition "No
>     >     >     > GUI" py script (generated by same GRC) is running fine in
>     >     console
>     >     >     of the
>     >     >     > same user which is running GRC what is interesting.
>     >     >
>     >     >     I didn't find other
>     >     >     > way how to try get more info about issue than run
>     whole GRC
>     >     under
>     >     >     strace
>     >     >     > -ffy and read the strace file.
>     >     >     > Comparing strace files with working GRC instance on
>     another PC
>     >     >     @jcorgan
>     >     >     > did suggest that in execve python is missing.
>     >     >
>     >     >     And most likely the gnuradio software and the required
>     >     software packages
>     >     >     needed to run gnuradio on PC @jcorgan are probably
>     missing too.
>     >     >
>     >     >     A working installation of python is one of the
>     perquisite to run
>     >     >     gnuradio.
>     >     >
>     >     >     >
>     >     >     > Bad:
>     >     >     > [pid  2704] execve("/usr/local/bin/", ["", "-e",
>     >     "/usr/bin/python",
>     >     >     > "-u", "/home/pi/top_block.py"]...= -1 EACCES
>     (Permission denied)
>     >     >     > Good:
>     >     >     > [pid 12112] execve("/usr/bin/python",
>     ["/usr/bin/python", "-u",
>     >     >     > "/home/loso/top_block.py"], [/* 75 vars */]
>     <unfinished ...>
>     >     >     >
>     >     >     > I'm trying to find which env variable or what option am I
>     >     missing/have
>     >     >     > wrongly configured in GRC config or somewhere else.
>     >     >     Based on the content of this post, everything on your
>     machine
>     >     is working
>     >     >     correctly.
>     >     >
>     >     >     If you can actually generate an error message using
>     gnuradio -
>     >     other
>     >     >     then enclosed operator errors - post the error message, the
>     >     flowgraph
>     >     >     and the python code.
>     >     >
>     >     >     >
>     >     >     > Thank you.
>     >     >     > Jozef
>     >     >     >
>     >     >     >
>     >     >     >
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