I really do not see the relation between backquotes and the banner of gnuradio !?
May be you can try specifying full path to you binaries (example /bin/date /usr/bin/tail)?
Have you used the proper shebang (#!/bin/bash)?
You can also try #!/bin/sh, I have not seen command specific to bash.
Thank-you for ENABLE_IQ…
Do you think you can try changing in the file “observer/observer.py” the line
os.system(self._post_exec_script)
to
subprocess.call(self._post_exec_script, shell=True)
os.system is supposed to be deprecated.
I am not sure it can be the problem but call to systems
are supposed to be changed to subprocess.call now.
Worth a try.
If it does not work better, try with shell=False too.
Hi,
now I have tried all suggestions, but no success, the problem is exactly the same.
Can you try the following please:
Start python and import osmosdr.
This outputs the line:
linux;GNU C++ version 6.2.0 20161010; Boost_106100; UHD_003.009.005-0-unknown
on my SatNOGS RasPi on stdout.
I don’t know how this message “tunnels” into my script.
Alex
Hi,
I have the same as you have when importing osmosdr, but I really do not known
how it can filter to your script.
If you repeat
echo “Hello world”|tail -n1 >>test.log
twice, do you have twice the same result (only one trailing line?)
If not, you have your work-around.
Sorry, doesn’t work, for each command in the script, i am getting the “linux;GNU…”-thing.
Maybe because the user satnogs has no login-shell (only /bin/false),
STDOUT/IN/ERR are connected to the executed script.
Probably this could easily be solved, only need to know how… 
Sorry for you,
chsh satnogs
will do no harm then
Doesn’t work either.
FILE=`exec -c /bin/sh -c "date +%Y%m%d%H%M%S.dat"`
does the trick.
Thank you for your support!