regd. sending null bytes over a system command

[python1]

Hi All,

I am using a python system command to execute a C++ executable file which takes certain binary input.

For example:
C++ exe name is "Test"
"Test" takes the following input . '\x02\xfa\xcbQH\x00'
command = '/opt/etc/Test %s' % ('\x02\xfa\xcbQH\x00')
system command I am using is : os.popen(command)

When this command is executed I get an error message: "TypeError: 'popen() argument 1 must be string without null bytes, not 'str'"

Is there some way I can execute this using system command without getting the above error

Thanks

[jlm699]

A way around this would be to write a temporary .sh file with the commands that you would like, and execute the file as such:

f = open( 'testScript.sh' )
f.write( '/opt/etc/Test \x02\xfa\xcbQH\x00\n' )
f.close()
 
os.system( 'chmod 755 ./testScript.sh' )
cmdReturn = os.popen( './testScript.sh' )
 

Then just check the cmdReturn for success or fail information? This is kind of a work around but there are many options for you.