[docs] python2.7/subprocess.py Popen on Ubuntu 10.04 Bug

[Georg Brandl]

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Am 30.10.2013 14:59, schrieb Eyal Moscovici:
> Hi,
> 
> I found that using Popen with both executable and shell parameters set
> creates a bug:
> 
> For example:
> 
> Calling:
> 
> Popen(["-a"], exacutable="/bin/ls", shell=True)
> 
> Exacutes: /bin/ls -c -a instead of: /bin/sh -c "/bin/ls -a"
> 
> The bug in the function: def _execute_child(self, args, executable,
> preexec_fn, close_fds, cwd, env, universal_newlines, startupinfo,
> creationflags, shell, p2cread, p2cwrite, c2pread, c2pwrite, errread,
> errwrite): """Execute program (POSIX version)"""
> 
> Lines: 1124-1127:
> 
> if shell: args = ["/bin/sh", "-c"] + args if executable: args[0] =
> executable

Hi Eyal,

thanks for your report.  This is working as documented; if shell is true
the "executable" argument specifies a replacement for /bin/sh, not for the
command.

Also you'll always have to include an executable name in your args as well:

Popen('ls -a', shell=True)

cheers,
Georg
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