[Python-Dev] subprocess shell=True on Windows doesn't escape ^ character (original) (raw)

Ryan rymg19 at gmail.com
Wed Jun 11 23:58:30 CEST 2014

Of course! And, why not escape everything else, too?

abc -> ^a^b^c

echo %PATH% -> ^e^c^h^o^ ^%^P^A^T^H^%

In all seriousness, to me this is obvious. When you pass a command to the shell, naturally, certain details are shell-specific.

-10000. Bad idea. Very bad idea. If you want the ^ to be escaped, do it yourself. Or better yet, don't pass shell=True.

anatoly techtonik <techtonik at gmail.com> wrote:

I am banned from tracker, so I post the bug here:

Normal Windows behavior: >hg status --rev ".^1" M mercurial\commands.py ? pysptest.py >hg status --rev .^1 abort: unknown revision '.1'! So, ^ is an escape character. See http://www.tomshardware.co.uk/forum/35565-45-when-special-command-line

But subprocess doesn't escape it, making cross-platform command fail on Windows. ---[cut pysptest.py]-- import subprocess as sp # this fails with # abort: unknown revision '.1'! cmd = ['hg', 'status', '--rev', '.^1'] # this works #cmd = 'hg status --rev ".^1"' # this works too #cmd = ['hg', 'status', '--rev', '.^^1'] try: print sp.checkoutput(cmd, stderr=sp.STDOUT, shell=True) except Exception as e: print e.output ------------------------------ -- anatoly t. ------------------------------------------------------------------------

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