[Tutor] How to run multiline shell command within python
msarro at gmail.com
Thu Jan 10 16:21:53 CET 2013
Have you looked a the pexpect class? It works like gangbusters, especially
if you're trying to run something with an interactive shell.
On Thu, Jan 10, 2013 at 9:25 AM, Karim <kliateni at gmail.com> wrote:
> On 10/01/2013 09:31, Hugo Arts wrote:
> On Thu, Jan 10, 2013 at 7:01 AM, Karim <kliateni at gmail.com> wrote:
>> Hello all,
>> I want to run multiline shell command within python without using a
>> command file but directly execute several lines of shell.
>> I already use *subprocess.checkoutput("csh -f my_file.csh".split())* but
>> I want to know if it is posssible to avoid making file and execute
>> shell lines of code directly.
> Yes, this is very possible. Specify shell=True as an argument and you
> can do anything you can do in a shell:
> >>> commands = """echo hello
> ... echo hello | wc -l
> ... ps aux | grep python"""
> >>> b = subprocess.check_output(commands, shell=True)
> >>> print(b.decode('ascii'))
> hugo 1255 1.0 0.6 777316 49924 ? Sl 09:14 0:08
> /usr/bin/python2 /usr/bi
> hugo 6529 0.0 0.0 42408 7196 pts/0 S+ 09:23 0:00 python
> hugo 6559 0.0 0.0 10656 1128 pts/0 S+ 09:28 0:00 grep
> watch out though, accepting user input into the commands variable will
> lead to shell injection, which can be a dangerous security vulnerability.
> Many thanks Hugo. It makes my day!
> In my case there are no possibilities for shell injection. It is internal
> to a class.
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