New submission from Jan Studený:
According to POSIX specification the pathname of user shell is stored in SHELL
(environmental variable, see
http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap08.html#tag_08)
so I think that is good idea to use that pathname instead of hardcoded one.
Change is only in one line of subprocess package to use SHELL environmental
variable and use hardcoded shell pathname as fallback.
lines 1431-1433
```
if shell:
args = ["/bin/sh", "-c"] + args
if executable:
```
to
```
if shell:
args = [os.environ.get("SHELL","/bin/sh"), "-c"] + args
if executable:
```
----------
components: Library (Lib)
messages: 249023
nosy: Jan Studený
priority: normal
severity: normal
status: open
title: Use user shell in subprocess
type: behavior
versions: Python 2.7, Python 3.2, Python 3.3, Python 3.4, Python 3.5
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<http://bugs.python.org/issue24919>
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