Commit graph

2853 commits

Author SHA1 Message Date
Jordan Borean
b936539ae1
powershell - fix nested CLIXML parser (#71412) (#71451)
(cherry picked from commit 8897d7e2ff)
2020-08-28 09:54:14 -07:00
Toshio Kuratomi
6b639f147d
[stable-2.10] Update ansible doc formats (#71070) (#71111)
* Fix tty_ify bugs and refactor

* Move tty_ify() and supporting attributes to the DocCLI class as that's
  the only thing using it.
* Add unittest for the code.
* Fix a bug where the substitution macros can be detected when they are
  a part of another word.
* Add support for L(), R(), and HORIZONTALLINE which were added to the
  website docs many years ago.

* Update test/units/cli/test_doc.py

Co-authored-by: Matt Clay <matt@mystile.com>

Co-authored-by: Matt Clay <matt@mystile.com>
(cherry picked from commit fb144c4)

Co-authored-by: Toshio Kuratomi <a.badger@gmail.com>
2020-08-27 13:33:24 -05:00
Rick Elrod
6e3271aa61
[stable-2.10] Revert default mode changes (#71260)
* Revert "[stable-2.10] Revert "Change default file permissions so they are not world readable (#70221) (#70824)" (#71236)"

This reverts commit c968020d52.

* Revert "Remove porting guide entry related to reverted change (#71242)"

This reverts commit 006a21eae2.
2020-08-13 12:17:47 -05:00
Sam Doran
c968020d52
[stable-2.10] Revert "Change default file permissions so they are not world readable (#70221) (#70824)" (#71236)
* [stable-2.10] Revert "Fix warning for new default permissions when mode is not specified (#70976) (#70985)"

This reverts commit 5cb96087e6.

* [stable-2.10] Revert "Change default file permissions so they are not world readable (#70221) (#70824)"

This reverts commit 7e4cffc5d2.
2020-08-12 14:30:47 -05:00
Sam Doran
719c40bfdf
[stable-2.10] facts - fix incorrect time for some date_time_facts (#70665) (#70996)
* [stable-2.10] facts - fix incorrect time for some date_time_facts (#70665)

The iso8601_micro and iso8601 facts incorrectly called now.utcnow(), resulting
in a new timestamp at the time it was called, not a conversion of the previously
stored timestamp.

Correct this by capturing the UTC timestamp once then calculating the local
time using the UTC offset of the current system.

* Use time.time() for getting the current time
* Convert from that stored epoch timestamp to local and UTC times
* Used existing timestamp for epoch time
* Add unit tests that validate the formate of the return value rather than an exact value since mocking time and timezone is non-trivial
(cherry picked from commit c4f442ed5a)

Co-authored-by: Sam Doran <sdoran@redhat.com>

* Remove tests for tz_dst since that only exists in newer versions
2020-07-30 13:37:19 -07:00
Brian Coca
9b992c0b78
reset logging to INFO (#70878) (#70881)
- due to CVE-2019-14846
 - also added comments and test to avoid 'oportunistic' reversion

(cherry picked from commit 1223ce656a)
2020-07-24 15:47:57 -05:00
Matt Davis
cc8d180801
fix internal cases of actions calling unqualified module names (#70818) (#70840)
* fix internal cases of actions calling unqualified module names

* add porting_guide entry
* misc other fixes around action/module resolution broken by redirection

ci_complete

* Update docs/docsite/rst/porting_guides/porting_guide_2.10.rst

Co-authored-by: Rick Elrod <rick@elrod.me>

* Update docs/docsite/rst/porting_guides/porting_guide_2.10.rst

Co-authored-by: Rick Elrod <rick@elrod.me>

* address review feedback

* pep8

* unit test fixes

* win fixes

* gather_facts fix module args ignores

* docs sanity

* pep8

* fix timeout test

* fix win name rewrites

Co-authored-by: Rick Elrod <rick@elrod.me>
(cherry picked from commit 4c0af6c808)
2020-07-23 10:29:09 -07:00
Sam Doran
7e4cffc5d2
[stable-2.10] Change default file permissions so they are not world readable (#70221) (#70824)
* Change default file permissions so they are not world readable

CVE-2020-1736

Set the default permissions for files we create with atomic_move() to 0o0660. Track
which files we create that did not exist and warn if the module supports 'mode'
and it was not specified and the module did not call set_mode_if_different(). This allows the user to take action and specify a mode rather than using the defaults.

A code audit is needed to find all instances of modules that call atomic_move()
but do not call set_mode_if_different(). The findings need to be documented in
a changelog since we are not warning. Warning in those instances would be frustrating
to the user since they have no way to change the module code.

- use a set for storing list of created files
- just check the argument spac and params rather than using another property
- improve the warning message to include the default permissions.
(cherry picked from commit 5260527c4a)

Co-authored-by: Sam Doran <sdoran@redhat.com>
2020-07-23 09:07:18 -07:00
David Shrewsbury
7cdba7c923
Sanitize URI module keys with no_log values (#70762) (#70820)
* Add sanitize_keys() to module_utils.

* More robust tests

* Revert 69653 change

* Allow list or dict

* fix pep8

* Sanitize lists within dict values

* words

* First pass at uri module

* Fix insane sanity tests

* fix integration tests

* Add changelog

* Remove unit test introduced in 69653

* Add ignore_keys param

* Sanitize all-the-things

* Ignore '_ansible*' keys

* cleanup

* Use module.no_log_values

* Avoid deep recursion issues by using deferred removal structure.

* Nit cleanups

* Add doc blurb

* spelling

* ci_complete

(cherry picked from commit bf98f031f3)
2020-07-22 18:28:24 -07:00
Matt Martz
7eb5f53294
[stable-2.10] Ensure single vaulted values aren't counted as sequences. Fixes #70784 (#70786) (#70791)
(cherry picked from commit 96b74d3)

Co-authored-by: Matt Martz <matt@sivel.net>
2020-07-22 18:25:38 -07:00
Sam Doran
9b8a649f2e
[stable-2.10] Handle Slackware OS version strings containing a plus (“+”) (#68142) (#70717)
A couple of years ago Slackware -current began using a plus (“+”) at the end of the distribution version string to indicate a future version work-in-progress.

Rearrange distribution_files unit tests to easily support more tests
  - add conftest with common fixtures
  - use parametrize for testing multiple scenarios

* Add changelog
* Add unit tests for Slackware distribution parsing
* Use correct fixtures for Slackware
Data comes from /etc/slackware-version

Co-authored-by: Sam Doran <sdoran@redhat.com>
Co-authored-by: <Eduard Rozenberg <eduardr@pobox.com>>
(cherry picked from commit 566c5e6ce1)

Co-authored-by: Eduard Rozenberg <2648417+edrozenberg@users.noreply.github.com>

Co-authored-by: Eduard Rozenberg <2648417+edrozenberg@users.noreply.github.com>
2020-07-21 11:21:07 -07:00
Abhijeet Kasurde
ed07821a59
[2.10] api: time.clock compatible code (#70677)
time.clock is removed in Python 3.8. Add time.clock
compatible code.

Fixes: #70649

Signed-off-by: Abhijeet Kasurde <akasurde@redhat.com>
(cherry picked from commit 055871cbb8)
Signed-off-by: Abhijeet Kasurde <akasurde@redhat.com>
2020-07-21 11:19:27 -07:00
Brian Coca
6cd015d7e2
Make filter type errors 'loop friendly' (#70417) (#70574)
- ensure we preserve the typeerror part of the exception so loop defereed error handling
 can postpone those caused by undefined variables until the when check is done.
 - fix tests to comply with the 'new normal'

 - human_to_bytes and others can issue TypeError not only on 'non string'
 but also bad string that is not convertable.

Co-authored-by: Sloane Hertel <shertel@redhat.com>

Co-authored-by: Sloane Hertel <shertel@redhat.com>
(cherry picked from commit cf89ca8a03)
2020-07-17 12:51:18 -07:00
Felix Fontein
15355ed059
[2.10] ansible-doc: include collection name in text output / plugin loader: return collection name; ansible-doc: handle ansible.builtin correctly (#70572)
* ansible-doc: include collection name in text output (#70401)

* ansible-doc: include collection name in text output

* Be more careful to not accidentally pass ansible.builtin for user-supplied modules.

(cherry picked from commit f4c89eab23)

* plugin loader: return collection name; ansible-doc: handle ansible.builtin correctly (#70026)

* Determine collection in plugin loader.

* Fix test.

* Use PluginPathContext objects in PluginLoader._plugin_path_cache instead of tuples.

(cherry picked from commit 24dcaf8974)
2020-07-17 12:50:23 -07:00
Martin Krizek
7dfda4026e
Fix delegate_facts with interpreter not being set (#70293) (#70384)
Fixes #70168

ci_complete

Co-authored-by: Brian Coca <bcoca@users.noreply.github.com>
Co-authored-by: Matt Clay <matt@mystile.com>
(cherry picked from commit b05e00e99a)
2020-07-17 12:40:00 -07:00
Abhijeet Kasurde
e1c0688e43
[2.10] Improve ansible-galaxy STDOUT messages for collections (#70379)
- Fix issue #70010
- Add installation successful message
- This feature targets "collection" sub-command and does not affect "role" sub-command

Signed-off-by: Hideki Saito <saito@fgrep.org>
(cherry picked from commit 2d59e548f6)

Co-authored-by: Hideki Saito <saito@fgrep.org>
2020-07-17 12:39:16 -07:00
Matt Davis
1e03b54d23
refactor Python module_utils locator (#70610) (#70711)
* refactor Python module_utils locator

* no longer recursive
* embed special-case module code internally
* share common code between collections/not cases
* fixes #70134
* properly support subpackage redirection
* adds support for FQCN redirect targets used by migration (expands to FQ Python name)
* add tests

* add changelog

(cherry picked from commit c616e54a6e)
2020-07-17 10:57:44 -07:00
Sam Doran
95ec1618ef
[stable-2.10] Only pass kwargs to our string checker not callable checkers (#70151) (#70170)
Since only check_type_str() accepts extra param, only pass to our checker and
do not pass kwargs to custom checkers.

* Add unit tests
(cherry picked from commit bc05415109)

Co-authored-by: Sam Doran <sdoran@redhat.com>
2020-07-17 10:53:56 -07:00
Matt Clay
8cd66ce95a [stable-2.10] Clean up unit test boilerplate.
(cherry picked from commit 98a0995fd0)

Co-authored-by: Matt Clay <matt@mystile.com>
2020-07-13 18:28:02 -07:00
Matt Davis
de63cba7e8
transparent downstream vendoring (#69850)
* builtin downstream vendoring support

* allows downstream packagers to install packages to `ansible/_vendor` that will automatically be added to head of sys.path during `ansible` package load
* tests

* sort conflicting package names in warning text

* sanity fixes

* skip unnecessary comparison
2020-06-15 16:22:25 -07:00
Sam Doran
d45cb01b84
ansible-galaxy - fix collection installation with trailing slashes (#70016)
If we fail to find a member when extracting a directory, try adding a trailing
slash to the member name. In certain cases, the member in the tarfile will
contain a trailing slash but the file name in FILES.json will never contain
the trailing slash.

If unable to find the member, handle the KeyError and print a nicer error.

Also check if a directory exists before creating it since it may have been
extracted from the archive.

Fixes #70009

* Add unit tests
* Use loop for trying to get members
2020-06-15 17:36:07 -04:00
Matt Clay
8ffaed00f8 Add Azure Pipelines support to ansible-test. 2020-06-11 14:57:42 -07:00
James Cassell
47d14a33bd
config: singular ANSIBLE_COLLECTIONS_PATH (#70007)
* config: singular ANSIBLE_COLLECTIONS_PATH

Every other *_PATH setting in ansible is singular, and the traditional
$PATH variable is also singular despite containing a list of
directories.  Let's be consistent both internally and with POSIX
tradition.

* update all ANSIBLE_COLLECTIONS_PATHS env references to be singular

* deprecate plural ANSIBLE_COLLECTIONS_PATHS setting
2020-06-11 11:40:13 -07:00
Jordan Borean
d30fc6c0b3
galaxy - preserve symlinks on build/install (#69959)
* galaxy - preserve symlinks on build/install

* Handle directory symlinks

* py2 compat change

* Updated changelog fragment
2020-06-11 06:46:42 +10:00
Sloane Hertel
51f6d129cb
support hard coded module_defaults.yml groups for collections (#69919)
* Only allow groups which were hardcoded in module_defaults.yml

only load action groups from the collection if module_defaults contains a potential group for the action

* Fix tests using modules that override those whitelisted in lib/ansible/config/module_defaults.yml

Third party modules should not be using group/ - use the action name instead

* add externalized module_defaults tests

add the missing group and collections

ci_complete

Co-authored-by: Matt Davis <mrd@redhat.com>

* changelog

ci_complete

* Fix import in tests

ci_complete

* Update with requested changes

ci_complete

* don't traceback since we don't validate the contents of module_defaults

ci_complete

Co-authored-by: Matt Davis <mrd@redhat.com>
2020-06-09 15:38:57 -07:00
Felix Fontein
a862ff2d43
Deprecation revisited (#69926)
* Allow to specify collection_name separately for deprecation.

* Use new functionality in Ansible.

* Use new functionality in tests.

* Update tagging/untagging functions.

* Update pylint deprecated sanity test.

* Update validate-modules. Missing are basic checks for version_added (validate semantic version format for collections).

* Improve version validation. Re-add version_added validation.

* Make sure collection names are added to return docs before schema validation.

* Extra checks to avoid crashes on bad data.

* Make C# module utils code work, and update/extend tests.

* Add changelog fragment.

* Stop extracting collection name from potentially tagged versions/dates.

* Simplify C# code.

* Update Windows modules docs.

* Forgot semicolons.
2020-06-09 15:21:19 -07:00
Matt Davis
984216f52e
various deprecation, display, warning, error fixes for collections redirection (#69822)
* various deprecation, display, warning, error fixes

* Update lib/ansible/utils/display.py

Co-authored-by: Felix Fontein <felix@fontein.de>

* Update lib/ansible/utils/display.py

Co-authored-by: Felix Fontein <felix@fontein.de>

* Update lib/ansible/utils/display.py

Co-authored-by: Felix Fontein <felix@fontein.de>

* cleanup, test fixes

* add collection name to deprecated() calls

* clean up redirect entries from uncommitted tests

* fix dep warning/error header text to match previous

Co-authored-by: Felix Fontein <felix@fontein.de>
2020-06-05 00:28:40 -07:00
Brian Coca
062e780a68
starting metadata sunset (#69454)
* starting metadata sunset

 - purged metadata from any requirements
 - fix indent in generic handler for yaml content (whey metadata display was off)
 - make more resilient against bad formed docs
 - removed all metadata from docs template
 - remove metadata from schemas
 - removed mdata tests and from unrelated tests

Co-authored-by: Felix Fontein <felix@fontein.de>
Co-authored-by: Rick Elrod <rick@elrod.me>
2020-06-04 21:01:46 -04:00
Alex Schultz
247e43b252
Fix IncludedFile equality check (#69524)
In the case of a free style strategy, it is possible to end up with
multiple hosts trying to include from the same role, however the tasks
being included may be different with the use of tasks_from.  Previously
if you had two hosts that were included the same role when the
process_include_results function tries to determine if a included needs
to be run on a specific host, it would end up merging two different
tasks into which ever one was processed first.

This change updates the equality check to also check if the task uuid
associated with the IncludedFile is the same. The previous check only
checked if the task's parent uuid was the same. This breaks down when
both includes have the same parent.

    - hosts: all
      strategy: free
      gather_facts: false
      tasks:
        - include_role:
            name: random_sleep
        - block:
          - name: set a fact (1)
            include_role:
              name: set_a_fact
              tasks_from: fact1.yml
          - name: set a fact (2)
            include_role:
              name: set_a_fact
              tasks_from: fact2.yml
        - name: include didn't run
          fail:
            msg: >
              set_a_fact didn't run
              fact1: {{ fact1 | default('not defined')}}
              fact2: {{ fact2 | default('not defined') }}"
          when: (fact1 is not defined or fact2 is not defined)

Closes #69521
2020-06-04 10:41:46 -05:00
Dongsu Park
598e3392a9
Discover Flatcar Linux properly for hostname (#69627)
To avoid issues with Flatcar Container Linux being unable to be found,
detect Flatcar distro name especially for hostname, just like CoreOS
Container Linux was supported.

See also https://github.com/ansible/ansible/issues/69516
2020-06-02 18:41:53 +05:30
Sloane Hertel
e40889e711
Add support to install collections from git repositories (#69154)
* Enable installing collections from git repositories

* Add tests for installing individual and multiple collections from git repositories

* Test to make sure recursive dependencies with different syntax are deduplicated

* Add documentation

* add a changelog

* Skip Python 2.6

* Only fail if no collections are located in a git repository

Add support for a 'type' key for collections in requirement.yml files.
Update the changelog and document the supported keys and allowed values for the type.

Add a note that the collection(s) in the repo must contain a galaxy.yml

* Add a warning about embedding credentials in SCM URLs

* Update with review suggestions

* suppress sanity compile failure for Python 2.6
2020-05-29 13:33:32 -04:00
Karl Fogel
225ae65b0f
Make Python path warning say what it means to say (#69669) 2020-05-29 13:15:11 -04:00
Abhijeet Kasurde
7b3d9cbcb8
distribution: Added support for openEuler OS (#69324)
Detect os_family for openEuler OS as 'RedHat', instead of 'openEuler'.

Signed-off-by: Abhijeet Kasurde <akasurde@redhat.com>
2020-05-29 12:43:16 +05:30
Felix Fontein
40f21dfd3c
Version source tagging (automatic and manual) for version_added and deprecation versions (#69680)
* Track collection for version_added.
Validate *all* version numbers in validate-modules.
For tagged version numbers (i.e. version_added), consider source collection to chose validation.

* Make tagging/untagging functions more flexible.

* Tag all versions in doc fragments.

* Tag all deprecation versions issued by code.

* Make Display.deprecated() understand tagged versions.

* Extend validation to enforce tagged version numbers.

* Tag versions in tests.

* Lint and fix test.

* Mention collection name in collection loader's deprecation/removal messages.

* Fix error IDs.

* Handle tagged dates in Display.deprecated().

* Also require that removed_at_date and deprecated_aliases.date are tagged.

* Also automatically tag/untag removed_at_date; fix sanity module removal version check.

* Improve error message when invalid version number is used (like '2.14' in collections).
2020-05-28 22:46:16 -07:00
Abhijeet Kasurde
564907d8ac
distribution: Refactor test_distribution_version testcases (#69300) 2020-05-27 14:01:31 +05:30
Felix Fontein
ea04e0048d
Allow to deprecate options and aliases by date (#68177)
* Allow to deprecate options and aliases by date instead of only by version.

* Update display.deprecate().

* Adjust behavior to conform to tested behavior, extend tests, and improve C# style.

* Parse date and fail on invalid date.

This is mainly to make sure that people start using invalid dates, and we eventually have a mess to clean up.

* C# code: improve validation and update/extend tests.

* Make sure that deprecate() is not called with both date and version.

* Forgot to remove no longer necessary formatting.

* Adjust order of warnings in C# code.

* Adjust unrelated test.

* Fix grammar (and make that test pass).

* Don't parse date, and adjust message to be same as in #67684.

* Sanity tests: disable date in past test.

* Validate-modules: validate ISO 8601 date format.

* Validate-modules: switch schema declaration for deprecated_aliases to improve error messages for invalid dates.

* Use DateTime instead of string for date deprecation.

* Validate that date in deprecated_aliases is actually a DateTime.

* Fix tests.

* Fix rebasing error.

* Adjust error codes for pylint, and add removed_at_date and deprecated_aliases.date checks to validate-modules.

* Make deprecation date in the past error codes optional.

* Make sure not both version and date are specified for AnsibleModule.deprecate() calls.

* Stop using Python 3.7+ API.

* Make sure errors are actually reported. Re-add 'ansible-' prefix.

* Avoid crashing when 'name' isn't there.

* Linting.

* Update lib/ansible/module_utils/csharp/Ansible.Basic.cs

Co-authored-by: Jordan Borean <jborean93@gmail.com>

* Adjust test to latest change.

* Prefer date over version if both end up in Display.deprecated().

Co-authored-by: Jordan Borean <jborean93@gmail.com>
2020-05-26 20:23:56 -04:00
Matt Davis
fa81cc6a0c
fix delegated loading when path is not a directory (#69713)
* find_module can't pop ImportError- we need to just translate to `None` since this is a normal condition with files on sys.path (eg `/usr/lib/python36.zip`)
* added test
2020-05-26 15:55:17 -07:00
Matt Davis
f7dfa817ae
collection routing (#67684)
* `meta/` directory in collections
* runtime metadata for redirection/deprecation/removal of plugin loads
* a compatibility layer to keep existing content working on ansible-base + collections
* a Python import redirection layer to keep collections-hosted (and otherwise moved) content importable by things that don't know better
* supported Ansible version validation on collection loads
2020-05-26 09:42:06 -07:00
Nilashish Chakraborty
dae3ba71a8
Add FQCN mappings for network facts modules (#69601)
* Add FQCN mappings for network facts modules

Signed-off-by: NilashishC <nilashishchakraborty8@gmail.com>

* Add unit tests

Signed-off-by: NilashishC <nilashishchakraborty8@gmail.com>

* update entry for ironware

Signed-off-by: NilashishC <nilashishchakraborty8@gmail.com>
2020-05-22 23:20:21 +05:30
Brian Coca
de3f7c7739
fix delegated interpreter discovery (#69604)
* fix delegated interpeter
* allow returning fact if it is 'the right host'
* added note for future fix/efficiency
 as it stands we rerun discovery for the delegated host
unless its saving facts to itself
 * fixed test lacking delegate_to mock
2020-05-22 09:31:34 -04:00
Matt Martz
e0f25a2b1f
Strip no log values from module response keys. Fixes #68400 (#69653) 2020-05-21 16:17:57 -04:00
Martin Krizek
1ee70fc272
ansible.utils.vars.isidentifier improvements (#58278)
ci_complete
2020-05-21 19:54:40 +02:00
Matt Martz
b748edea45
Add multipart/form-data functionality (#69376)
* Add multipart/form-data functionality

* Fix some linting issues

* Fix error message

* Allow filename to be provided with content

* Add integration test

* Update examples

* General improvements to multipart handling

* Use prepare_multipart for galaxy collection publish

* Properly account for py2 vs py3, ensuring no max header length

* Address test assumptions

* Add unit tests

* Add changelog

* Ensure to use CRLF instead of NL

* Ignore line-endings in fixture

* Consolidate code, add comment

* Bump fallaxy container version

* ci_complete
2020-05-20 15:44:01 -05:00
Sam Doran
f01de15d25
ansible-galaxy - remove warning during collection install (#69541)
* ansible-galaxy - remove warning during collection install

If existing collections do not contain a MANIFEST.json, which is common
for collections under development that were not installed from Ansible
Galaxy, fall back to inspecting galaxy.yml rather than displaying a
warning.

A warning will still be displayed in neither a MANIFEST.json nor
galaxy.yml are present.

* Update unit tests
2020-05-19 10:31:49 -05:00
Jordan Borean
ecea15c508
Unify ansible-galaxy install -r (#67843)
* Unify ansible-galaxy install -r

* Minor nit fixes for docs

* Re-align warnings

* Fix up integration test

* Fix up test where no roles/collections were in file
2020-05-19 05:09:42 +10:00
Matt Clay
e7c2eb519b
Add Shippable request signing to ansible-test. (#69526) 2020-05-15 15:38:02 -07:00
Lukas Pirl
34db57a47f
introduce fact "ansible_processor_nproc": number of usable vcpus (#66569)
This fact reflects the number of usable vcpus (which might be different
from ansible_processor_vcpus, e.g., in containers with limits). See
also #51504.

* Add fixture data and update unit tests

Co-authored-by: Sam Doran <sdoran@redhat.com>
2020-05-15 09:38:56 -04:00
Matt Clay
d0484fbf74 Cleanup for Python 3.9 and pycodestyle compat. 2020-05-14 21:06:16 -07:00
Sloane Hertel
343ffaa18b
better error for "ansible-galaxy collection verify" if there's no MANIFEST.json (#67498)
* Add a better error for "ansible-galaxy verify" if the MANIFEST.json has been deleted from the installed collection or if the collection hasn't been installed via normal means

* Fix unit tests for the remote collection

If there's something wrong with the local collection's version it will fail before the remote collection is sought

* Add a test for the new error msg

* Prevent the duplicate warning

Mock the new isfile call where needed

* Update lib/ansible/galaxy/collection.py

Co-Authored-By: Martin Krizek <martin.krizek@gmail.com>

Co-authored-by: Martin Krizek <martin.krizek@gmail.com>
2020-05-14 12:25:19 -04:00
Bob Weinand
f200487414
Fix filedescriptor out of range in select() when running commands (#65058)
* Fix filedescriptor out of range in select() when running commands

* Simplify the run_command() code

Now that we're using selectors in run_command(), we can simplify some of
the code.

* Use fileobj.read() instead of os.read()
* No longer use get_buffer_size() as we can just slurp all of the data
  instead.

Also use a simpler conditional check of whether the selector map is
empty

Co-authored-by: Toshio Kuratomi <a.badger@gmail.com>
2020-05-14 11:46:34 -04:00