Commit Graph

339 Commits

Author SHA1 Message Date
Miss Islington (bot) 713b4bbd97
bpo-40550: Fix time-of-check/time-of-action issue in subprocess.Popen.send_signal. (GH-20010)
send_signal() now swallows the exception if the process it thought was still alive winds up not to exist anymore (always a plausible race condition despite the checks).

Co-authored-by: Gregory P. Smith <greg@krypto.org>
(cherry picked from commit 01a202ab6b)

Co-authored-by: Filipe Laíns <lains@archlinux.org>
2020-11-21 01:46:21 -08:00
Victor Stinner 1def7754b7
bpo-40334: Rename PyConfig.use_peg to _use_peg_parser (GH-19670)
* Rename PyConfig.use_peg to _use_peg_parser
* Document PyConfig._use_peg_parser and mark it a deprecated
* Mark -X oldparser option and PYTHONOLDPARSER env var as deprecated
  in the documentation.
* Add use_old_parser() and skip_if_new_parser() to test.support
* Remove sys.flags.use_peg: use_old_parser() uses
  _testinternalcapi.get_configs() instead.
* Enhance test_embed tests
* subprocess._args_from_interpreter_flags() copies -X oldparser
2020-04-23 03:03:24 +02:00
Guido van Rossum 48b069a003
bpo-39481: Implementation for PEP 585 (#18239)
This implements things like `list[int]`,
which returns an object of type `types.GenericAlias`.
This object mostly acts as a proxy for `list`,
but has attributes `__origin__` and `__args__`
that allow recovering the parts (with values `list` and `(int,)`.

There is also an approximate notion of type variables;
e.g. `list[T]` has a `__parameters__` attribute equal to `(T,)`.
Type variables are objects of type `typing.TypeVar`.
2020-04-07 09:50:06 -07:00
Victor Stinner 65a796e527
bpo-40094: Add os.waitstatus_to_exitcode() (GH-19201)
Add os.waitstatus_to_exitcode() function to convert a wait status to an
exitcode.

Suggest waitstatus_to_exitcode() usage in the documentation when
appropriate.

Use waitstatus_to_exitcode() in:

* multiprocessing, os, subprocess and _bootsubprocess modules;
* test.support.wait_process();
* setup.py: run_command();
* and many tests.
2020-04-01 18:49:29 +02:00
Victor Stinner c6e5c1123b
bpo-39489: Remove COUNT_ALLOCS special build (GH-18259)
Remove:

* COUNT_ALLOCS macro
* sys.getcounts() function
* SHOW_ALLOC_COUNT code in listobject.c
* SHOW_TRACK_COUNT code in tupleobject.c
* PyConfig.show_alloc_count field
* -X showalloccount command line option
* @test.support.requires_type_collecting decorator
2020-02-03 15:17:15 +01:00
Alex Rebert d3ae95e1e9 bpo-35182: fix communicate() crash after child closes its pipes (GH-17020) (GH-18117)
When communicate() is called in a loop, it crashes when the child process
has already closed any piped standard stream, but still continues to be running

Co-authored-by: Andriy Maletsky <andriy.maletsky@gmail.com>
2020-01-22 15:28:31 -08:00
Victor Stinner e85a305503
bpo-38630: Fix subprocess.Popen.send_signal() race condition (GH-16984)
On Unix, subprocess.Popen.send_signal() now polls the process status.
Polling reduces the risk of sending a signal to the wrong process if
the process completed, the Popen.returncode attribute is still None,
and the pid has been reassigned (recycled) to a new different
process.
2020-01-15 17:38:55 +01:00
Batuhan Taşkaya 4dc5a9df59 bpo-39019: Implement missing __class_getitem__ for subprocess classes (GH-17558) 2019-12-30 16:02:04 +00:00
Andrey Doroschenko 645005e947 bpo-38724: Implement subprocess.Popen.__repr__ (GH-17151) 2019-11-17 16:08:31 +02:00
Gregory P. Smith f3751efb5c
bpo-38417: Add umask support to subprocess (GH-16726)
On POSIX systems, allow the umask to be set in the child process before we exec.
2019-10-12 13:24:56 -07:00
Victor Stinner faca855342 bpo-36046: posix_spawn() doesn't support uid/gid (GH-16384)
* subprocess.Popen now longer uses posix_spawn() if uid, gid or gids are set.
* test_subprocess: add "nobody" and "nfsnobody" group names for test_group().
* test_subprocess: test_user() and test_group() are now also tested with close_fds=False.
2019-09-25 15:52:49 +02:00
Patrick McLean 2b2ead7438 bpo-36046: Add user and group parameters to subprocess (GH-11950)
* subprocess: Add user, group and extra_groups paremeters to subprocess.Popen

This adds a `user` parameter to the Popen constructor that will call
setreuid() in the child before calling exec(). This allows processes
running as root to safely drop privileges before running the subprocess
without having to use a preexec_fn.

This also adds a `group` parameter that will call setregid() in
the child process before calling exec().

Finally an `extra_groups` parameter was added that will call
setgroups() to set the supplimental groups.
2019-09-12 18:15:44 +01:00
Gregory P. Smith 580d2782f7 bpo-37424: Avoid a hang in subprocess.run timeout output capture (GH-14490)
Fixes a possible hang when using a timeout on subprocess.run() while
capturing output. If the child process spawned its own children or otherwise
connected its stdout or stderr handles with another process, we could hang
after the timeout was reached and our child was killed when attempting to read
final output from the pipes.
2019-09-11 02:23:05 -07:00
Matthias 182e1d1f84 Fix subprocess docstring typo (GH-15812) 2019-09-10 14:51:09 +01:00
Ruslan Kuprieiev 042821ae3c bpo-37380: subprocess: don't use _active on win (GH-14360)
As noted by @eryksun in [1] and [2], using _cleanup and _active(in
__del__) is not necessary on Windows, since:

> Unlike Unix, a process in Windows doesn't have to be waited on by
> its parent to avoid a zombie. Keeping the handle open will actually
> create a zombie until the next _cleanup() call, which may be never
> if Popen() isn't called again.

This patch simply defines `subprocess._active` as `None`, for which we already
have the proper logic in place in `subprocess.Popen.__del__`, that prevents it
from trying to append the process to the `_active`. This patch also defines
`subprocess._cleanup` as a noop for Windows.

[1] https://bugs.python.org/issue37380#msg346333
[2] https://bugs.python.org/issue36067#msg336262

Signed-off-by: Ruslan Kuprieiev <ruslan@iterative.ai>
2019-06-28 18:12:16 +02:00
Steve Dower 60419a7e96
bpo-37363: Add audit events for a range of modules (GH-14301) 2019-06-24 08:42:54 -07:00
Rémi Lapeyre 8cc605acdd bpo-34886: Fix subprocess.run handling of exclusive arguments (GH-11727)
Fix an unintended ValueError from :func:`subprocess.run` when checking for
conflicting `input` and `stdin` or `capture_output` and `stdout` or `stderr` args
when they were explicitly provided but with `None` values within a passed in
`**kwargs` dict rather than as passed directly by name.
2019-06-08 07:56:24 -07:00
Serhiy Storchaka 9e3c452639
bpo-31961: Fix support of path-like executables in subprocess. (GH-5914) 2019-05-28 22:49:35 +03:00
Serhiy Storchaka 96aeaec647
bpo-36793: Remove unneeded __str__ definitions. (GH-13081)
Classes that define __str__ the same as __repr__ can
just inherit it from object.
2019-05-06 22:29:40 +03:00
Giampaolo Rodola bafa8487f7 subprocess: close pipes/fds by using ExitStack (GH-11686)
Close pipes/fds in subprocess by using ExitStack.

"In case of premature failure on X.Close() or os.close(X) the remaining pipes/fds will remain "open". Perhaps it makes sense to use contextlib.ExitStack."
- Rationale: https://github.com/python/cpython/pull/11575#discussion_r250288394
2019-01-29 13:14:24 -08:00
Gregory P. Smith 81d04bcf21
Fix docstr/comment typos in _use_posix_spawn(). (GH-11684) 2019-01-26 15:19:11 -08:00
Victor Stinner f6243ac1e4
bpo-35537: subprocess can use posix_spawn with pipes (GH-11575)
* subprocess.Popen can now also use os.posix_spawn() with pipes,
  but only if pipe file descriptors are greater than 2.
* Fix Popen._posix_spawn(): set '_child_created' attribute to True.
* Add Popen._close_pipe_fds() helper function to factorize the code.
2019-01-23 19:00:39 +01:00
Victor Stinner 8c349565e8
Revert "bpo-35537: subprocess can now use os.posix_spawnp (GH-11579)" (GH-11582)
This reverts commit 0785889468.
2019-01-16 23:38:06 +01:00
Victor Stinner 0785889468
bpo-35537: subprocess can now use os.posix_spawnp (GH-11579)
The subprocess module can now use the os.posix_spawnp() function,
if it is available, to locate the program in the PATH.
2019-01-16 15:26:20 +01:00
Victor Stinner 9daecf37a5
bpo-35537: subprocess uses os.posix_spawn in some cases (GH-11452)
The subprocess module can now use the os.posix_spawn() function
in some cases for better performance. Currently, it is only used on macOS
and Linux (using glibc 2.24 or newer) if all these conditions are met:

* executable path contains a directory
* close_fds=False
* preexec_fn, pass_fds, cwd, stdin, stdout, stderr
  and start_new_session parameters are not set

Co-authored-by: Joannah Nanjekye <nanjekyejoannah@gmail.com>
2019-01-16 00:02:35 +01:00
Victor Stinner 9de3632715
bpo-34812: subprocess._args_from_interpreter_flags(): add isolated (GH-10675)
The "-I" command line option (run Python in isolated mode) is now
also copied by the multiprocessing and distutils modules when
spawning child processes. Previously, only -E and -s options (enabled
by -I) were copied.

subprocess._args_from_interpreter_flags() now copies the -I flag.
2018-11-23 17:54:20 +01:00
Alexey Izbyshev a2670565d8 bpo-32236: open() emits RuntimeWarning if buffering=1 for binary mode (GH-4842)
If buffering=1 is specified for open() in binary mode, it is silently
treated as buffering=-1 (i.e., the default buffer size).
Coupled with the fact that line buffering is always supported in Python 2,
such behavior caused several issues (e.g., bpo-10344, bpo-21332).

Warn that line buffering is not supported if open() is called with
binary mode and buffering=1.
2018-10-20 02:22:31 +02:00
Zackery Spytz 73870bfeb9 closes bpo-32490: Fix filename duplication in subprocess exception message. (GH-9163)
8621bb5d93 sets the filename in directly in the FileNotFoundError, so we may revert the earlier fix 5f78040057.
2018-09-11 08:54:07 -07:00
Zachary Ware 880d42a3b2
bpo-8110: Refactor platform detection in subprocess (GH-9053)
Check for functionality via imports rather than checking sys.platform
specifically for Windows
2018-09-10 16:16:08 -07:00
Victor Stinner 483422f57e
bpo-34044: subprocess.Popen copies startupinfo (GH-8090)
subprocess.Popen now copies the startupinfo argument to leave it
unchanged: it will modify the copy, so that the same STARTUPINFO
object can be used multiple times.

Add subprocess.STARTUPINFO.copy() method.
2018-07-05 22:54:17 +02:00
Serhiy Storchaka be50a7b627 Revert "bpo-31961: subprocess now accepts path-like args (GH-4329)" (#5912)
* Revert "bpo-31961: subprocess now accepts path-like args (GH-4329)"

This reverts commit dd42cb71f2.
2018-02-27 18:03:46 -05:00
Anders Lorentsen dd42cb71f2 bpo-31961: subprocess now accepts path-like args (GH-4329)
Allow os.PathLike args in subprocess APIs.
2018-01-29 23:27:28 -08:00
Bo Bayles ce0f33d045 bpo-32102 Add "capture_output=True" to subprocess.run (GH-5149)
Add "capture_output=True" option to subprocess.run, this is equivalent to
setting stdout=PIPE, stderr=PIPE but is much more readable.
2018-01-29 22:40:39 -08:00
Gregory P. Smith f4d644f36f
bpo-25942: make subprocess more graceful on ^C (GH-5026)
Do not allow receiving a SIGINT to cause the subprocess module to trigger an
immediate SIGKILL of the child process.  SIGINT is normally sent to all child
processes by the OS at the same time already as was the established normal
behavior in 2.7 and 3.2.  This behavior change was introduced during the fix to https://bugs.python.org/issue12494 and is generally surprising to command line
tool users who expect other tools launched in child processes to get their own
SIGINT and do their own cleanup.

In Python 3.3-3.6 subprocess.call and subprocess.run would immediately
SIGKILL the child process upon receiving a SIGINT (which raises a
KeyboardInterrupt).  We now give the child a small amount of time to
exit gracefully before resorting to a SIGKILL.

This is also the case for subprocess.Popen.__exit__ which would
previously block indefinitely waiting for the child to die.  This was
hidden from many users by virtue of subprocess.call and subprocess.run
sending the signal immediately.

Behavior change: subprocess.Popen.__exit__ will not block indefinitely
when the exiting exception is a KeyboardInterrupt.  This is done for
user friendliness as people expect their ^C to actually happen.  This
could cause occasional orphaned Popen objects when not using `call` or
`run` with a child process that hasn't exited.

Refactoring involved: The Popen.wait method deals with the
KeyboardInterrupt second chance, existing platform specific internals
have been renamed to _wait().
Also fixes comment typos.
2018-01-29 21:27:39 -08:00
Segev Finer b2a6083eb0 bpo-19764: Implemented support for subprocess.Popen(close_fds=True) on Windows (#1218)
Even though Python marks any handles it opens as non-inheritable there
is still a race when using `subprocess.Popen` since creating a process
with redirected stdio requires temporarily creating inheritable handles.
By implementing support for `subprocess.Popen(close_fds=True)` we fix
this race.

In order to implement this we use PROC_THREAD_ATTRIBUTE_HANDLE_LIST
which is available since Windows Vista. Which allows to pass an explicit
list of handles to inherit when creating a process.

This commit also adds `STARTUPINFO.lpAttributeList["handle_list"]`
which can be used to control PROC_THREAD_ATTRIBUTE_HANDLE_LIST
directly.
2017-12-18 10:28:19 +01:00
Victor Stinner 91106cd9ff
bpo-29240: PEP 540: Add a new UTF-8 Mode (#855)
* Add -X utf8 command line option, PYTHONUTF8 environment variable
  and a new sys.flags.utf8_mode flag.
* If the LC_CTYPE locale is "C" at startup: enable automatically the
  UTF-8 mode.
* Add _winapi.GetACP(). encodings._alias_mbcs() now calls
  _winapi.GetACP() to get the ANSI code page
* locale.getpreferredencoding() now returns 'UTF-8' in the UTF-8
  mode. As a side effect, open() now uses the UTF-8 encoding by
  default in this mode.
* Py_DecodeLocale() and Py_EncodeLocale() now use the UTF-8 encoding
  in the UTF-8 Mode.
* Update subprocess._args_from_interpreter_flags() to handle -X utf8
* Skip some tests relying on the current locale if the UTF-8 mode is
  enabled.
* Add test_utf8mode.py.
* _Py_DecodeUTF8_surrogateescape() gets a new optional parameter to
  return also the length (number of wide characters).
* pymain_get_global_config() and pymain_set_global_config() now
  always copy flag values, rather than only copying if the new value
  is greater than the old value.
2017-12-13 12:29:09 +01:00
Victor Stinner 747f48e2e9
bpo-32230: Set sys.warnoptions with -X dev (#4820)
Rather than supporting dev mode directly in the warnings module, this
instead adjusts the initialisation code to add an extra 'default'
entry to sys.warnoptions when dev mode is enabled.

This ensures that dev mode behaves *exactly* as if `-Wdefault` had
been passed on the command line, including in the way it interacts
with `sys.warnoptions`, and with other command line flags like `-bb`.

Fix also bpo-20361: have -b & -bb options take precedence over any
other warnings options.

Patch written by Nick Coghlan, with minor modifications of Victor Stinner.
2017-12-12 22:59:48 +01:00
Victor Stinner 09f3a8a124
bpo-32089: Fix warnings filters in dev mode (#4482)
The developer mode (-X dev) now creates all default warnings filters
to order filters in the correct order to always show ResourceWarning
and make BytesWarning depend on the -b option.

Write a functional test to make sure that ResourceWarning is logged
twice at the same location in the developer mode.

Add a new 'dev_mode' field to _PyCoreConfig.
2017-11-20 17:32:40 -08:00
Victor Stinner f39b674876
bpo-32094: Update subprocess for -X dev (#4480)
Modify subprocess._args_from_interpreter_flags() to handle -X dev
option.

Add also unit tests for test.support.args_from_interpreter_flags()
and test.support.optim_args_from_interpreter_flags().
2017-11-20 15:24:56 -08:00
James b5d9e08114 bpo-31884 subprocess: add Windows constants for process priority (#4150) 2017-11-08 06:18:59 -08:00
luzpaz a5293b4ff2 Fix miscellaneous typos (#4275) 2017-11-05 15:37:50 +02:00
andyclegg 7fed7bd8bb bpo-31756: subprocess.run should alias universal_newlines to text (#4049)
Improve human friendliness of the Popen API: Add text=False as a
keyword-only argument to subprocess.Popen along with a Popen
attribute .text_mode and set this based on the
encoding/errors/universal_newlines/text arguments.

The universal_newlines parameter and attribute are maintained for
backwards compatibility.
2017-10-22 19:01:19 -07:00
Joel Schaerer 88031a9ade Update subprocess.communicate() docstring.
Explicitly state that communicate() closes stdin after writing input to it.
2017-09-13 12:11:20 -07:00
Gregory P. Smith 2eb0cb4787 bpo-22635: Update the getstatusoutput docstring. (#3435)
To match the documentation updates already made.
Also renames the local variable used within to match
what it actually holds.
2017-09-07 16:11:02 -07:00
Antoine Pitrou a6a4dc816d bpo-31370: Remove support for threads-less builds (#3385)
* Remove Setup.config
* Always define WITH_THREAD for compatibility.
2017-09-07 18:56:24 +02:00
Ammar Askar 3fc499bca1 bpo-31178: Avoid concatenating bytes with str in subprocess error (#3066)
Avoid concatenating bytes with str in the typically rare subprocess error path (exec failed). Includes a mock based unittest to exercise the codepath.
2017-09-05 23:41:30 -07:00
Gregory P. Smith 8621bb5d93 bpo-22536: Set the filename in FileNotFoundError. (#3194)
Have the subprocess module set the filename in the FileNotFoundError
exception raised on POSIX systems when the executable or cwd are missing.
2017-08-24 14:58:25 -07:00
Segev Finer 4d3851727f bpo-30121: Fix debug assert in subprocess on Windows (#1224)
* bpo-30121: Fix debug assert in subprocess on Windows

This is caused by closing HANDLEs using os.close which is for CRT file
descriptors and not for HANDLEs.

* bpo-30121: Suppress debug assertion in test_subprocess when ran directly
2017-08-18 15:18:13 +02:00
Serhiy Storchaka d174d24a5d bpo-30730: Prevent environment variables injection in subprocess on Windows. (#2325)
Prevent passing other invalid environment variables and command arguments.
2017-06-23 19:39:27 +03:00
Victor Stinner d52aa31378 bpo-30418: Popen.communicate() always ignore EINVAL (#2002)
On Windows, subprocess.Popen.communicate() now also ignore EINVAL
on stdin.write() if the child process is still running but closed the
pipe.
2017-06-08 17:30:39 +02:00