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78 Commits

Author SHA1 Message Date
Miss Islington (bot) b90c68586e bpo-32777: Fix _Py_set_inheritable async-safety in subprocess (GH-5560) (GH-5563) 
Fix a rare but potential pre-exec child process deadlock in subprocess on POSIX systems when marking file descriptors inheritable on exec in the child process.  This bug appears to have been introduced in 3.4 with the inheritable file descriptors support.

This also changes Python/fileutils.c `set_inheritable` to use the "slow" two `fcntl` syscall path instead of the "fast" single `ioctl` syscall path when asked to be async signal safe (by way of being asked not to raise exceptions).  `ioctl` is not a POSIX async-signal-safe approved function.

ref: http://pubs.opengroup.org/onlinepubs/9699919799/functions/V2_chap02.html
(cherry picked from commit c1e46e94de)

Co-authored-by: Alexey Izbyshev <izbyshev@users.noreply.github.com>
 2018-02-05 22:51:10 -08:00
Serhiy Storchaka e254617262 [3.6] bpo-30065: Fixed arguments validation in _posixsubprocess.fork_exec(). (GH-1110) (#1186) 
(cherry picked from commit 66bffd1)
 2017-04-19 23:59:02 +03:00
Serhiy Storchaka 9574e0adf2 Issue #20947: Fixed a gcc warning with -Wstrict-overflow. 2016-09-27 22:04:45 +03:00
Serhiy Storchaka 5ae4f49f4a Issue #20947: Fixed a gcc warning with -Wstrict-overflow. 2016-09-27 22:03:51 +03:00
Xavier de Gaye c716f183f8 Issue #26862: SYS_getdents64 does not need to be defined on android API 21. 2016-06-15 11:35:29 +02:00
Serhiy Storchaka ef1585eb9a Issue #25923: Added more const qualifiers to signatures of static and private functions. 2015-12-25 20:01:53 +02:00
Martin Panter 6a77c2d978 Issue #25764: Merge subprocess fix from 3.4 into 3.5 2015-12-05 02:03:42 +00:00
Martin Panter afdd51343c Issue #25764: Preserve subprocess fork exception when preexec_fn used 
Also fix handling of failure to release the import lock.
 2015-11-30 02:21:41 +00:00
Gregory P. Smith d0a5b1c343 Fixes #23564: Fix a partially broken sanity check in the _posixsubprocess 
internals regarding how fds_to_pass were passed to the child.  The bug
had no actual impact as subprocess.py already avoided it.
 2015-11-15 21:15:26 -08:00
Victor Stinner bc5b80bac1 Close #24784: Fix compilation without thread support 
Add "#ifdef WITH_THREAD" around cals to:

* PyGILState_Check()
* _PyImport_AcquireLock()
* _PyImport_ReleaseLock()
 2015-10-11 09:54:42 +02:00
Gregory P. Smith 9afe8a3306 Fix computation of max_fd on OpenBSD. Issue #23852. 2015-04-25 23:44:02 -07:00
Gregory P. Smith f9681776c9 Fix computation of max_fd on OpenBSD. Issue #23852. 2015-04-25 23:43:34 -07:00
Gregory P. Smith 4dff6f6fa6 Issue9951: update _hashopenssl and md5module to use _Py_strhex(). 
Also update _posixsubprocess to use Py_hexdigits instead of its own constant.
 2015-04-25 23:42:38 +00:00
Victor Stinner 33f96f1800 Merge 3.4 (_posixsubprocess) 2015-04-02 16:25:01 +02:00
Victor Stinner e7c749238e Issue #23851: close() must not be retried when it fails with EINTR 
See the PEP 475 for the rationale.
 2015-04-02 16:24:46 +02:00
Victor Stinner 185fd33a17 Issue #23836: Use _Py_write_noraise() to retry on EINTR in child_exec() of 
_posixsubprocess
 2015-04-01 18:35:53 +02:00
Victor Stinner 160e819a1d Issue #23694: Fix usage of _Py_open() in the _posixsubprocess module 
Don't call _Py_open() from _close_open_fds_safe() because it is call just after
fork(). It's not good to play with locks (the GIL) between fork() and exec().

Use instead _Py_open_noraise() which doesn't touch to the GIL.
 2015-03-30 02:18:31 +02:00
Victor Stinner a555cfcb73 Issue #23694: Enhance _Py_open(), it now raises exceptions 
* _Py_open() now raises exceptions on error. If open() fails, it raises an
  OSError with the filename.
* _Py_open() now releases the GIL while calling open()
* Add _Py_open_noraise() when _Py_open() cannot be used because the GIL is not
  held
 2015-03-18 00:22:14 +01:00
Victor Stinner 8f437aac06 Issue #22290: Fix error handling in the _posixsubprocess module. 
* Don't call the garbage collector with an exception set: it causes an
  assertion to fail in debug mode.
* Enhance also error handling if allocating an array for the executable list
  failed.
* Add an unit test for 4 different errors in the _posixsubprocess module.
 2014-10-05 17:25:19 +02:00
Gregory P. Smith a26987a0a5 Fix the comment to not refer to the removed end_fd parameter. 2014-06-01 13:46:36 -07:00
Gregory P. Smith d4dcb70287 Don't restrict ourselves to a "max" fd when closing fds before exec() 
when we have a way to get an actual list of all open fds from the OS.

Fixes issue #21618: The subprocess module would ignore fds that were
inherited by the calling process and already higher than POSIX resource
limits would otherwise allow.  On systems with a functioning /proc/self/fd
or /dev/fd interface the max is now ignored and all fds are closed.
 2014-06-01 13:18:28 -07:00
Gregory P. Smith efeb9da4ae Add conditional code for android's lack of definition of SYS_getdent64. 
Fixes issue20307.  No Misc/NEWS entry because frankly this is an
esoteric platform for anyone to be figuring out how to cross compile
CPython for.
 2014-04-14 13:31:21 -07:00
Gregory P. Smith 54532c9742 Undo supposed fix for Issue #15798 until I understand why this is 
causing test_multiprocessing_forkserver and test_multiprocessing_spawn
failures on head (3.4).
 2013-12-01 00:13:35 -08:00
Gregory P. Smith 361e30c17a Undo supposed fix for Issue #15798 until I understand why this is 
causing test_multiprocessing_forkserver and test_multiprocessing_spawn
failures on head (3.4).
 2013-12-01 00:12:24 -08:00
Gregory P. Smith 1c27e3c7fb Fixes Issue #15798 - subprocess.Popen() no longer fails if file 
descriptor 0, 1 or 2 is closed.
 2013-11-30 19:04:00 -08:00
Gregory P. Smith 1eda9e7c30 Fixes Issue #15798 - subprocess.Popen() no longer fails if file 
descriptor 0, 1 or 2 is closed.
 2013-11-30 19:02:57 -08:00
Victor Stinner daf455554b Issue #18571: Implementation of the PEP 446: file descriptors and file handles 
are now created non-inheritable; add functions os.get/set_inheritable(),
os.get/set_handle_inheritable() and socket.socket.get/set_inheritable().
 2013-08-28 00:53:59 +02:00
Charles-François Natali a439b32cf0 Merge. 2013-08-25 18:28:44 +02:00
Charles-François Natali 249cdc39fc Issue #18763: subprocess: The file descriptors are now closed after calling the 
preexec_fn callback, which may open file descriptors.
 2013-08-25 18:24:45 +02:00
Gregory P. Smith b394c1dac8 Fixes Issue #16962: Use getdents64 instead of the obsolete getdents syscall 
in the subprocess module on Linux.
 2013-03-03 10:53:27 -08:00
Gregory P. Smith 255bf5b9ec Issue #16962: Use getdents64 instead of the obsolete getdents syscall in 
the subprocess module on Linux.
 2013-03-03 10:45:05 -08:00
Gregory P. Smith 8d07c264e4 Raise our own SubprocessError rather than a RuntimeError in when dealing with 
odd rare errors coming from the subprocess module.
 2012-11-10 23:53:47 -08:00
Gregory P. Smith a10ddb8a55 Fixes Issue #16114: The subprocess module no longer provides a 
misleading error message stating that args[0] did not exist when
either the cwd or executable keyword arguments specified a path that
did not exist.
 2012-10-10 03:44:47 -07:00
Gregory P. Smith 5591b02a4c Fixes Issue #16114: The subprocess module no longer provides a 
misleading error message stating that args[0] did not exist when
either the cwd or executable keyword arguments specified a path that
did not exist.

It now keeps track of if the child got as far as preexec and reports it if
not back to the parent via a special "noexec" error message value in
the error pipe so that the cwd can be blamed for a failed chdir
instead of the exec of the executable being blamed instead.

The executable is also always reported accurately when exec fails.

Unittests enhanced to cover these cases.
 2012-10-10 03:34:47 -07:00
Ross Lagerwall a4b070102a Merge with 3.2 2012-08-24 13:32:14 +02:00
Ross Lagerwall f2b34b8b96 Issue 15777: Fix a refleak in _posixsubprocess. 
It was exposed by 03c98d05b140 and dbbf3ccf72e8.
 2012-08-24 13:25:59 +02:00
Stefan Krah c0c03be53e Merge 3.2. 2012-08-20 14:42:59 +02:00
Stefan Krah db579d7b25 Issue #15738: Fix a missing NULL check in subprocess_fork_exec(). 2012-08-20 14:36:47 +02:00
Antoine Pitrou 721738fbee Issue #15604: Update uses of PyObject_IsTrue() to check for and handle errors correctly. 
Patch by Serhiy Storchaka.
 2012-08-15 23:20:39 +02:00
Antoine Pitrou 6f430e4963 Issue #15604: Update uses of PyObject_IsTrue() to check for and handle errors correctly. 
Patch by Serhiy Storchaka.
 2012-08-15 23:18:25 +02:00
Gregory P. Smith 902274e948 Fixes issue #15000: support the odd x32 abi on posixsubprocess's system call. 2012-06-05 13:30:24 -07:00
Gregory P. Smith 58f07a9d6d Fixes issue #15000: support the odd x32 abi on posixsubprocess's system call. 2012-06-05 13:26:39 -07:00
Ross Lagerwall 71faefc37e Issue #14359: Only use O_CLOEXEC in _posixmodule.c if it is defined. 
Based on patch from Hervé Coatanhay.
 2012-03-19 06:08:43 +02:00
Ross Lagerwall 5802fdf31f Issue 14359: Only use O_CLOEXEC in _posixmodule.c if it is defined. 
Based on patch from Hervé Coatanhay.
 2012-03-18 15:55:10 +02:00
Ross Lagerwall 7f4fdb266a Use ANSI C prototype instead of K&R style. 2012-03-07 20:06:33 +02:00
Benjamin Peterson 3ef2f8c296 merge 3.2 2012-01-22 20:04:58 -05:00
Benjamin Peterson 91eef984fd fix declaration style 2012-01-22 20:04:46 -05:00
Gregory P. Smith 08c1278ab8 Fix FreeBSD, NetBSD and OpenBSD behavior of the issue #8052 fix. 2012-01-21 21:06:22 -08:00
Gregory P. Smith 4842efcf97 Fix FreeBSD, NetBSD and OpenBSD behavior of the issue #8052 fix. 2012-01-21 21:01:24 -08:00
Gregory P. Smith d45382db0b bugfix for *BSD platforms. (oops messed up #define) 2012-01-21 15:20:37 -08:00