mirrors/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-11-01 18:51:43 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 21

gh-95023: Added os.setns and os.unshare functions (#95046)

Browse source 
Added os.setns and os.unshare to easily switch between namespaces
on Linux.

Co-authored-by: Christian Heimes <christian@python.org>
Co-authored-by: CAM Gerlach <CAM.Gerlach@Gerlach.CAM>
Co-authored-by: Victor Stinner <vstinner@python.org>
This commit is contained in:
Noam Cohen 2022-10-20 12:08:54 +03:00 • committed by GitHub
parent c1e02d4e4e
commit a371a7e03e
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
11 changed files with 418 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

107
Modules/posixmodule.c
View file

@ -8581,6 +8581,64 @@ os_pidfd_open_impl(PyObject *module, pid_t pid, unsigned int flags)
#endif
#ifdef HAVE_SETNS
/*[clinic input]
os.setns
fd: fildes
A file descriptor to a namespace.
nstype: int = 0
Type of namespace.
Move the calling thread into different namespaces.
[clinic start generated code]*/
static PyObject *
os_setns_impl(PyObject *module, int fd, int nstype)
/*[clinic end generated code: output=5dbd055bfb66ecd0 input=42787871226bf3ee]*/
{
int res;
Py_BEGIN_ALLOW_THREADS
res = setns(fd, nstype);
Py_END_ALLOW_THREADS
if (res != 0) {
return posix_error();
}
Py_RETURN_NONE;
}
#endif
#ifdef HAVE_UNSHARE
/*[clinic input]
os.unshare
flags: int
Namespaces to be unshared.
Disassociate parts of a process (or thread) execution context.
[clinic start generated code]*/
static PyObject *
os_unshare_impl(PyObject *module, int flags)
/*[clinic end generated code: output=1b3177906dd237ee input=9e065db3232b8b1b]*/
{
int res;
Py_BEGIN_ALLOW_THREADS
res = unshare(flags);
Py_END_ALLOW_THREADS
if (res != 0) {
return posix_error();
}
Py_RETURN_NONE;
}
#endif
#if defined(HAVE_READLINK) || defined(MS_WINDOWS)
/*[clinic input]
os.readlink
@ -14945,6 +15003,8 @@ static PyMethodDef posix_methods[] = {
OS__ADD_DLL_DIRECTORY_METHODDEF
OS__REMOVE_DLL_DIRECTORY_METHODDEF
OS_WAITSTATUS_TO_EXITCODE_METHODDEF
OS_SETNS_METHODDEF
OS_UNSHARE_METHODDEF
{NULL, NULL} /* Sentinel */
};
@ -15390,6 +15450,53 @@ all_ins(PyObject *m)
#ifdef SCHED_FX
if (PyModule_AddIntConstant(m, "SCHED_FX", SCHED_FSS)) return -1;
#endif
/* constants for namespaces */
#if defined(HAVE_SETNS) || defined(HAVE_UNSHARE)
#ifdef CLONE_FS
if (PyModule_AddIntMacro(m, CLONE_FS)) return -1;
#endif
#ifdef CLONE_FILES
if (PyModule_AddIntMacro(m, CLONE_FILES)) return -1;
#endif
#ifdef CLONE_NEWNS
if (PyModule_AddIntMacro(m, CLONE_NEWNS)) return -1;
#endif
#ifdef CLONE_NEWCGROUP
if (PyModule_AddIntMacro(m, CLONE_NEWCGROUP)) return -1;
#endif
#ifdef CLONE_NEWUTS
if (PyModule_AddIntMacro(m, CLONE_NEWUTS)) return -1;
#endif
#ifdef CLONE_NEWIPC
if (PyModule_AddIntMacro(m, CLONE_NEWIPC)) return -1;
#endif
#ifdef CLONE_NEWUSER
if (PyModule_AddIntMacro(m, CLONE_NEWUSER)) return -1;
#endif
#ifdef CLONE_NEWPID
if (PyModule_AddIntMacro(m, CLONE_NEWPID)) return -1;
#endif
#ifdef CLONE_NEWNET
if (PyModule_AddIntMacro(m, CLONE_NEWNET)) return -1;
#endif
#ifdef CLONE_NEWTIME
if (PyModule_AddIntMacro(m, CLONE_NEWTIME)) return -1;
#endif
#ifdef CLONE_SYSVSEM
if (PyModule_AddIntMacro(m, CLONE_SYSVSEM)) return -1;
#endif
#ifdef CLONE_THREAD
if (PyModule_AddIntMacro(m, CLONE_THREAD)) return -1;
#endif
#ifdef CLONE_SIGHAND
if (PyModule_AddIntMacro(m, CLONE_SIGHAND)) return -1;
#endif
#ifdef CLONE_VM
if (PyModule_AddIntMacro(m, CLONE_VM)) return -1;
#endif
#endif
#endif
#ifdef USE_XATTRS