Issue #7242: On Solaris 9 and earlier calling os.fork() from within a
thread could raise an incorrect RuntimeError about not holding the import
lock. The import lock is now reinitialized after fork.
diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c
index 46053fe..45128d3 100644
--- a/Modules/posixmodule.c
+++ b/Modules/posixmodule.c
@@ -3605,14 +3605,18 @@
posix_fork1(PyObject *self, PyObject *noargs)
{
pid_t pid;
- int result;
+ int result = 0;
_PyImport_AcquireLock();
pid = fork1();
- result = _PyImport_ReleaseLock();
+ if (pid == 0) {
+ /* child: this clobbers and resets the import lock. */
+ PyOS_AfterFork();
+ } else {
+ /* parent: release the import lock. */
+ result = _PyImport_ReleaseLock();
+ }
if (pid == -1)
return posix_error();
- if (pid == 0)
- PyOS_AfterFork();
if (result < 0) {
/* Don't clobber the OSError if the fork failed. */
PyErr_SetString(PyExc_RuntimeError,
@@ -3634,14 +3638,18 @@
posix_fork(PyObject *self, PyObject *noargs)
{
pid_t pid;
- int result;
+ int result = 0;
_PyImport_AcquireLock();
pid = fork();
- result = _PyImport_ReleaseLock();
+ if (pid == 0) {
+ /* child: this clobbers and resets the import lock. */
+ PyOS_AfterFork();
+ } else {
+ /* parent: release the import lock. */
+ result = _PyImport_ReleaseLock();
+ }
if (pid == -1)
return posix_error();
- if (pid == 0)
- PyOS_AfterFork();
if (result < 0) {
/* Don't clobber the OSError if the fork failed. */
PyErr_SetString(PyExc_RuntimeError,
@@ -3759,11 +3767,12 @@
_PyImport_AcquireLock();
pid = forkpty(&master_fd, NULL, NULL, NULL);
+ if (pid == 0)
+ PyOS_AfterFork();
+
result = _PyImport_ReleaseLock();
if (pid == -1)
return posix_error();
- if (pid == 0)
- PyOS_AfterFork();
if (result < 0) {
/* Don't clobber the OSError if the fork failed. */
PyErr_SetString(PyExc_RuntimeError,