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bpo-47151: Fallback to fork when vfork fails in subprocess. (GH-32186)

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bpo-47151: Fallback to fork when vfork fails in subprocess. An OS kernel can specifically decide to disallow vfork() in a process. No need for that to prevent us from launching subprocesses.
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Gregory P. Smith 2022-03-31 13:42:28 -07:00 • committed by GitHub
parent e7bb7c2f04
commit 4a08c4c469
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6
Modules/_posixsubprocess.c
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@ -685,6 +685,12 @@ do_fork_exec(char *const exec_array[],
assert(preexec_fn == Py_None);
pid = vfork();
if (pid == -1) {
/* If vfork() fails, fall back to using fork(). When it isn't
* allowed in a process by the kernel, vfork can return -1
* with errno EINVAL. https://bugs.python.org/issue47151. */
pid = fork();
}
} else
#endif
{