Emulate POSIX_SPAWN_CLOEXEC_DEFAULT in fork/exec #79
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iCharlesHu
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| hi = getdtablesize(); | ||
| } | ||
| #else | ||
| int hi = 1024; |
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Where does '1024' come from and how safe is it to default to this vs making this #error and requiring a specific implementation for new platforms?
Also, the following additional platforms support getdtablesize: FreeBSD, OpenBSD, NetBSD, Solaris, QNX.
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Instead of #error, how about if I just call getdtablesize unconditionally here and have it naturally error on platforms that don't support it.
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FreeBSD PR #1698 adds support for POSIX O_CLOFORK, which could simplify this implementation. |
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Ahh thanks. Good to know. |
POSIX_SPAWN_CLOEXEC_DEFAULT is only available on Darwin. Emulate POSIX_SPAWN_CLOEXEC_DEFAULT on other platforms by calling close after fork, before exec. This commit also removes _subprocess_posix_spawn_fallback because we can't emulate POSIX_SPAWN_CLOEXEC_DEFAULT in a thread-safe manner while using posix_spawn.
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POSIX_SPAWN_CLOEXEC_DEFAULT is only available on Darwin. Emulate POSIX_SPAWN_CLOEXEC_DEFAULT on other platforms by calling close after fork, before exec.
This commit also removes _subprocess_posix_spawn_fallback because we can't emulate POSIX_SPAWN_CLOEXEC_DEFAULT in a thread-safe manner while using posix_spawn.
Resolves: #46