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Revert "Remove noop __zipos_postdup" (#974)

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`close` does not modify the fd table, so `rc` can potentially have a
stale zipos object sitting on it. As such, we need `__zipos_postdup`
there.
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Jōshin 2023-12-01 03:51:01 -05:00 committed by GitHub
parent 7845495a93
commit f0bfabba07
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1 changed files with 5 additions and 0 deletions
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5
libc/calls/fcntl.c
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@ -28,6 +28,7 @@
#include "libc/intrin/strace.internal.h"
#include "libc/intrin/weaken.h"
#include "libc/runtime/zipos.internal.h"
#include "libc/str/str.h"
#include "libc/sysv/consts/f.h"
#include "libc/sysv/errfuns.h"
@ -125,6 +126,10 @@ int fcntl(int fd, int cmd, ...) {
END_CANCELATION_POINT;
} else {
rc = sys_fcntl(fd, cmd, arg, __sys_fcntl);
if (rc != -1 && (cmd == F_DUPFD || cmd == F_DUPFD_CLOEXEC) &&
__isfdkind(rc, kFdZip)) {
_weaken(__zipos_postdup)(fd, rc);
}
}
} else {
rc = sys_fcntl_nt(fd, cmd, arg);