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SubjectRe: [PATCH] fcntl returns wrong error code
    > When fcntl(fd, F_DUPFD, b) is called where 'b' is greater than the
> maximum allowable value EINVAL should be returned. From POSIX:
>
> "[EINVAL] The cmd argument is invalid, or the cmd argument is F_DUPFD and
> arg is negative or greater than or equal to {OPEN_MAX}, or ..."

... Also we sort of have a problem since OPEN_MAX is not
a constant on Linux x86. I guess that means a libc enforced
behaviour or something for that bit

OPEN_MAX is described in the <limits.h> POSIX man page
as a runtime invariant constant. However, it is allowed
to be indeterminate, so no problems arise, I think.

Andries
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