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Re: OpenVMS getdtablesize.c

From: Paul Eggert
Subject: Re: OpenVMS getdtablesize.c
Date: Wed, 28 Jun 2017 15:08:03 -0700
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.1.1

Bruno Haible wrote:
If I have a replacement getdtablesize() return 65535, that could cause
programs to assume that they could actually open that many descriptors.
This is only a theoretical risk. I know of no programs that are that

Although GNU 'sort' does something like that, it has code to deal with later 'open' failures due to EMFILE and/or ENFILE. Any program that allocates file descriptors that aggressively really needs to deal with 'open' failures that can occur regardless of what getdtablesize returns.

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