Date: Fri, 2 Apr 2010 11:53:09 -0700 From: Artem Belevich <fbsdlist@src.cx> To: FreeBSD Hackers <freebsd-hackers@freebsd.org> Subject: write(2) size is limited by INT_MAX on amd64 -- is it a bug or a feature? Message-ID: <v2qed91d4a81004021153ka44d4bc8k5483145ba887f587@mail.gmail.com>
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Hi, I've ran into a problem on 8-stable/amd64 today. Basically any attempt to pass 2GB chunk of data to write(2) returns EINVAL. It looks like we're limiting amount of data to be written to INT_MAX which looks rather restrictive on LP64 platforms. NetBSD/OpenBSD do use SSIZE_MAX which does seem to be the limit specified by POSIX, if I'm looking at the correct specification here http://www.opengroup.org/onlinepubs/000095399/functions/write.html A bit of googling shows that this issue was also recently mentioned on svn-src-all: http://www.mail-archive.com/svn-src-all@freebsd.org/msg18266.html Was the INT_MAX limit in FreeBSD imposed intentionally, even on 64-bit platforms or is it a bug that needs fixing? Thanks, --Artem
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