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bug#51857: cross-filesystem copying broken on macOS with coreutils >= 9.

From: Paul Eggert
Subject: bug#51857: cross-filesystem copying broken on macOS with coreutils >= 9.0
Date: Mon, 15 Nov 2021 23:31:12 -0800
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.2.1

On 11/15/21 19:14, Sudhip Nashi wrote:
lseek(0x3, 0x0, 0x3)             = -1 Err#6

Oh my, it appears lseek (fd, 0, SEEK_HOLE) is failing with errno == ENXIO when the file has no holes, even though the Darwin man page clearly states that lseek should return the file size in that case (see <https://github.com/apple/darwin-xnu/blob/main/bsd/man/man2/lseek.2>). So, not only does macOS lseek disagree with all other implementations, it even disagrees with the Darwin documentation.

To work around this macOS problem I installed the attached further patch into Gnulib and propagated it into coreutils. Please try the latest coreutils version on Savannah, or you can simply run configure+make from the tarball that is temporarily at:


Attachment: 0001-lseek-port-around-macOS-SEEK_HOLE-glitch.patch
Description: Text Data

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