error while preallocating on nfs

[xaverdh]

I get the following error message while running nix run --store $HOME/.nix -f channel:nixpkgs-unstable hello -c hello:

error: preallocating file of 12044580 bytes: Not supported

I am running a static nix binary compiled from NixOS/nixpkgs#56281, with the setup according to https://matthewbauer.us/blog/static-nix.html.

I think the problem may be that the nfs filesystem in question does not implement posix_fallocate (properly).
But the errno is not what the code at

nix/src/libutil/archive.cc

Line 334 in 44e8630

if (errno && errno != EINVAL)

expects.

Is there any chance this can be made more robust?

[dtzWill]

To address this sort of thing I've been using this change for quite some time:

98b8c0b

I encountered this when using musl (and perhaps NFS as well), and remember it as a known intentional difference in behavior vs. glibc. This mailing list thread touches on some of this at least:

https://www.openwall.com/lists/musl/2018/04/26/3

See also:

https://www.openwall.com/lists/musl/2017/06/12/9

[xaverdh]

Thanks for the quick reply! I will try that patch.
Any chance that this will get upstreamed?

[edolstra]

@dtzWill Thanks, I've applied your patch.