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| author | Eelco Dolstra <edolstra@gmail.com> | 2017-03-31 18:12:01 +0200 |
|---|---|---|
| committer | Eelco Dolstra <edolstra@gmail.com> | 2017-03-31 18:20:19 +0200 |
| commit | 29d35805c63f316aa19b33a481f953ca332d9b65 (patch) | |
| tree | b41a39a3a8641d926063b4e7dee68d7cdf25d448 /src/nix/command.cc | |
| parent | 3ecb09a40a8500d1052b087295b589ca4856fd7a (diff) | |
Sandbox: Fix /dev/ptmx on recent kernels
This fixes "No such file or directory" when opening /dev/ptmx
(e.g. http://hydra.nixos.org/build/51094249).
The reason appears to be some changes to /dev/ptmx / /dev/pts handling
between Linux 4.4 and 4.9. See
https://patchwork.kernel.org/patch/7832531/.
The fix is to go back to mounting a proper /dev/pts instance inside
the sandbox. Happily, this now works inside user namespaces, even for
unprivileged users. So
NIX_REMOTE=local?root=/tmp/nix nix-build \
'<nixpkgs/nixos/tests/misc.nix>' -A test
works for non-root users.
The downside is that the fix breaks sandbox builds on older kernels
(probably pre-4.6), since mounting a devpts fails inside user
namespaces for some reason I've never been able to figure out. Builds
on those systems will fail with
error: while setting up the build environment: mounting /dev/pts: Invalid argument
Ah well.
Diffstat (limited to 'src/nix/command.cc')
0 files changed, 0 insertions, 0 deletions