nix/tests/linux-sandbox.sh
Yorick van Pelt 58210e5306 Don't allow writing to /etc
(cherry picked from commit db41f74af3)
2023-02-14 15:50:29 +00:00

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source common.sh
needLocalStore "the sandbox only runs on the builder side, so it makes no sense to test it with the daemon"
clearStore
if ! canUseSandbox; then exit 99; fi
# Note: we need to bind-mount $SHELL into the chroot. Currently we
# only support the case where $SHELL is in the Nix store, because
# otherwise things get complicated (e.g. if it's in /bin, do we need
# /lib as well?).
if [[ ! $SHELL =~ /nix/store ]]; then exit 99; fi
chmod -R u+w $TEST_ROOT/store0 || true
rm -rf $TEST_ROOT/store0
export NIX_STORE_DIR=/my/store
export NIX_REMOTE=$TEST_ROOT/store0
outPath=$(nix-build dependencies.nix --no-out-link --sandbox-paths /nix/store)
[[ $outPath =~ /my/store/.*-dependencies ]]
nix path-info -r $outPath | grep input-2
nix store ls -R -l $outPath | grep foobar
nix store cat $outPath/foobar | grep FOOBAR
# Test --check without hash rewriting.
nix-build dependencies.nix --no-out-link --check --sandbox-paths /nix/store
# Test that sandboxed builds with --check and -K can move .check directory to store
nix-build check.nix -A nondeterministic --sandbox-paths /nix/store --no-out-link
(! nix-build check.nix -A nondeterministic --sandbox-paths /nix/store --no-out-link --check -K 2> $TEST_ROOT/log)
if grep -q 'error: renaming' $TEST_ROOT/log; then false; fi
grep -q 'may not be deterministic' $TEST_ROOT/log
# Test that sandboxed builds cannot write to /etc easily
(! nix-build -E 'with import ./config.nix; mkDerivation { name = "etc-write"; buildCommand = "echo > /etc/test"; }' --no-out-link --sandbox-paths /nix/store)