max/nix-super
1
0
Fork 0
mirror of https://github.com/privatevoid-net/nix-super.git synced 2024-11-25 23:36:16 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

Detect symlink cycles

Browse source
This commit is contained in:
Eelco Dolstra 2022-05-18 23:09:12 +02:00
parent 593798b2a0
commit df713a5d25
No known key found for this signature in database
GPG key ID: 8170B4726D7198DE
2 changed files with 8 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
src/libfetchers/input-accessor.cc
View file

@ -289,10 +289,14 @@ SourcePath SourcePath::resolveSymlinks() const
{
CanonPath res("/");
int linksAllowed = 1024;
for (auto & component : path) {
res.push(component);
while (true) {
if (auto st = accessor.maybeLstat(res)) {
if (!linksAllowed--)
throw Error("infinite symlink recursion in path '%s'", path);
if (st->type != InputAccessor::tSymlink) break;
auto target = accessor.readLink(res);
if (hasPrefix(target, "/"))

4
tests/eval.sh
View file

@ -29,3 +29,7 @@ nix-instantiate --eval -E 'assert 1 + 2 == 3; true'
[[ $(nix-instantiate -A attr --eval "./eval.nix") == '{ foo = "bar"; }' ]]
[[ $(nix-instantiate -A attr --eval --json "./eval.nix") == '{"foo":"bar"}' ]]
[[ $(nix-instantiate -A int --eval - < "./eval.nix") == 123 ]]
# Check that symlink cycles don't cause a hang.
ln -sfn cycle.nix $TEST_ROOT/cycle.nix
(! nix eval --file $TEST_ROOT/cycle.nix)