diff options
Diffstat (limited to 'src/libexpr/primops.cc')
| -rw-r--r-- | src/libexpr/primops.cc | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/src/libexpr/primops.cc b/src/libexpr/primops.cc index 6b99b91e4..e2b1ac4f6 100644 --- a/src/libexpr/primops.cc +++ b/src/libexpr/primops.cc @@ -1520,15 +1520,25 @@ static RegisterPrimOp primop_storePath({ static void prim_pathExists(EvalState & state, const PosIdx pos, Value * * args, Value & v) { + auto & arg = *args[0]; + /* We don’t check the path right now, because we don’t want to throw if the path isn’t allowed, but just return false (and we can’t just catch the exception here because we still want to - throw if something in the evaluation of `*args[0]` tries to + throw if something in the evaluation of `arg` tries to access an unauthorized path). */ - auto path = realisePath(state, pos, *args[0], { .checkForPureEval = false }); + auto path = realisePath(state, pos, arg, { .checkForPureEval = false }); + + /* SourcePath doesn't know about trailing slash. */ + auto mustBeDir = arg.type() == nString && arg.str().ends_with("/"); try { - v.mkBool(state.checkSourcePath(path).pathExists()); + auto checked = state.checkSourcePath(path); + auto exists = checked.pathExists(); + if (exists && mustBeDir) { + exists = checked.lstat().type == InputAccessor::tDirectory; + } + v.mkBool(exists); } catch (SysError & e) { /* Don't give away info from errors while canonicalising ‘path’ in restricted mode. */ |