Merge bitcoin/bitcoin#22591: Util: error if settings json exists, but is unreadable

2b071265c37da22f15769945fd159b50a14792a3 error if settings.json exists, but is unreadable (Tyler Chambers)

Pull request description:

  If settings.json exists, but is unreadable, we should error instead of overwriting.

  Fixes #22571

ACKs for top commit:
  Zero-1729:
    tACK 2b071265c37da22f15769945fd159b50a14792a3
  ShaMan239:
    tACK 2b071265c37da22f15769945fd159b50a14792a3
  prayank23:
    tACK 2b071265c3
  ryanofsky:
    Code review ACK 2b071265c37da22f15769945fd159b50a14792a3. Thanks for the fix! Note that PR   https://github.com/bitcoin-core/gui/pull/379 will change the appearance of dialogs shown in screenshots above. So it could be interesting to test the two PRs together (but current testing seems more than sufficient)
  theStack:
    ACK 2b071265c37da22f15769945fd159b50a14792a3 📁

Tree-SHA512: 6f7f96ce8a13213d0335198a2245d127264495c877105058d1503252435915b332a6e55068ac21088f4c0c017d564689f4956213328d5bdee81d73711efc5511
This commit is contained in:
MarcoFalke 2021-09-05 17:12:35 +02:00 committed by pasta
parent 2966452a1b
commit ab4405258e
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@ -60,9 +60,15 @@ bool ReadSettings(const fs::path& path, std::map<std::string, SettingsValue>& va
values.clear();
errors.clear();
// Ok for file to not exist
if (!fs::exists(path)) return true;
fsbridge::ifstream file;
file.open(path);
if (!file.is_open()) return true; // Ok for file not to exist.
if (!file.is_open()) {
errors.emplace_back(strprintf("%s. Please check permissions.", path.string()));
return false;
}
SettingsValue in;
if (!in.read(std::string{std::istreambuf_iterator<char>(file), std::istreambuf_iterator<char>()})) {