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Merge bitcoin/bitcoin#21907: wallet: Do not iterate a directory if having an error while accessing it

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29c9e2c2d2015ade47ed4497926363dea3f9c59b wallet: Do not iterate a directory if having an error while accessing it (Hennadii Stepanov)

Pull request description:

  On Windows when `ListDatabases` tries to iterate any system folder, e.g., "System Volume Information", it falls into an infinite loop.

  This PR fixes this bug. Now the `debug.log` contains:
  ```
  2021-05-12T09:07:53Z ListDatabases: Access is denied D:/System Volume Information -- skipping.
  ```

  An easy way to reproduce the bug and test this PR is to pass the `-walletdir=D:\` command-line option, and run the `listwalletdir` RPC, or File -> Open Wallet in the GUI menu.

  Fixes #20081.
  Fixes #21136.
  Fixes #21904.

  Also https://bitcoin.stackexchange.com/questions/99243/listwalletdir-access-is-denied-d-system-volume-information

ACKs for top commit:
  prayank23:
    ACK 29c9e2c2d2
  promag:
    Code review ACK 29c9e2c2d2015ade47ed4497926363dea3f9c59b.
  meshcollider:
    Code review ACK 29c9e2c2d2015ade47ed4497926363dea3f9c59b

Tree-SHA512: b851c88e6d09626f4cb81acc2fa59a563b2aee64582963285715bf785c64b872e8bf738aa6b27bdbaf4c3e5c8565c2dc2c802135f9aa1f48b4b913435bc5d793
This commit is contained in:
Samuel Dobson 2021-05-13 21:06:48 +12:00 committed by pasta
parent 6ed514647f
commit dc1f37e51a
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GPG Key ID: 52527BEDABE87984
1 changed files with 6 additions and 1 deletions
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7
src/wallet/db.cpp
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@ -18,7 +18,12 @@ std::vector<fs::path> ListDatabases(const fs::path& wallet_dir)
for (auto it = fs::recursive_directory_iterator(wallet_dir, ec); it != fs::recursive_directory_iterator(); it.increment(ec)) {
if (ec) {
LogPrintf("%s: %s %s\n", __func__, ec.message(), it->path().string());
if (fs::is_directory(*it)) {
it.no_push();
LogPrintf("%s: %s %s -- skipping.\n", __func__, ec.message(), it->path().string());
} else {
LogPrintf("%s: %s %s\n", __func__, ec.message(), it->path().string());
}
continue;
}