Merge "feat: unprivileged read-only open of SQLite DB" into main
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55350bd68d
1 changed files with 9 additions and 0 deletions
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@ -548,6 +548,15 @@ void LocalStore::openDB(State & state, bool create)
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sqlite3_exec(db, ("pragma main.journal_mode = " + mode + ";").c_str(), 0, 0, 0) != SQLITE_OK)
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SQLiteError::throw_(db, "setting journal mode");
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if (mode == "wal" ) {
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/* persist the WAL files when the DB connection is closed.
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* This allows for read-only connections without any write permissions
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* on the state directory to succeed on a closed database. */
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int enable = 1;
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if (sqlite3_file_control(db, NULL, SQLITE_FCNTL_PERSIST_WAL, &enable) != SQLITE_OK)
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SQLiteError::throw_(db, "setting persistent WAL mode");
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}
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/* Increase the auto-checkpoint interval to 40000 pages. This
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seems enough to ensure that instantiating the NixOS system
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derivation is done in a single fsync(). */
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