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- stdout logger: release mutex while waiting on pause resume so prompt
callbacks can log (fixes hang after trusting new hosts; known_hosts
was written but Resume never ran).
- known hosts callback: stop borrowing the SSH dial throttle channel
(could block or interact badly with parallel handshakes).
- host key path: use errors.Is(..., fs.ErrNotExist) for RootedPath.Stat
wrapped errors; stat errors now fail fast instead of mis-read.
- public key path: same ErrNotExist check for authorized_keys miss.
- Build: optional DTAIL_NO_ZSTD=yes / nozstd tag for CGO-free builds;
split zstd readers into tagged files.
- Docs/examples: firewalld note for port 2222, log prune timer+script,
SSHBindAddress note, dserver unit disabled-by-default comment;
firewalld helper script example.
- Regression test for stdout pause/mutex behavior.
Made-with: Cursor
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This commit adds two major features and fixes:
1. SSH Agent Key Selection:
- Add --agentKeyIndex flag to select specific SSH agent key (0-based)
- Solves "too many authentication failures" with multiple SSH keys
- Default -1 uses all keys (backwards compatible)
- Available in dtail, dcat, dgrep, dmap commands
2. MapReduce Outfile Fixes:
- CSV files now written at every interval, not just on exit
- Proper signal handling (SIGTERM/SIGINT) with graceful shutdown
- 5-second grace period for cleanup before force exit
- Fixes issue where outfile remained as .tmp during execution
Usage:
dtail --servers host --agentKeyIndex 0 --query '...' outfile results.csv
This is particularly useful with YubiKey/hardware tokens where many
keys are loaded in the SSH agent, and for monitoring MapReduce results
in real-time as they're computed.
Co-authored-by: Cursor <cursoragent@cursor.com>
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- Add explicit interface satisfaction checks (var _ Interface = (*Type)(nil)) for compile-time verification:
- TurboWriter implementations (DirectTurboWriter, TurboChannelWriter)
- Processor implementations (GrepLineProcessor, ChannellessLineProcessor)
- Parser implementations (genericParser, csvParser, genericKVParser, custom parsers, mimecastParser)
- Logger implementations (file, stdout)
- Handler implementations (ServerHandler, ClientHandler)
- Connector implementations (Serverless, ServerConnection)
- SSH callback implementations (KnownHostsCallback)
- Improve error handling with context wrapping (%w):
- SSH operations: GeneratePrivateRSAKey, Agent
- Query parsing: Query.parse
- SSH client connections: dial, session, handle methods
- Fix receiver consistency:
- Convert Query.String() from value to pointer receiver
- Convert Outfile.String() from value to pointer receiver
- Convert all KnownHostsCallback methods to pointer receivers
- Convert mapCommand.Start() to pointer receiver
- Reorganize file structure for better clarity:
- internal/io/dlog/dlog.go: Move type definition before public functions
- internal/mapr/token.go: Reorganize helper functions after public ones
- Add documentation comments:
- Query.String() method
- Outfile.String() method
- Regex.String() method
- Improve config variable documentation
All unit tests and integration tests pass.
Amp-Thread-ID: https://ampcode.com/threads/T-019c0b08-0eeb-705d-a1f7-31bb764b659a
Co-authored-by: Amp <amp@ampcode.com>
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packages for logging
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this is useful for running unit and integration tests in jenkins
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logger package rewrite as dlog
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