d2dbb8c963
* cli: initial work on debug; server-status target * debug: add metrics capture target (#7376) * check against DR secondary * debug: add compression * refactor check into preflight func * debug: set short test time on tests, fix exit code bug * debug: use temp dir for output on tests * debug: use mholt/archiver for compression * first pass on adding pprof * use logger for output * refactor polling target capture logic * debug: poll and collect replication status * debug: poll and collect host-info; rename output files and collection refactor * fix comments * add archive test; fix bugs found * rename flag name to singular target * add target output test; scaffold other tests cases * debug/test: add pprof and index file tests * debug/test: add min timing check tests * debug: fix index gen race and collection goroutine race * debug: extend archive tests, handle race between program exit and polling goroutines * update docstring * debug: correctly add to pollingWg * debug: add config target support * debug: don't wait on interrupt shutdown; add file exists unit tests * move pprof bits into its goroutine * debug: skip empty metrics and some pprof file creation if permission denied, add matching unit test * address comments and feedback * Vault debug using run.Group (#7658) * debug: switch to use oklog/run.Group * debug: use context to cancel requests and interrupt rungroups. * debug: trigger the first interval properly * debug: metrics collection should use metrics interval * debug: add missing continue on metrics error * debug: remove the use of buffered chan to trigger first interval * debug: don't shadow BaseCommand's client, properly block on interval capture failures * debug: actually use c.cachedClient everywhere * go mod vendor * debug: run all pprof in goroutines; bump pprof timings in tests to reduce flakiness * debug: update help text
38 lines
937 B
Go
38 lines
937 B
Go
// Copyright 2014-2017 Ulrich Kunitz. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package lzma
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import (
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"errors"
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"io"
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)
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// ErrLimit indicates that the limit of the LimitedByteWriter has been
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// reached.
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var ErrLimit = errors.New("limit reached")
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// LimitedByteWriter provides a byte writer that can be written until a
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// limit is reached. The field N provides the number of remaining
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// bytes.
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type LimitedByteWriter struct {
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BW io.ByteWriter
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N int64
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}
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// WriteByte writes a single byte to the limited byte writer. It returns
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// ErrLimit if the limit has been reached. If the byte is successfully
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// written the field N of the LimitedByteWriter will be decremented by
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// one.
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func (l *LimitedByteWriter) WriteByte(c byte) error {
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if l.N <= 0 {
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return ErrLimit
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}
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if err := l.BW.WriteByte(c); err != nil {
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return err
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}
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l.N--
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return nil
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}
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