mirror of
https://github.com/ceph/ceph-csi.git
synced 2025-03-10 01:19:29 +00:00
f87d06ed85
Several packages are only used while running the e2e suite. These packages are less important to update, as the they can not influence the final executable that is part of the Ceph-CSI container-image. By moving these dependencies out of the main Ceph-CSI go.mod, it is easier to identify if a reported CVE affects Ceph-CSI, or only the testing (like most of the Kubernetes CVEs). Signed-off-by: Niels de Vos <ndevos@ibm.com>
63 lines
1.6 KiB
Go
63 lines
1.6 KiB
Go
/*
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Copyright 2024 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package logs
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import (
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"bytes"
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"io"
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)
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// blockSize is the block size used in tail.
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const blockSize = 1024
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// findTailLineStartIndex returns the start of last nth line.
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// * If n < 0, return the beginning of the file.
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// * If n >= 0, return the beginning of last nth line.
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// Notice that if the last line is incomplete (no end-of-line), it will not be counted
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// as one line.
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func findTailLineStartIndex(f io.ReadSeeker, n int64) (int64, error) {
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if n < 0 {
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return 0, nil
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}
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size, err := f.Seek(0, io.SeekEnd)
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if err != nil {
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return 0, err
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}
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var left, cnt int64
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buf := make([]byte, blockSize)
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for right := size; right > 0 && cnt <= n; right -= blockSize {
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left = right - blockSize
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if left < 0 {
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left = 0
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buf = make([]byte, right)
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}
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if _, err := f.Seek(left, io.SeekStart); err != nil {
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return 0, err
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}
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if _, err := f.Read(buf); err != nil {
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return 0, err
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}
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cnt += int64(bytes.Count(buf, eol))
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}
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for ; cnt > n; cnt-- {
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idx := bytes.Index(buf, eol) + 1
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buf = buf[idx:]
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left += int64(idx)
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}
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return left, nil
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}
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