ITWorx Pulse release export
bd774932d5
Public source validation / validate (push) Failing after 3m8s
68 lines
1.7 KiB
Go
68 lines
1.7 KiB
Go
package hostcollect
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import (
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"io"
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"os"
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"strconv"
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"strings"
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)
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// readLimited reads at most limit bytes from path. Every /proc file the collector
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// touches is small, but /proc is a kernel interface and a bounded read keeps a
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// pathological or hostile file from becoming an unbounded allocation.
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func readLimited(path string, limit int64) ([]byte, error) {
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file, err := os.Open(path) //nolint:gosec // paths are derived from the configured procfs root
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if err != nil {
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return nil, err
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}
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defer func() { _ = file.Close() }()
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data, err := io.ReadAll(io.LimitReader(file, limit))
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if err != nil {
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return nil, err
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}
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return data, nil
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}
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func readTrimmed(path string, limit int64) (string, error) {
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data, err := readLimited(path, limit)
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if err != nil {
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return "", err
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}
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return strings.TrimSpace(string(data)), nil
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}
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// parseUint accepts the decimal unsigned values procfs uses and reports failure
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// instead of guessing, so a malformed line degrades one field rather than producing a
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// plausible-looking zero.
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func parseUint(value string) (uint64, bool) {
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parsed, err := strconv.ParseUint(strings.TrimSpace(value), 10, 64)
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if err != nil {
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return 0, false
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}
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return parsed, true
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}
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func parseFloat(value string) (float64, bool) {
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parsed, err := strconv.ParseFloat(strings.TrimSpace(value), 64)
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if err != nil {
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return 0, false
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}
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return parsed, true
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}
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func truncate(value string, max int) string {
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if len(value) > max {
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return value[:max]
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}
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return value
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}
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// lines splits procfs content without allocating a scanner per file.
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func lines(data []byte) []string {
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text := strings.TrimRight(string(data), "\n")
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if text == "" {
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return nil
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}
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return strings.Split(text, "\n")
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}
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