45 lines
972 B
Go
45 lines
972 B
Go
package main
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import (
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"fmt"
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"strconv"
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"strings"
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)
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// TopOutput represents data from 'top' command output
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// for single process.
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type TopOutput struct {
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CPU float64
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}
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// NewTopOutput creates new TopOutput from raw stdout data.
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func NewTopOutput(data string) (*TopOutput, error) {
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fields := parseTopOutput(data)
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if len(fields) < 11 {
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fmt.Println("[ERROR]: wrong top output", fields)
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return nil, ErrParse
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}
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// eithh field is supposed to be CPU value
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cpu, err := strconv.ParseFloat(fields[8], 64)
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if err != nil {
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// top output might be different from system to system, so log
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// this verbosely
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fmt.Println("[ERROR] Parse CPU value:", err)
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fmt.Println("Output:", fields)
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return nil, ErrParse
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}
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return &TopOutput{
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CPU: cpu,
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}, nil
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}
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func parseTopOutput(data string) []string {
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lines := strings.Split(data, "\r")
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line := strings.Replace(lines[0], "\r", "", -1)
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line = strings.TrimSpace(line)
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fields := strings.Fields(line)
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return fields
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}
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