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