73 lines
1.8 KiB
Go
73 lines
1.8 KiB
Go
// +build freebsd darwin
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package widgets
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import (
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"fmt"
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"log"
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"os/exec"
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"strconv"
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"strings"
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)
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const (
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// Define column widths for ps output used in Processes()
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five = "12345"
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ten = five + five
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fifty = ten + ten + ten + ten + ten
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)
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func (self *Proc) update() {
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processes, err := Processes()
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if err != nil {
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log.Printf("failed to retrieve processes: %v", err)
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return
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}
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// have to iterate like this in order to actually change the value
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for i := range processes {
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processes[i].CPU /= self.cpuCount
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}
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self.ungroupedProcs = processes
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self.groupedProcs = Group(processes)
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self.Sort()
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}
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func Processes() ([]Process, error) {
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keywords := fmt.Sprintf("pid=%s,comm=%s,pcpu=%s,pmem=%s,args", ten, fifty, five, five)
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output, err := exec.Command("ps", "-caxo", keywords).Output()
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if err != nil {
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return nil, fmt.Errorf("failed to execute 'ps' command: %v", err)
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}
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// converts to []string and removes the header
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strOutput := strings.Split(strings.TrimSpace(string(output)), "\n")[1:]
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processes := []Process{}
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for _, line := range strOutput {
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pid, err := strconv.Atoi(strings.TrimSpace(line[0:10]))
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if err != nil {
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log.Printf("failed to convert first field to int: %v. split: %v", err, line)
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}
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cpu, err := strconv.ParseFloat(strings.TrimSpace(line[63:68]), 64)
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if err != nil {
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log.Printf("failed to convert third field to float: %v. split: %v", err, line)
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}
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mem, err := strconv.ParseFloat(strings.TrimSpace(line[69:74]), 64)
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if err != nil {
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log.Printf("failed to convert fourth field to float: %v. split: %v", err, line)
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}
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process := Process{
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PID: pid,
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Command: strings.TrimSpace(line[11:61]),
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CPU: cpu,
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Mem: mem,
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Args: line[74:],
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}
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processes = append(processes, process)
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}
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return processes, nil
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}
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