71 lines
1.6 KiB
Go
71 lines
1.6 KiB
Go
package prog
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import (
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"encoding/xml"
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"os/exec"
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"strconv"
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"strings"
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)
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// ProcessList is a map of processes' statuses.
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type ProcessList map[string]bool
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// NewProcessList returns a ProcessList with initialised map.
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func NewProcessList() *ProcessList {
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pl := make(ProcessList)
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return &pl
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}
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// AddProcess appends a process to a ProcessList
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func (pl *ProcessList) AddProcess(name string, isup bool) {
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(*pl)[name] = isup
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}
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// ProcessXMLEntry is a XML representation of a process stored in ProcessList.
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type ProcessXMLEntry struct {
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XMLName xml.Name
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Name string `xml:"name,attr"`
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IsUp bool `xml:",chardata"`
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}
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// MarshalXML implements Marshaler interface for a ProcessList.
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func (l ProcessList) MarshalXML(e *xml.Encoder, start xml.StartElement) error {
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if len(l) == 0 {
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return nil
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}
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if err := e.EncodeToken(start); err != nil {
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return err
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}
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for key, val := range l {
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e.Encode(ProcessXMLEntry{
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XMLName: xml.Name{Local: "Process"},
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Name: key,
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IsUp: val})
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}
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return e.EncodeToken(start.End())
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}
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// IsProcessUp returns true if process is up, and a list of PIDs for
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// that process name. Uses pgrep to get PID of a process and if
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// a process is not working, then pgrep returns nothing.
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func IsProcessUp(name string) (bool, []int, error) {
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out, err := exec.Command("pgrep", "-f", name).Output()
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if err != nil || len(out) < 2 {
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return false, nil, err
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}
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spids := strings.Split(string(out[:len(out)-1]), "\n")
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pids := make([]int, len(spids))
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for i, v := range spids {
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pids[i], err = strconv.Atoi(v)
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if err != nil {
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return false, nil, nil
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}
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}
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return true, pids, nil
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}
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