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560cf66454
- Move pidtree to its own module and disaggregate it into tree, walker and reporter. - Extend testing for probe/process - Extend process metadata; add command line & # threads.
35 lines
661 B
Go
35 lines
661 B
Go
package process
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import (
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"fmt"
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)
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// Tree represents all processes on the machine.
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type Tree interface {
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GetParent(pid int) (int, error)
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}
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type tree struct {
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processes map[int]*Process
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}
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// NewTree returns a new Tree that can be polled.
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func NewTree(procRoot string) (Tree, error) {
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pt := tree{processes: map[int]*Process{}}
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err := Walk(procRoot, func(p *Process) {
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pt.processes[p.PID] = p
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})
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return &pt, err
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}
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// GetParent returns the pid of the parent process for a given pid
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func (pt *tree) GetParent(pid int) (int, error) {
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proc, ok := pt.processes[pid]
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if !ok {
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return -1, fmt.Errorf("PID %d not found", pid)
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}
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return proc.PPID, nil
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}
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