| 1 | //go:build !windows |
| 2 | |
| 3 | package proc |
| 4 | |
| 5 | import ( |
| 6 | "bufio" |
| 7 | "errors" |
| 8 | "os/exec" |
| 9 | "strconv" |
| 10 | "strings" |
| 11 | "syscall" |
| 12 | "testing" |
| 13 | "time" |
| 14 | ) |
| 15 | |
| 16 | func TestSetProcessGroupKillDetachesSession(t *testing.T) { |
| 17 | cmd := exec.Command("true") |
| 18 | SetProcessGroupKill(cmd) |
| 19 | if cmd.SysProcAttr == nil { |
| 20 | t.Fatal("SysProcAttr is nil") |
| 21 | } |
| 22 | if !cmd.SysProcAttr.Setsid { |
| 23 | t.Fatal("SetProcessGroupKill should detach the child into a new session") |
| 24 | } |
| 25 | } |
| 26 | |
| 27 | func TestKillTreeTerminatesChild(t *testing.T) { |
| 28 | cmd := exec.Command("sleep", "30") |
| 29 | if err := cmd.Start(); err != nil { |
| 30 | t.Fatalf("Start: %v", err) |
| 31 | } |
| 32 | |
| 33 | KillTree(cmd) |
| 34 | |
| 35 | done := make(chan error, 1) |
| 36 | go func() { done <- cmd.Wait() }() |
| 37 | select { |
| 38 | case <-done: |
| 39 | case <-time.After(5 * time.Second): |
| 40 | t.Fatal("cmd.Wait blocked after KillTree") |
| 41 | } |
| 42 | } |
| 43 | |
| 44 | func TestKillTrackedTerminatesChild(t *testing.T) { |
| 45 | cmd := exec.Command("sleep", "30") |
| 46 | job, err := StartTracked(cmd) |
| 47 | if err != nil { |
| 48 | t.Fatalf("StartTracked: %v", err) |
| 49 | } |
| 50 | if job != 0 { |
| 51 | t.Fatalf("StartTracked job = %d off Windows; want 0", job) |
| 52 | } |
| 53 | |
| 54 | KillTracked(cmd, job) |
| 55 | |
| 56 | done := make(chan error, 1) |
| 57 | go func() { done <- cmd.Wait() }() |
| 58 | select { |
| 59 | case <-done: |
| 60 | case <-time.After(5 * time.Second): |
| 61 | t.Fatal("cmd.Wait blocked after KillTracked") |
| 62 | } |
| 63 | } |
| 64 | |
| 65 | // A launcher (sh) that backgrounds a grandchild (sleep) and stays alive: with |
| 66 | // the child in its own process group, KillTracked's negative-pid kill must reap |
| 67 | // the grandchild too, not just sh. |
| 68 | func TestKillTrackedReapsProcessGroupGrandchild(t *testing.T) { |
| 69 | cmd := exec.Command("sh", "-c", "sleep 60 & echo $!; wait") |
| 70 | stdout, err := cmd.StdoutPipe() |
| 71 | if err != nil { |
| 72 | t.Fatalf("StdoutPipe: %v", err) |
| 73 | } |
| 74 | if _, err := StartTracked(cmd); err != nil { |
| 75 | t.Fatalf("StartTracked: %v", err) |
| 76 | } |
| 77 | |
| 78 | line, err := bufio.NewReader(stdout).ReadString('\n') |
| 79 | if err != nil { |
| 80 | t.Fatalf("read grandchild pid: %v", err) |
| 81 | } |
| 82 | gcPid, err := strconv.Atoi(strings.TrimSpace(line)) |
| 83 | if err != nil || gcPid <= 0 { |
| 84 | t.Fatalf("bad grandchild pid %q: %v", line, err) |
| 85 | } |
| 86 | if syscall.Kill(gcPid, 0) != nil { |
| 87 | t.Fatalf("grandchild %d not alive before kill", gcPid) |
| 88 | } |
| 89 | |
| 90 | KillTracked(cmd, 0) |
| 91 | _ = cmd.Wait() |
| 92 | |
| 93 | deadline := time.Now().Add(5 * time.Second) |
| 94 | for !errors.Is(syscall.Kill(gcPid, 0), syscall.ESRCH) { |
| 95 | if time.Now().After(deadline) { |
| 96 | t.Fatalf("grandchild %d survived KillTracked — process group not reaped", gcPid) |
| 97 | } |
| 98 | time.Sleep(20 * time.Millisecond) |
| 99 | } |
| 100 | } |
| 101 |