| 1 | //go:build linux |
| 2 | |
| 3 | package host |
| 4 | |
| 5 | import ( |
| 6 | "errors" |
| 7 | "os" |
| 8 | "path/filepath" |
| 9 | "strconv" |
| 10 | "testing" |
| 11 | ) |
| 12 | |
| 13 | func rev3HoldTarget(t *testing.T, fx *writersKernelFixture, pid, fd int, target string) { |
| 14 | t.Helper() |
| 15 | dir := filepath.Join(fx.proc, strconv.Itoa(pid), "task", strconv.Itoa(pid), "fd") |
| 16 | if err := os.MkdirAll(dir, 0o700); err != nil { |
| 17 | t.Fatal(err) |
| 18 | } |
| 19 | if err := os.Symlink(target, filepath.Join(dir, strconv.Itoa(fd))); err != nil { |
| 20 | t.Fatal(err) |
| 21 | } |
| 22 | } |
| 23 | |
| 24 | func TestRev3NoProcessCoversDeletedDatabaseAndWAL(t *testing.T) { |
| 25 | for _, suffix := range []string{"", "-wal"} { |
| 26 | t.Run(suffix, func(t *testing.T) { |
| 27 | fx := newWritersKernelFixture(t) |
| 28 | fx.dropAgentHolds(t) |
| 29 | target := fx.db + suffix |
| 30 | for _, path := range []string{fx.db, fx.db + "-wal"} { |
| 31 | if err := os.Remove(path); err != nil { |
| 32 | t.Fatal(err) |
| 33 | } |
| 34 | } |
| 35 | rev3HoldTarget(t, fx, 31, 8, target+" (deleted)") |
| 36 | if _, err := fx.noProcess(t, false); err == nil { |
| 37 | t.Fatalf("deleted holder passed: %v", err) |
| 38 | } |
| 39 | }) |
| 40 | } |
| 41 | } |
| 42 | |
| 43 | func TestRev3NoProcessCoversNestedInstallationFiles(t *testing.T) { |
| 44 | fx := newWritersKernelFixture(t) |
| 45 | fx.dropAgentHolds(t) |
| 46 | nested := filepath.Join(filepath.Dir(fx.db), "sqlite", "scratch.db") |
| 47 | if err := os.MkdirAll(filepath.Dir(nested), 0o700); err != nil { |
| 48 | t.Fatal(err) |
| 49 | } |
| 50 | if err := os.WriteFile(nested, nil, 0o600); err != nil { |
| 51 | t.Fatal(err) |
| 52 | } |
| 53 | rev3HoldTarget(t, fx, 32, 9, nested) |
| 54 | if _, err := fx.noProcess(t, false); !errors.Is(err, ErrClaimStopIdentity) { |
| 55 | t.Fatalf("nested holder passed: %v", err) |
| 56 | } |
| 57 | } |
| 58 | |
| 59 | func TestRev3NoProcessScansWhenInstallationDirectoryIsEmpty(t *testing.T) { |
| 60 | fx := newWritersKernelFixture(t) |
| 61 | fx.dropAgentHolds(t) |
| 62 | if err := os.Remove(fx.db); err != nil { |
| 63 | t.Fatal(err) |
| 64 | } |
| 65 | if err := os.Remove(fx.db + "-wal"); err != nil { |
| 66 | t.Fatal(err) |
| 67 | } |
| 68 | target := filepath.Join(filepath.Dir(fx.db), "gone.db") |
| 69 | rev3HoldTarget(t, fx, 33, 10, target+" (deleted)") |
| 70 | if _, err := fx.noProcess(t, false); !errors.Is(err, ErrClaimStopIdentity) { |
| 71 | t.Fatalf("empty directory suppressed descriptor scan: %v", err) |
| 72 | } |
| 73 | } |
| 74 | |
| 75 | func TestRev3NoProcessPrefixHasPathBoundary(t *testing.T) { |
| 76 | fx := newWritersKernelFixture(t) |
| 77 | fx.dropAgentHolds(t) |
| 78 | sibling := filepath.Dir(fx.db) + "-old" |
| 79 | if err := os.Mkdir(sibling, 0o700); err != nil { |
| 80 | t.Fatal(err) |
| 81 | } |
| 82 | target := filepath.Join(sibling, "data.db") |
| 83 | if err := os.WriteFile(target, nil, 0o600); err != nil { |
| 84 | t.Fatal(err) |
| 85 | } |
| 86 | rev3HoldTarget(t, fx, 34, 11, target) |
| 87 | if _, err := fx.noProcess(t, false); err != nil { |
| 88 | t.Fatalf("prefix sibling matched: %v", err) |
| 89 | } |
| 90 | } |
| 91 | |
| 92 | func TestRev3NoProcessDescriptorScanErrorsFailClosed(t *testing.T) { |
| 93 | fx := newWritersKernelFixture(t) |
| 94 | fx.dropAgentHolds(t) |
| 95 | dir := filepath.Join(fx.proc, "35", "task", "35", "fd") |
| 96 | if err := os.MkdirAll(dir, 0o700); err != nil { |
| 97 | t.Fatal(err) |
| 98 | } |
| 99 | if err := os.WriteFile(filepath.Join(dir, "12"), nil, 0o600); err != nil { |
| 100 | t.Fatal(err) |
| 101 | } |
| 102 | if _, err := fx.noProcess(t, false); err == nil { |
| 103 | t.Fatal("unreadable descriptor entry passed") |
| 104 | } |
| 105 | } |
| 106 | |
| 107 | func TestRev3NoProcessCoversUnlinkedNestedFile(t *testing.T) { |
| 108 | fx := newWritersKernelFixture(t) |
| 109 | fx.dropAgentHolds(t) |
| 110 | for _, p := range []string{fx.db, fx.db + "-wal"} { |
| 111 | if err := os.Remove(p); err != nil { |
| 112 | t.Fatal(err) |
| 113 | } |
| 114 | } |
| 115 | nested := filepath.Join(filepath.Dir(fx.db), "sqlite", "gone.db") |
| 116 | if err := os.MkdirAll(filepath.Dir(nested), 0700); err != nil { |
| 117 | t.Fatal(err) |
| 118 | } |
| 119 | if err := os.WriteFile(nested, nil, 0600); err != nil { |
| 120 | t.Fatal(err) |
| 121 | } |
| 122 | if err := os.Remove(nested); err != nil { |
| 123 | t.Fatal(err) |
| 124 | } |
| 125 | rev3HoldTarget(t, fx, 36, 13, nested+" (deleted)") |
| 126 | if _, err := fx.noProcess(t, false); !errors.Is(err, ErrClaimStopIdentity) { |
| 127 | t.Fatalf("unlinked nested holder passed: %v", err) |
| 128 | } |
| 129 | } |
| 130 | |
amadan