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hakurei/internal/app/app_test.go
Ophestra 44ba7a5f02
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hst/enablement: move bits from system 
This is part of the hst API, should not be in the implementation package.

Signed-off-by: Ophestra <cat@gensokyo.uk>
2025-09-29 06:34:29 +09:00

453 lines
19 KiB
Go
Raw Blame History

package app
import (
"context"
"encoding/json"
"io/fs"
"os"
"reflect"
"syscall"
"testing"
"time"
"hakurei.app/container"
"hakurei.app/container/seccomp"
"hakurei.app/hst"
"hakurei.app/internal/app/state"
"hakurei.app/system"
"hakurei.app/system/acl"
"hakurei.app/system/dbus"
)
func TestApp(t *testing.T) {
testCases := []struct {
name string
k syscallDispatcher
config *hst.Config
id state.ID
wantSys *system.I
wantParams *container.Params
}{
{
"nixos permissive defaults no enablements", new(stubNixOS),
&hst.Config{Username: "chronos", Home: m("/home/chronos")},
state.ID{
0x4a, 0x45, 0x0b, 0x65,
0x96, 0xd7, 0xbc, 0x15,
0xbd, 0x01, 0x78, 0x0e,
0xb9, 0xa6, 0x07, 0xac,
},
system.New(context.TODO(), container.NewMsg(nil), 1000000).
Ensure("/tmp/hakurei.0", 0711).
Ensure("/tmp/hakurei.0/runtime", 0700).UpdatePermType(system.User, "/tmp/hakurei.0/runtime", acl.Execute).
Ensure("/tmp/hakurei.0/runtime/0", 0700).UpdatePermType(system.User, "/tmp/hakurei.0/runtime/0", acl.Read, acl.Write, acl.Execute).
Ensure("/tmp/hakurei.0/tmpdir", 0700).UpdatePermType(system.User, "/tmp/hakurei.0/tmpdir", acl.Execute).
Ensure("/tmp/hakurei.0/tmpdir/0", 01700).UpdatePermType(system.User, "/tmp/hakurei.0/tmpdir/0", acl.Read, acl.Write, acl.Execute),
&container.Params{
Dir: m("/home/chronos"),
Path: m("/run/current-system/sw/bin/zsh"),
Args: []string{"/run/current-system/sw/bin/zsh"},
Env: []string{
"HOME=/home/chronos",
"SHELL=/run/current-system/sw/bin/zsh",
"TERM=xterm-256color",
"USER=chronos",
"XDG_RUNTIME_DIR=/run/user/65534",
"XDG_SESSION_CLASS=user",
"XDG_SESSION_TYPE=tty",
},
Ops: new(container.Ops).
Root(m("/"), container.BindWritable).
Proc(m("/proc/")).
Tmpfs(hst.AbsTmp, 4096, 0755).
DevWritable(m("/dev/"), true).
Tmpfs(m("/dev/shm"), 0, 01777).
Bind(m("/dev/kvm"), m("/dev/kvm"), container.BindWritable|container.BindDevice|container.BindOptional).
Readonly(m("/var/run/nscd"), 0755).
Etc(m("/etc/"), "4a450b6596d7bc15bd01780eb9a607ac").
Tmpfs(m("/run/user/1971"), 8192, 0755).
Tmpfs(m("/run/dbus"), 8192, 0755).
Remount(m("/dev/"), syscall.MS_RDONLY).
Tmpfs(m("/run/user/"), 4096, 0755).
Bind(m("/tmp/hakurei.0/runtime/0"), m("/run/user/65534"), container.BindWritable).
Bind(m("/tmp/hakurei.0/tmpdir/0"), m("/tmp/"), container.BindWritable).
Place(m("/etc/passwd"), []byte("chronos:x:65534:65534:Hakurei:/home/chronos:/run/current-system/sw/bin/zsh\n")).
Place(m("/etc/group"), []byte("hakurei:x:65534:\n")).
Remount(m("/"), syscall.MS_RDONLY),
SeccompPresets: seccomp.PresetExt | seccomp.PresetDenyDevel,
HostNet: true,
HostAbstract: true,
RetainSession: true,
ForwardCancel: true,
},
},
{
"nixos permissive defaults chromium", new(stubNixOS),
&hst.Config{
ID: "org.chromium.Chromium",
Args: []string{"zsh", "-c", "exec chromium "},
Identity: 9,
Groups: []string{"video"},
Username: "chronos",
Home: m("/home/chronos"),
SessionBus: &dbus.Config{
Talk: []string{
"org.freedesktop.Notifications",
"org.freedesktop.FileManager1",
"org.freedesktop.ScreenSaver",
"org.freedesktop.secrets",
"org.kde.kwalletd5",
"org.kde.kwalletd6",
"org.gnome.SessionManager",
},
Own: []string{
"org.chromium.Chromium.*",
"org.mpris.MediaPlayer2.org.chromium.Chromium.*",
"org.mpris.MediaPlayer2.chromium.*",
},
Call: map[string]string{
"org.freedesktop.portal.*": "*",
},
Broadcast: map[string]string{
"org.freedesktop.portal.*": "@/org/freedesktop/portal/*",
},
Filter: true,
},
SystemBus: &dbus.Config{
Talk: []string{
"org.bluez",
"org.freedesktop.Avahi",
"org.freedesktop.UPower",
},
Filter: true,
},
Enablements: hst.NewEnablements(hst.EWayland | hst.EDBus | hst.EPulse),
},
state.ID{
0xeb, 0xf0, 0x83, 0xd1,
0xb1, 0x75, 0x91, 0x17,
0x82, 0xd4, 0x13, 0x36,
0x9b, 0x64, 0xce, 0x7c,
},
system.New(context.TODO(), container.NewMsg(nil), 1000009).
Ensure("/tmp/hakurei.0", 0711).
Ensure("/tmp/hakurei.0/runtime", 0700).UpdatePermType(system.User, "/tmp/hakurei.0/runtime", acl.Execute).
Ensure("/tmp/hakurei.0/runtime/9", 0700).UpdatePermType(system.User, "/tmp/hakurei.0/runtime/9", acl.Read, acl.Write, acl.Execute).
Ensure("/tmp/hakurei.0/tmpdir", 0700).UpdatePermType(system.User, "/tmp/hakurei.0/tmpdir", acl.Execute).
Ensure("/tmp/hakurei.0/tmpdir/9", 01700).UpdatePermType(system.User, "/tmp/hakurei.0/tmpdir/9", acl.Read, acl.Write, acl.Execute).
Ephemeral(system.Process, "/tmp/hakurei.0/ebf083d1b175911782d413369b64ce7c", 0711).
Wayland(new(*os.File), "/tmp/hakurei.0/ebf083d1b175911782d413369b64ce7c/wayland", "/run/user/1971/wayland-0", "org.chromium.Chromium", "ebf083d1b175911782d413369b64ce7c").
Ensure("/run/user/1971/hakurei", 0700).UpdatePermType(system.User, "/run/user/1971/hakurei", acl.Execute).
Ensure("/run/user/1971", 0700).UpdatePermType(system.User, "/run/user/1971", acl.Execute). // this is ordered as is because the previous Ensure only calls mkdir if XDG_RUNTIME_DIR is unset
Ephemeral(system.Process, "/run/user/1971/hakurei/ebf083d1b175911782d413369b64ce7c", 0700).UpdatePermType(system.Process, "/run/user/1971/hakurei/ebf083d1b175911782d413369b64ce7c", acl.Execute).
Link("/run/user/1971/pulse/native", "/run/user/1971/hakurei/ebf083d1b175911782d413369b64ce7c/pulse").
CopyFile(new([]byte), "/home/ophestra/xdg/config/pulse/cookie", 256, 256).
MustProxyDBus("/tmp/hakurei.0/ebf083d1b175911782d413369b64ce7c/bus", &dbus.Config{
Talk: []string{
"org.freedesktop.Notifications",
"org.freedesktop.FileManager1",
"org.freedesktop.ScreenSaver",
"org.freedesktop.secrets",
"org.kde.kwalletd5",
"org.kde.kwalletd6",
"org.gnome.SessionManager",
},
Own: []string{
"org.chromium.Chromium.*",
"org.mpris.MediaPlayer2.org.chromium.Chromium.*",
"org.mpris.MediaPlayer2.chromium.*",
},
Call: map[string]string{
"org.freedesktop.portal.*": "*",
},
Broadcast: map[string]string{
"org.freedesktop.portal.*": "@/org/freedesktop/portal/*",
},
Filter: true,
}, "/tmp/hakurei.0/ebf083d1b175911782d413369b64ce7c/system_bus_socket", &dbus.Config{
Talk: []string{
"org.bluez",
"org.freedesktop.Avahi",
"org.freedesktop.UPower",
},
Filter: true,
}).
UpdatePerm("/tmp/hakurei.0/ebf083d1b175911782d413369b64ce7c/bus", acl.Read, acl.Write).
UpdatePerm("/tmp/hakurei.0/ebf083d1b175911782d413369b64ce7c/system_bus_socket", acl.Read, acl.Write),
&container.Params{
Dir: m("/home/chronos"),
Path: m("/run/current-system/sw/bin/zsh"),
Args: []string{"zsh", "-c", "exec chromium "},
Env: []string{
"DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/65534/bus",
"DBUS_SYSTEM_BUS_ADDRESS=unix:path=/run/dbus/system_bus_socket",
"HOME=/home/chronos",
"PULSE_COOKIE=" + hst.Tmp + "/pulse-cookie",
"PULSE_SERVER=unix:/run/user/65534/pulse/native",
"SHELL=/run/current-system/sw/bin/zsh",
"TERM=xterm-256color",
"USER=chronos",
"WAYLAND_DISPLAY=wayland-0",
"XDG_RUNTIME_DIR=/run/user/65534",
"XDG_SESSION_CLASS=user",
"XDG_SESSION_TYPE=tty",
},
Ops: new(container.Ops).
Root(m("/"), container.BindWritable).
Proc(m("/proc/")).
Tmpfs(hst.AbsTmp, 4096, 0755).
DevWritable(m("/dev/"), true).
Tmpfs(m("/dev/shm"), 0, 01777).
Bind(m("/dev/dri"), m("/dev/dri"), container.BindWritable|container.BindDevice|container.BindOptional).
Bind(m("/dev/kvm"), m("/dev/kvm"), container.BindWritable|container.BindDevice|container.BindOptional).
Readonly(m("/var/run/nscd"), 0755).
Etc(m("/etc/"), "ebf083d1b175911782d413369b64ce7c").
Tmpfs(m("/run/user/1971"), 8192, 0755).
Tmpfs(m("/run/dbus"), 8192, 0755).
Remount(m("/dev/"), syscall.MS_RDONLY).
Tmpfs(m("/run/user/"), 4096, 0755).
Bind(m("/tmp/hakurei.0/runtime/9"), m("/run/user/65534"), container.BindWritable).
Bind(m("/tmp/hakurei.0/tmpdir/9"), m("/tmp/"), container.BindWritable).
Place(m("/etc/passwd"), []byte("chronos:x:65534:65534:Hakurei:/home/chronos:/run/current-system/sw/bin/zsh\n")).
Place(m("/etc/group"), []byte("hakurei:x:65534:\n")).
Bind(m("/tmp/hakurei.0/ebf083d1b175911782d413369b64ce7c/wayland"), m("/run/user/65534/wayland-0"), 0).
Bind(m("/run/user/1971/hakurei/ebf083d1b175911782d413369b64ce7c/pulse"), m("/run/user/65534/pulse/native"), 0).
Place(m(hst.Tmp+"/pulse-cookie"), nil).
Bind(m("/tmp/hakurei.0/ebf083d1b175911782d413369b64ce7c/bus"), m("/run/user/65534/bus"), 0).
Bind(m("/tmp/hakurei.0/ebf083d1b175911782d413369b64ce7c/system_bus_socket"), m("/run/dbus/system_bus_socket"), 0).
Remount(m("/"), syscall.MS_RDONLY),
SeccompPresets: seccomp.PresetExt | seccomp.PresetDenyDevel,
HostNet: true,
HostAbstract: true,
RetainSession: true,
ForwardCancel: true,
},
},
{
"nixos chromium direct wayland", new(stubNixOS),
&hst.Config{
ID: "org.chromium.Chromium",
Path: m("/nix/store/yqivzpzzn7z5x0lq9hmbzygh45d8rhqd-chromium-start"),
Enablements: hst.NewEnablements(hst.EWayland | hst.EDBus | hst.EPulse),
Shell: m("/run/current-system/sw/bin/zsh"),
Container: &hst.ContainerConfig{
Userns: true, HostNet: true, MapRealUID: true, Env: nil,
Filesystem: []hst.FilesystemConfigJSON{
f(&hst.FSBind{Source: m("/bin")}),
f(&hst.FSBind{Source: m("/usr/bin/")}),
f(&hst.FSBind{Source: m("/nix/store")}),
f(&hst.FSBind{Source: m("/run/current-system")}),
f(&hst.FSBind{Source: m("/sys/block"), Optional: true}),
f(&hst.FSBind{Source: m("/sys/bus"), Optional: true}),
f(&hst.FSBind{Source: m("/sys/class"), Optional: true}),
f(&hst.FSBind{Source: m("/sys/dev"), Optional: true}),
f(&hst.FSBind{Source: m("/sys/devices"), Optional: true}),
f(&hst.FSBind{Source: m("/run/opengl-driver")}),
f(&hst.FSBind{Source: m("/dev/dri"), Device: true, Optional: true}),
f(&hst.FSBind{Source: m("/etc/"), Target: m("/etc/"), Special: true}),
f(&hst.FSBind{Source: m("/var/lib/persist/module/hakurei/0/1"), Write: true, Ensure: true}),
},
},
SystemBus: &dbus.Config{
Talk: []string{"org.bluez", "org.freedesktop.Avahi", "org.freedesktop.UPower"},
Filter: true,
},
SessionBus: &dbus.Config{
Talk: []string{
"org.freedesktop.FileManager1", "org.freedesktop.Notifications",
"org.freedesktop.ScreenSaver", "org.freedesktop.secrets",
"org.kde.kwalletd5", "org.kde.kwalletd6",
},
Own: []string{
"org.chromium.Chromium.*",
"org.mpris.MediaPlayer2.org.chromium.Chromium.*",
"org.mpris.MediaPlayer2.chromium.*",
},
Call: map[string]string{}, Broadcast: map[string]string{},
Filter: true,
},
DirectWayland: true,
Username: "u0_a1",
Home: m("/var/lib/persist/module/hakurei/0/1"),
Identity: 1, Groups: []string{},
},
state.ID{
0x8e, 0x2c, 0x76, 0xb0,
0x66, 0xda, 0xbe, 0x57,
0x4c, 0xf0, 0x73, 0xbd,
0xb4, 0x6e, 0xb5, 0xc1,
},
system.New(context.TODO(), container.NewMsg(nil), 1000001).
Ensure("/tmp/hakurei.0", 0711).
Ensure("/tmp/hakurei.0/runtime", 0700).UpdatePermType(system.User, "/tmp/hakurei.0/runtime", acl.Execute).
Ensure("/tmp/hakurei.0/runtime/1", 0700).UpdatePermType(system.User, "/tmp/hakurei.0/runtime/1", acl.Read, acl.Write, acl.Execute).
Ensure("/tmp/hakurei.0/tmpdir", 0700).UpdatePermType(system.User, "/tmp/hakurei.0/tmpdir", acl.Execute).
Ensure("/tmp/hakurei.0/tmpdir/1", 01700).UpdatePermType(system.User, "/tmp/hakurei.0/tmpdir/1", acl.Read, acl.Write, acl.Execute).
Ensure("/run/user/1971/hakurei", 0700).UpdatePermType(system.User, "/run/user/1971/hakurei", acl.Execute).
Ensure("/run/user/1971", 0700).UpdatePermType(system.User, "/run/user/1971", acl.Execute). // this is ordered as is because the previous Ensure only calls mkdir if XDG_RUNTIME_DIR is unset
UpdatePermType(hst.EWayland, "/run/user/1971/wayland-0", acl.Read, acl.Write, acl.Execute).
Ephemeral(system.Process, "/run/user/1971/hakurei/8e2c76b066dabe574cf073bdb46eb5c1", 0700).UpdatePermType(system.Process, "/run/user/1971/hakurei/8e2c76b066dabe574cf073bdb46eb5c1", acl.Execute).
Link("/run/user/1971/pulse/native", "/run/user/1971/hakurei/8e2c76b066dabe574cf073bdb46eb5c1/pulse").
CopyFile(nil, "/home/ophestra/xdg/config/pulse/cookie", 256, 256).
Ephemeral(system.Process, "/tmp/hakurei.0/8e2c76b066dabe574cf073bdb46eb5c1", 0711).
MustProxyDBus("/tmp/hakurei.0/8e2c76b066dabe574cf073bdb46eb5c1/bus", &dbus.Config{
Talk: []string{
"org.freedesktop.FileManager1", "org.freedesktop.Notifications",
"org.freedesktop.ScreenSaver", "org.freedesktop.secrets",
"org.kde.kwalletd5", "org.kde.kwalletd6",
},
Own: []string{
"org.chromium.Chromium.*",
"org.mpris.MediaPlayer2.org.chromium.Chromium.*",
"org.mpris.MediaPlayer2.chromium.*",
},
Call: map[string]string{}, Broadcast: map[string]string{},
Filter: true,
}, "/tmp/hakurei.0/8e2c76b066dabe574cf073bdb46eb5c1/system_bus_socket", &dbus.Config{
Talk: []string{
"org.bluez",
"org.freedesktop.Avahi",
"org.freedesktop.UPower",
},
Filter: true,
}).
UpdatePerm("/tmp/hakurei.0/8e2c76b066dabe574cf073bdb46eb5c1/bus", acl.Read, acl.Write).
UpdatePerm("/tmp/hakurei.0/8e2c76b066dabe574cf073bdb46eb5c1/system_bus_socket", acl.Read, acl.Write),
&container.Params{
Uid: 1971,
Gid: 100,
Dir: m("/var/lib/persist/module/hakurei/0/1"),
Path: m("/nix/store/yqivzpzzn7z5x0lq9hmbzygh45d8rhqd-chromium-start"),
Args: []string{"/nix/store/yqivzpzzn7z5x0lq9hmbzygh45d8rhqd-chromium-start"},
Env: []string{
"DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/1971/bus",
"DBUS_SYSTEM_BUS_ADDRESS=unix:path=/run/dbus/system_bus_socket",
"HOME=/var/lib/persist/module/hakurei/0/1",
"PULSE_COOKIE=" + hst.Tmp + "/pulse-cookie",
"PULSE_SERVER=unix:/run/user/1971/pulse/native",
"SHELL=/run/current-system/sw/bin/zsh",
"TERM=xterm-256color",
"USER=u0_a1",
"WAYLAND_DISPLAY=wayland-0",
"XDG_RUNTIME_DIR=/run/user/1971",
"XDG_SESSION_CLASS=user",
"XDG_SESSION_TYPE=tty",
},
Ops: new(container.Ops).
Proc(m("/proc/")).
Tmpfs(hst.AbsTmp, 4096, 0755).
DevWritable(m("/dev/"), true).
Tmpfs(m("/dev/shm"), 0, 01777).
Bind(m("/bin"), m("/bin"), 0).
Bind(m("/usr/bin/"), m("/usr/bin/"), 0).
Bind(m("/nix/store"), m("/nix/store"), 0).
Bind(m("/run/current-system"), m("/run/current-system"), 0).
Bind(m("/sys/block"), m("/sys/block"), container.BindOptional).
Bind(m("/sys/bus"), m("/sys/bus"), container.BindOptional).
Bind(m("/sys/class"), m("/sys/class"), container.BindOptional).
Bind(m("/sys/dev"), m("/sys/dev"), container.BindOptional).
Bind(m("/sys/devices"), m("/sys/devices"), container.BindOptional).
Bind(m("/run/opengl-driver"), m("/run/opengl-driver"), 0).
Bind(m("/dev/dri"), m("/dev/dri"), container.BindDevice|container.BindWritable|container.BindOptional).
Etc(m("/etc/"), "8e2c76b066dabe574cf073bdb46eb5c1").
Bind(m("/var/lib/persist/module/hakurei/0/1"), m("/var/lib/persist/module/hakurei/0/1"), container.BindWritable|container.BindEnsure).
Remount(m("/dev/"), syscall.MS_RDONLY).
Tmpfs(m("/run/user/"), 4096, 0755).
Bind(m("/tmp/hakurei.0/runtime/1"), m("/run/user/1971"), container.BindWritable).
Bind(m("/tmp/hakurei.0/tmpdir/1"), m("/tmp/"), container.BindWritable).
Place(m("/etc/passwd"), []byte("u0_a1:x:1971:100:Hakurei:/var/lib/persist/module/hakurei/0/1:/run/current-system/sw/bin/zsh\n")).
Place(m("/etc/group"), []byte("hakurei:x:100:\n")).
Bind(m("/run/user/1971/wayland-0"), m("/run/user/1971/wayland-0"), 0).
Bind(m("/run/user/1971/hakurei/8e2c76b066dabe574cf073bdb46eb5c1/pulse"), m("/run/user/1971/pulse/native"), 0).
Place(m(hst.Tmp+"/pulse-cookie"), nil).
Bind(m("/tmp/hakurei.0/8e2c76b066dabe574cf073bdb46eb5c1/bus"), m("/run/user/1971/bus"), 0).
Bind(m("/tmp/hakurei.0/8e2c76b066dabe574cf073bdb46eb5c1/system_bus_socket"), m("/run/dbus/system_bus_socket"), 0).
Remount(m("/"), syscall.MS_RDONLY),
SeccompPresets: seccomp.PresetExt | seccomp.PresetDenyTTY | seccomp.PresetDenyDevel,
HostNet: true,
ForwardCancel: true,
},
},
}
for _, tc := range testCases {
t.Run(tc.name, func(t *testing.T) {
t.Run("finalise", func(t *testing.T) {
seal := outcome{syscallDispatcher: tc.k, id: &stringPair[state.ID]{tc.id, tc.id.String()}}
err := seal.finalise(t.Context(), container.NewMsg(nil), tc.config)
if err != nil {
if s, ok := container.GetErrorMessage(err); !ok {
t.Fatalf("Seal: error = %v", err)
} else {
t.Fatalf("Seal: %s", s)
}
}
t.Run("sys", func(t *testing.T) {
if !seal.sys.Equal(tc.wantSys) {
t.Errorf("Seal: sys = %#v, want %#v", seal.sys, tc.wantSys)
}
})
t.Run("params", func(t *testing.T) {
if !reflect.DeepEqual(seal.container, tc.wantParams) {
t.Errorf("seal: container =\n%s\n, want\n%s", mustMarshal(seal.container), mustMarshal(tc.wantParams))
}
})
})
})
}
}
func mustMarshal(v any) string {
if b, err := json.Marshal(v); err != nil {
panic(err.Error())
} else {
return string(b)
}
}
func stubDirEntries(names ...string) (e []fs.DirEntry, err error) {
e = make([]fs.DirEntry, len(names))
for i, name := range names {
e[i] = stubDirEntryPath(name)
}
return
}
type stubDirEntryPath string
func (p stubDirEntryPath) Name() string { return string(p) }
func (p stubDirEntryPath) IsDir() bool { panic("attempted to call IsDir") }
func (p stubDirEntryPath) Type() fs.FileMode { panic("attempted to call Type") }
func (p stubDirEntryPath) Info() (fs.FileInfo, error) { panic("attempted to call Info") }
type stubFileInfoMode fs.FileMode
func (s stubFileInfoMode) Name() string { panic("attempted to call Name") }
func (s stubFileInfoMode) Size() int64 { panic("attempted to call Size") }
func (s stubFileInfoMode) Mode() fs.FileMode { return fs.FileMode(s) }
func (s stubFileInfoMode) ModTime() time.Time { panic("attempted to call ModTime") }
func (s stubFileInfoMode) IsDir() bool { panic("attempted to call IsDir") }
func (s stubFileInfoMode) Sys() any { panic("attempted to call Sys") }
type stubFileInfoIsDir bool
func (s stubFileInfoIsDir) Name() string { panic("attempted to call Name") }
func (s stubFileInfoIsDir) Size() int64 { panic("attempted to call Size") }
func (s stubFileInfoIsDir) Mode() fs.FileMode { panic("attempted to call Mode") }
func (s stubFileInfoIsDir) ModTime() time.Time { panic("attempted to call ModTime") }
func (s stubFileInfoIsDir) IsDir() bool { return bool(s) }
func (s stubFileInfoIsDir) Sys() any { panic("attempted to call Sys") }
func m(pathname string) *container.Absolute {
return container.MustAbs(pathname)
}
func f(c hst.FilesystemConfig) hst.FilesystemConfigJSON {
return hst.FilesystemConfigJSON{FilesystemConfig: c}
}
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