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sys_patch: Add extra snapshot checks

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Avoid issues on snapshot-less installs
This commit is contained in:
Mykola Grymalyuk
2022-02-04 13:32:51 -07:00
parent 39758fec20
commit 3a9479a1d6
3 changed files with 32 additions and 15 deletions
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1
.gitignore vendored
View File

@@ -23,3 +23,4 @@ __pycache__/
/payloads/List.txt
/payloads/Installer.sh
/payloads/Info.plist
/payloads/seed.plist

38
resources/sys_patch.py
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@@ -24,11 +24,16 @@ class PatchSysVolume:
self.root_mount_path = None
self.validate = False
self.added_legacy_kexts = False
self.root_supports_snapshot = utilities.check_if_root_is_apfs_snapshot()
# GUI will detect hardware patches betfore starting PatchSysVolume()
# However the TUI will not, so allow for data to be passed in manually avoiding multiple calls
if hardware_details is None:
hardware_details = sys_patch_detect.detect_root_patch(self.computer.real_model, self.constants).detect_patch_set()
self.init_hardware_patches(hardware_details)
self.init_pathing(custom_root_mount_path=None, custom_data_mount_path=None)
def init_hardware_patches(self, hardware_details):
self.amfi_must_disable = hardware_details["Settings: Requires AMFI exemption"]
self.check_board_id = hardware_details["Settings: Requires Board ID validation"]
@@ -52,7 +57,11 @@ class PatchSysVolume:
self.legacy_gmux = hardware_details["Miscellaneous: Legacy GMUX"]
self.legacy_keyboard_backlight = hardware_details["Miscellaneous: Legacy Keyboard Backlight"]
if self.constants.detected_os > os_data.os_data.catalina:
def init_pathing(self, custom_root_mount_path=None, custom_data_mount_path=None):
if custom_root_mount_path and custom_data_mount_path:
self.mount_location = custom_root_mount_path
self.data_mount_location = custom_data_mount_path
elif self.root_supports_snapshot is True:
# Big Sur and newer use APFS snapshots
self.mount_location = "/System/Volumes/Update/mnt1"
self.mount_location_data = ""
@@ -72,8 +81,11 @@ class PatchSysVolume:
def find_mount_root_vol(self, patch):
self.root_mount_path = utilities.get_disk_path()
if self.root_mount_path.startswith("disk"):
if self.constants.detected_os == os_data.os_data.catalina and self.validate is False:
print("- Mounting Catalina Root Volume as writable")
if (
self.constants.detected_os == os_data.os_data.catalina or
(self.constants.detected_os > os_data.os_data.catalina and self.root_supports_snapshot is False)
):
print("- Mounting Dedicated Root Volume as writable")
utilities.elevated(["mount", "-uw", f"{self.mount_location}/"], stdout=subprocess.PIPE).stdout.decode().strip().encode()
print(f"- Found Root Volume at: {self.root_mount_path}")
if Path(self.mount_extensions).exists():
@@ -81,7 +93,7 @@ class PatchSysVolume:
if patch is True:
# Root Volume unpatching is unreliable due to being a live volume
# Only worth while on Big Sur as '--last-sealed-snapshot' is hit or miss
if self.constants.detected_os == os_data.os_data.big_sur and utilities.check_seal() is True:
if self.constants.detected_os == os_data.os_data.big_sur and self.root_supports_snapshot is True and utilities.check_seal() is True:
self.backup_volume()
self.patch_root_vol()
return True
@@ -89,7 +101,7 @@ class PatchSysVolume:
self.unpatch_root_vol()
return True
else:
if self.constants.detected_os > os_data.os_data.catalina:
if self.constants.detected_os > os_data.os_data.catalina and self.root_supports_snapshot is True:
print("- Mounting APFS Snapshot as writable")
result = utilities.elevated(["mount", "-o", "nobrowse", "-t", "apfs", f"/dev/{self.root_mount_path}", self.mount_location], stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
if result.returncode == 0:
@@ -99,7 +111,7 @@ class PatchSysVolume:
if patch is True:
# Root Volume unpatching is unreliable due to being a live volume
# Only worth while on Big Sur as '--last-sealed-snapshot' is hit or miss
if self.constants.detected_os == os_data.os_data.big_sur and utilities.check_seal() is True:
if self.constants.detected_os == os_data.os_data.big_sur and self.root_supports_snapshot is True and utilities.check_seal() is True:
self.backup_volume()
self.patch_root_vol()
return True
@@ -207,7 +219,7 @@ class PatchSysVolume:
print("- Could not find Extensions.zip, cannot manually unpatch root volume")
def unpatch_root_vol(self):
if self.constants.detected_os > os_data.os_data.catalina:
if self.constants.detected_os > os_data.os_data.catalina and self.root_supports_snapshot is True:
print("- Reverting to last signed APFS snapshot")
result = utilities.elevated(["bless", "--mount", self.mount_location, "--bootefi", "--last-sealed-snapshot"], stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
if result.returncode != 0:
@@ -247,12 +259,7 @@ class PatchSysVolume:
else:
self.success_status = True
print("- Successfully built new kernel cache")
# if self.constants.gui_mode is False:
# if self.constants.detected_os > os_data.os_data.catalina:
# input("Press [ENTER] to continue with snapshotting")
# else:
# input("Press [ENTER] to continue with kernel and dyld cache merging")
if self.constants.detected_os > os_data.os_data.catalina:
if self.root_supports_snapshot is True:
print("- Creating new APFS snapshot")
bless = utilities.elevated(
["bless", "--folder", f"{self.mount_location}/System/Library/CoreServices", "--bootefi", "--create-snapshot"], stdout=subprocess.PIPE, stderr=subprocess.STDOUT
@@ -270,8 +277,9 @@ class PatchSysVolume:
if self.constants.detected_os == os_data.os_data.catalina:
print("- Merging kernel cache")
utilities.process_status(utilities.elevated(["kcditto"], stdout=subprocess.PIPE, stderr=subprocess.STDOUT))
print("- Merging dyld cache")
utilities.process_status(utilities.elevated(["update_dyld_shared_cache", "-root", f"{self.mount_location}/"]))
if self.constants.detected_os in [os_data.os_data.mojave, os_data.os_data.catalina]:
print("- Merging dyld cache")
utilities.process_status(utilities.elevated(["update_dyld_shared_cache", "-root", f"{self.mount_location}/"]))
print("- Patching complete")
print("\nPlease reboot the machine for patches to take effect")
if self.constants.gui_mode is False:

8
resources/utilities.py
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@@ -84,6 +84,14 @@ def get_disk_path():
root_mount_path = root_mount_path[:-2] if root_mount_path.count("s") > 1 else root_mount_path
return root_mount_path
def check_if_root_is_apfs_snapshot():
root_partition_info = plistlib.loads(subprocess.run("diskutil info -plist /".split(), stdout=subprocess.PIPE).stdout.decode().strip().encode())
try:
is_snapshotted = root_partition_info["APFSSnapshot"]
except KeyError:
is_snapshotted = False
return is_snapshotted
def check_seal():
# 'Snapshot Sealed' property is only listed on booted snapshots