Torxed fix sys command calls (#932)

* Fixed exceptions in is_vm() and virtualization()

* Added exception handling for parted in BlockDevice.free_space

archinstall/lib/disk/blockdevice.py

@@ -8,7 +8,7 @@ from typing import Optional, Dict, Any, Iterator, Tuple, List, TYPE_CHECKING
 if TYPE_CHECKING:
 	from .partition import Partition
 	
-from ..exceptions import DiskError
+from ..exceptions import DiskError, SysCallError
 from ..output import log
 from ..general import SysCommand
 from ..storage import storage
@@ -189,10 +189,13 @@ class BlockDevice:
 		# that is "outside" the disk. in /dev/sr0 this is usually the case with Archiso,
 		# so the free will ignore the ESP partition and just give the "free" space.
 		# Doesn't harm us, but worth noting in case something weird happens.
-		for line in SysCommand(f"parted -s --machine {self.path} print free"):
-			if 'free' in (free_space := line.decode('UTF-8')):
-				_, start, end, size, *_ = free_space.strip('\r\n;').split(':')
-				yield (start, end, size)
+		try:
+			for line in SysCommand(f"parted -s --machine {self.path} print free"):
+				if 'free' in (free_space := line.decode('UTF-8')):
+					_, start, end, size, *_ = free_space.strip('\r\n;').split(':')
+					yield (start, end, size)
+		except SysCallError as error:
+			log(f"Could not get free space on {self.path}: {error}", level=logging.INFO)
 
 	@property
 	def largest_free_space(self) -> List[str]:

archinstall/lib/hardware.py

@@ -6,6 +6,7 @@ from typing import Iterator, Optional, Union
 
 from .general import SysCommand
 from .networking import list_interfaces, enrich_iface_types
+from .exceptions import SysCallError
 from .output import log
 
 __packages__ = [
@@ -170,10 +171,19 @@ def mem_total() -> Optional[int]:
 
 
 def virtualization() -> Optional[str]:
-	return str(SysCommand("systemd-detect-virt")).strip('\r\n')
+	try:
+		return str(SysCommand("systemd-detect-virt")).strip('\r\n')
+	except SysCallError as error:
+		log(f"Could not detect virtual system: {error}", level=logging.DEBUG)
+
+	return None
 
 
 def is_vm() -> bool:
-	return b"none" not in b"".join(SysCommand("systemd-detect-virt")).lower()
+	try:
+		return b"none" not in b"".join(SysCommand("systemd-detect-virt")).lower()
+	except SysCallError as error:
+		log(f"System is not running in a VM: {error}", level=logging.DEBUG)
+	return None
 
 # TODO: Add more identifiers