Carl Johnsen
4dbc33ac34
First up is renaming partitions so their names don't clash. Second is to forcefully unmount a partition before mounting to ensure that the volume isn't mounted to a transient location prior to mounting.
613 lines
26 KiB
C#
613 lines
26 KiB
C#
// Copyright (C) 2025, The Duplicati Team
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// https://duplicati.com, hello@duplicati.com
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the "Software"),
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// to deal in the Software without restriction, including without limitation
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// the rights to use, copy, modify, merge, publish, distribute, sublicense,
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// and/or sell copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.IO;
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using System.Linq;
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using System.Threading;
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using System.Xml.Linq;
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using Duplicati.Proprietary.DiskImage;
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using NUnit.Framework;
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#nullable enable
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namespace Duplicati.UnitTest.DiskImage
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{
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/// <summary>
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/// macOS implementation of <see cref="IDiskImageHelper"/> using hdiutil and standard macOS tools.
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/// </summary>
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internal class MacOSDiskImageHelper : IDiskImageHelper
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{
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/// <inheritdoc />
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public string CreateDisk(string imagePath, long sizeB)
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{
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// Ensure the directory exists
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var directory = Path.GetDirectoryName(imagePath);
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if (!string.IsNullOrEmpty(directory) && !Directory.Exists(directory))
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Directory.CreateDirectory(directory);
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// Delete existing image if it exists
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if (File.Exists(imagePath))
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try
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{
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CleanupDisk(imagePath);
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}
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catch
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{
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// Ignore errors during cleanup
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}
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// Create a raw disk image using hdiutil
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// Use UDIF format with "Free Space" filesystem (unformatted)
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RunProcess("hdiutil", $"create -size {sizeB} -type UDIF -layout NONE -o \"{imagePath}\"");
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var output = RunProcess("hdiutil", $"attach -nomount \"{imagePath}\"");
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// Parse the disk device from output (e.g., "/dev/disk4")
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var diskDevice = output.Trim().Split(new[] { '\r', '\n' }, StringSplitOptions.RemoveEmptyEntries).FirstOrDefault()?.Trim()
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?? throw new InvalidOperationException("Failed to get disk device from hdiutil attach output");
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// Return the raw device path for direct I/O
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return diskDevice.Replace("/dev/disk", "/dev/rdisk");
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}
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private string[] GetPartitionNames(string diskIdentifier)
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{
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var output = RunProcess("diskutil", $"list {diskIdentifier}");
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// Very hardcoded to disks with < 10 partitions and no identifiers with spaces. Should be sufficient for test purposes.
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return output
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.Split('\n')
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.Select(x => x.Trim())
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.Where(x => x.Length > 1 && x[1] == ':')
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.Skip(2)
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.Select(x => x.Split([' '], StringSplitOptions.RemoveEmptyEntries).LastOrDefault())
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.Where(x => x is not null)
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.Select(x => x!)
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.ToArray();
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}
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private string[] GetMountPoints(string diskIdentifier)
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{
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var partitions = GetPartitionNames(diskIdentifier);
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var mountPoints = new System.Collections.Generic.List<string>();
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foreach (var partition in partitions)
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{
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var output = RunProcess("diskutil", $"info /dev/{partition}");
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// Check if this is an APFS Physical Store
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var isApfsPhysicalStore = output.Contains("APFS Physical Store") ||
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output.Split('\n').Any(l => l.Trim().StartsWith("Partition Type:") && l.Contains("Apple_APFS"));
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if (isApfsPhysicalStore)
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{
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// For APFS, get the container and then get volumes from it
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var containerLine = output
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.Split('\n')
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.FirstOrDefault(l => l.Trim().StartsWith("APFS Container:"));
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if (containerLine != null)
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{
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var containerId = containerLine.Split([':'], 2)[1].Trim();
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// Get volumes from the container (they are like disk5s1, disk5s2, etc.)
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var containerVolumes = GetApfsContainerVolumes(containerId);
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foreach (var volume in containerVolumes)
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{
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var volumeOutput = RunProcess("diskutil", $"info {volume}");
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var mountPoint = ExtractMountPoint(volumeOutput);
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if (!string.IsNullOrEmpty(mountPoint))
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mountPoints.Add(mountPoint);
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}
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}
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}
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else
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{
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// Regular partition - extract mount point directly
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var mountPoint = ExtractMountPoint(output);
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if (!string.IsNullOrEmpty(mountPoint))
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mountPoints.Add(mountPoint);
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}
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}
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return [.. mountPoints];
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}
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private string[] GetApfsContainerVolumes(string containerId)
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{
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var output = RunProcess("diskutil", $"list {containerId}");
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// Parse volumes from container listing (format: disk5s1, disk5s2, etc.)
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return output
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.Split('\n')
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.Select(x => x.Trim())
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.Where(x => x.StartsWith(containerId + "s", StringComparison.OrdinalIgnoreCase))
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.Select(x => x.Split([' '], StringSplitOptions.RemoveEmptyEntries).FirstOrDefault())
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.Where(x => x is not null)
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.Select(x => x!)
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.ToArray();
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}
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private string? ExtractMountPoint(string diskutilInfoOutput)
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{
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// Look for "Mount Point:" line
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var mountLine = diskutilInfoOutput
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.Split('\n')
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.FirstOrDefault(l => l.Trim().StartsWith("Mount Point:"));
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if (mountLine == null)
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return null;
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var mountPoint = mountLine.Split([':'], 2)[1].Trim();
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// Return null if not mounted or not applicable
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if (string.IsNullOrEmpty(mountPoint) ||
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mountPoint == "Not mounted" ||
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mountPoint == "Not applicable (no file system)")
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return null;
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return mountPoint;
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}
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/// <inheritdoc />
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public string[] InitializeDisk(string diskIdentifier, Proprietary.DiskImage.PartitionTableType tableType, (Proprietary.DiskImage.FileSystemType, long)[] partitions)
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{
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if (tableType == Proprietary.DiskImage.PartitionTableType.Unknown)
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return []; // No partition table, so nothing to initialize
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// Use diskutil to partition the disk with the specified scheme
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// "Free Space" means no filesystem, just the partition table
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var partitionStrings = partitions.Length > 0 ? partitions.Select((p, i) =>
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{
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var fsType = p.Item1 switch
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{
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Proprietary.DiskImage.FileSystemType.NTFS => throw new NotSupportedException("NTFS is not natively supported on macOS for creating partitions. Use ExFAT or FAT32 instead."),
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Proprietary.DiskImage.FileSystemType.FAT32 => "\"MS-DOS FAT32\"",
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Proprietary.DiskImage.FileSystemType.ExFAT => "ExFAT",
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Proprietary.DiskImage.FileSystemType.HFSPlus => "HFS+",
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Proprietary.DiskImage.FileSystemType.APFS => "APFS",
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_ => throw new ArgumentException($"Unsupported filesystem type on macOS: {p.Item1}", nameof(partitions))
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};
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var sizeArg = p.Item2 > 0 ? $"{p.Item2}" : "0";
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return $"{fsType} \"Partition {i + 1}\" {sizeArg}";
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})
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: ["\"Free Space\" \"\" 0"];
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var partitionArgs = string.Join(" ", partitionStrings);
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RunProcess("diskutil", $"partitionDisk {diskIdentifier} {tableType.ToString().ToUpperInvariant()} {partitionArgs}");
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if (partitions.Length == 0)
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return [];
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return GetMountPoints(diskIdentifier);
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}
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/// <inheritdoc />
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public string[] Mount(string diskIdentifier, string? baseMountPath = null)
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{
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// Check if already mounted
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try
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{
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var existingMountPoints = GetMountPoints(diskIdentifier);
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if (existingMountPoints.Length > 0 && existingMountPoints.All(mp => mp.StartsWith(baseMountPath ?? "/Volumes/")))
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{
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return existingMountPoints;
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}
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}
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catch
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{
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// Ignore errors and try mounting
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}
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// Get the list of partitions first to ensure we target the correct disk
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var partitions = GetPartitionNames(diskIdentifier);
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List<string> mountPoints = [];
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foreach (var partition in partitions)
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{
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var output = RunProcess("diskutil", $"info /dev/{partition}");
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// Check if this is an APFS Physical Store
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var isApfsPhysicalStore = output.Contains("APFS Physical Store") ||
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output.Split('\n').Any(l => l.Trim().StartsWith("Partition Type:") && l.Contains("Apple_APFS"));
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if (isApfsPhysicalStore)
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{
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// For APFS, get the container and mount volumes from it
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var containerLine = output
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.Split('\n')
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.FirstOrDefault(l => l.Trim().StartsWith("APFS Container:"));
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if (containerLine != null)
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{
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var containerId = containerLine.Split([':'], 2)[1].Trim();
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// Get volumes from the container (they are like disk5s1, disk5s2, etc.)
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var containerVolumes = GetApfsContainerVolumes(containerId);
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foreach (var volume in containerVolumes)
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{
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MountVolume(volume, baseMountPath, mountPoints);
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}
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}
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}
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else
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{
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// Regular partition - mount directly
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MountVolume(partition, baseMountPath, mountPoints);
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}
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}
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return mountPoints.Count == 0 ? WaitForMountPoints(diskIdentifier) : [.. mountPoints];
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}
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/// <summary>
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/// Mounts a single volume/partition with optional custom mount point.
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/// </summary>
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/// <param name="volume">The volume identifier (e.g., "disk4s1").</param>
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/// <param name="baseMountPath">Optional base path for mounting.</param>
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/// <param name="mountPoints">List to collect mount points.</param>
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private void MountVolume(string volume, string? baseMountPath, List<string> mountPoints)
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{
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var dir = "";
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var mountArgs = "";
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if (baseMountPath is not null)
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{
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dir = Path.Combine(baseMountPath, volume);
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Directory.CreateDirectory(dir); // diskutil will mount to this directory instead of /Volumes/ if it exists, so create it ahead of time
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//mountPoints.Add(dir);
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mountArgs = $"-mountPoint \"{dir}\"";
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}
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try
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{
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try { RunProcess("diskutil", $"unmount force /dev/{volume}"); } catch { } // Unmount first in case it's already mounted somewhere else, to ensure it gets mounted to the correct location
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RunProcess("diskutil", $"mount -nobrowse {mountArgs} /dev/{volume}");
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}
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catch (Exception ex)
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{
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TestContext.Progress.WriteLine($"Warning: Failed to mount volume /dev/{volume}: {ex.Message}");
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}
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// Verify the mount
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var mp = RunProcess("diskutil", $"info /dev/{volume}");
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var mountPoint = ExtractMountPoint(mp);
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if (!string.IsNullOrEmpty(mountPoint))
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{
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mountPoints.Add(mountPoint);
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if (!mountPoint.StartsWith(baseMountPath ?? "/Volumes/"))
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{
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TestContext.Progress.WriteLine($"Warning: Volume /dev/{volume} did not mount to expected location. Output: {mp}");
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}
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}
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else
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{
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TestContext.Progress.WriteLine($"Warning: Volume /dev/{volume} did not report a mount point after mounting. Output: {mp}");
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}
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}
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/// <summary>
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/// Waits for mount points to be fully established after a mount operation.
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/// Uses exponential backoff starting from a short delay to minimize wait time
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/// in the common case while still handling slow mounts.
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///
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/// After mounting (especially after raw partition table writes during restore),
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/// macOS may need time to fully recognize filesystems and establish mount points
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/// in /Volumes/. Without this retry loop, mount points may be:
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/// - Not yet available (empty array)
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/// - In a transient location like /private/var/ instead of /Volumes/
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/// - Mounted but with empty directories (filesystem not yet recognized)
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/// </summary>
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/// <param name="diskIdentifier">The disk identifier to check mount points for.</param>
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/// <returns>An array of mount point paths.</returns>
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private string[] WaitForMountPoints(string diskIdentifier)
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{
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const int maxRetries = 10;
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const int initialDelayMs = 100;
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const int maxDelayMs = 1000;
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var delayMs = initialDelayMs;
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for (int i = 0; i < maxRetries; i++)
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{
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var mountPoints = GetMountPoints(diskIdentifier);
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if (mountPoints.Length > 0)
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{
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// Check if any mount points are in a transient location (not under /Volumes/)
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if (mountPoints.Any(mp => !mp.StartsWith("/Volumes/")))
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{
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Thread.Sleep(delayMs);
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delayMs = Math.Min(delayMs * 2, maxDelayMs);
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continue;
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}
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// Check if all mount points have filesystem entries (not empty)
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var allNonEmpty = mountPoints.All(mp =>
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{
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try { return Directory.GetFileSystemEntries(mp).Length > 0; }
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catch { return false; }
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});
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if (allNonEmpty || i == maxRetries - 1)
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return mountPoints;
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}
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Thread.Sleep(delayMs);
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delayMs = Math.Min(delayMs * 2, maxDelayMs);
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}
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// Final attempt - return whatever we have
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return GetMountPoints(diskIdentifier);
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}
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public void Unmount(string diskIdentifier)
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{
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// Unmount all volumes on the disk
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RunProcess("diskutil", $"unmountDisk {diskIdentifier}");
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}
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/// <inheritdoc />
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public void FlushDisk(string diskIdentifier)
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{
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// On macOS, use sync to flush all filesystem buffers
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RunProcess("sync", "");
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}
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/// <inheritdoc />
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public void CleanupDisk(string imagePath, string? diskIdentifier = null)
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{
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if (diskIdentifier is null)
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{
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var output = RunProcess("hdiutil", $"info");
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diskIdentifier = output
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.Split("================================================")
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.Skip(1) // Skip the header
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.Select(d =>
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{
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var lines = d
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.Split('\n')
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.Select(l => l.Trim())
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.Where(l => l.Length > 0)
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.ToList();
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var imagePathLine = lines.FirstOrDefault(l => l.StartsWith("image-path"));
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if (imagePathLine == null)
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return null;
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var path = imagePathLine.Split([':'], 2)[1].Trim();
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if (!string.Equals(path, imagePath, StringComparison.OrdinalIgnoreCase))
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return null;
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var deviceLine = lines.FirstOrDefault(l => l.StartsWith("/dev/"));
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if (deviceLine == null)
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return null;
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var device = deviceLine
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.Split(['\t'], 2)[0]
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.Trim();
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return device;
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})
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.FirstOrDefault(d => d != null);
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}
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if (diskIdentifier is null)
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throw new InvalidOperationException($"Failed to determine disk identifier for {imagePath} during cleanup");
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try
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{
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RunProcess("diskutil", $"eject {diskIdentifier}");
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}
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catch (Exception ex)
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{
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TestContext.Progress.WriteLine($"Warning: Failed to detach disk image: {ex.Message}");
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}
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try
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{
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if (File.Exists(imagePath))
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File.Delete(imagePath);
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}
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catch (Exception ex)
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{
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TestContext.Progress.WriteLine($"Warning: Failed to delete disk image file: {ex.Message}");
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}
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}
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/// <inheritdoc />
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public bool HasRequiredPrivileges()
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{
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// Root is not required for virtual disks.
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return true;
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}
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/// <inheritdoc />
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public Proprietary.DiskImage.PartitionTableGeometry GetPartitionTable(string diskIdentifier)
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{
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var output = RunProcess("diskutil", $"info {diskIdentifier}");
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var lines = output
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.Split('\n')
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.Select(l => l.Trim())
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.Where(l => l.Length > 0)
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.ToList();
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PartitionTableType tableType = PartitionTableType.Unknown;
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long size = -1;
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int sectorSize = -1;
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foreach (var line in lines)
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{
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var parts = line.Split([':'], 2);
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switch (parts[0].Trim())
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{
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case "Device Identifier":
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if (!diskIdentifier.EndsWith(parts[1].Trim(), StringComparison.OrdinalIgnoreCase))
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throw new InvalidOperationException($"Disk identifier mismatch in diskutil info output: {diskIdentifier} doesn't end with {parts[1].Trim()}");
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break;
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case "Content (IOContent)":
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tableType = parts[1].Trim() switch
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{
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"GUID_partition_scheme" => PartitionTableType.GPT,
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"FDisk_partition_scheme" => PartitionTableType.MBR,
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_ => PartitionTableType.Unknown
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};
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break;
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case "Disk Size":
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var totalbytesPart = parts[1].Trim().Split(' ').Skip(2).FirstOrDefault()?.TrimStart('(').TrimEnd(')');
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if (totalbytesPart is not null)
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size = long.TryParse(totalbytesPart, out long parsedSize) ? parsedSize : -1;
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break;
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case "Device Block Size":
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var sectorSizePart = parts[1].Trim().Split(' ').FirstOrDefault();
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if (sectorSizePart != null && int.TryParse(sectorSizePart, out int parsedSectorSize))
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sectorSize = parsedSectorSize;
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break;
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}
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}
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if (size == -1 || sectorSize == -1)
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throw new InvalidOperationException($"Failed to retrieve partition table information for disk {diskIdentifier}");
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return new Proprietary.DiskImage.PartitionTableGeometry
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{
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Type = tableType,
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Size = size,
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SectorSize = sectorSize
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// Ignore the rest for now.
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};
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}
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/// <inheritdoc />
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public PartitionGeometry[] GetPartitions(string diskIdentifier)
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{
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var names = GetPartitionNames(diskIdentifier);
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var partitions = new List<PartitionGeometry>();
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foreach (var name in names)
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{
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var output = RunProcess("diskutil", $"info /dev/{name}");
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var lines = output
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.Split('\n')
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.Select(l => l.Trim())
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.Where(l => l.Length > 0)
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.ToList();
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PartitionGeometry partition = new()
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{
|
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Number = int.TryParse(name.AsSpan(name.Length - 1), out int num) ? num : -1,
|
|
Type = PartitionType.Unknown,
|
|
StartOffset = -1,
|
|
Size = -1,
|
|
Name = null,
|
|
FilesystemType = Proprietary.DiskImage.FileSystemType.Unknown,
|
|
VolumeGuid = null,
|
|
TableType = PartitionTableType.Unknown
|
|
};
|
|
|
|
foreach (var line in lines)
|
|
{
|
|
var parts = line.Split([':'], 2);
|
|
switch (parts[0].Trim())
|
|
{
|
|
case "Device Node":
|
|
if (!string.Equals(parts[1].Trim(), $"/dev/{name}", StringComparison.OrdinalIgnoreCase))
|
|
throw new InvalidOperationException($"Partition identifier mismatch in diskutil info output: expected /dev/{name}, got {parts[1].Trim()}");
|
|
break;
|
|
case "Partition Offset":
|
|
var offsetPart = parts[1].Trim().Split(' ').FirstOrDefault();
|
|
if (offsetPart != null && long.TryParse(offsetPart, out long parsedOffset))
|
|
partition.StartOffset = parsedOffset;
|
|
break;
|
|
case "Disk Size":
|
|
var sizePart = parts[1].Trim().Split(' ').FirstOrDefault();
|
|
if (sizePart != null && long.TryParse(sizePart, out long parsedSize))
|
|
partition.Size = parsedSize;
|
|
break;
|
|
case "Volume Name":
|
|
partition.Name = parts[1].Trim();
|
|
break;
|
|
case "File System Personality":
|
|
partition.FilesystemType = parts[1].Trim() switch
|
|
{
|
|
"MS-DOS FAT32" => Proprietary.DiskImage.FileSystemType.FAT32,
|
|
"ExFAT" => Proprietary.DiskImage.FileSystemType.ExFAT,
|
|
"HFS+" => Proprietary.DiskImage.FileSystemType.HFSPlus,
|
|
"APFS" => Proprietary.DiskImage.FileSystemType.APFS,
|
|
_ => Proprietary.DiskImage.FileSystemType.Unknown
|
|
};
|
|
break;
|
|
case "Volume UUID":
|
|
if (Guid.TryParse(parts[1].Trim(), out Guid parsedGuid))
|
|
partition.VolumeGuid = parsedGuid;
|
|
break;
|
|
default:
|
|
// Ignore other lines for now
|
|
break;
|
|
}
|
|
}
|
|
|
|
partitions.Add(partition);
|
|
}
|
|
|
|
return partitions.ToArray();
|
|
}
|
|
|
|
private string RunProcess(string fileName, string arguments)
|
|
{
|
|
var psi = new ProcessStartInfo
|
|
{
|
|
FileName = fileName,
|
|
Arguments = arguments,
|
|
RedirectStandardOutput = true,
|
|
RedirectStandardError = true,
|
|
UseShellExecute = false,
|
|
CreateNoWindow = true
|
|
};
|
|
|
|
using var process = new Process { StartInfo = psi };
|
|
process.Start();
|
|
string output = process.StandardOutput.ReadToEnd();
|
|
string error = process.StandardError.ReadToEnd();
|
|
process.WaitForExit();
|
|
|
|
if (process.ExitCode != 0)
|
|
{
|
|
Console.WriteLine($"Error running process {fileName} {arguments}");
|
|
Console.WriteLine($"Error: {error}");
|
|
Console.WriteLine($"Output: {output}");
|
|
throw new InvalidOperationException($"Process {fileName} exited with code {process.ExitCode}: {error}");
|
|
}
|
|
|
|
return output;
|
|
}
|
|
|
|
/// <inheritdoc />
|
|
public void Dispose()
|
|
{
|
|
// Nothing to dispose
|
|
GC.SuppressFinalize(this);
|
|
}
|
|
}
|
|
}
|