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Implement GetLogicalDrives for Unix #9745

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stephentoub merged 1 commit into from
Jul 3, 2016
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Implement GetLogicalDrives for Unix #9745

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281 changes: 281 additions & 0 deletions src/Common/src/Interop/Unix/System.Native/Interop.MountPoints.FormatInfo.cs
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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.

using System;
using System.IO;
using System.Collections.Generic;
using System.Runtime.InteropServices;

internal static partial class Interop
{
internal static partial class Sys
{
private const int MountPointFormatBufferSizeInBytes = 32;

/// <summary>
/// Internal FileSystem names and magic numbers taken from man(2) statfs
/// </summary>
/// <remarks>
/// These value names MUST be kept in sync with those in GetDriveType below
/// </remarks>
internal enum UnixFileSystemTypes : long
{
adfs = 0xadf5,
affs = 0xADFF,
befs = 0x42465331,
bfs = 0x1BADFACE,
cifs = 0xFF534D42,
coda = 0x73757245,
coherent = 0x012FF7B7,
cramfs = 0x28cd3d45,
devfs = 0x1373,
efs = 0x00414A53,
ext = 0x137D,
ext2_old = 0xEF51,
ext2 = 0xEF53,
ext3 = 0xEF53,
ext4 = 0xEF53,
hfs = 0x4244,
hpfs = 0xF995E849,
hugetlbfs = 0x958458f6,
isofs = 0x9660,
jffs2 = 0x72b6,
jfs = 0x3153464a,
minix_old = 0x137F, /* orig. minix */
minix = 0x138F, /* 30 char minix */
minix2 = 0x2468, /* minix V2 */
minix2v2 = 0x2478, /* minix V2, 30 char names */
msdos = 0x4d44,
ncpfs = 0x564c,
nfs = 0x6969,
ntfs = 0x5346544e,
openprom = 0x9fa1,
proc = 0x9fa0,
qnx4 = 0x002f,
reiserfs = 0x52654973,
romfs = 0x7275,
smb = 0x517B,
sysv2 = 0x012FF7B6,
sysv4 = 0x012FF7B5,
tmpfs = 0x01021994,
udf = 0x15013346,
ufs = 0x00011954,
usbdevice = 0x9fa2,
vxfs = 0xa501FCF5,
xenix = 0x012FF7B4,
xfs = 0x58465342,
xiafs = 0x012FD16D,
}

[StructLayout(LayoutKind.Sequential)]
internal struct MountPointInformation
{
internal ulong AvailableFreeSpace;
internal ulong TotalFreeSpace;
internal ulong TotalSize;
}

[DllImport(Libraries.SystemNative, EntryPoint = "SystemNative_GetSpaceInfoForMountPoint", SetLastError = true)]
internal static extern int GetSpaceInfoForMountPoint([MarshalAs(UnmanagedType.LPStr)]string name, out MountPointInformation mpi);

[DllImport(Libraries.SystemNative, EntryPoint = "SystemNative_GetFormatInfoForMountPoint", SetLastError = true)]
private unsafe static extern int GetFormatInfoForMountPoint(
[MarshalAs(UnmanagedType.LPStr)]string name,
byte* formatNameBuffer,
int bufferLength,
long* formatType);

internal static int GetFormatInfoForMountPoint(string name, out string format)
{
DriveType temp;
return GetFormatInfoForMountPoint(name, out format, out temp);
}

internal static int GetFormatInfoForMountPoint(string name, out DriveType type)
{
string temp;
return GetFormatInfoForMountPoint(name, out temp, out type);
}

private static int GetFormatInfoForMountPoint(string name, out string format, out DriveType type)
{
unsafe
{
byte* formatBuffer = stackalloc byte[MountPointFormatBufferSizeInBytes]; // format names should be small
long numericFormat;
int result = GetFormatInfoForMountPoint(name, formatBuffer, MountPointFormatBufferSizeInBytes, &numericFormat);
if (result == 0)
{
// Check if we have a numeric answer or string
format = numericFormat != -1 ?
Enum.GetName(typeof(UnixFileSystemTypes), numericFormat) :
Marshal.PtrToStringAnsi((IntPtr)formatBuffer);
type = GetDriveType(format);
}
else
{
format = string.Empty;
type = DriveType.Unknown;
}

return result;
}
}

/// <summary>Categorizes a file system name into a drive type.</summary>
/// <param name="fileSystemName">The name to categorize.</param>
/// <returns>The recognized drive type.</returns>
private static DriveType GetDriveType(string fileSystemName)
{
// This list is based primarily on "man fs", "man mount", "mntent.h", "/proc/filesystems",
// and "wiki.debian.org/FileSystem". It can be extended over time as we
// find additional file systems that should be recognized as a particular drive type.
switch (fileSystemName)
{
case "iso":
case "isofs":
case "iso9660":
case "fuseiso":
case "fuseiso9660":
case "umview-mod-umfuseiso9660":
return DriveType.CDRom;

case "adfs":
case "affs":
case "befs":
case "bfs":
case "btrfs":
case "ecryptfs":
case "efs":
case "ext":
case "ext2":
case "ext2_old":
case "ext3":
case "ext4":
case "ext4dev":
case "fat":
case "fuseblk":
case "fuseext2":
case "fusefat":
case "hfs":
case "hfsplus":
case "hpfs":
case "jbd":
case "jbd2":
case "jfs":
case "jffs":
case "jffs2":
case "minix":
case "minix_old":
case "minix2":
case "minix2v2":
case "msdos":
case "ocfs2":
case "omfs":
case "openprom":
case "ntfs":
case "qnx4":
case "reiserfs":
case "squashfs":
case "swap":
case "sysv":
case "ubifs":
case "udf":
case "ufs":
case "umsdos":
case "umview-mod-umfuseext2":
case "xenix":
case "xfs":
case "xiafs":
case "xmount":
case "zfs-fuse":
return DriveType.Fixed;

case "9p":
case "autofs":
case "autofs4":
case "beaglefs":
case "cifs":
case "coda":
case "coherent":
case "curlftpfs":
case "davfs2":
case "dlm":
case "flickrfs":
case "fusedav":
case "fusesmb":
case "gfs2":
case "glusterfs-client":
case "gmailfs":
case "kafs":
case "ltspfs":
case "ncpfs":
case "nfs":
case "nfs4":
case "obexfs":
case "s3ql":
case "smb":
case "smbfs":
case "sshfs":
case "sysfs":
case "sysv2":
case "sysv4":
case "vxfs":
case "wikipediafs":
return DriveType.Network;

case "anon_inodefs":
case "aptfs":
case "avfs":
case "bdev":
case "binfmt_misc":
case "cgroup":
case "configfs":
case "cramfs":
case "cryptkeeper":
case "cpuset":
case "debugfs":
case "devfs":
case "devpts":
case "devtmpfs":
case "encfs":
case "fuse":
case "fuse.gvfsd-fuse":
case "fusectl":
case "hugetlbfs":
case "libpam-encfs":
case "ibpam-mount":
case "mtpfs":
case "mythtvfs":
case "mqueue":
case "pipefs":
case "plptools":
case "proc":
case "pstore":
case "pytagsfs":
case "ramfs":
case "rofs":
case "romfs":
case "rootfs":
case "securityfs":
case "sockfs":
case "tmpfs":
return DriveType.Ram;

case "gphotofs":
case "usbfs":
case "usbdevice":
case "vfat":
return DriveType.Removable;

case "aufs": // marking all unions as unknown
case "funionfs":
case "unionfs-fuse":
case "mhddfs":
default:
return DriveType.Unknown;
}
}
}
}
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@stephentoub stephentoub Jun 29, 2016

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None of this code was changed at all, right? Just moved to a different file?

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@JeremyKuhne JeremyKuhne Jun 29, 2016

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That's correct

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