/// <inheritdoc />
public bool HasWritableAccessControl(string path)
{
Contract.Requires(!string.IsNullOrWhiteSpace(path));
int result = s_fileSystem.GetFilePermission(path, false, true);
FilePermissions permissions = checked ((FilePermissions)result);
return(permissions.HasFlag(FilePermissions.S_IWUSR) ||
permissions.HasFlag(FilePermissions.S_IWGRP) ||
permissions.HasFlag(FilePermissions.S_IWOTH));
}
/// <inheritdoc />
public bool HasWritableAccessControl(string path)
{
Contract.Requires(!string.IsNullOrWhiteSpace(path));
int result = GetFilePermissionsForFilePath(path);
if (result < 0)
{
throw new BuildXLException(I($"Failed to get permissions for file '{path}' - error: {Marshal.GetLastWin32Error()}"));
}
FilePermissions permissions = checked ((FilePermissions)result);
return(permissions.HasFlag(FilePermissions.S_IWUSR) ||
permissions.HasFlag(FilePermissions.S_IWGRP) ||
permissions.HasFlag(FilePermissions.S_IWOTH));
}
public static StoragePermissions GetOtherPermissions(FilePermissions filePermissions)
{
var p = StoragePermissions.None;
if (filePermissions.HasFlag(FilePermissions.S_IROTH))
{
p |= StoragePermissions.Read;
}
if (filePermissions.HasFlag(FilePermissions.S_IWOTH))
{
p |= StoragePermissions.Write;
}
if (filePermissions.HasFlag(FilePermissions.S_IXOTH))
{
p |= StoragePermissions.Execute;
}
return(p);
}
public static StoragePermissions GetGroupPermissions(FilePermissions filePermissions)
{
var p = StoragePermissions.None;
if (filePermissions.HasFlag(FilePermissions.S_IRGRP))
{
p |= StoragePermissions.Read;
}
if (filePermissions.HasFlag(FilePermissions.S_IWGRP))
{
p |= StoragePermissions.Write;
}
if (filePermissions.HasFlag(FilePermissions.S_IXGRP))
{
p |= StoragePermissions.Execute;
}
return(p);
}
private static bool IsSymlink(string path)
{
var mode = TryGetFilePermission(path, followSymlink: false, throwOnFailure: false);
if (mode < 0)
{
return(false);
}
FilePermissions permissions = checked ((FilePermissions)mode);
return(permissions.HasFlag(FilePermissions.S_IFLNK));
}
/// <inheritdoc />
public Possible <PathExistence, NativeFailure> TryProbePathExistence(string path, bool followSymlink)
{
var mode = GetFilePermission(path, followSymlink: false, throwOnFailure: false);
if (mode < 0)
{
return(PathExistence.Nonexistent);
}
if (followSymlink)
{
return(Directory.Exists(path)
? PathExistence.ExistsAsDirectory
: PathExistence.ExistsAsFile);
}
else
{
FilePermissions permissions = checked ((FilePermissions)mode);
return
(permissions.HasFlag(FilePermissions.S_IFDIR) ? PathExistence.ExistsAsDirectory :
permissions.HasFlag(FilePermissions.S_IFLNK) ? PathExistence.ExistsAsFile :
PathExistence.ExistsAsFile);
}
}
static UnixExternalPermissions MapToUnixExternalPermissions(FilePermissions fp)
{
UnixExternalPermissions filePermissions = 0;
if (fp.HasFlag(FilePermissions.S_ISUID))
{
filePermissions |= UnixExternalPermissions.ISUID;
}
if (fp.HasFlag(FilePermissions.S_ISGID))
{
filePermissions |= UnixExternalPermissions.ISGID;
}
if (fp.HasFlag(FilePermissions.S_ISVTX))
{
filePermissions |= UnixExternalPermissions.ISVTX;
}
if (fp.HasFlag(FilePermissions.S_IRUSR))
{
filePermissions |= UnixExternalPermissions.IRUSR;
}
if (fp.HasFlag(FilePermissions.S_IWUSR))
{
filePermissions |= UnixExternalPermissions.IWUSR;
}
if (fp.HasFlag(FilePermissions.S_IXUSR))
{
filePermissions |= UnixExternalPermissions.IXUSR;
}
if (fp.HasFlag(FilePermissions.S_IRGRP))
{
filePermissions |= UnixExternalPermissions.IRGRP;
}
if (fp.HasFlag(FilePermissions.S_IWGRP))
{
filePermissions |= UnixExternalPermissions.IWGRP;
}
if (fp.HasFlag(FilePermissions.S_IXGRP))
{
filePermissions |= UnixExternalPermissions.IXGRP;
}
if (fp.HasFlag(FilePermissions.S_IROTH))
{
filePermissions |= UnixExternalPermissions.IROTH;
}
if (fp.HasFlag(FilePermissions.S_IWOTH))
{
filePermissions |= UnixExternalPermissions.IWOTH;
}
if (fp.HasFlag(FilePermissions.S_IXOTH))
{
filePermissions |= UnixExternalPermissions.IXOTH;
}
if (filePermissions == 0)
{
return((UnixExternalPermissions)FilePermissions.DEFFILEMODE);
}
return(filePermissions);
}