/// <summary>
/// Parses a string in octal format to PathPermissions.
/// </summary>
/// <param name="s">Octal string to parse.</param>
/// <returns><see cref="PathPermissions"/>.</returns>
public static PathPermissions ParseOctalPermissions(string s)
{
if (s == null)
{
return(null);
}
if (s.Length != 4)
{
throw DataLakeErrors.PathPermissionsOctalInvalidLength(s);
}
var pathPermissions = new PathPermissions();
if (s[0] == '0')
{
pathPermissions.StickyBit = false;
}
else if (s[0] == '1')
{
pathPermissions.StickyBit = true;
}
else
{
throw DataLakeErrors.PathPermissionsOctalInvalidFirstDigit(s);
}
pathPermissions.Owner = PathAccessControlExtensions.ParseOctalRolePermissions(s[1]);
pathPermissions.Group = PathAccessControlExtensions.ParseOctalRolePermissions(s[2]);
pathPermissions.Other = PathAccessControlExtensions.ParseOctalRolePermissions(s[3]);
return(pathPermissions);
}
/// <summary>
/// Parses a symbolic string to PathPermissions.
/// </summary>
/// <param name="s">String to parse.</param>
/// <returns><see cref="PathPermissions"/>.</returns>
public static PathPermissions ParseSymbolicPermissions(string s)
{
if (s == null)
{
return(null);
}
if (s.Length != 9 && s.Length != 10)
{
throw DataLakeErrors.PathPermissionsSymbolicInvalidLength(s);
}
var pathPermissions = new PathPermissions();
// Set sticky bit
if (char.ToLower(s[8], CultureInfo.InvariantCulture) == 't')
{
pathPermissions.StickyBit = true;
}
else
{
pathPermissions.StickyBit = false;
}
// Set extended info in ACL
if (s.Length == 10)
{
if (s[9] == '+')
{
pathPermissions.ExtendedAcls = true;
}
else
{
throw Errors.InvalidFormat(nameof(s));
}
}
else
{
pathPermissions.ExtendedAcls = false;
}
pathPermissions.Owner = PathAccessControlExtensions.ParseSymbolicRolePermissions(s.Substring(0, 3), allowStickyBit: false);
pathPermissions.Group = PathAccessControlExtensions.ParseSymbolicRolePermissions(s.Substring(3, 3), allowStickyBit: false);
pathPermissions.Other = PathAccessControlExtensions.ParseSymbolicRolePermissions(s.Substring(6, 3), allowStickyBit: true);
return(pathPermissions);
}
/// <summary>
/// Parses the provided string into a <see cref="PathAccessControlItem"/>
/// </summary>
/// <param name="s">The string representation of the access control list.</param>
/// <returns>A <see cref="PathAccessControlItem"/>.</returns>
public static PathAccessControlItem Parse(string s)
{
if (s == null)
{
return(null);
}
PathAccessControlItem entry = new PathAccessControlItem();
string[] parts = s.Split(':');
int indexOffset = 0;
if (parts.Length < 3 || parts.Length > 4)
{
throw DataLakeErrors.PathAccessControlItemStringInvalidLength(s);
}
if (parts.Length == 4)
{
if (!parts[0].Equals("default", StringComparison.OrdinalIgnoreCase))
{
throw DataLakeErrors.PathAccessControlItemStringInvalidPrefix(s);
}
entry.DefaultScope = true;
indexOffset = 1;
}
entry.AccessControlType = ParseAccesControlType(parts[indexOffset]);
if (!string.IsNullOrEmpty(parts[1 + indexOffset]))
{
entry.EntityId = parts[1 + indexOffset];
}
entry.Permissions = PathAccessControlExtensions.ParseSymbolicRolePermissions(parts[2 + indexOffset], false);
return(entry);
}