static FtpListItem ParseUnixList(string buf, FtpCapability capabilities)
{
string regex =
@"(?<permissions>.+)\s+" +
@"(?<objectcount>\d+)\s+" +
@"(?<user>.+)\s+" +
@"(?<group>.+)\s+" +
@"(?<size>\d+)\s+" +
@"(?<modify>\w+\s+\d+\s+\d+:\d+|\w+\s+\d+\s+\d+)\s" +
@"(?<name>.*)$";
FtpListItem item = new FtpListItem();
Match m;
if (!(m = Regex.Match(buf, regex, RegexOptions.IgnoreCase)).Success)
return null;
// if this field is missing we can't determine
// what the object is.
if (m.Groups["permissions"].Value.Length == 0)
return null;
switch (m.Groups["permissions"].Value[0]) {
case 'd':
item.Type = FtpFileSystemObjectType.Directory;
break;
case '-':
case 's':
item.Type = FtpFileSystemObjectType.File;
break;
case 'l':
item.Type = FtpFileSystemObjectType.Link;
break;
default:
return null;
}
// if we can't determine a file name then
// we are not considering this a successful parsing operation.
if (m.Groups["name"].Value.Length < 1)
return null;
item.Name = m.Groups["name"].Value;
switch (item.Type) {
case FtpFileSystemObjectType.Directory:
// ignore these...
if (item.Name == "." || item.Name == "..")
return null;
break;
case FtpFileSystemObjectType.Link:
if (!item.Name.Contains(" -> "))
return null;
item.LinkTarget = item.Name.Remove(0, item.Name.IndexOf("-> ") + 3);
item.Name = item.Name.Remove(item.Name.IndexOf(" -> "));
break;
}
////
// Ignore the Modify times sent in LIST format for files
// when the server has support for the MDTM command
// because they will never be as accurate as what can be had
// by using the MDTM command. MDTM does not work on directories
// so if a modify time was parsed from the listing we will try
// to convert it to a DateTime object and use it for directories.
////
if (((capabilities & FtpCapability.MDTM) != FtpCapability.MDTM || item.Type == FtpFileSystemObjectType.Directory) && m.Groups["modify"].Value.Length > 0)
item.Modified = m.Groups["modify"].Value.GetFtpDate(DateTimeStyles.AssumeLocal);
if (m.Groups["size"].Value.Length > 0) {
long size;
if (long.TryParse(m.Groups["size"].Value, out size))
item.Size = size;
}
if (m.Groups["permissions"].Value.Length > 0) {
Match perms = Regex.Match(m.Groups["permissions"].Value,
@"[\w-]{1}(?<owner>[\w-]{3})(?<group>[\w-]{3})(?<others>[\w-]{3})",
RegexOptions.IgnoreCase);
if (perms.Success) {
if (perms.Groups["owner"].Value.Length == 3) {
if (perms.Groups["owner"].Value[0] == 'r')
item.OwnerPermissions |= FtpPermission.Read;
if (perms.Groups["owner"].Value[1] == 'w')
item.OwnerPermissions |= FtpPermission.Write;
if (perms.Groups["owner"].Value[2] == 'x' || perms.Groups["owner"].Value[2] == 's')
item.OwnerPermissions |= FtpPermission.Execute;
if (perms.Groups["owner"].Value[2] == 's' || perms.Groups["owner"].Value[2] == 'S')
item.SpecialPermissions |= FtpSpecialPermissions.SetUserID;
}
if (perms.Groups["group"].Value.Length == 3) {
if (perms.Groups["group"].Value[0] == 'r')
item.GroupPermissions |= FtpPermission.Read;
if (perms.Groups["group"].Value[1] == 'w')
item.GroupPermissions |= FtpPermission.Write;
if (perms.Groups["group"].Value[2] == 'x' || perms.Groups["group"].Value[2] == 's')
item.GroupPermissions |= FtpPermission.Execute;
if (perms.Groups["group"].Value[2] == 's' || perms.Groups["group"].Value[2] == 'S')
item.SpecialPermissions |= FtpSpecialPermissions.SetGroupID;
}
if (perms.Groups["others"].Value.Length == 3) {
if (perms.Groups["others"].Value[0] == 'r')
item.OthersPermissions |= FtpPermission.Read;
if (perms.Groups["others"].Value[1] == 'w')
item.OthersPermissions |= FtpPermission.Write;
if (perms.Groups["others"].Value[2] == 'x' || perms.Groups["others"].Value[2] == 't')
item.OthersPermissions |= FtpPermission.Execute;
if (perms.Groups["others"].Value[2] == 't' || perms.Groups["others"].Value[2] == 'T')
item.SpecialPermissions |= FtpSpecialPermissions.Sticky;
}
}
}
return item;
}