static IEnumerable <(string Path, string Name, Result <Stat, FsException> Stat)> Ret(IntPtr dir, string path)
{
var dirent = new Dirent();
while (true)
{
var res = Syscall.readdir_r(dir, dirent, out var resDirent);
if (res != 0)
{
throw new FsException("Failed to read directory entry", path);
}
if (resDirent == NullPtr)
{
break;
}
if (dirent.d_name == "." || dirent.d_name == "..")
{
continue;
}
var newPath = Path.Join(path, dirent.d_name);
if (Syscall.stat(newPath, out var stat) != 0)
{
yield return(newPath, dirent.d_name, new FsException("Failed to stat", path));
}
yield return(newPath, dirent.d_name, stat);
}
}
private FileType GetKind(Dirent e)
{
switch ((DirentType)e.d_type)
{
case DirentType.DT_DIR:
return(FileType.Directory);
case DirentType.DT_LNK:
return(FileType.Symlink);
case DirentType.DT_REG:
return(FileType.File);
case DirentType.DT_BLK:
return(FileType.BlockDevice);
case DirentType.DT_CHR:
return(FileType.CharDevice);
default:
return(FileType.Unsupported);
}
//return FileType.Unsupported;
}
private Dirent readDirent()
{
var ret = new Dirent()
{
ino = _stream.ReadInt32LE(),
type = _stream.ReadInt32LE(),
namelen = _stream.ReadInt32LE(),
entsize = _stream.ReadUInt32LE()
};
ret.name = _stream.ReadASCIINullTerminated(ret.namelen);
_stream.Position = (_stream.Position + 7) & (~7L);
return(ret);
}
public PosixFile(Dirent entry)
{
unixEntry = entry; // used for clone()
this.SnapFullPath = entry.d_name;
this.Name = this.SnapFullPath.Substring(this.SnapFullPath.LastIndexOf('/') + 1);
ID = (long)entry.d_ino;
this.Kind = GetKind(entry);
//this.IsSparse = false;
// try to get ID version (inode generation number), for easier delete/move/renames detection
// EOPNOTSUP = 95
Stat entryStat;
if (this.Kind != FileType.Symlink)
{
//Syscall.fstat(fd, out entryStat);
Syscall.stat(this.SnapFullPath, out entryStat);
string[] xattrs = new string[16];
Syscall.listxattr(this.SnapFullPath, out xattrs);
GetXattrs(xattrs);
}
else
{
Syscall.lstat(this.SnapFullPath, out entryStat);
System.Text.StringBuilder sb = new System.Text.StringBuilder(2048);
Syscall.readlink(this.SnapFullPath, sb);
this.TargetName = sb.ToString();
//Console.WriteLine ("symlink pointing to "+targetName);
}
//this.LastAccessedTime = Utils.GetDateTimeFromUnixTime(entryStat.st_atime);
this.LastMetadataModifiedTime = entryStat.st_ctime;
this.LastModifiedTime = entryStat.st_mtime;
this.CreateTime = 0; //DateTime.MinValue.ToFileTimeUtc();
this.Permissions = (uint)entryStat.st_mode;
if (this.Kind == FileType.File) // though dirs also have sizes, useless to get it
{
this.FileSize = entryStat.st_size;
}
this.OwnerUser = entryStat.st_uid;
this.OwnerGroup = entryStat.st_gid;
this.SpecialAttributes = 0; // TODO!!!
BlockMetadata = new FileBlockMetadata();
//Syscall.close(fd);
}
private static Dirent[] GetEntries(IntPtr dirp, Regex regex)
{
int num;
IntPtr intPtr;
ArrayList arrayLists = new ArrayList();
do
{
Dirent dirent = new Dirent();
num = Syscall.readdir_r(dirp, dirent, out intPtr);
if (num != 0 || !(intPtr != IntPtr.Zero) || !regex.Match(dirent.d_name).Success || !(dirent.d_name != ".") || !(dirent.d_name != ".."))
{
continue;
}
arrayLists.Add(dirent);
}while (num == 0 && intPtr != IntPtr.Zero);
if (num != 0)
{
UnixMarshal.ThrowExceptionForLastError();
}
return((Dirent[])arrayLists.ToArray(typeof(Dirent)));
}
unsafe static IList <DirectoryEntry> Scan(string path, bool recurse, Predicate <string> cb_shouldskipdir)
{
if (recurse)
{
bool first = true;
IntPtr str = Marshal.StringToHGlobalAnsi(path);
try
{
IntPtr[] arr = new IntPtr[] { str, IntPtr.Zero };
IntPtr handle;
fixed(IntPtr *arg = arr)
handle = fts_open(new IntPtr(arg), FTS_NOCHDIR | FTS_PHYSICAL, IntPtr.Zero);
if (handle == IntPtr.Zero)
{
throw new Exception("failed to fts_open");
}
try
{
FTSENT *ent = fts_read(handle);
if (ent == null)
{
return(__empty);
}
List <DirectoryEntry> ret = new List <DirectoryEntry>();
while (ent != null)
{
//Console.WriteLine("ent: " + ent->ToString());
bool isfile;
if (ent->fts_info == FTS_F)
{
isfile = true;
}
else if (ent->fts_info == FTS_D)
{
isfile = false;
}
else
{
ent = fts_read(handle);
continue;
}
bool skip = false;
string fullpath = Marshal.PtrToStringAnsi(ent->fts_path);
if (!isfile && cb_shouldskipdir != null)
{
if (cb_shouldskipdir != null && cb_shouldskipdir(fullpath))
{
fts_set(handle, ent, FTS_SKIP);
skip = true;
}
}
if (!skip)
{
if (first)
{
first = false;
}
else
{
long mtime = (long)ent->fts_statp->st_mtimespec.tv_sec;
ret.Add(new DirectoryEntry(fullpath, mtime, isfile));
}
}
ent = fts_read(handle);
}
return(ret);
}
finally
{
fts_close(handle);
}
}
finally
{
Marshal.FreeHGlobal(str);
}
}
else
{
#if !HAVE_MONO_POSIX
// I've verified that this returns the exact same timestamps as the other branch of code
// on linux + mac. In theory, this should perform just as well, but unsure. We can optimize
// further later with p/invoke if necessary
var ret = new List <DirectoryEntry>();
DirectoryInfo info = new DirectoryInfo(path);
foreach (var entry in info.EnumerateFileSystemInfos())
{
var attrs = entry.Attributes & ~(FileAttributes.Hidden | FileAttributes.ReadOnly);
if ((attrs & FileAttributes.Directory) != 0)
{
ret.Add(new DirectoryEntry(path, entry.FullName, 0, false));
}
else
{
ret.Add(new DirectoryEntry(path, entry.FullName, (entry.LastWriteTimeUtc.Ticks - EPOCH_TICKS) / 10000000, true));
}
}
return(ret);
#else
var ret = new List <DirectoryEntry>();
IntPtr dirp = Syscall.opendir(path);
if (dirp == IntPtr.Zero)
{
throw new Exception("opendir: error " + Stdlib.GetLastError());
}
try
{
do
{
Dirent d = Syscall.readdir(dirp);
if (d == null)
{
Errno rc = Stdlib.GetLastError();
if (rc == Errno.ENOENT || rc == 0)
{
break; // done
}
throw new Exception("readdir: error " + rc);
}
if (d.d_type == READDIR_ISFILE)
{
Stat st;
string fn = Path.Combine(path, d.d_name);
if (Syscall.stat(fn, out st) != 0)
{
throw new Exception("stat \"" + fn + "\": error " + Stdlib.GetLastError());
}
ret.Add(new DirectoryEntry(path, d.d_name, st.st_mtime, true));
}
else if (d.d_type == READDIR_ISDIRECTORY)
{
if (d.d_name == "." || d.d_name == "..")
{
continue;
}
ret.Add(new DirectoryEntry(path, d.d_name, 0, false));
}
}while (dirp != IntPtr.Zero);
}
finally
{
Syscall.closedir(dirp);
}
return(ret);
#endif
}
}
