Add . and .. support to kernel filesystems.

This makes the hack in ls(1) not needed and is hence removed.

sortix/fs/devfs.cpp

@@ -302,7 +302,7 @@ namespace Sortix
 
 	int DevDevFSDir::Read(sortix_dirent* dirent, size_t available)
 	{
-		const char* names[] = { "null", "tty", "video", "vga" };
+		const char* names[] = { ".", "..", "null", "tty", "video", "vga" };
 		const char* name = NULL;
 		if ( position < DeviceFS::GetNumDevices() )
 		{

sortix/fs/initfs.cpp

@@ -191,9 +191,6 @@ namespace Sortix
 		size_t namelen = String::Length(name);
 		size_t needed = sizeof(sortix_dirent) + namelen + 1;
 
-		// Oh right, the kernel is stupid and doesn't support dot and dotdot.
-		if ( name[0] == '.' ) { position++; return Read(dirent, available); }
-
 		if ( available < needed )
 		{
 			dirent->d_namelen = needed;

sortix/fs/ramfs.cpp

@@ -341,22 +341,30 @@ namespace Sortix
 
 	size_t DevRAMFS::GetNumFiles()
 	{
-		size_t result = BINDEVHACK ? 2 : 0;
+		size_t result = 2 + (BINDEVHACK ? 2 : 0);
 		if ( files ) { result += files->Length(); }
 		return result;
 	}
 
 	const char* DevRAMFS::GetFilename(size_t index)
 	{
-		switch ( BINDEVHACK ? index : 2 )
+		switch ( index )
+		{
+		case 0: return ".";
+		case 1: return "..";
+		default: index -= 2;
+		}
+		if ( BINDEVHACK ) switch ( index )
 		{
 		case 0: return "bin";
 		case 1: return "dev";
+		default: index -= 2;
 		}
-		size_t filesindex = BINDEVHACK ? index - 2 : index;
-		if ( !files ) { return NULL; }
-		if ( files->Length() <= filesindex ) { return NULL; }
-		DevRAMFSFile* file = files->Get(filesindex);
+		if ( !files )
+			return NULL;
+		if ( files->Length() <= index )
+			return NULL;
+		DevRAMFSFile* file = files->Get(index);
 		return file->name;
 	}
 }

sortix/fs/videofs.cpp

@@ -200,12 +200,24 @@ Device* MakeFB(int flags, mode_t /*mode*/)
 	return new DevFrameBuffer();
 }
 
+Device* MakeDot(int /*flags*/, mode_t /*mode*/)
+{
+	return NULL;
+}
+
+Device* MakeDotDot(int /*flags*/, mode_t /*mode*/)
+{
+	return NULL;
+}
+
 struct
 {
 	const char* name;
 	Device* (*factory)(int, mode_t);
 } nodes[] =
 {
+	{ ".", MakeDot },
+	{ "..", MakeDotDot },
 	{ "mode", MakeMode },
 	{ "modes", MakeModes },
 	{ "supports", MakeSupports },

utils/ls.cpp

@@ -99,11 +99,6 @@ int ls(const char* path)
 	DIR* dir = opendir(path);
 	if ( !dir ) { finishoutput(); error(0, errno, "%s", path); return 2; }
 
-#if defined(sortix)
-	handleentry(path, ".");
-	handleentry(path, "..");
-#endif
-
 	struct dirent* entry;
 	while ( (entry = readdir(dir)) )
 	{