tapefs from plan9

src/cmd/tapefs/tapefs.h

@@ -0,0 +1,95 @@
+#define getpass tapefs_getpass
+
+#define	g2byte(x)	(((x)[1]<<8) + (x)[0])		/* little-endian */
+#define	g3byte(x)	(((x)[2]<<16) + ((x)[1]<<8) + (x)[0])
+#define	g4byte(x)	(((x)[3]<<24) + ((x)[2]<<16) + ((x)[1]<<8) + (x)[0])
+
+enum
+{
+	OPERM	= 0x3,		/* mask of all permission types in open mode */
+	Nram	= 512,
+	Maxbuf	= 8192,		/* max buffer size */
+};
+
+typedef struct Fid Fid;
+typedef struct Ram Ram;
+
+struct Fid
+{
+	short	busy;
+	short	open;
+	short	rclose;
+	int	fid;
+	Fid	*next;
+	char	*user;
+	Ram	*ram;
+};
+
+struct Ram
+{
+	char	busy;
+	char	open;
+	char	replete;
+	Ram	*parent;	/* parent directory */
+	Ram	*child;		/* first member of directory */
+	Ram	*next;		/* next member of file's directory */
+	Qid	qid;
+	long	perm;
+	char	*name;
+	ulong	atime;
+	ulong	mtime;
+	char	*user;
+	char	*group;
+	vlong addr;
+	void *data;
+	long	ndata;
+};
+
+enum
+{
+	Pexec =		1,
+	Pwrite = 	2,
+	Pread = 	4,
+	Pother = 	1,
+	Pgroup = 	8,
+	Powner =	64,
+};
+
+typedef struct idmap {
+	char	*name;
+	int	id;
+} Idmap;
+
+typedef struct fileinf {
+	char	*name;
+	vlong	addr;
+	void	*data;
+	vlong	size;
+	int	mode;
+	int	uid;
+	int	gid;
+	long	mdate;
+} Fileinf;
+
+extern	ulong	path;		/* incremented for each new file */
+extern	Ram	*ram;
+extern	char	*user;
+extern	Idmap	*uidmap;
+extern	Idmap	*gidmap;
+extern	int	replete;
+void	error(char*);
+void	*erealloc(void*, ulong);
+void	*emalloc(ulong);
+char	*estrdup(char*);
+void	populate(char *);
+void	dotrunc(Ram*);
+void	docreate(Ram*);
+char	*doread(Ram*, vlong, long);
+void	dowrite(Ram*, char*, long, long);
+int	dopermw(Ram*);
+Idmap	*getpass(char*);
+char	*mapid(Idmap*,int);
+Ram	*poppath(Fileinf fi, int new);
+Ram	*popfile(Ram *dir, Fileinf fi);
+void	popdir(Ram*);
+Ram	*lookup(Ram*, char*);