1 files changed, 241 insertions, 0 deletions
diff --git a/squashfs-tools/xattr.h b/squashfs-tools/xattr.h
new file mode 100644
index 0000000..0697f83
--- /dev/null
+++ b/squashfs-tools/xattr.h
@@ -0,0 +1,241 @@
+#ifndef XATTR_H
+#define XATTR_H
+/*
+ * Create a squashfs filesystem.  This is a highly compressed read only
+ * filesystem.
+ *
+ * Copyright (c) 2010, 2012, 2013, 2014, 2019, 2021, 2022
+ * Phillip Lougher <phillip@squashfs.org.uk>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2,
+ * or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * xattr.h
+ */
+
+#define XATTR_VALUE_OOL		SQUASHFS_XATTR_VALUE_OOL
+#define XATTR_PREFIX_MASK	SQUASHFS_XATTR_PREFIX_MASK
+
+#define XATTR_VALUE_OOL_SIZE	sizeof(long long)
+
+/* maximum size of xattr value data that will be inlined */
+#define XATTR_INLINE_MAX 	128
+
+/* the target size of an inode's xattr name:value list.  If it
+ * exceeds this, then xattr value data will be successively out of lined
+ * until it meets the target */
+#define XATTR_TARGET_MAX	65536
+
+#define IS_XATTR(a)		(a != SQUASHFS_INVALID_XATTR)
+
+#define PREFIX_BASE64_0S	(0x3000 + 0x53)
+#define PREFIX_BASE64_0s	(0x3000 + 0x73)
+#define PREFIX_BINARY_0B	(0x3000 + 0x42)
+#define PREFIX_BINARY_0b	(0x3000 + 0x62)
+#define PREFIX_HEX_0X		(0x3000 + 0x58)
+#define PREFIX_HEX_0x		(0x3000 + 0x78)
+#define PREFIX_TEXT_0T		(0x3000 + 0x54)
+#define PREFIX_TEXT_0t		(0x3000 + 0x74)
+
+struct xattr_list {
+	char			*name;
+	char			*full_name;
+	int			size;
+	int			vsize;
+	void			*value;
+	int			type;
+	long long		ool_value;
+	unsigned short		vchecksum;
+	struct xattr_list	*vnext;
+};
+
+struct dupl_id {
+	struct xattr_list	*xattr_list;
+	int			xattrs;
+	int			xattr_id;
+	struct dupl_id		*next;
+};
+
+struct prefix {
+	char			*prefix;
+	int			type;
+};
+
+struct xattr_add {
+	char			*name;
+	char			*value;
+	unsigned int		vsize;
+	int			type;
+	struct xattr_add	*next;
+};
+
+extern int generate_xattrs(int, struct xattr_list *);
+
+#ifdef XATTR_SUPPORT
+extern int get_xattrs(int, struct squashfs_super_block *);
+extern int read_xattrs(void *, int type);
+extern long long write_xattrs();
+extern void save_xattrs();
+extern void restore_xattrs();
+extern unsigned int xattr_bytes, total_xattr_bytes;
+extern int write_xattr(char *, unsigned int);
+extern unsigned int read_xattrs_from_disk(int, struct squashfs_super_block *, int, long long *);
+extern struct xattr_list *get_xattr(int, unsigned int *, int *);
+extern void free_xattr(struct xattr_list *, int);
+extern regex_t *xattr_regex(char *pattern, char *option);
+extern void xattrs_add(char *str);
+extern void sort_xattr_add_list(void);
+extern char *base64_decode(char *source, int size, int *bytes);
+extern int add_xattrs(void);
+extern struct xattr_add *xattr_parse(char *, char *, char *);
+extern int read_pseudo_xattr(char *orig_def, char *filename, char *name, char *def);
+extern void print_xattr(char *, unsigned int, int);
+extern int has_xattrs(unsigned int);
+#else
+#include "squashfs_swap.h"
+
+static inline int get_xattrs(int fd, struct squashfs_super_block *sBlk)
+{
+	if(sBlk->xattr_id_table_start != SQUASHFS_INVALID_BLK) {
+		fprintf(stderr, "Xattrs in filesystem! These are not "
+			"supported on this build of Mksquashfs\n");
+		return 0;
+	} else
+		return SQUASHFS_INVALID_BLK;
+}
+
+
+static inline int read_xattrs(void *dir_ent, int type)
+{
+	return SQUASHFS_INVALID_XATTR;
+}
+
+
+static inline long long write_xattrs()
+{
+	return SQUASHFS_INVALID_BLK;
+}
+
+
+static inline void save_xattrs()
+{
+}
+
+
+static inline void restore_xattrs()
+{
+}
+
+
+static inline int write_xattr(char *pathname, unsigned int xattr)
+{
+	return 1;
+}
+
+
+static inline unsigned int read_xattrs_from_disk(int fd, struct squashfs_super_block *sBlk, int sanity_only, long long *table_start)
+{
+	int res;
+	struct squashfs_xattr_table id_table;
+
+	/*
+	 * Read sufficient xattr metadata to obtain the start of the xattr
+	 * metadata on disk (table_start).  This value is needed to do
+	 * sanity checking of the filesystem.
+	 */
+	res = read_fs_bytes(fd, sBlk->xattr_id_table_start, sizeof(id_table), &id_table);
+	if(res == 0)
+		return 0;
+
+	SQUASHFS_INSWAP_XATTR_TABLE(&id_table);
+
+	/*
+	 * id_table.xattr_table_start stores the start of the compressed xattr
+	 * metadata blocks.  This by definition is also the end of the previous
+	 * filesystem table - the id lookup table.
+	 */
+	if(table_start != NULL)
+		*table_start = id_table.xattr_table_start;
+
+	return id_table.xattr_ids;
+}
+
+
+static inline struct xattr_list *get_xattr(int i, unsigned int *count, int j)
+{
+	return NULL;
+}
+
+static inline regex_t *xattr_regex(char *pattern, char *option)
+{
+	return NULL;
+}
+
+static inline void xattrs_add(char *str)
+{
+}
+
+static inline void sort_xattr_add_list(void)
+{
+}
+
+static inline int add_xattrs(void)
+{
+	return 0;
+}
+
+static inline struct xattr_add *xattr_parse(char *a, char *b, char *c)
+{
+	return NULL;
+}
+
+
+static inline int read_pseudo_xattr(char *orig_def, char *filename, char *name, char *def)
+{
+	free(filename);
+	fprintf(stderr, "Xattrs are unsupported in this build\n");
+
+	return 0;
+}
+
+
+static inline void print_xattr(char *pathname, unsigned int xattr, int writer_fd)
+{
+}
+
+
+static inline int has_xattrs(unsigned int xattr)
+{
+	return 0;
+}
+#endif
+
+#ifdef XATTR_SUPPORT
+#define xattrs_supported() TRUE
+#ifdef XATTR_DEFAULT
+#define NOXOPT_STR
+#define XOPT_STR " (default)"
+#define XATTR_DEF 0
+#else
+#define NOXOPT_STR " (default)"
+#define XOPT_STR
+#define XATTR_DEF 1
+#endif
+#else
+#define xattrs_supported() FALSE
+#define NOXOPT_STR " (default)"
+#define XOPT_STR " (unsupported)"
+#define XATTR_DEF 1
+#endif
+#endif