+extern int ad_setfuid (const uid_t );
+extern uid_t ad_getfuid (void );
+extern char *ad_dir (const char *);
+extern char *ad_path (const char *, int);
+extern char *ad_path_osx (const char *, int);
+extern char *ad_path_ads (const char *, int);
+extern char *ad_path_sfm (const char *, int);
+extern int ad_mode (const char *, int);
+extern int ad_mkdir (const char *, int);
+extern void ad_init (struct adouble *, int, int );
+extern int ad_open (const char *, int, int, int, struct adouble *);
+extern int ad_openat (int dirfd, const char *, int, int, int, struct adouble *);
+extern int ad_refresh (struct adouble *);
+extern int ad_stat (const char *, struct stat *);
+extern int ad_metadata (const char *, int, struct adouble *);
+extern int ad_metadataat (int, const char *, int, struct adouble *);
+
+#define ad_open_metadata(name, flags, mode, adp)\
+ ad_open(name, ADFLAGS_MD|(flags), O_RDWR |(mode), 0666, (adp))
+
+#define ad_close_metadata(adp) ad_close( (adp), ADFLAGS_MD)
+
+/* build a resource fork mode from the data fork mode:
+ * remove X mode and extend header to RW if R or W (W if R for locking),
+ */
+static inline mode_t ad_hf_mode (mode_t mode)
+{
+ mode &= ~(S_IXUSR | S_IXGRP | S_IXOTH);
+ /* fnctl lock need write access */
+ if ((mode & S_IRUSR))
+ mode |= S_IWUSR;
+ if ((mode & S_IRGRP))
+ mode |= S_IWGRP;
+ if ((mode & S_IROTH))
+ mode |= S_IWOTH;
+
+ /* if write mode set add read mode */
+ if ((mode & S_IWUSR))
+ mode |= S_IRUSR;
+ if ((mode & S_IWGRP))
+ mode |= S_IRGRP;
+ if ((mode & S_IWOTH))
+ mode |= S_IROTH;
+
+ return mode;
+}
+
+/* ad_ea.c */
+ssize_t sys_getxattr (const char *path, const char *name, void *value, size_t size);
+ssize_t sys_lgetxattr (const char *path, const char *name, void *value, size_t size);
+ssize_t sys_fgetxattr (int filedes, const char *name, void *value, size_t size);
+ssize_t sys_listxattr (const char *path, char *list, size_t size);
+ssize_t sys_llistxattr (const char *path, char *list, size_t size);
+ssize_t sys_flistxattr (int filedes, char *list, size_t size);
+int sys_removexattr (const char *path, const char *name);
+int sys_lremovexattr (const char *path, const char *name);
+int sys_fremovexattr (int filedes, const char *name);
+int sys_setxattr (const char *path, const char *name, const void *value, size_t size, int flags);
+int sys_lsetxattr (const char *path, const char *name, const void *value, size_t size, int flags);
+int sys_fsetxattr (int filedes, const char *name, const void *value, size_t size, int flags);
+int sys_copyxattr (const char *src, const char *dst);