/** * \file * \brief Header: Virtual File System directory structure */ #ifndef MC__VFS_XDIRENTRY_H #define MC__VFS_XDIRENTRY_H #include #include #include "lib/global.h" /* GList */ #include "lib/vfs/path.h" /* vfs_path_t */ /*** typedefs(not structures) and defined constants **********************************************/ #define LINK_FOLLOW 15 #define LINK_NO_FOLLOW -1 /* For vfs_s_find_entry and vfs_s_find_inode */ #define FL_NONE 0 #define FL_MKDIR 1 #define FL_MKFILE 2 #define FL_DIR 4 /* For open_super */ #define FL_NO_OPEN 1 /* For vfs_s_entry_from_path */ #define FL_FOLLOW 1 #define FL_DIR 4 #define ERRNOR(a, b) do { me->verrno = a; return b; } while (0) #define VFS_SUBCLASS(a) ((struct vfs_s_subclass *) (a)) #define VFS_SUPER(a) ((struct vfs_s_super *) (a)) #define CONST_VFS_SUPER(a) ((const struct vfs_s_super *) (a)) #define VFS_ENTRY(a) ((struct vfs_s_entry *) (a)) #define VFS_INODE(a) ((struct vfs_s_inode *) (a)) #define VFS_FILE_HANDLER(a) ((vfs_file_handler_t *) a) #define VFS_FILE_HANDLER_SUPER(a) VFS_FILE_HANDLER (a)->ino->super /*** enums ***************************************************************************************/ typedef enum { LS_NOT_LINEAR = 0, LS_LINEAR_CLOSED = 1, LS_LINEAR_OPEN = 2, LS_LINEAR_PREOPEN = 3 } vfs_linear_state_t; /*** structures declarations (and typedefs of structures)*****************************************/ /* Single connection or archive */ struct vfs_s_super { struct vfs_class *me; struct vfs_s_inode *root; char *name; /* My name, whatever it means */ int fd_usage; /* Number of open files */ int ino_usage; /* Usage count of this superblock */ gboolean want_stale; /* If set, we do not flush cache properly */ #ifdef ENABLE_VFS_NET vfs_path_element_t *path_element; #endif /* ENABLE_VFS_NET */ }; /* * Single virtual file - directory entry. The same inode can have many * entries (i.e. hard links), but usually has only one. */ struct vfs_s_entry { struct vfs_s_inode *dir; /* Directory we are in, i.e. our parent */ char *name; /* Name of this entry */ struct vfs_s_inode *ino; /* ... and its inode */ ssize_t leading_spaces; /* number of leading spases in the file name */ }; /* Single virtual file - inode */ struct vfs_s_inode { struct vfs_s_super *super; /* Archive the file is on */ struct vfs_s_entry *ent; /* Our entry in the parent directory - use only for directories because they cannot be hardlinked */ GQueue *subdir; /* If this is a directory, its entry. List of vfs_s_entry */ struct stat st; /* Parameters of this inode */ char *linkname; /* Symlink's contents */ char *localname; /* Filename of local file, if we have one */ gint64 timestamp; /* Subclass specific */ off_t data_offset; /* Subclass specific */ void *user_data; /* Subclass specific */ }; /* Data associated with an open file */ typedef struct { struct vfs_s_inode *ino; off_t pos; /* This is for module's use */ int handle; /* This is for module's use, but if != -1, will be mc_close()d */ gboolean changed; /* Did this file change? */ vfs_linear_state_t linear; /* Is that file open with O_LINEAR? */ } vfs_file_handler_t; /* * One of our subclasses (tar, cpio, shell, ftpfs) with data and methods. * Extends vfs_class. */ struct vfs_s_subclass { struct vfs_class base; /* base class */ GList *supers; int inode_counter; dev_t rdev; /* *INDENT-OFF* */ int (*init_inode) (struct vfs_class * me, struct vfs_s_inode * ino); /* optional */ void (*free_inode) (struct vfs_class * me, struct vfs_s_inode * ino); /* optional */ int (*init_entry) (struct vfs_class * me, struct vfs_s_entry * entry); /* optional */ void *(*archive_check) (const vfs_path_t * vpath); /* optional */ int (*archive_same) (const vfs_path_element_t * vpath_element, struct vfs_s_super * psup, const vfs_path_t * vpath, void *cookie); struct vfs_s_super *(*new_archive) (struct vfs_class * me); int (*open_archive) (struct vfs_s_super * psup, const vfs_path_t * vpath, const vfs_path_element_t * vpath_element); void (*free_archive) (struct vfs_class * me, struct vfs_s_super * psup); vfs_file_handler_t *(*fh_new) (struct vfs_s_inode * ino, gboolean changed); int (*fh_open) (struct vfs_class * me, vfs_file_handler_t * fh, int flags, mode_t mode); int (*fh_close) (struct vfs_class * me, vfs_file_handler_t * fh); void (*fh_free) (vfs_file_handler_t * fh); struct vfs_s_entry *(*find_entry) (struct vfs_class * me, struct vfs_s_inode * root, const char *path, int follow, int flags); int (*dir_load) (struct vfs_class * me, struct vfs_s_inode * ino, const char *path); gboolean (*dir_uptodate) (struct vfs_class * me, struct vfs_s_inode * ino); int (*file_store) (struct vfs_class * me, vfs_file_handler_t * fh, char *path, char *localname); int (*linear_start) (struct vfs_class * me, vfs_file_handler_t * fh, off_t from); ssize_t (*linear_read) (struct vfs_class * me, vfs_file_handler_t * fh, void *buf, size_t len); void (*linear_close) (struct vfs_class * me, vfs_file_handler_t * fh); /* *INDENT-ON* */ }; /*** global variables defined in .c file *********************************************************/ /*** declarations of public functions ************************************************************/ /* entries and inodes */ struct vfs_s_inode *vfs_s_new_inode (struct vfs_class *me, struct vfs_s_super *super, struct stat *initstat); void vfs_s_free_inode (struct vfs_class *me, struct vfs_s_inode *ino); struct vfs_s_entry *vfs_s_new_entry (struct vfs_class *me, const char *name, struct vfs_s_inode *inode); void vfs_s_free_entry (struct vfs_class *me, struct vfs_s_entry *ent); void vfs_s_insert_entry (struct vfs_class *me, struct vfs_s_inode *dir, struct vfs_s_entry *ent); int vfs_s_entry_compare (const void *a, const void *b); struct stat *vfs_s_default_stat (struct vfs_class *me, mode_t mode); struct vfs_s_entry *vfs_s_generate_entry (struct vfs_class *me, const char *name, struct vfs_s_inode *parent, mode_t mode); struct vfs_s_inode *vfs_s_find_inode (struct vfs_class *me, const struct vfs_s_super *super, const char *path, int follow, int flags); struct vfs_s_inode *vfs_s_find_root (struct vfs_class *me, struct vfs_s_entry *entry); /* outside interface */ void vfs_init_subclass (struct vfs_s_subclass *sub, const char *name, vfs_flags_t flags, const char *prefix); const char *vfs_s_get_path (const vfs_path_t * vpath, struct vfs_s_super **archive, int flags); struct vfs_s_super *vfs_get_super_by_vpath (const vfs_path_t * vpath); void vfs_s_invalidate (struct vfs_class *me, struct vfs_s_super *super); char *vfs_s_fullpath (struct vfs_class *me, struct vfs_s_inode *ino); void vfs_s_init_fh (vfs_file_handler_t * fh, struct vfs_s_inode *ino, gboolean changed); /* network filesystems support */ int vfs_s_select_on_two (int fd1, int fd2); int vfs_s_get_line (struct vfs_class *me, int sock, char *buf, int buf_len, char term); int vfs_s_get_line_interruptible (struct vfs_class *me, char *buffer, int size, int fd); /* misc */ int vfs_s_retrieve_file (struct vfs_class *me, struct vfs_s_inode *ino); void vfs_s_normalize_filename_leading_spaces (struct vfs_s_inode *root_inode, size_t final_filepos); /*** inline functions ****************************************************************************/ static inline void vfs_s_store_filename_leading_spaces (struct vfs_s_entry *entry, size_t position) { entry->leading_spaces = (ssize_t) position; } #endif