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-rw-r--r--lib/vfs/xdirentry.h204
1 files changed, 204 insertions, 0 deletions
diff --git a/lib/vfs/xdirentry.h b/lib/vfs/xdirentry.h
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+++ b/lib/vfs/xdirentry.h
@@ -0,0 +1,204 @@
+
+/**
+ * \file
+ * \brief Header: Virtual File System directory structure
+ */
+
+
+#ifndef MC__VFS_XDIRENTRY_H
+#define MC__VFS_XDIRENTRY_H
+
+#include <stdio.h>
+#include <sys/types.h>
+
+#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 */
+};
+
+/* 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, fish, 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
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-21 15:08:25 +0000