1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
|
/**
* \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 */
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
|
