#include <libisofs.h>
Defines the POSIX-like function to access files and abstract underlying source.
Definition at line 445 of file libisofs.h.
Data Fields | |
int | version |
char *(* | get_path )(IsoFileSource *src) |
Get the path, relative to the filesystem this file source belongs to. | |
char *(* | get_name )(IsoFileSource *src) |
Get the name of the file, with the dir component of the path. | |
int(* | lstat )(IsoFileSource *src, struct stat *info) |
Get information about the file. | |
int(* | stat )(IsoFileSource *src, struct stat *info) |
Get information about the file. | |
int(* | access )(IsoFileSource *src) |
Check if the process has access to read file contents. | |
int(* | open )(IsoFileSource *src) |
Opens the source. | |
int(* | close )(IsoFileSource *src) |
Close a previuously openned file. | |
int(* | read )(IsoFileSource *src, void *buf, size_t count) |
Attempts to read up to count bytes from the given source into the buffer starting at buf. | |
int(* | readdir )(IsoFileSource *src, IsoFileSource **child) |
Read a directory. | |
int(* | readlink )(IsoFileSource *src, char *buf, size_t bufsiz) |
Read the destination of a symlink. | |
IsoFilesystem *(* | get_filesystem )(IsoFileSource *src) |
Get the filesystem for this source. | |
void(* | free )(IsoFileSource *src) |
Free implementation specific data. | |
off_t(* | lseek )(IsoFileSource *src, off_t offset, int flag) |
Repositions the offset of the IsoFileSource (must be opened) to the given offset according to the value of flag. |
Definition at line 448 of file libisofs.h.
char*(* IsoFileSource_Iface::get_path)(IsoFileSource *src) |
Get the path, relative to the filesystem this file source belongs to.
char*(* IsoFileSource_Iface::get_name)(IsoFileSource *src) |
Get the name of the file, with the dir component of the path.
int(* IsoFileSource_Iface::lstat)(IsoFileSource *src, struct stat *info) |
Get information about the file.
It is equivalent to lstat(2).
int(* IsoFileSource_Iface::stat)(IsoFileSource *src, struct stat *info) |
Get information about the file.
If the file is a symlink, the info returned refers to the destination. It is equivalent to stat(2).
int(* IsoFileSource_Iface::access)(IsoFileSource *src) |
Check if the process has access to read file contents.
Note that this is not necessarily related with (l)stat functions. For example, in a filesystem implementation to deal with an ISO image, if the user has read access to the image it will be able to read all files inside it, despite of the particular permission of each file in the RR tree, that are what the above functions return.
int(* IsoFileSource_Iface::open)(IsoFileSource *src) |
Opens the source.
int(* IsoFileSource_Iface::close)(IsoFileSource *src) |
Close a previuously openned file.
int(* IsoFileSource_Iface::read)(IsoFileSource *src, void *buf, size_t count) |
Attempts to read up to count bytes from the given source into the buffer starting at buf.
The file src must be open() before calling this, and close() when no more needed. Not valid for dirs. On symlinks it reads the destination file.
int(* IsoFileSource_Iface::readdir)(IsoFileSource *src, IsoFileSource **child) |
Read a directory.
Each call to this function will return a new children, until we reach the end of file (i.e, no more children), in that case it returns 0.
The dir must be open() before calling this, and close() when no more needed. Only valid for dirs.
Note that "." and ".." children MUST NOT BE returned.
child | pointer to be filled with the given child. Undefined on error or OEF |
int(* IsoFileSource_Iface::readlink)(IsoFileSource *src, char *buf, size_t bufsiz) |
Read the destination of a symlink.
You don't need to open the file to call this.
buf | allocated buffer of at least bufsiz bytes. The dest. will be copied there, and it will be NULL-terminated | |
bufsiz | characters to be copied. Destination link will be truncated if it is larger than given size. This include the character. |
Get the filesystem for this source.
No extra ref is added, so you musn't unref the IsoFilesystem.
void(* IsoFileSource_Iface::free)(IsoFileSource *src) |
Free implementation specific data.
Should never be called by user. Use iso_file_source_unref() instead.
off_t(* IsoFileSource_Iface::lseek)(IsoFileSource *src, off_t offset, int flag) |
Repositions the offset of the IsoFileSource (must be opened) to the given offset according to the value of flag.
offset | in bytes | |
flag | 0 The offset is set to offset bytes (SEEK_SET) 1 The offset is set to its current location plus offset bytes (SEEK_CUR) 2 The offset is set to the size of the file plus offset bytes (SEEK_END). |