You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
libisofs/libisofs/libisofs.h

2702 lines
89 KiB

/*
* Copyright (c) 2007 Vreixo Formoso
*
* This file is part of the libisofs project; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation. See COPYING file for details.
*/
#ifndef LIBISO_LIBISOFS_H_
#define LIBISO_LIBISOFS_H_
/**
* These three release version numbers tell the revision of this header file
* and of the API it describes. They are memorized by applications at compile
* time.
*
* Before usage on your code, please read the usage discussion below.
*/
#define libisofs_header_version_major 0
#define libisofs_header_version_minor 6
#define libisofs_header_version_micro 1
/**
* Usage discussion:
*
* Some developers of the libburnia project have differing opinions how to
* ensure the compatibility of libaries and applications.
*
* It is about whether to use at compile time and at runtime the version
* numbers provided here. Thomas Schmitt advises to use them. Vreixo Formoso
* advises to use other means.
*
* At compile time:
*
* Vreixo Formoso advises to leave proper version matching to properly
* programmed checks in the the application's build system, which will
* eventually refuse compilation.
*
* Thomas Schmitt advises to use the macros defined here for comparison with
* the application's requirements of library revisions and to eventually
* break compilation.
*
* Both advises are combinable. I.e. be master of your build system and have
* #if checks in the source code of your application, nevertheless.
*
* At runtime (via iso_lib_is_compatible()):
*
* Vreixo Formoso advises to compare the application's requirements of
* library revisions with the runtime library. This is to allow runtime
* libraries which are young enough for the application but too old for
* the lib*.h files seen at compile time.
*
* Thomas Schmitt advises to compare the header revisions defined here with
* the runtime library. This is to enforce a strictly monotonous chain of
* revisions from app to header to library, at the cost of excluding some older
* libraries.
*
* These two advises are mutually exclusive.
*/
#include <sys/stat.h>
#include <stdint.h>
struct burn_source;
/**
* Context for image creation. It holds the files that will be added to image,
* and several options to control libisofs behavior.
*/
typedef struct Iso_Image IsoImage;
/*
* A node in the iso tree, i.e. a file that will be written to image.
*
* It can represent any kind of files. When needed, you can get the type with
* iso_node_get_type() and cast it to the appropiate subtype. Useful macros
* are provided, see below.
*/
typedef struct Iso_Node IsoNode;
15 years ago
/**
* A directory in the iso tree. It is an special type of IsoNode and can be
* casted to it in any case.
*/
typedef struct Iso_Dir IsoDir;
/**
* A symbolic link in the iso tree. It is an special type of IsoNode and can be
* casted to it in any case.
*/
typedef struct Iso_Symlink IsoSymlink;
/**
* A regular file in the iso tree. It is an special type of IsoNode and can be
* casted to it in any case.
*/
typedef struct Iso_File IsoFile;
/**
* An special file in the iso tree. This is used to represent any POSIX file
* other that regular files, directories or symlinks, i.e.: socket, block and
* character devices, and fifos.
* It is an special type of IsoNode and can be casted to it in any case.
*/
typedef struct Iso_Special IsoSpecial;
/**
* The type of an IsoNode.
*
* When an user gets an IsoNode from an image, (s)he can use
* iso_node_get_type() to get the current type of the node, and then
* cast to the appropriate subtype. For example:
*
* ...
* IsoNode *node;
* res = iso_dir_iter_next(iter, &node);
* if (res == 1 && iso_node_get_type(node) == LIBISO_DIR) {
* IsoDir *dir = (IsoDir *)node;
* ...
* }
*/
enum IsoNodeType {
LIBISO_DIR,
LIBISO_FILE,
LIBISO_SYMLINK,
LIBISO_SPECIAL,
LIBISO_BOOT
};
/* macros to check node type */
#define ISO_NODE_IS_DIR(n) (iso_node_get_type(n) == LIBISO_DIR)
#define ISO_NODE_IS_FILE(n) (iso_node_get_type(n) == LIBISO_FILE)
#define ISO_NODE_IS_SYMLINK(n) (iso_node_get_type(n) == LIBISO_SYMLINK)
#define ISO_NODE_IS_SPECIAL(n) (iso_node_get_type(n) == LIBISO_SPECIAL)
#define ISO_NODE_IS_BOOTCAT(n) (iso_node_get_type(n) == LIBISO_BOOT)
/* macros for safe downcasting */
#define ISO_DIR(n) ((IsoDir*)(ISO_NODE_IS_DIR(n) ? n : NULL))
#define ISO_FILE(n) ((IsoFile*)(ISO_NODE_IS_FILE(n) ? n : NULL))
#define ISO_SYMLINK(n) ((IsoSymlink*)(ISO_NODE_IS_SYMLINK(n) ? n : NULL))
#define ISO_SPECIAL(n) ((IsoSpecial*)(ISO_NODE_IS_SPECIAL(n) ? n : NULL))
#define ISO_NODE(n) ((IsoNode*)n)
/**
* Context for iterate on directory children.
* @see iso_dir_get_children()
*/
typedef struct Iso_Dir_Iter IsoDirIter;
/**
* It represents an El-Torito boot image.
*/
typedef struct el_torito_boot_image ElToritoBootImage;
/**
* An special type of IsoNode that acts as a placeholder for an El-Torito
* boot catalog. Once written, it will appear as a regular file.
*/
typedef struct Iso_Boot IsoBoot;
/**
* Flag used to hide a file in the RR/ISO or Joliet tree.
*
* \see iso_node_set_hidden
*/
enum IsoHideNodeFlag {
/** Hide the node in the ECMA-119 / RR tree */
LIBISO_HIDE_ON_RR = 1 << 0,
/** Hide the node in the Joliet tree, if Joliet extension are enabled */
LIBISO_HIDE_ON_JOLIET = 1 << 1,
/** Hide the node in the ISO-9660:1999 tree, if that format is enabled */
LIBISO_HIDE_ON_1999 = 1 << 2
};
/**
* El-Torito bootable image type.
*/
enum eltorito_boot_media_type {
ELTORITO_FLOPPY_EMUL,
ELTORITO_HARD_DISC_EMUL,
ELTORITO_NO_EMUL
};
/**
* Replace mode used when addding a node to a file.
* This controls how libisofs will act when you tried to add to a dir a file
* with the same name that an existing file.
*/
enum iso_replace_mode {
/**
* Never replace an existing node, and instead fail with
* ISO_NODE_NAME_NOT_UNIQUE.
*/
ISO_REPLACE_NEVER,
/**
* Always replace the old node with the new.
*/
ISO_REPLACE_ALWAYS,
/**
* Replace with the new node if it is the same file type
*/
ISO_REPLACE_IF_SAME_TYPE,
/**
* Replace with the new node if it is the same file type and its ctime
* is newer than the old one.
*/
ISO_REPLACE_IF_SAME_TYPE_AND_NEWER,
/**
* Replace with the new node if its ctime is newer than the old one.
*/
ISO_REPLACE_IF_NEWER
/*
* TODO #00006 define more values
* -if both are dirs, add contents (and what to do with conflicts?)
*/
};
/**
* Options for image written.
* @see iso_write_opts_new()
*/
typedef struct iso_write_opts IsoWriteOpts;
/**
* Options for image reading or import.
* @see iso_read_opts_new()
*/
typedef struct iso_read_opts IsoReadOpts;
/**
* Source for image reading.
*
* @see struct iso_data_source
*/
typedef struct iso_data_source IsoDataSource;
/**
* Data source used by libisofs for reading an existing image.
*
* It offers homogeneous read access to arbitrary blocks to different sources
* for images, such as .iso files, CD/DVD drives, etc...
*
* To create a multisession image, libisofs needs a IsoDataSource, that the
* user must provide. The function iso_data_source_new_from_file() constructs
* an IsoDataSource that uses POSIX I/O functions to access data. You can use
* it with regular .iso images, and also with block devices that represent a
* drive.
*/
struct iso_data_source
{
/* reserved for future usage, set to 0 */
int version;
/**
* Reference count for the data source. Should be 1 when a new source
* is created. Don't access it directly, but with iso_data_source_ref()
* and iso_data_source_unref() functions.
*/
unsigned int refcount;
/**
* Opens the given source. You must open() the source before any attempt
* to read data from it. The open is the right place for grabbing the
* underlying resources.
*
* @return
* 1 if success, < 0 on error
*/
int (*open)(IsoDataSource *src);
/**
* Close a given source, freeing all system resources previously grabbed in
* open().
*
* @return
* 1 if success, < 0 on error
*/
int (*close)(IsoDataSource *src);
/**
* Read an arbitrary block (2048 bytes) of data from the source.
*
* @param lba
* Block to be read.
* @param buffer
* Buffer where the data will be written. It should have at least
* 2048 bytes.
* @return
* 1 if success, < 0 on error
*/
int (*read_block)(IsoDataSource *src, uint32_t lba, uint8_t *buffer);
/**
* Clean up the source specific data. Never call this directly, it is
* automatically called by iso_data_source_unref() when refcount reach
* 0.
*/
void (*free_data)(IsoDataSource *);
/** Source specific data */
void *data;
};
/**
* Return information for image.
* Both size, hasRR and hasJoliet will be filled by libisofs with suitable
* values.
*/
struct iso_read_image_features
{
/**
* Will be filled with the size (in 2048 byte block) of the image, as
* reported in the PVM.
*/
uint32_t size;
/** It will be set to 1 if RR extensions are present, to 0 if not. */
unsigned int hasRR :1;
/** It will be set to 1 if Joliet extensions are present, to 0 if not. */
unsigned int hasJoliet :1;
/**
* It will be set to 1 if the image is an ISO 9660:1999, i.e. it has
* a version 2 Enhanced Volume Descriptor.
*/
unsigned int hasIso1999 :1;
/** It will be set to 1 if El-Torito boot record is present, to 0 if not.*/
unsigned int hasElTorito :1;
};
/**
* POSIX abstraction for source files.
*
* @see struct iso_file_source
*/
typedef struct iso_file_source IsoFileSource;
/**
* Abstract for source filesystems.
*
* @see struct iso_filesystem
*/
typedef struct iso_filesystem IsoFilesystem;
/**
* Interface that defines the operations (methods) available for an
* IsoFileSource.
*
* @see struct IsoFileSource_Iface
*/
typedef struct IsoFileSource_Iface IsoFileSourceIface;
/**
* IsoFilesystem implementation to deal with ISO images, and to offer a way to
* access specific information of the image, such as several volume attributes,
* extensions being used, El-Torito artifacts...
*/
typedef IsoFilesystem IsoImageFilesystem;
/**
* See IsoFilesystem->get_id() for info about this.
*/
extern unsigned int iso_fs_global_id;
/**
* An IsoFilesystem is a handler for a source of files, or a "filesystem".
* That is defined as a set of files that are organized in a hierarchical
* structure.
*
* A filesystem allows libisofs to access files from several sources in
* an homogeneous way, thus abstracting the underlying operations needed to
* access and read file contents. Note that this doesn't need to be tied
* to the disc filesystem used in the partition being accessed. For example,
* we have an IsoFilesystem implementation to access any mounted filesystem,
* using standard Linux functions. It is also legal, of course, to implement
* an IsoFilesystem to deal with a specific filesystem over raw partitions.
* That is what we do, for example, to access an ISO Image.
*
* Each file inside an IsoFilesystem is represented as an IsoFileSource object,
* that defines POSIX-like interface for accessing files.
*/
struct iso_filesystem
{
/**
* Type of filesystem.
* "file" -> local filesystem
* "iso " -> iso image filesystem
*/
char type[4];
/* reserved for future usage, set to 0 */
int version;
/**
* Get the root of a filesystem.
*
* @return
* 1 on success, < 0 on error
*/
int (*get_root)(IsoFilesystem *fs, IsoFileSource **root);
/**
* Retrieve a file from its absolute path inside the filesystem.
*
* @return
* 1 success, < 0 error
* Error codes:
* ISO_FILE_ACCESS_DENIED
* ISO_FILE_BAD_PATH
* ISO_FILE_DOESNT_EXIST
* ISO_MEM_ERROR
* ISO_FILE_ERROR
* ISO_NULL_POINTER
*/
int (*get_by_path)(IsoFilesystem *fs, const char *path,
IsoFileSource **file);
/**
* Get filesystem identifier.
*
* If the filesystem is able to generate correct values of the st_dev
* and st_ino fields for the struct stat of each file, this should
* return an unique number, greater than 0.
*
* To get a identifier for your filesystem implementation you should
* use iso_fs_global_id, incrementing it by one each time.
*
* Otherwise, if you can't ensure values in the struct stat are valid,
* this should return 0.
*/
unsigned int (*get_id)(IsoFilesystem *fs);
/**
* Opens the filesystem for several read operations. Calling this funcion
* is not needed at all, each time that the underlying system resource
* needs to be accessed, it is openned propertly.
* However, if you plan to execute several operations on the filesystem,
* it is a good idea to open it previously, to prevent several open/close
* operations to occur.
*
* @return 1 on success, < 0 on error
*/
int (*open)(IsoFilesystem *fs);
/**
* Close the filesystem, thus freeing all system resources. You should
* call this function if you have previously open() it.
* Note that you can open()/close() a filesystem several times.
*
* @return 1 on success, < 0 on error
*/
int (*close)(IsoFilesystem *fs);
/**
* Free implementation specific data. Should never be called by user.
* Use iso_filesystem_unref() instead.
*/
void (*free)(IsoFilesystem *fs);
/* internal usage, do never access them directly */
unsigned int refcount;
void *data;
};
/**
* Interface definition for an IsoFileSource. Defines the POSIX-like function
* to access files and abstract underlying source.
*/
struct IsoFileSource_Iface
{
/* reserved for future usage, set to 0 */
int version;
/**
* Get the path, relative to the filesystem this file source belongs to.
*
* @return
* the path of the FileSource inside the filesystem, it should be
* freed when no more needed.
*/
char* (*get_path)(IsoFileSource *src);
/**
* Get the name of the file, with the dir component of the path.
*
* @return
* the name of the file, it should be freed when no more needed.
*/
char* (*get_name)(IsoFileSource *src);
/**
* Get information about the file. It is equivalent to lstat(2).
*
* @return
* 1 success, < 0 error
* Error codes:
* ISO_FILE_ACCESS_DENIED
* ISO_FILE_BAD_PATH
* ISO_FILE_DOESNT_EXIST
* ISO_MEM_ERROR
* ISO_FILE_ERROR
* ISO_NULL_POINTER
*/
int (*lstat)(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).
*
* @return
* 1 success, < 0 error
* Error codes:
* ISO_FILE_ACCESS_DENIED
* ISO_FILE_BAD_PATH
* ISO_FILE_DOESNT_EXIST
* ISO_MEM_ERROR
* ISO_FILE_ERROR
* ISO_NULL_POINTER
*/
int (*stat)(IsoFileSource *src, struct stat *info);
/**
* 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.
*
* @return
* 1 if process has read access, < 0 on error
* Error codes:
* ISO_FILE_ACCESS_DENIED
* ISO_FILE_BAD_PATH
* ISO_FILE_DOESNT_EXIST
* ISO_MEM_ERROR
* ISO_FILE_ERROR
* ISO_NULL_POINTER
*/
int (*access)(IsoFileSource *src);
/**
* Opens the source.
* @return 1 on success, < 0 on error
* Error codes:
* ISO_FILE_ALREADY_OPENNED
* ISO_FILE_ACCESS_DENIED
* ISO_FILE_BAD_PATH
* ISO_FILE_DOESNT_EXIST
* ISO_MEM_ERROR
* ISO_FILE_ERROR
* ISO_NULL_POINTER
*/
int (*open)(IsoFileSource *src);
/**
* Close a previuously openned file
* @return 1 on success, < 0 on error
* Error codes:
* ISO_FILE_ERROR
* ISO_NULL_POINTER
* ISO_FILE_NOT_OPENNED
*/
int (*close)(IsoFileSource *src);
/**
* 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.
*
* @return
* number of bytes read, 0 if EOF, < 0 on error
* Error codes:
* ISO_FILE_ERROR
* ISO_NULL_POINTER
* ISO_FILE_NOT_OPENNED
* ISO_WRONG_ARG_VALUE -> if count == 0
* ISO_FILE_IS_DIR
* ISO_MEM_ERROR
* ISO_INTERRUPTED
*/
int (*read)(IsoFileSource *src, void *buf, size_t count);
/**
* 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.
*
* @param child
* pointer to be filled with the given child. Undefined on error or OEF
* @return
* 1 on success, 0 if EOF (no more children), < 0 on error
* Error codes:
* ISO_FILE_ERROR
* ISO_NULL_POINTER
* ISO_FILE_NOT_OPENNED
* ISO_FILE_IS_NOT_DIR
* ISO_MEM_ERROR
*/
int (*readdir)(IsoFileSource *src, IsoFileSource **child);
/**
* Read the destination of a symlink. You don't need to open the file
* to call this.
*
* @param buf
* allocated buffer of at least bufsiz bytes.
* The dest. will be copied there, and it will be NULL-terminated
* @param bufsiz
* characters to be copied. Destination link will be truncated if
* it is larger than given size. This include the \0 character.
* @return
* 1 on success, < 0 on error
* Error codes:
* ISO_FILE_ERROR
* ISO_NULL_POINTER
* ISO_WRONG_ARG_VALUE -> if bufsiz <= 0
* ISO_FILE_IS_NOT_SYMLINK
* ISO_MEM_ERROR
* ISO_FILE_BAD_PATH
* ISO_FILE_DOESNT_EXIST
*
*/
int (*readlink)(IsoFileSource *src, char *buf, size_t bufsiz);
/**
* Get the filesystem for this source. No extra ref is added, so you
* musn't unref the IsoFilesystem.
*
* @return
* The filesystem, NULL on error
*/
IsoFilesystem* (*get_filesystem)(IsoFileSource *src);
/**
* Free implementation specific data. Should never be called by user.
* Use iso_file_source_unref() instead.
*/
void (*free)(IsoFileSource *src);
/*
* TODO #00004 Add a get_mime_type() function.
* This can be useful for GUI apps, to choose the icon of the file
*/
};
/**
* An IsoFile Source is a POSIX abstraction of a file.
*/
struct iso_file_source
{
const IsoFileSourceIface *class;
int refcount;
void *data;
};
/**
* Initialize libisofs. You must call this before any usage of the library.
* @return 1 on success, < 0 on error
*/
int iso_init();
/**
* Finalize libisofs.
*/
void iso_finish();
/**
* Create a new image, empty.
*
* The image will be owned by you and should be unref() when no more needed.
*
* @param name
* Name of the image. This will be used as volset_id and volume_id.
* @param image
* Location where the image pointer will be stored.
* @return
* 1 sucess, < 0 error
*/
int iso_image_new(const char *name, IsoImage **image);
/**
* Get version of the libisofs library.
*/
void iso_lib_version(int *major, int *minor, int *micro);
/**
* Check if the library is ABI compatible with the given version.
*
* @return
* 1 lib is compatible, 0 is not.
*/
int iso_lib_is_compatible(int major, int minor, int micro);
/**
* Creates an IsoWriteOpts for writing an image. You should set the options
* desired with the correspondent setters.
*
* Options by default are determined by the selected profile. Fifo size is set
* by default to 2 MB.
*
* @param opts
* Pointer to the location where the newly created IsoWriteOpts will be
* stored. You should free it with iso_write_opts_free() when no more
* needed.
* @param profile
* Default profile for image creation. For now the following values are
* defined:
* ---> 0 [BASIC]
* No extensions are enabled, and ISO level is set to 1. Only suitable
* for usage for very old and limited systems (like MS-DOS), or by a
* start point from which to set your custom options.
* ---> 1 [BACKUP]
* POSIX compatibility for backup. Simple settings, ISO level is set to
* 2 and RR extensions are enabled. Useful for backup purposes.
* ---> 2 [DISTRIBUTION]
* Setting for information distribution. Both RR and Joliet are enabled
* to maximize compatibility with most systems. Permissions are set to
* default values, and timestamps to the time of recording.
* @return
* 1 success, < 0 error
*/
int iso_write_opts_new(IsoWriteOpts **opts, int profile);
/**
* Free an IsoWriteOpts previously allocated with iso_write_opts_new().
*/
void iso_write_opts_free(IsoWriteOpts *opts);
/**
* Set the ISO-9960 level to write at.
*
* @param level
* -> 1 for higher compatibility with old systems. With this level
* filenames are restricted to 8.3 characters.
* -> 2 to allow up to 31 filename characters.
* @return
* 1 success, < 0 error
*/
int iso_write_opts_set_iso_level(IsoWriteOpts *opts, int level);
/**
* Whether to use or not Rock Ridge extensions.
*
* This are standard extensions to ECMA-119, intended to add POSIX filesystem
* features to ECMA-119 images. Thus, usage of this flag is highly recommended
* for images used on GNU/Linux systems. With the usage of RR extension, the
* resulting image will have long filenames (up to 255 characters), deeper
* directory structure, POSIX permissions and owner info on files and
* directories, support for symbolic links or special files... All that
* attributes can be modified/setted with the appropiate function.
*
* @param enable
* 1 to enable RR extension, 0 to not add them
* @return
* 1 success, < 0 error
*/
int iso_write_opts_set_rockridge(IsoWriteOpts *opts, int enable);
/**
* Whether to add the non-standard Joliet extension to the image.
*
* This extensions are heavily used in Microsoft Windows systems, so if you
* plan to use your disc on such a system you should add this extension.
* Usage of Joliet supplies longer filesystem length (up to 64 unicode
* characters), and deeper directory structure.
*
* @param enable
* 1 to enable Joliet extension, 0 to not add them
* @return
* 1 success, < 0 error
*/
int iso_write_opts_set_joliet(IsoWriteOpts *opts, int enable);
/**
* Whether to use newer ISO-9660:1999 version.
*
* This is the second version of ISO-9660. It allows longer filenames and has
* less restrictions than old ISO-9660. However, nobody is using it so there
* are no much reasons to enable this.
*/
int iso_write_opts_set_iso1999(IsoWriteOpts *opts, int enable);
/**
* Omit the version number (";1") at the end of the ISO-9660 identifiers.
* This breaks ECMA-119 specification, but version numbers are usually not
* used, so it should work on most systems. Use with caution.
*/
int iso_write_opts_set_omit_version_numbers(IsoWriteOpts *opts, int omit);
/**
* Allow ISO-9660 directory hierarchy to be deeper than 8 levels.
* This breaks ECMA-119 specification. Use with caution.
*/
int iso_write_opts_set_allow_deep_paths(IsoWriteOpts *opts, int allow);
/**
* Allow path in the ISO-9660 tree to have more than 255 characters.
* This breaks ECMA-119 specification. Use with caution.
*/
int iso_write_opts_set_allow_longer_paths(IsoWriteOpts *opts, int allow);
/**
* Allow a single file or directory hierarchy to have up to 37 characters.
* This is larger than the 31 characters allowed by ISO level 2, and the
* extra space is taken from the version number, so this also forces
* omit_version_numbers.
* This breaks ECMA-119 specification and could lead to buffer overflow
* problems on old systems. Use with caution.
*/
int iso_write_opts_set_max_37_char_filenames(IsoWriteOpts *opts, int allow);
/**
* ISO-9660 forces filenames to have a ".", that separates file name from
* extension. libisofs adds it if original filename doesn't has one. Set
* this to 1 to prevent this behavior.
* This breaks ECMA-119 specification. Use with caution.
*/
int iso_write_opts_set_no_force_dots(IsoWriteOpts *opts, int no);
/**
* Allow lowercase characters in ISO-9660 filenames. By default, only
* uppercase characters, numbers and a few other characters are allowed.
* This breaks ECMA-119 specification. Use with caution.
*/
int iso_write_opts_set_allow_lowercase(IsoWriteOpts *opts, int allow);
/**
* Allow all ASCII characters to be appear on an ISO-9660 filename. Note
* that "/" and "\0" characters are never allowed, even in RR names.
* This breaks ECMA-119 specification. Use with caution.
*/
int iso_write_opts_set_allow_full_ascii(IsoWriteOpts *opts, int allow);
/**
* Allow paths in the Joliet tree to have more than 240 characters.
* This breaks Joliet specification. Use with caution.
*/
int iso_write_opts_set_joliet_longer_paths(IsoWriteOpts *opts, int allow);
/**
* Whether to sort files based on their weight.
*
* @see iso_node_set_sort_weight
*/
int iso_write_opts_set_sort_files(IsoWriteOpts *opts, int sort);
/**
* Whether to set default values for files and directory permissions, gid and
* uid. All these take one of three values: 0, 1 or 2.
*
* If 0, the corresponding attribute will be kept as setted in the IsoNode.
* Unless you have changed it, it corresponds to the value on disc, so it
* is suitable for backup purposes. If set to 1, the corresponding attrib.
* will be changed by a default suitable value. Finally, if you set it to
* 2, the attrib. will be changed with the value specified by the functioins
* below. Note that for mode attributes, only the permissions are set, the
* file type remains unchanged.
*
* @see iso_write_opts_set_default_dir_mode
* @see iso_write_opts_set_default_file_mode
* @see iso_write_opts_set_default_uid
* @see iso_write_opts_set_default_gid
*/
int iso_write_opts_set_replace_mode(IsoWriteOpts *opts, int dir_mode,
int file_mode, int uid, int gid);
/**
* Set the mode to use on dirs when you set the replace_mode of dirs to 2.
*
* @see iso_write_opts_set_replace_mode
*/
int iso_write_opts_set_default_dir_mode(IsoWriteOpts *opts, mode_t dir_mode);
/**
* Set the mode to use on files when you set the replace_mode of files to 2.
*
* @see iso_write_opts_set_replace_mode
*/
int iso_write_opts_set_default_file_mode(IsoWriteOpts *opts, mode_t file_mode);
/**
* Set the uid to use when you set the replace_uid to 2.
*
* @see iso_write_opts_set_replace_mode
*/
int iso_write_opts_set_default_uid(IsoWriteOpts *opts, uid_t uid);
/**
* Set the gid to use when you set the replace_gid to 2.
*
* @see iso_write_opts_set_replace_mode
*/
int iso_write_opts_set_default_gid(IsoWriteOpts *opts, gid_t gid);
/**
* 0 to use IsoNode timestamps, 1 to use recording time, 2 to use
* values from timestamp field. This has only meaning if RR extensions
* are enabled.
*
* @see iso_write_opts_set_default_timestamp
*/
int iso_write_opts_set_replace_timestamps(IsoWriteOpts *opts, int replace);
/**
* Set the timestamp to use when you set the replace_timestamps to 2.
*
* @see iso_write_opts_set_replace_timestamps
*/
int iso_write_opts_set_default_timestamp(IsoWriteOpts *opts, time_t timestamp);
/**
* Whether to always record timestamps in GMT.
*
* By default, libisofs stores local time information on image. You can set
* this to always store timestamps in GMT. This is useful if you want to hide
* your timezone, or you live in a timezone that can't be represented in
* ECMA-119. These are timezones whose offset from GMT is greater than +13
* hours, lower than -12 hours, or not a multiple of 15 minutes.
*/
int iso_write_opts_set_always_gmt(IsoWriteOpts *opts, int gmt);
/**
* Set the charset to use for the RR names of the files that will be created
* on the image.
* NULL to use default charset, that is the locale charset.
* You can obtain the list of charsets supported on your system executing
* "iconv -l" in a shell.
*/
int iso_write_opts_set_output_charset(IsoWriteOpts *opts, const char *charset);
/**
* Set the type of the image to create. Libisofs support two kind of images:
* stand-alone and appendable.
*
* A stand-alone image is an image that is valid alone, and that can be
* mounted by its own. This is the kind of image you will want to create
* in most cases. A stand-alone image can be burned in an empty CD or DVD,
* or write to an .iso file for future burning or distribution.
*
* On the other side, an appendable image is not self contained, it refers
* to serveral files that are stored outside the image. Its usage is for
* multisession discs, where you add data in a new session, while the
* previous session data can still be accessed. In those cases, the old
* data is not written again. Instead, the new image refers to it, and thus
* it's only valid when appended to the original. Note that in those cases
* the image will be written after the original, and thus you will want
* to use a ms_block greater than 0.
*
* Note that if you haven't import a previous image (by means of
* iso_image_import()), the image will always be a stand-alone image, as
* there is no previous data to refer to.
*
* @param appendable
* 1 to create an appendable image, 0 for an stand-alone one.
*/
int iso_write_opts_set_appendable(IsoWriteOpts *opts, int appendable);
/**
* Set the start block of the image. It is supposed to be the lba where the
* first block of the image will be written on disc. All references inside the
* ISO image will take this into account, thus providing a mountable image.
*
* For appendable images, that are written to a new session, you should
* pass here the lba of the next writable address on disc.
*
* In stand alone images this is usually 0. However, you may want to
* provide a different ms_block if you don't plan to burn the image in the
* first session on disc, such as in some CD-Extra disc whether the data
* image is written in a new session after some audio tracks.
*/
int iso_write_opts_set_ms_block(IsoWriteOpts *opts, uint32_t ms_block);
/**
* Sets the buffer where to store the descriptors that need to be written
* at the beginning of a overwriteable media to grow the image.
*
* @param overwrite
* When not NULL, it should point to a buffer of at least 64KiB, where
* libisofs will write the contents that should be written at the
* beginning of a overwriteable media, to grow the image. The growing
* of an image is a way, used by first time in growisofs by Andy Polyakov,
* to allow the appending of new data to non-multisession media, such
* as DVD+RW, in the same way you append a new session to a multisession
* disc, i.e., without need to write again the contents of the previous
* image.
*
* Note that if you want this kind of image growing, you will also need to
* set appendable to "1" and provide a valid ms_block after the previous
* image.
*
* You should initialize the buffer either with 0s, or with the contents of
* the first blocks of the image you're growing. In most cases, 0 is good
* enought.
*
* If you don't need this information, for example because you're creating a
* new image from scratch of because you will create an image for a true
* multisession media, just don't set this buffer or set it to NULL.
*/
int iso_write_opts_set_overwrite_buf(IsoWriteOpts *opts, uint8_t *overwrite);
/**