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/*
* 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_
#include <sys/stat.h>
#include <stdint.h>
struct burn_source;
typedef struct Iso_Image IsoImage;
typedef struct Iso_Node IsoNode;
typedef struct Iso_Dir IsoDir;
typedef struct Iso_Symlink IsoSymlink;
typedef struct Iso_File IsoFile;
typedef struct Iso_Special IsoSpecial;
typedef struct Iso_Dir_Iter IsoDirIter;
typedef struct el_torito_boot_image ElToritoBootImage;
typedef struct Iso_Boot IsoBoot;
/**
* 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
};
/**
* Flag used to hide a file in the RR/ISO or Joliet tree.
*
* \see iso_node_set_hidden
*/
enum IsoHideNodeFlag {
LIBISO_HIDE_ON_RR = 1 << 0,
LIBISO_HIDE_ON_JOLIET = 1 << 1
};
/**
* 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.
* TODO comment
*/
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
/*
* TODO #00006 define more values
* -to replace only if both are the same kind of file
* -if both are dirs, add contents (and what to do with conflicts?)
*/
};
/**
* Holds the options for the image generation.
*/
typedef struct
{
int level; /**< ISO level to write at. */
/** Which extensions to support. */
unsigned int rockridge :1;
unsigned int joliet :1;
/*
* Relaxed constraints. Setting any of these to 1 break the specifications,
* but it is supposed to work on most moderns systems. Use with caution.
*/
/**
* Omit the version number (";1") at the end of the ISO-9660 identifiers.
* Version numbers are usually not used.
*/
unsigned int omit_version_numbers :1;
/**
* Allow ISO-9660 directory hierarchy to be deeper than 8 levels.
*/
unsigned int allow_deep_paths :1;
/**
* Allow path in the ISO-9660 tree to have more than 255 characters.
*/
unsigned int allow_longer_paths :1;
/**
* 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.
*/
unsigned int max_37_char_filenames :1;
/**
* 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
*/
unsigned int no_force_dots :1;
/**
* Allow lowercase characters in ISO-9660 filenames. By default, only
* uppercase characters, numbers and a few other characters are allowed.
*/
unsigned int allow_lowercase :1;
/**
* Allow all ASCII characters to be appear on an ISO-9660 filename. Note
* that "/" and "\0" characters are never allowed, even in RR names.
*/
unsigned int allow_full_ascii :1;
/**
* Allow paths in the Joliet tree to have more than 240 characters.
*/
unsigned int joliet_longer_paths :1;
/**< If files should be sorted based on their weight. */
unsigned int sort_files :1;
/**
* The following options set the 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 in the options
* below. Note that for mode attributes, only the permissions are set, the
* file type remains unchanged.
*/
unsigned int replace_dir_mode :2;
unsigned int replace_file_mode :2;
unsigned int replace_uid :2;
unsigned int replace_gid :2;
mode_t dir_mode; /** Mode to use on dirs when replace_dir_mode == 2. */
mode_t file_mode; /** Mode to use on files when replace_file_mode == 2. */
uid_t uid; /** uid to use when replace_uid == 2. */
gid_t gid; /** gid to use when replace_gid == 2. */
/**
* Charset for the RR filenames that will be created.
* NULL to use default charset, the locale one.
*/
char *output_charset;
/**
* This flags control 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.
*/
unsigned int appendable : 1;
/**
* 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.
*/
uint32_t ms_block;
/**
* 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.
*/
uint8_t *overwrite;
/**
* Size, in number of blocks, of the FIFO buffer used between the writer
* thread and the burn_source. You have to provide at least a 32 blocks
* buffer.
*/
size_t fifo_size;
} Ecma119WriteOpts;
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 {
/**
* 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;
};
/**
* Options for image reading.
* There are four kind of options:
* - Related to multisession support.
* In most cases, an image begins at LBA 0 of the data source. However,
* in multisession discs, the later image begins in the last session on
* disc. The block option can be used to specify the start of that last
* session.
* - Related to the tree that will be read.
* As default, when Rock Ridge extensions are present in the image, that
* will be used to get the tree. If RR extensions are not present, libisofs
* will use the Joliet extensions if available. Finally, the plain ISO-9660
* tree is used if neither RR nor Joliet extensions are available. With
* norock, nojoliet, and preferjoliet options, you can change this
* default behavior.
* - Related to default POSIX attributes.
* When Rock Ridege extensions are not used, libisofs can't figure out what
* are the the permissions, uid or gid for the files. You should supply
* default values for that.
*/
struct iso_read_opts
{
/**
* Block where the image begins, usually 0, can be different on a
* multisession disc.
*/
uint32_t block;
unsigned int norock : 1; /*< Do not read Rock Ridge extensions */
unsigned int nojoliet : 1; /*< Do not read Joliet extensions */
/**
* When both Joliet and RR extensions are present, the RR tree is used.
* If you prefer using Joliet, set this to 1.
*/
unsigned int preferjoliet : 1;
uid_t uid; /**< Default uid when no RR */
gid_t gid; /**< Default uid when no RR */
mode_t mode; /**< Default mode when no RR (only permissions) */
//TODO differ file and dir mode
//option to convert names to lower case?
/**
* Input charset for RR file names. NULL to use default locale charset.
*/
char *input_charset;
};
/**
* Return information for image.
* Both size, hasRR and hasJoliet will be filled by libisofs with suitable
* values.
*/
struct iso_read_image_features
{
/** 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 El-Torito boot record is present, to 0 if not.*/
unsigned int hasElTorito :1;
/**
* Will be filled with the size (in 2048 byte block) of the image, as
* reported in the PVM.
*/
uint32_t size;
};
/**
* 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);
/**
* Create a burn_source to actually write the image. That burn_source can be
* used with libburn as a data source for a track.
*
* @param image
* The image to write.
* @param opts
* The options for image generation.
* @param burn_src
* Location where the pointer to the burn_source will be stored
* @return
* 1 on success, < 0 on error
*/
int iso_image_create_burn_source(IsoImage *image, Ecma119WriteOpts *opts,
struct burn_source **burn_src);
/**
* Import a previous session or image, for growing or modify.
*
* @param image
* The image context to which old image will be imported. Note that all
* files added to image, and image attributes, will be replaced with the
* contents of the old image. TODO support for merging old image files
* @param src
* Data Source from which old image will be read. A extra reference is
* added, so you still need to iso_data_source_unref() yours.
* @param opts
* Options for image import
* @param features
* Will be filled with the features of the old image. You can pass NULL
* if you're not interested on them.
* @return
* 1 on success, < 0 on error
*/
int iso_image_import(IsoImage *image, IsoDataSource *src,
struct iso_read_opts *opts,
struct iso_read_image_features *features);
/**
* Increments the reference counting of the given image.
*/
void iso_image_ref(IsoImage *image);
/**
* Decrements the reference couting of the given image.
* If it reaches 0, the image is free, together with its tree nodes (whether
* their refcount reach 0 too, of course).
*/
void iso_image_unref(IsoImage *image);
/**
* Get the root directory of the image.
* No extra ref is added to it, so you musn't unref it. Use iso_node_ref()
* if you want to get your own reference.
*/
IsoDir *iso_image_get_root(const IsoImage *image);
/**
* Fill in the volset identifier for a image.
*/
void iso_image_set_volset_id(IsoImage *image, const char *volset_id);
/**
* Get the volset identifier.
* The returned string is owned by the image and should not be freed nor
* changed.
*/
const char *iso_image_get_volset_id(const IsoImage *image);
/**
* Fill in the volume identifier for a image.
*/
void iso_image_set_volume_id(IsoImage *image, const char *volume_id);
/**
* Get the volume identifier.
* The returned string is owned by the image and should not be freed nor
* changed.
*/
const char *iso_image_get_volume_id(const IsoImage *image);
/**
* Fill in the publisher for a image.
*/
void iso_image_set_publisher_id(IsoImage *image, const char *publisher_id);
/**
* Get the publisher of a image.
* The returned string is owned by the image and should not be freed nor
* changed.
*/
const char *iso_image_get_publisher_id(const IsoImage *image);
/**
* Fill in the data preparer for a image.
*/
void iso_image_set_data_preparer_id(IsoImage *image,
const char *data_preparer_id);
/**
* Get the data preparer of a image.
* The returned string is owned by the image and should not be freed nor
* changed.
*/
const char *iso_image_get_data_preparer_id(const IsoImage *image);
/**
* Fill in the system id for a image. Up to 32 characters.
*/
void iso_image_set_system_id(IsoImage *image, const char *system_id);
/**
* Get the system id of a image.
* The returned string is owned by the image and should not be freed nor
* changed.
*/
const char *iso_image_get_system_id(const IsoImage *image);
/**
* Fill in the application id for a image. Up to 128 chars.
*/
void iso_image_set_application_id(IsoImage *image, const char *application_id);
/**
* Get the application id of a image.
* The returned string is owned by the image and should not be freed nor
* changed.
*/
const char *iso_image_get_application_id(const IsoImage *image);
/**
* Fill copyright information for the image. Usually this refers
* to a file on disc. Up to 37 characters.
*/
void iso_image_set_copyright_file_id(IsoImage *image,
const char *copyright_file_id);
/**
* Get the copyright information of a image.
* The returned string is owned by the image and should not be freed nor
* changed.
*/
const char *iso_image_get_copyright_file_id(const IsoImage *image);
/**
* Fill abstract information for the image. Usually this refers
* to a file on disc. Up to 37 characters.
*/
void iso_image_set_abstract_file_id(IsoImage *image,
const char *abstract_file_id);
/**
* Get the abstract information of a image.
* The returned string is owned by the image and should not be freed nor
* changed.
*/
const char *iso_image_get_abstract_file_id(const IsoImage *image);
/**
* Fill biblio information for the image. Usually this refers
* to a file on disc. Up to 37 characters.
*/
void iso_image_set_biblio_file_id(IsoImage *image, const char *biblio_file_id);
/**
* Get the biblio information of a image.
* The returned string is owned by the image and should not be freed nor
* changed.
*/
const char *iso_image_get_biblio_file_id(const IsoImage *image);
/**
* Create a bootable image by adding a El-Torito boot image.
*
* This also add a catalog boot node to the image filesystem tree.
*
* @param image
* The image to make bootable. If it was already bootable this function
* returns an error and the image remains unmodified.
* @param image_path
* The path on the image tree of a regular file to use as default boot
* image.
* @param type
* The boot media type. This can be one of 3 types:
* - Floppy emulation: Boot image file must be exactly
* 1200 kB, 1440 kB or 2880 kB.
* - Hard disc emulation: The image must begin with a master
* boot record with a single image.
* - No emulation. You should specify load segment and load size
* of image.
* @param catalog_path
* The path on the image tree where the catalog will be stored. The
* directory component of this path must be a directory existent on the
* image tree, and the filename component must be unique among all
* children of that directory on image. Otherwise a correspodent error
* code will be returned. This function will add an IsoBoot node that acts
* as a placeholder for the real catalog, that will be generated at image
* creation time.
* @param boot
* Location where a pointer to the added boot image will be stored. That
* object is owned by the IsoImage and should not be freed by the user,
* nor dereferenced once the last reference to the IsoImage was disposed
* via iso_image_unref(). A NULL value is allowed if you don't need a
* reference to the boot image.
* @return
* 1 on success, < 0 on error
*/
int iso_image_set_boot_image(IsoImage *image, const char *image_path,
enum eltorito_boot_media_type type,
const char *catalog_path,
ElToritoBootImage **boot);
//TODO add support for "hidden" bootable images.
/**
* Get El-Torito boot image of an ISO image, if any.
*
* This can be useful, for example, to check if a volume read from a previous
* session or an existing image is bootable. It can also be useful to get
* the image and catalog tree nodes. An application would want those, for
* example, to prevent the user removing it.
*
* Both nodes are owned by libisofs and should not be freed. You can get your
* own ref with iso_node_ref(). You can can also check if the node is already
* on the tree by getting its parent (note that when reading El-Torito info
* from a previous image, the nodes might not be on the tree even if you haven't
* removed them). Remember that you'll need to get a new ref
* (with iso_node_ref()) before inserting them again to the tree, and probably
* you will also need to set the name or permissions.
*
* @param image
* The image from which to get the boot image.
* @param boot
* If not NULL, it will be filled with a pointer to the boot image, if
* any. That object is owned by the IsoImage and should not be freed by
* the user, nor dereferenced once the last reference to the IsoImage was
* disposed via iso_image_unref().
* @param imgnode
* When not NULL, it will be filled with the image tree node. No extra ref
* is added, you can use iso_node_ref() to get one if you need it.
* @param catnode
* When not NULL, it will be filled with the catnode tree node. No extra
* ref is added, you can use iso_node_ref() to get one if you need it.
* @return
* 1 on success, 0 is the image is not bootable (i.e., it has no El-Torito
* image), < 0 error.
*/
int iso_image_get_boot_image(IsoImage *image, ElToritoBootImage **boot,
IsoFile **imgnode, IsoBoot **catnode);
/**
* Removes the El-Torito bootable image.
*
* The IsoBoot node that acts as placeholder for the catalog is also removed
* for the image tree, if there.
* If the image is not bootable (don't have el-torito boot image) this function
* just returns.
*/
void iso_image_remove_boot_image(IsoImage *image);
/**
* Sets the load segment for the initial boot image. This is only for
* no emulation boot images, and is a NOP for other image types.
*/
void el_torito_set_load_seg(ElToritoBootImage *bootimg, short segment);
/**
* Sets the number of sectors (512b) to be load at load segment during
* the initial boot procedure. This is only for
* no emulation boot images, and is a NOP for other image types.
*/
void el_torito_set_load_size(ElToritoBootImage *bootimg, short sectors);
/**
* Marks the specified boot image as not bootable
*/
void el_torito_set_no_bootable(ElToritoBootImage *bootimg);
/**
* Specifies that this image needs to be patched. This involves the writting
* of a 56 bytes boot information table at offset 8 of the boot image file.
* The original boot image file won't be modified.
* This is needed for isolinux boot images.
*/
void el_torito_patch_isolinux_image(ElToritoBootImage *bootimg);
/**
* Increments the reference counting of the given node.
*/
void iso_node_ref(IsoNode *node);
/**
* Decrements the reference couting of the given node.
* If it reach 0, the node is free, and, if the node is a directory,
* its children will be unref() too.
*/
void iso_node_unref(IsoNode *node);
/**
* Get the type of an IsoNode.
*/
enum IsoNodeType iso_node_get_type(IsoNode *node);
/**
* Set the name of a node. Note that if the node is already added to a dir
* this can fail if dir already contains a node with the new name.
*
* @param node
* The node whose name you want to change. Note that you can't change
* the name of the root.
* @param name
* The name for the node. If you supply an empty string or a
* name greater than 255 characters this returns with failure, and
* node name is not modified.
* @return
* 1 on success, < 0 on error
*/
int iso_node_set_name(IsoNode *node, const char *name);
/**
* Get the name of a node.
* The returned string belongs to the node and should not be modified nor
* freed. Use strdup if you really need your own copy.
*/
const char *iso_node_get_name(const IsoNode *node);
/**
* Set the permissions for the node. This attribute is only useful when
* Rock Ridge extensions are enabled.
*
* @param mode
* bitmask with the permissions of the node, as specified in 'man 2 stat'.
* The file type bitfields will be ignored, only file permissions will be
* modified.
*/
void iso_node_set_permissions(IsoNode *node, mode_t mode);
/**
* Get the permissions for the node
*/
mode_t iso_node_get_permissions(const IsoNode *node);
/**
* Get the mode of the node, both permissions and file type, as specified in
* 'man 2 stat'.
*/
mode_t iso_node_get_mode(const IsoNode *node);
/**
* Set the user id for the node. This attribute is only useful when
* Rock Ridge extensions are enabled.
*/
void iso_node_set_uid(IsoNode *node, uid_t uid);
/**
* Get the user id of the node.
*/
uid_t iso_node_get_uid(const IsoNode *node);
/**
* Set the group id for the node. This attribute is only useful when
* Rock Ridge extensions are enabled.
*/
void iso_node_set_gid(IsoNode *node, gid_t gid);
/**
* Get the group id of the node.
*/
gid_t iso_node_get_gid(const IsoNode *node);
/**
* Set the time of last modification of the file
*/
void iso_node_set_mtime(IsoNode *node, time_t time);
/**
* Get the time of last modification of the file
*/
time_t iso_node_get_mtime(const IsoNode *node);
/**
* Set the time of last access to the file
*/
void iso_node_set_atime(IsoNode *node, time_t time);
/**
* Get the time of last access to the file
*/
time_t iso_node_get_atime(const IsoNode *node);
/**
* Set the time of last status change of the file
*/
void iso_node_set_ctime(IsoNode *node, time_t time);
/**
* Get the time of last status change of the file
*/
time_t iso_node_get_ctime(const IsoNode *node);
/**
* Set if the node will be hidden in RR/ISO tree, Joliet tree or both.
*
* If the file is setted as hidden in one tree, it won't be included there, so
* it won't be visible in a OS accessing CD using that tree. For example,
* GNU/Linux systems access to Rock Ridge / ISO9960 tree in order to see
* what is recorded on CD, while MS Windows make use of the Joliet tree. If a
* file is hidden only in Joliet, it won't be visible in Windows systems,
* while still visible in Linux.
*
* If a file is hidden in both trees, it won't be written to image.
*
* @param node
* The node that is to be hidden.
* @param hide_attrs
* IsoHideNodeFlag's to set the trees in which file will be hidden.
*/
void iso_node_set_hidden(IsoNode *node, int hide_attrs);
/**
* Add a new node to a dir. Note that this function don't add a new ref to
* the node, so you don't need to free it, it will be automatically freed
* when the dir is deleted. Of course, if you want to keep using the node
* after the dir life, you need to iso_node_ref() it.
*
* @param dir
* the dir where to add the node
* @param child
* the node to add. You must ensure that the node hasn't previously added
* to other dir, and that the node name is unique inside the child.
* Otherwise this function will return a failure, and the child won't be
* inserted.
* @param replace
* if the dir already contains a node with the same name, whether to
* replace or not the old node with this.
* @return
* number of nodes in dir if succes, < 0 otherwise
* Possible errors:
* ISO_NULL_POINTER, if dir or child are NULL
* ISO_NODE_ALREADY_ADDED, if child is already added to other dir
* ISO_NODE_NAME_NOT_UNIQUE, a node with same name already exists
* ISO_WRONG_ARG_VALUE, if child == dir, or replace != (0,1)
*/
int iso_dir_add_node(IsoDir *dir, IsoNode *child,
enum iso_replace_mode replace);
/**
* Locate a node inside a given dir.
*
* @param name
* The name of the node
* @param node
* Location for a pointer to the node, it will filled with NULL if the dir
* doesn't have a child with the given name.
* The node will be owned by the dir and shouldn't be unref(). Just call
* iso_node_ref() to get your own reference to the node.
* Note that you can pass NULL is the only thing you want to do is check
* if a node with such name already exists on dir.
* @return
* 1 node found, 0 child has no such node, < 0 error
* Possible errors:
* ISO_NULL_POINTER, if dir or name are NULL
*/
int iso_dir_get_node(IsoDir *dir, const char *name, IsoNode **node);
/**
* Get the number of children of a directory.
*
* @return
* >= 0 number of items, < 0 error
* Possible errors:
* ISO_NULL_POINTER, if dir is NULL
*/
int iso_dir_get_nchildren(IsoDir *dir);
/**
* Removes a child from a directory.
* The child is not freed, so you will become the owner of the node. Later
* you can add the node to another dir (calling iso_dir_add_node), or free
* it if you don't need it (with iso_node_unref).
*
* @return
* 1 on success, < 0 error
* Possible errors:
* ISO_NULL_POINTER, if node is NULL
* ISO_NODE_NOT_ADDED_TO_DIR, if node doesn't belong to a dir
*/
int iso_node_take(IsoNode *node);
/**
* Removes a child from a directory and free (unref) it.
* If you want to keep the child alive, you need to iso_node_ref() it
* before this call, but in that case iso_node_take() is a better
* alternative.
*
* @return
* 1 on success, < 0 error
*/
int iso_node_remove(IsoNode *node);
/*
* Get the parent of the given iso tree node. No extra ref is added to the
* returned directory, you must take your ref. with iso_node_ref() if you
* need it.
*
* If node is the root node, the same node will be returned as its parent.
*
* This returns NULL if the node doesn't pertain to any tree
* (it was removed/take).
*/
IsoDir *iso_node_get_parent(IsoNode *node);
/**
* Get an iterator for the children of the given dir.
*
* You can iterate over the children with iso_dir_iter_next. When finished,
* you should free the iterator with iso_dir_iter_free.
* You musn't delete a child of the same dir, using iso_node_take() or
* iso_node_remove(), while you're using the iterator. You can use
* iso_node_take_iter() or iso_node_remove_iter() instead.
*
* You can use the iterator in the way like this
*
* IsoDirIter *iter;
* IsoNode *node;
* if ( iso_dir_get_children(dir, &iter) != 1 ) {
* // handle error
* }
* while ( iso_dir_iter_next(iter, &node) == 1 ) {
* // do something with the child
* }
* iso_dir_iter_free(iter);
*
* An iterator is intended to be used in a single iteration over the
* children of a dir. Thus, it should be treated as a temporary object,
* and free as soon as possible.
*
* @return
* 1 success, < 0 error
* Possible errors:
* ISO_NULL_POINTER, if dir or iter are NULL
* ISO_OUT_OF_MEM
*/
int iso_dir_get_children(const IsoDir *dir, IsoDirIter **iter);
/**
* Get the next child.
* Take care that the node is owned by its parent, and will be unref() when
* the parent is freed. If you want your own ref to it, call iso_node_ref()
* on it.
*
* @return
* 1 success, 0 if dir has no more elements, < 0 error
* Possible errors:
* ISO_NULL_POINTER, if node or iter are NULL
* ISO_ERROR, on wrong iter usage, usual caused by modiying the
* dir during iteration
*/
int iso_dir_iter_next(IsoDirIter *iter, IsoNode **node);
/**
* Check if there're more children.
*
* @return
* 1 dir has more elements, 0 no, < 0 error
* Possible errors:
* ISO_NULL_POINTER, if iter is NULL
*/
int iso_dir_iter_has_next(IsoDirIter *iter);
/**
* Free a dir iterator.
*/
void iso_dir_iter_free(IsoDirIter *iter);
/**
* Removes a child from a directory during an iteration, without freeing it.
* It's like iso_node_take(), but to be used during a directory iteration.
* The node removed will be the last returned by the iteration.
*
* The behavior on two call to this function without calling iso_dir_iter_next
* between then is undefined, and should never occur. (TODO protect against this?)
*
* @return
* 1 on succes, < 0 error
* Possible errors:
* ISO_NULL_POINTER, if iter is NULL
* ISO_ERROR, on wrong iter usage, for example by call this before
* iso_dir_iter_next.
*/
int iso_dir_iter_take(IsoDirIter *iter);
/**
* Removes a child from a directory during an iteration and unref() it.
* It's like iso_node_remove(), but to be used during a directory iteration.
* The node removed will be the last returned by the iteration.
*
* The behavior on two call to this function without calling iso_tree_iter_next
* between then is undefined, and should never occur. (TODO protect against this?)
*
* @return
* 1 on succes, < 0 error
* Possible errors:
* ISO_NULL_POINTER, if iter is NULL
* ISO_ERROR, on wrong iter usage, for example by call this before
* iso_dir_iter_next.
*/
int iso_dir_iter_remove(IsoDirIter *iter);
/**
* Get the destination of a node.
* The returned string belongs to the node and should not be modified nor
* freed. Use strdup if you really need your own copy.
*/
const char *iso_symlink_get_dest(const IsoSymlink *link);
/**
* Set the destination of a link.
*
* @param dest
* New destination for the link. It must be a non-empty string, otherwise
* this function doesn't modify previous destination.
* @return
* 1 on success, < 0 on error
*/
int iso_symlink_set_dest(IsoSymlink *link, const char *dest);
/**
* Sets the order in which a node will be written on image. High weihted files
* will be written first, so in a disc them will be written near the center.
*
* @param node
* The node which weight will be changed. If it's a dir, this function
* will change the weight of all its children. For nodes other that dirs
* or regular files, this function has no effect.
* @param w
* The weight as a integer number, the greater this value is, the
* closer from the begining of image the file will be written.
*/
void iso_node_set_sort_weight(IsoNode *node, int w);
/**
* Get the sort weight of a file.
*/
int iso_file_get_sort_weight(IsoFile *file);
/**
* Get the size of the file, in bytes
*/
off_t iso_file_get_size(IsoFile *file);
/**
* Add a new directory to the iso tree. Permissions, owner and hidden atts
* are taken from parent, you can modify them later.
*
* @param parent
* the dir where the new directory will be created
* @param name
* name for the new dir. If a node with same name already exists on
* parent, this functions fails with ISO_NODE_NAME_NOT_UNIQUE.
* @param dir
* place where to store a pointer to the newly created dir. No extra
* ref is addded, so you will need to call iso_node_ref() if you really
* need it. You can pass NULL in this parameter if you don't need the
* pointer.
* @return
* number of nodes in parent if success, < 0 otherwise
* Possible errors:
* ISO_NULL_POINTER, if parent or name are NULL
* ISO_NODE_NAME_NOT_UNIQUE, a node with same name already exists
* ISO_MEM_ERROR
*/
int iso_tree_add_new_dir(IsoDir *parent, const char *name, IsoDir **dir);
/*
TODO #00007 expose Strem and thi function:
int iso_tree_add_new_file(IsoDir *parent, const char *name, stream, file)
*/
/**
* Add a new symlink to the directory tree. Permissions are set to 0777,
* owner and hidden atts are taken from parent. You can modify any of them
* later.
*
* @param parent
* the dir where the new symlink will be created
* @param name
* name for the new symlink. If a node with same name already exists on
* parent, this functions fails with ISO_NODE_NAME_NOT_UNIQUE.
* @param dest
* destination of the link
* @param link
* place where to store a pointer to the newly created link. No extra
* ref is addded, so you will need to call iso_node_ref() if you really
* need it. You can pass NULL in this parameter if you don't need the
* pointer
* @return
* number of nodes in parent if success, < 0 otherwise
* Possible errors:
* ISO_NULL_POINTER, if parent, name or dest are NULL
* ISO_NODE_NAME_NOT_UNIQUE, a node with same name already exists
* ISO_MEM_ERROR
*/
int iso_tree_add_new_symlink(IsoDir *parent, const char *name,
const char *dest, IsoSymlink **link);
/**
* Add a new special file to the directory tree. As far as libisofs concerns,
* an special file is a block device, a character device, a FIFO (named pipe)
* or a socket. You can choose the specific kind of file you want to add
* by setting mode propertly (see man 2 stat).
*
* Note that special files are only written to image when Rock Ridge
* extensions are enabled. Moreover, a special file is just a directory entry
* in the image tree, no data is written beyond that.
*
* Owner and hidden atts are taken from parent. You can modify any of them
* later.
*
* @param parent
* the dir where the new special file will be created
* @param name
* name for the new special file. If a node with same name already exists
* on parent, this functions fails with ISO_NODE_NAME_NOT_UNIQUE.
* @param mode
* file type and permissions for the new node. Note that you can't
* specify any kind of file here, only special types are allowed. i.e,
* S_IFSOCK, S_IFBLK, S_IFCHR and S_IFIFO are valid types; S_IFLNK,
* S_IFREG and S_IFDIR aren't.
* @param dev
* device ID, equivalent to the st_rdev field in man 2 stat.
* @param special
* place where to store a pointer to the newly created special file. No
* extra ref is addded, so you will need to call iso_node_ref() if you
* really need it. You can pass NULL in this parameter if you don't need
* the pointer.
* @return
* number of nodes in parent if success, < 0 otherwise
* Possible errors:
* ISO_NULL_POINTER, if parent, name or dest are NULL
* ISO_NODE_NAME_NOT_UNIQUE, a node with same name already exists
* ISO_WRONG_ARG_VALUE if you select a incorrect mode
* ISO_MEM_ERROR
*/
int iso_tree_add_new_special(IsoDir *parent, const char *name, mode_t mode,
dev_t dev, IsoSpecial **special);
/**
* Set whether to follow or not symbolic links when added a file from a source
* to IsoImage. Default behavior is to not follow symlinks.
*/
void iso_tree_set_follow_symlinks(IsoImage *image, int follow);
/**
* Get current setting for follow_symlinks.
*
* @see iso_tree_set_follow_symlinks
*/
int iso_tree_get_follow_symlinks(IsoImage *image);
/**
* Set whether to skip or not hidden files when adding a directory recursibely.
* Default behavior is to not ignore them, i.e., to add hidden files to image.
*/
void iso_tree_set_ignore_hidden(IsoImage *image, int skip);
/**
* Get current setting for ignore_hidden.
*
* @see iso_tree_set_ignore_hidden
*/
int iso_tree_get_ignore_hidden(IsoImage *image);
/**
* Set whether to stop or not when an error happens when adding recursively a
* directory to the iso tree. Default value is to skip file and continue.
*/
void iso_tree_set_stop_on_error(IsoImage *image, int stop);
/**
* Get current setting for stop_on_error.
*
* @see iso_tree_set_stop_on_error
*/
int iso_tree_get_stop_on_error(IsoImage *image);
/**
* Add a new node to the image tree, from an existing file.
*
* TODO comment Builder and Filesystem related issues when exposing both
*
* All attributes will be taken from the source file. The appropriate file
* type will be created.
*
* @param image
* The image
* @param parent
* The directory in the image tree where the node will be added.
* @param path
* The path of the file to add in the filesystem.
* @param node
* place where to store a pointer to the newly added file. No
* extra ref is addded, so you will need to call iso_node_ref() if you
* really need it. You can pass NULL in this parameter if you don't need
* the pointer.
* @return
* number of nodes in parent if success, < 0 otherwise
* Possible errors:
* ISO_NULL_POINTER, if image, parent or path are NULL
* ISO_NODE_NAME_NOT_UNIQUE, a node with same name already exists
* ISO_MEM_ERROR
*/
int iso_tree_add_node(IsoImage *image, IsoDir *parent, const char *path,
IsoNode **node);
/**
* Add the contents of a dir to a given directory of the iso tree.
*
* TODO comment Builder and Filesystem related issues when exposing both
*
* @param image
* TODO expose dir rec options and explain that here
* @param parent
* Directory on the image tree where to add the contents of the dir
* @param dir
* Path to a dir in the filesystem
* @return
* number of nodes in parent if success, < 0 otherwise
*/
int iso_tree_add_dir_rec(IsoImage *image, IsoDir *parent, const char *dir);
/**
* Locate a node by its path on image.
*
* @param node
* Location for a pointer to the node, it will filled with NULL if the
* given path does not exists on image.
* The node will be owned by the image and shouldn't be unref(). Just call
* iso_node_ref() to get your own reference to the node.
* Note that you can pass NULL is the only thing you want to do is check
* if a node with such path really exists.
* @return
* 1 found, 0 not found, < 0 error
*/
int iso_tree_path_to_node(IsoImage *image, const char *path, IsoNode **node);
/**
* Increments the reference counting of the given IsoDataSource.
*/
void iso_data_source_ref(IsoDataSource *src);
/**
* Decrements the reference counting of the given IsoDataSource, freeing it
* if refcount reach 0.
*/
void iso_data_source_unref(IsoDataSource *src);
/**
* Create a new IsoDataSource from a local file. This is suitable for
* accessing regular .iso images, or to acces drives via its block device
* and standard POSIX I/O calls.
*
* @param path
* The path of the file
* @param src
* Will be filled with the pointer to the newly created data source.
* @return
* 1 on success, < 0 on error.
*/
int iso_data_source_new_from_file(const char *path, IsoDataSource **src);
/**
* Get the status of the buffer used by a burn_source.
*
* @param b
* A burn_source previously obtained with
* iso_image_create_burn_source().
* @param size
* Will be filled with the total size of the buffer, in bytes
* @param free_bytes
* Will be filled with the bytes currently available in buffer
* @return
* < 0 error, > 0 state:
* 1="active" : input and consumption are active
* 2="ending" : input has ended without error
* 3="failing" : input had error and ended,
* 5="abandoned" : consumption has ended prematurely
* 6="ended" : consumption has ended without input error
* 7="aborted" : consumption has ended after input error
*/
int iso_ring_buffer_get_status(struct burn_source *b, size_t *size,
size_t *free_bytes);
#define ISO_MSGS_MESSAGE_LEN 4096
/**
* Control queueing and stderr printing of messages from a given IsoImage.
* Severity may be one of "NEVER", "FATAL", "SORRY", "WARNING", "HINT",
* "NOTE", "UPDATE", "DEBUG", "ALL".
*
* @param image The image
* @param queue_severity Gives the minimum limit for messages to be queued.
* Default: "NEVER". If you queue messages then you
* must consume them by iso_msgs_obtain().
* @param print_severity Does the same for messages to be printed directly
* to stderr.
* @param print_id A text prefix to be printed before the message.
* @return >0 for success, <=0 for error
*/
int iso_image_set_msgs_severities(IsoImage *img, char *queue_severity,
char *print_severity, char *print_id);
/**
* Obtain the oldest pending message from a IsoImage message queue which has at
* least the given minimum_severity. This message and any older message of
* lower severity will get discarded from the queue and is then lost forever.
*
* Severity may be one of "NEVER", "FATAL", "SORRY", "WARNING", "HINT",
* "NOTE", "UPDATE", "DEBUG", "ALL". To call with minimum_severity "NEVER"
* will discard the whole queue.
*
* @param image The image whose messages we want to obtain
* @param error_code Will become a unique error code as listed in messages.h
* @param msg_text Must provide at least ISO_MSGS_MESSAGE_LEN bytes.
* @param os_errno Will become the eventual errno related to the message
* @param severity Will become the severity related to the message and
* should provide at least 80 bytes.
* @return 1 if a matching item was found, 0 if not, <0 for severe errors
*/
int iso_image_obtain_msgs(IsoImage *image, char *minimum_severity,
int *error_code, char msg_text[], int *os_errno,
char severity[]);
/**
* Return the messenger object handle used by the given image. This handle
* may be used by related libraries to their own compatible
* messenger objects and thus to direct their messages to the libisofs
* message queue. See also: libburn, API function burn_set_messenger().
*
* @return the handle. Do only use with compatible
*/
void *iso_image_get_messenger(IsoImage *image);
#endif /*LIBISO_LIBISOFS_H_*/