777 lines
27 KiB
C
777 lines
27 KiB
C
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/*
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Class struct of libisoburn.
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Copyright 2007 - 2012 Vreixo Formoso Lopes <metalpain2002@yahoo.es>
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and Thomas Schmitt <scdbackup@gmx.net>
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Provided under GPL version 2 or later.
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*/
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#ifndef Isoburn_includeD
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#define Isoburn_includeD
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/* for uint8_t */
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#ifdef HAVE_STDINT_H
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#include <stdint.h>
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#else
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#ifdef HAVE_INTTYPES_H
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#include <inttypes.h>
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#endif
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#endif
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/* For emulated TOC of overwriteable media.
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Provides minimal info for faking a struct burn_toc_entry.
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*/
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struct isoburn_toc_entry {
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int session;
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int track_no; /* point */
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int start_lba;
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int track_blocks;
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char *volid; /* For caching a volume id from emulated toc on overwriteables */
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struct isoburn_toc_entry *next;
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};
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int isoburn_toc_entry_new(struct isoburn_toc_entry **objpt,
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struct isoburn_toc_entry *boss, int flag);
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/* @param flag bit0= delete all subordinates too
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*/
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int isoburn_toc_entry_destroy(struct isoburn_toc_entry **o, int flag);
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/* Minimal size of target_iso_head which is to be written during
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isoburn_activate_session().
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Within this size there is everything that is needed for image access with
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no partition offset. The actual target_iso_head buffer must be larger by
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the evential partition offset.
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*/
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#define Libisoburn_target_head_sizE (32*2048)
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/* Maximum number of appended partitions. Effectively usable number depends
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on system area type.
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*/
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#define Libisoburn_max_appended_partitionS 8
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/*
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Maximum length of a disc label text plus 1.
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*/
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#define Libisoburn_disc_label_sizE 129
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struct isoburn {
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/* The libburn drive to which this isoburn object is related
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Most isoburn calls will use a burn_drive as object handle */
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struct burn_drive *drive;
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/* -1= inappropriate medium state detected
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0= libburn multi-session medium, resp. undecided yet
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1= random access medium */
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int emulation_mode;
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/* Although rarely used, libburn can operate on several
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drives simultaneously. */
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struct isoburn *prev;
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struct isoburn *next;
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/* If >= 0, this address is used as reply for isoburn_disc_get_msc1()
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*/
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int fabricated_msc1;
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/* If >= 0, this address is used in isoburn_disc_track_lba_nwa()
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as reply parameter nwa.
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(The other nwa parameters below apply only to the effective write address
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on random access media. msc2 is handed to libisofs but not to libburn.)
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*/
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int fabricated_msc2;
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/* The nwa to be used for a first session on the present kind of overwriteable
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media (usually Libisoburn_overwriteable_starT, but might be forced to 0)
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*/
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int zero_nwa;
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/* Start address as given by image examination (bytes, not blocks) */
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off_t min_start_byte;
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/* Aligned start address to be used for processing (counted in blocks) */
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int nwa;
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/* Truncate to .nwa an eventual regular file serving as output drive */
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int truncate;
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/* Eventual freely fabricated isoburn_disc_get_status().
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BURN_DISC_UNREADY means that this variable is disabled
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and normally emulated status is in effect.
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*/
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enum burn_disc_status fabricated_disc_status;
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/* To be set if read errors occured during media evaluation.
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*/
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int media_read_error;
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/* Eventual emulated table of content read from the chain of ISO headers
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on overwriteable media.
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*/
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struct isoburn_toc_entry *toc;
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/* Indicator wether the most recent burn run worked :
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-1 = undetermined, ask libburn , 0 = failure , 1 = success
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To be inquired by isoburn_drive_wrote_well()
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*/
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int wrote_well;
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/* ISO head buffer to be filled by write run */
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int target_iso_head_size;
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uint8_t *target_iso_head;
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/* The 2k offset which was read from a loaded image.
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*/
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uint32_t loaded_partition_offset;
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/* Libisofs image context */
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IsoImage *image;
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/* The start LBA of the image */
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int image_start_lba;
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/* The block data source from which the existing image is read.
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*/
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IsoDataSource *iso_data_source;
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/* The burn source which transfers data from libisofs to libburn.
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It has its own fifo.
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*/
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struct burn_source *iso_source;
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/* For iso_tree_set_report_callback() */
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int (*read_pacifier)(IsoImage*, IsoFileSource*);
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/* For iso_image_attach_data() */
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void *read_pacifier_handle;
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/* An application provided method to immediately deliver messages */
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int (*msgs_submit)(void *handle, int error_code, char msg_text[],
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int os_errno, char severity[], int flag);
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void *msgs_submit_handle; /* specific to application method */
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int msgs_submit_flag; /* specific to application method */
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/* Forwarding an image generation option to the burn wrapper */
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int do_tao;
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};
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/* Creation and disposal function */
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int isoburn_new(struct isoburn **objpt, int flag);
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int isoburn_destroy(struct isoburn **objpt, int flag);
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/* Eventual readers for public attributes */
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/* ( put into separate .h file then ) */
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int isoburn_get_emulation_mode(struct isoburn *o, int *pt, int flag);
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int isoburn_get_target_volset(struct isoburn *o, IsoImage **pt, int flag);
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/* List management */
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int isoburn_get_prev(struct isoburn *o, struct isoburn **pt, int flag);
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int isoburn_get_next(struct isoburn *o, struct isoburn **pt, int flag);
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int isoburn_destroy_all(struct isoburn **objpt, int flag);
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int isoburn_link(struct isoburn *o, struct isoburn *link, int flag);
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int isoburn_count(struct isoburn *o, int flag);
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int isoburn_by_idx(struct isoburn *o, int idx, struct isoburn **pt, int flag);
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int isoburn_find_by_drive(struct isoburn **pt, struct burn_drive *d, int flag);
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/* Non API inner interfaces */
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/* Submit a libisofs error to the libburn messenger. An application message
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reader shall recognize the error code range and attribute it to the
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libisofs message channel to which one cannot submit via API.
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@param iso_error_code return value <= 0 from a libisofs API call.
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@param default_msg_text is to be put out if iso_error_code leads to no
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error message
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@param os_errno operating system errno, submit 0 if none is known
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@param min_severity minimum severity, might be be increased if libisofs
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error severity surpasses min_severity.
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@param flag Bitfield, submit 0 for now
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*/
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int isoburn_report_iso_error(int iso_error_code, char default_msg_text[],
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int os_errno, char min_severity[], int flag);
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/* Calls from burn_wrap.c into isofs_wrap.c */
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int isoburn_start_emulation(struct isoburn *o, int flag);
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int isoburn_invalidate_iso(struct isoburn *o, int flag);
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/* Calls from isofs_wrap.c into burn_wrap.c */
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/** Get an eventual isoburn object which is wrapped around the drive.
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@param pt Eventually returns a pointer to the found object.
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It is allowed to become NULL if return value is -1 or 0.
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In this case, the drive is a genuine libburn drive
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with no emulation activated by isoburn.
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@param drive The drive to be searched for
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@param flag unused yet
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@return -1 unsuitable medium, 0 generic medium, 1 emulated medium.
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*/
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int isoburn_find_emulator(struct isoburn **pt,
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struct burn_drive *drive, int flag);
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/* Deliver an event message. Either via a non-NULL o->msgs_submit() method
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or via burn_msgs_submit() of libburn.
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*/
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int isoburn_msgs_submit(struct isoburn *o, int error_code, char msg_text[],
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int os_errno, char severity[], int flag);
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/** Set the start address for an emulated add-on session. The value will
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be rounded up to the alignment necessary for the medium. The aligned
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value will be divided by 2048 and then put into o->nwa .
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@param o The isoburn object to be programmed.
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@param value The start address in bytes
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@param flag unused yet
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@return <=0 is failure , >0 success
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*/
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int isoburn_set_start_byte(struct isoburn *o, off_t value, int flag);
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/** Obtains the image address offset to be used with image generation.
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This is either the (emulated) drive nwa or a value set by
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isoburn_prepare_blind_grow().
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In any case this is the address to tell to iso_write_opts_set_ms_block().
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@param o The isoburn object to be inquired
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@param opts If not NULL: write parameters to be set on drive before query
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@param msc2 The value to be used with iso_write_opts_set_ms_block()
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@param flag unused yet
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@return <=0 is failure , >0 success
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*/
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int isoburn_get_msc2(struct isoburn *o,
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struct burn_write_opts *opts, int *msc2, int flag);
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/** Get a data source suitable for read from a drive using burn_read_data()
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function.
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@param d drive to read from. Must be grabbed.
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@param displacement will be added or subtracted to any block address
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@param displacement_sign +1 = add , -1= subtract , else keep unaltered
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@return the data source, NULL on error. Must be freed with libisofs
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iso_data_source_unref() function. Note: this doesn't release
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the drive.
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*/
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IsoDataSource *
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isoburn_data_source_new(struct burn_drive *d,
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uint32_t displacement, int displacement_sign,
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int cache_tiles, int tile_blocks);
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/** Default settings for above cache_tiles, tile_blocks in newly created
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struct isoburn_read_opts.
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*/
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#define Libisoburn_default_cache_tileS 32
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#define Libisoburn_default_tile_blockS 32
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/** Maximum size of the cache in 2 kB blocks (1 GB)
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*/
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#define Libisoburn_cache_max_sizE (1024 * 512)
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/** Disable read capabilities of a data source which was originally created
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by isoburn_data_source_new(). After this any attempt to read will yield
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a FATAL programming error event.
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This is usually done to allow libburn to release the drive while libisofs
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still holds a reference to the data source object. libisofs is not supposed
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to use this object for reading any more, nevertheless. The disabled state
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of the data source is a safety fence around this daring situation.
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@param src The data source to be disabled
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@param flag unused yet
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@return <=0 is failure , >0 success
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*/
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int isoburn_data_source_shutdown(IsoDataSource *src, int flag);
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/** Check whether the size of target_iso_head matches the given partition
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offset. Eventually adjust size.
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*/
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int isoburn_adjust_target_iso_head(struct isoburn *o,
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uint32_t offst, int flag);
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/** Initialize the root directory attributes of a freshly created image.
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*/
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int isoburn_root_defaults(IsoImage *image, int flag);
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/**
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* Options for image reading.
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(Comments here may be outdated. API getter/setter function descriptions
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may override the descriptions here. Any difference is supposed to be a
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minor correction only.)
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*/
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struct isoburn_read_opts {
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int cache_tiles; /* number of cache tiles */
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int cache_tile_blocks;
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unsigned int norock:1; /*< Do not read Rock Ridge extensions */
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unsigned int nojoliet:1; /*< Do not read Joliet extensions */
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unsigned int noiso1999:1; /*< Do not read ISO 9660:1999 enhanced tree */
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/* ts A90121 */
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unsigned int noaaip:1; /* Do not read AAIP for ACL and EA */
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unsigned int noacl:1; /* Do not read ACL from external file objects */
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unsigned int noea:1; /* Do not read XFS-style EA from externals */
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/* ts A90508 */
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unsigned int noino:1; /* Discard eventual PX inode numbers */
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/* ts A90810 */
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unsigned int nomd5:2; /* Do not read eventual MD5 array */
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unsigned int preferjoliet:1;
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/*< When both Joliet and RR extensions are present, the RR
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* tree is used. If you prefer using Joliet, set this to 1. */
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uid_t uid; /**< Default uid when no RR */
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gid_t gid; /**< Default uid when no RR */
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mode_t mode; /**< Default mode when no RR (only permissions) */
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mode_t dirmode; /**< Default mode for directories
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when no RR (only permissions) */
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/**
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* Input charset for RR file names. NULL to use default locale charset.
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*/
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char *input_charset;
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/**
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* Enable or disable methods to automatically choose an input charset.
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* This eventually overrides input_charset.
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*
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* bit0= allow to set the input character set automatically from
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* attribute "isofs.cs" of root directory
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*/
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int auto_input_charset;
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/* modified by the function isoburn_read_image */
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unsigned int hasRR:1; /*< It will be set to 1 if RR extensions are present,
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to 0 if not. */
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unsigned int hasJoliet:1; /*< It will be set to 1 if Joliet extensions are
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present, to 0 if not. */
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/**
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* It will be set to 1 if the image is an ISO 9660:1999, i.e. it has
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* a version 2 Enhanced Volume Descriptor.
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*/
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unsigned int hasIso1999:1;
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/** It will be set to 1 if El-Torito boot record is present, to 0 if not.*/
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unsigned int hasElTorito:1;
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uint32_t size; /**< Will be filled with the size (in 2048 byte block) of
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* the image, as reported in the PVM. */
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unsigned int pretend_blank:1; /* always create empty image */
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uint32_t displacement;
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int displacement_sign;
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};
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/**
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* Options for image generation by libisofs and image transport to libburn.
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(Comments here may be outdated. API getter/setter function descriptions
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may override the descriptions here. Any difference is supposed to be a
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minor correction only.)
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*/
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struct isoburn_imgen_opts {
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/* Options for image generation */
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int will_cancel :1;
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int level; /**< ISO level to write at. */
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/** Which extensions to support. */
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unsigned int rockridge :1;
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unsigned int joliet :1;
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unsigned int iso1999 :1;
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unsigned int hfsplus :1;
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unsigned int fat :1;
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/* Whether to mark suitable IsoNode as hardlinks in RRIP PX */
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unsigned int hardlinks :1;
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/* Write eventual AAIP info containing ACL and EA */
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unsigned int aaip :1;
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/* Produce and write a MD5 checksum of the whole session stream. */
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unsigned int session_md5 :1;
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/* Produce and write MD5 checksums for each single IsoFile.
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See parameter "files" of iso_write_opts_set_record_md5().
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*/
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unsigned int file_md5 :2;
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/* On overwriteable media or random access files do not write the first
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session to LBA 32, but rather to LBA 0 directly.
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*/
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unsigned int no_emul_toc :1;
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/* For empty files, symbolic links, and devices use the old ECMA-119 block
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addresses in the range [0,31] rather than the address of the dedicated
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empty block.
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*/
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unsigned int old_empty :1;
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/* relaxed constraints */
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/*
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* Relaxed constraints. Setting any of these to 1 break the specifications,
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* but it is supposed to work on most moderns systems. Use with caution.
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*/
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/*
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* Extra Caution: This option breaks any assumptions about names that
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* are supported by ECMA-119 specifications.
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* Omit any translation which would make a file name compliant to the
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* ECMA-119 rules. This includes and exceeds omit_version_numbers,
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* max_37_char_filenames, no_force_dots bit0, allow_lowercase.
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*/
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unsigned int untranslated_name_len;
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/*
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* Convert directory names for ECMA-119 similar to other file names, but do
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* not force a dot or add a version number.
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* This violates ECMA-119 by allowing one "." and especially ISO level 1
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* by allowing DOS style 8.3 names rather than only 8 characters.
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* (mkisofs and its clones seem to do this violation.)
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*/
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unsigned int allow_dir_id_ext :1;
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/**
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* Omit the version number (";1") at the end of the ISO-9660 identifiers.
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* Version numbers are usually not used.
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* bit0= omit version number with ECMA-119 and Joliet
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* bit1= omit version number with Joliet alone
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*/
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unsigned int omit_version_numbers :2;
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/**
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* Allow ISO-9660 directory hierarchy to be deeper than 8 levels.
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*/
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unsigned int allow_deep_paths :1;
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/**
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* If not allow_deep_paths is in effect, then it may become
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* necessary to relocate directories so that no ECMA-119 file path
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* has more than 8 components. These directories are grafted into either
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* the root directory of the ISO image or into a dedicated relocation
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* directory. For details see libisofs.h, iso_write_opts_set_rr_reloc().
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*/
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char *rr_reloc_dir; /* IsoNode name in root directory. NULL or
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empty text means root itself. */
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int rr_reloc_flags; /* bit0= mark auto-created rr_reloc_dir by RE
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bit1= not settable via API (used internally)
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*/
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/**
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* Allow path in the ISO-9660 tree to have more than 255 characters.
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*/
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unsigned int allow_longer_paths :1;
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/**
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* Allow a single file or directory hierarchy to have up to 37 characters.
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* This is larger than the 31 characters allowed by ISO level 2, and the
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* extra space is taken from the version number, so this also forces
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* omit_version_numbers.
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*/
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unsigned int max_37_char_filenames :1;
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/**
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* ISO-9660 forces filenames to have a ".", that separates file name from
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* extension. libisofs adds it if original filename doesn't has one. Set
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* this to 1 to prevent this behavior
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* bit0= no forced dot with ECMA-119
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* bit1= no forced dot with Joliet
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*/
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unsigned int no_force_dots :2;
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/**
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* Allow lowercase characters in ISO-9660 filenames. By default, only
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* uppercase characters, numbers and a few other characters are allowed.
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*/
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unsigned int allow_lowercase :1;
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/**
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* Allow all ASCII characters to be appear on an ISO-9660 filename. Note
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* that "/" and "\0" characters are never allowed, even in RR names.
|
|
*/
|
|
unsigned int allow_full_ascii :1;
|
|
|
|
/**
|
|
* Like allow_full_ascii, but only allowing 7-bit characters.
|
|
* Lowercase letters get mapped to uppercase if not allow_lowercase is set.
|
|
* Gets overridden if allow_full_ascii is enabled.
|
|
*/
|
|
unsigned int allow_7bit_ascii :1;
|
|
|
|
/**
|
|
* Allow paths in the Joliet tree to have more than 240 characters.
|
|
*/
|
|
unsigned int joliet_longer_paths :1;
|
|
|
|
/**
|
|
* Allow leaf names in the Joliet tree to have up to 103 characters
|
|
* rather than 64.
|
|
*/
|
|
unsigned int joliet_long_names :1;
|
|
|
|
/**
|
|
* Store timestamps as GMT rather than in local time.
|
|
*/
|
|
unsigned int always_gmt :1;
|
|
|
|
/**
|
|
* Write Rock Ridge info as of specification RRIP-1.10 rather than
|
|
* RRIP-1.12: signature "RRIP_1991A" rather than "IEEE_1282",
|
|
* field PX without file serial number
|
|
*/
|
|
unsigned int rrip_version_1_10 :1;
|
|
|
|
/**
|
|
* Store as ECMA-119 Directory Record timestamp the mtime
|
|
* of the source rather than the image creation time.
|
|
* The same can be ordered for Joliet and ISO 9660:1999
|
|
*/
|
|
unsigned int dir_rec_mtime :1;
|
|
unsigned int joliet_rec_mtime :1;
|
|
unsigned int iso1999_rec_mtime :1;
|
|
|
|
/**
|
|
* Write AAIP as extension according to SUSP 1.10 rather than SUSP 1.12.
|
|
* I.e. without announcing it by an ER field and thus without the need
|
|
* to preceed the RRIP fields by an ES and to preceed the AA field by ES.
|
|
*/
|
|
unsigned int aaip_susp_1_10 :1;
|
|
|
|
unsigned int sort_files:1;
|
|
/**< If files should be sorted based on their weight. */
|
|
|
|
/**
|
|
* 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 set 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. */
|
|
|
|
char *output_charset; /**< NULL to use default charset */
|
|
|
|
|
|
/* Options for image transport */
|
|
|
|
/** The number of bytes to be used for the fifo which decouples libisofs
|
|
and libburn for better throughput and for reducing the risk of
|
|
interrupting signals hitting the libburn thread which operates the
|
|
MMC drive.
|
|
The size will be rounded up to the next full 2048.
|
|
Minimum is 64kiB, maximum is 1 GiB (but that is too much anyway).
|
|
*/
|
|
int fifo_size;
|
|
|
|
|
|
/** Output value: Block address of session start as evaluated from medium
|
|
and other options by libisoburn and libburn.
|
|
If <0 : Invalid
|
|
If >=0: Valid block number. Block size is always 2 KiB.
|
|
*/
|
|
int effective_lba;
|
|
|
|
/** Output value: Block address of data section start as predicted by
|
|
libisofs.
|
|
If < 16: Invalid
|
|
If >=16: Valid block number. Block size is always 2 KiB.
|
|
*/
|
|
int data_start_lba;
|
|
|
|
/**
|
|
* If not empty: Parameters "name" and "timestamp" for a scdbackup stream
|
|
* checksum tag. See scdbackup/README appendix VERIFY.
|
|
* It makes sense only for single session images which start at LBA 0.
|
|
* Such a tag may be part of a libisofs checksum tag block after the
|
|
* session tag line. It then covers the whole session up to its own start
|
|
* position.
|
|
* If scdbackup_tag_written is not NULL then it is a pointer to an
|
|
* application provided array with at least 512 characters. The effectively
|
|
* written scdbackup tag will be copied to this memory location.
|
|
*/
|
|
char scdbackup_tag_name[81];
|
|
char scdbackup_tag_time[19];
|
|
char *scdbackup_tag_written;
|
|
|
|
|
|
/* Content of an embedded boot image. Valid if not NULL.
|
|
* In that case it must point to a memory buffer at least 32 kB.
|
|
*/
|
|
char *system_area_data;
|
|
/*
|
|
* bit0= make bytes 446 - 512 of the system area a partition
|
|
* table which reserves partition 1 from byte 63*512 to the
|
|
* end of the ISO image. Assumed are 63 secs/hed, 255 head/cyl.
|
|
* (GRUB protective msdos label.)
|
|
* This works with and without system_area_data.
|
|
*/
|
|
int system_area_options;
|
|
|
|
/* User settable PVD time stamps */
|
|
time_t vol_creation_time;
|
|
time_t vol_modification_time;
|
|
time_t vol_expiration_time;
|
|
time_t vol_effective_time;
|
|
/* To eventually override vol_modification_time by unconverted string
|
|
and timezone 0 */
|
|
char vol_uuid[17];
|
|
|
|
/* The number of unclaimed 2K blocks before start of partition 1 as of
|
|
the MBR in system area. If not 0 this will cause double volume
|
|
descriptor sets and double tree.
|
|
*/
|
|
uint32_t partition_offset;
|
|
/* Partition table parameter: 1 to 63, 0= disabled/default */
|
|
int partition_secs_per_head;
|
|
/* 1 to 255, 0= disabled/default */
|
|
int partition_heads_per_cyl;
|
|
|
|
/* Parameters and state of Jigdo Template Export environment.
|
|
*/
|
|
void *libjte_handle;
|
|
|
|
/* A trailing padding of zero bytes which belongs to the image
|
|
*/
|
|
uint32_t tail_blocks;
|
|
|
|
/* Disk file paths of content of PreP partition and EFI system partition */
|
|
char *prep_partition;
|
|
char *efi_boot_partition;
|
|
|
|
/* Eventual disk file paths of prepared images which shall be appended
|
|
after the ISO image and described by partiton table entries in a MBR.
|
|
*/
|
|
char *appended_partitions[Libisoburn_max_appended_partitionS];
|
|
uint8_t appended_part_types[Libisoburn_max_appended_partitionS];
|
|
|
|
/* Eventual name of the non-ISO aspect of the image. E.g. SUN ASCII label.
|
|
*/
|
|
char ascii_disc_label[Libisoburn_disc_label_sizE];
|
|
|
|
/* HFS+ image serial number.
|
|
* 00...00 means that it shall be generated by libisofs.
|
|
*/
|
|
uint8_t hfsp_serial_number[8];
|
|
|
|
/* Allocation block size of HFS+ : 0= auto , 512, or 2048
|
|
*/
|
|
int hfsp_block_size;
|
|
|
|
/* Block size of and in APM : 0= auto , 512, or 2048
|
|
*/
|
|
int apm_block_size;
|
|
|
|
/* Write mode for optical media:
|
|
* 0 = auto
|
|
* 1 = TAO, Incremental, no RESERVE TRACK
|
|
* -1 = SAO, DAO, RESERVE TRACK
|
|
*/
|
|
int do_tao;
|
|
|
|
};
|
|
|
|
|
|
/* Alignment for session starts on overwriteable media.
|
|
(Increased from 16 to 32 blocks for aligning to BD-RE clusters.)
|
|
*/
|
|
#define Libisoburn_nwa_alignemenT 32
|
|
|
|
|
|
/* Alignment for outer session scanning with -ROM drives.
|
|
(E.g. my DVD-ROM drive shows any DVD type as 0x10 "DVD-ROM" with
|
|
more or less false capacity and TOC.)
|
|
*/
|
|
#define Libisoburn_toc_scan_alignemenT 16
|
|
|
|
/* Maximum gap to be bridged during a outer TOC scan. Gaps appear between the
|
|
end of a session and the start of the next session.
|
|
The longest gap found so far was about 38100 after the first session of a
|
|
DVD-R.
|
|
*/
|
|
#define Libisoburn_toc_scan_max_gaP 65536
|
|
|
|
|
|
/* Creating a chain of image headers which form a TOC:
|
|
|
|
The header of the first session is written after the LBA 0 header.
|
|
So it persists and can give the end of its session. By help of
|
|
Libisoburn_nwa_alignemenT it should be possible to predict the start
|
|
of the next session header.
|
|
The LBA 0 header is written by isoburn_activate_session() already
|
|
with the first session. So the medium is mountable.
|
|
A problem arises with DVD-RW in Intermediate State. They cannot be
|
|
written by random access before they were written sequentially.
|
|
In this case, no copy of the session 1 header is maintained and no TOC
|
|
will be possible. Thus writing begins sequentially at LBA 0.
|
|
|
|
IMPORTANT: This macro gives the minimal size of an image header.
|
|
It has to be enlarged by the eventual partition offset.
|
|
*/
|
|
#define Libisoburn_overwriteable_starT \
|
|
((off_t) (Libisoburn_target_head_sizE/2048))
|
|
|
|
|
|
/* Wrappers for emulation of TOC on overwriteable media */
|
|
|
|
struct isoburn_toc_track {
|
|
/* Either track or toc_entry are supposed to be NULL */
|
|
struct burn_track *track;
|
|
struct isoburn_toc_entry *toc_entry;
|
|
};
|
|
|
|
struct isoburn_toc_session {
|
|
/* Either session or tracks and toc_entry are supposed to be NULL */
|
|
struct burn_session *session;
|
|
struct isoburn_toc_track **track_pointers;
|
|
int track_count;
|
|
struct isoburn_toc_entry *toc_entry;
|
|
};
|
|
|
|
struct isoburn_toc_disc {
|
|
/* Either disc or sessions and toc are supposed to be NULL */
|
|
struct burn_disc *disc;
|
|
struct isoburn_toc_session *sessions; /* storage array */
|
|
struct isoburn_toc_session **session_pointers; /* storage array */
|
|
struct isoburn_toc_track *tracks; /* storage array */
|
|
struct isoburn_toc_track **track_pointers; /* storage array */
|
|
int session_count;
|
|
int incomplete_session_count;
|
|
int track_count;
|
|
struct isoburn_toc_entry *toc;
|
|
};
|
|
|
|
#endif /* Isoburn_includeD */
|
|
|