475 lines
17 KiB
C
475 lines
17 KiB
C
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/*
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Class struct of libisoburn.
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Copyright 2007 Vreixo Formoso Lopes <metalpain2002@yahoo.es>
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and Thomas Schmitt <scdbackup@gmx.net>
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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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#include <stdint.h>
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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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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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/* Size of target_iso_head which is to be written during
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isoburn_activate_session()
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*/
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#define Libisoburn_target_head_sizE (32*2048)
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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 media state detected
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0= libburn multi-session media, resp. undecided yet
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1= random access media */
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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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/* 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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/* Buffered ISO head from media (should that become part of
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ecma119_read_opts ?) */
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uint8_t target_iso_head[Libisoburn_target_head_sizE];
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/* Libisofs image context */
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IsoImage *image;
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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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};
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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 media, 0 generic media, 1 emulated media.
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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 media. 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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@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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/** 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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/**
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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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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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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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/* 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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};
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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 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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/* 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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* 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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*/
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unsigned int omit_version_numbers :1;
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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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* 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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*/
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unsigned int no_force_dots :1;
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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.
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*/
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unsigned int allow_full_ascii :1;
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/**
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* Allow paths in the Joliet tree to have more than 240 characters.
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*/
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unsigned int joliet_longer_paths :1;
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unsigned int sort_files:1;
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/**< If files should be sorted based on their weight. */
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/**
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* The following options set the default values for files and directory
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* permissions, gid and uid. All these take one of three values: 0, 1 or 2.
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* If 0, the corresponding attribute will be kept as set in the IsoNode.
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* Unless you have changed it, it corresponds to the value on disc, so it
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* is suitable for backup purposes. If set to 1, the corresponding attrib.
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* will be changed by a default suitable value. Finally, if you set it to
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* 2, the attrib. will be changed with the value specified in the options
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* below. Note that for mode attributes, only the permissions are set, the
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* file type remains unchanged.
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*/
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unsigned int replace_dir_mode :2;
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unsigned int replace_file_mode :2;
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unsigned int replace_uid :2;
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unsigned int replace_gid :2;
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mode_t dir_mode; /** Mode to use on dirs when replace_dir_mode == 2. */
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mode_t file_mode; /** Mode to use on files when replace_file_mode == 2. */
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uid_t uid; /** uid to use when replace_uid == 2. */
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gid_t gid; /** gid to use when replace_gid == 2. */
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char *output_charset; /**< NULL to use default charset */
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/* Options for image transport */
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/** The number of bytes to be used for the fifo which decouples libisofs
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and libburn for better throughput and for reducing the risk of
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interrupting signals hitting the libburn thread which operates the
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MMC drive.
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The size will be rounded up to the next full 2048.
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Minimum is 64kiB, maximum is 1 GiB (but that is too much anyway).
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*/
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int fifo_size;
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/** Output value: Block address of session start as evaluatedfrom media
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and other options by libisoburn and libburn.
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If <0 : Invalid
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If >=0: Valid block number. Block size is always 2 KiB.
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*/
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int effective_lba;
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};
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/* Alignment for session starts on overwriteable media.
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(Increased from 16 to 32 blocks for aligning to BD-RE clusters.)
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*/
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#define Libisoburn_nwa_alignemenT 32
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/* Alignment for outer session scanning with -ROM drives.
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(E.g. my DVD-ROM drive shows any DVD type as 0x10 "DVD-ROM" with
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more or less false capacity and TOC.)
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*/
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#define Libisoburn_toc_scan_alignemenT 16
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/* Maximum gap to be bridged during a outer TOC scan. Gaps appear between the
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end of a session and the start of the next session.
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The longest gap found so far was about 38100 after the first session of a
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DVD-R.
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*/
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#define Libisoburn_toc_scan_max_gaP 65536
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/* Creating a chain of image headers which form a TOC:
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The header of the first session is written after the LBA 0 header.
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So it persists and can give the end of its session. By help of
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Libisoburn_nwa_alignemenT it should be possible to predict the start
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of the next session header.
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The LBA 0 header is written by isoburn_activate_session() already
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with the first session. So the media is mountable.
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A problem arises with DVD-RW in Intermediate State. They cannot be
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written by random access before they were written sequentially.
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In this case, no copy of the session 1 header is maintained and no TOC
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will be possible. Thus writing begins sequentially at LBA 0.
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*/
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#define Libisoburn_overwriteable_starT \
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((off_t) (Libisoburn_target_head_sizE/2048))
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/* Wrappers for emulation of TOC on overwriteable media */
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struct isoburn_toc_track {
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/* Either track or toc_entry are supposed to be NULL */
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struct burn_track *track;
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struct isoburn_toc_entry *toc_entry;
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};
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struct isoburn_toc_session {
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/* Either session or tracks and toc_entry are supposed to be NULL */
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struct burn_session *session;
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struct isoburn_toc_track **track_pointers;
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int track_count;
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struct isoburn_toc_entry *toc_entry;
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};
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struct isoburn_toc_disc {
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/* Either disc or sessions and toc are supposed to be NULL */
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struct burn_disc *disc;
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struct isoburn_toc_session *sessions; /* storage array */
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struct isoburn_toc_session **session_pointers; /* storage array */
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struct isoburn_toc_track *tracks; /* storage array */
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struct isoburn_toc_track **track_pointers; /* storage array */
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int session_count;
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int track_count;
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struct isoburn_toc_entry *toc;
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};
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#endif /* Isoburn_includeD */
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