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613 lines
22 KiB
613 lines
22 KiB
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/* |
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Class struct of libisoburn. |
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|
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Copyright 2007 - 2010 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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|
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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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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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/* >>> TWINTREE : provisory test of partition offset with emulated TOC. |
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.target_iso_head must become dynamically allocated |
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#define Libisoburn_partition_offseT 16 |
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*/ |
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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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#ifdef Libisoburn_partition_offseT |
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#define Libisoburn_target_head_sizE (32*2048 +Libisoburn_partition_offseT*2048) |
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#else |
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#define Libisoburn_target_head_sizE (32*2048) |
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#endif |
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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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/* 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 nomd5:1; /* 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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}; |
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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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/* 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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/* 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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* 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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* 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. |
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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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/** |
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* Store timestamps as GMT rather than in local time. |
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*/ |
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unsigned int always_gmt :1; |
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/** |
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* Write Rock Ridge info as of specification RRIP-1.10 rather than |
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* RRIP-1.12: signature "RRIP_1991A" rather than "IEEE_1282", |
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* field PX without file serial number |
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*/ |
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unsigned int rrip_version_1_10 :1; |
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/** |
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* Store as ECMA-119 Directory Record timestamp the mtime |
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* of the source rather than the image creation time. |
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*/ |
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unsigned int dir_rec_mtime :1; |
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/** |
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* Write AAIP as extension according to SUSP 1.10 rather than SUSP 1.12. |
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* I.e. without announcing it by an ER field and thus without the need |
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* to preceed the RRIP fields by an ES and to preceed the AA field by ES. |
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*/ |
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unsigned int aaip_susp_1_10 :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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|
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/** Output value: Block address of session start as evaluated from 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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/** Output value: Block address of data section start as predicted by |
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libisofs. |
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If < 16: Invalid |
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If >=16: Valid block number. Block size is always 2 KiB. |
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*/ |
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int data_start_lba; |
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/** |
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* If not empty: Parameters "name" and "timestamp" for a scdbackup stream |
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* checksum tag. See scdbackup/README appendix VERIFY. |
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* It makes sense only for single session images which start at LBA 0. |
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* Such a tag may be part of a libisofs checksum tag block after the |
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* session tag line. It then covers the whole session up to its own start |
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* position. |
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* If scdbackup_tag_written is not NULL then it is a pointer to an |
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* application provided array with at least 512 characters. The effectively |
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* written scdbackup tag will be copied to this memory location. |
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*/ |
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char scdbackup_tag_name[81]; |
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char scdbackup_tag_time[19]; |
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char *scdbackup_tag_written; |
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/* Content of an embedded boot image. Valid if not NULL. |
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* In that case it must point to a memory buffer at least 32 kB. |
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*/ |
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char *system_area_data; |
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/* |
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* bit0= make bytes 446 - 512 of the system area a partition |
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* table which reserves partition 1 from byte 63*512 to the |
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* end of the ISO image. Assumed are 63 secs/hed, 255 head/cyl. |
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* (GRUB protective msdos label.) |
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* This works with and without system_area_data. |
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*/ |
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int system_area_options; |
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|
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/* User settable PVD time stamps */ |
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time_t vol_creation_time; |
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time_t vol_modification_time; |
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time_t vol_expiration_time; |
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time_t vol_effective_time; |
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/* To eventually override vol_modification_time by unconverted string |
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and timezone 0 */ |
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char vol_uuid[17]; |
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/* TWINTREE: The number of unclaimed 2K blocks before |
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start of partition 1 as of the MBR in system area. |
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If not 0 this will cause double volume descriptor sets |
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and double tree. |
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*/ |
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uint32_t partition_offset; |
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/* TWINTREE: Partition table parameter: 1 to 63, 0= disabled/default */ |
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int partition_secs_per_head; |
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/* TWINTREE: 1 to 255, 0= disabled/default */ |
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int partition_heads_per_cyl; |
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|
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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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|
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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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|
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/* Wrappers for emulation of TOC on overwriteable media */ |
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|
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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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|
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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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|
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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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|
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#endif /* Isoburn_includeD */ |
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