664 lines
23 KiB
C
664 lines
23 KiB
C
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/* test/libburner.c , API illustration of burning data or audio tracks to CD */
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/* Copyright (C) 2005 - 2006 Thomas Schmitt <scdbackup@gmx.net> */
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/* Provided under GPL, see also "License and copyright aspects" at file end */
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/** Overview
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libburner is a minimal demo application for the library libburn as provided
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on http://libburnia.pykix.org . It can list the available devices, can
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blank a CD-RW and can burn to CD-R or CD-RW.
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It's main purpose, nevertheless, is to show you how to use libburn and also
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to serve the libburnia team as reference application. libburner.c does indeed
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define the standard way how above three gestures can be implemented and
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stay upward compatible for a good while.
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Before you can do anything, you have to initialize libburn by
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burn_initialize()
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and provide some signal and abort handling, e.g. by the builtin handler, by
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burn_set_signal_handling()
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as it is done in main() at the end of this file. Then you aquire a
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drive in an appropriate way conforming to the API. The two main
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approaches are shown here in application functions:
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libburner_aquire_by_adr() demonstrates usage as of cdrecord traditions
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libburner_aquire_by_driveno() demonstrates a scan-and-choose approach
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With that aquired drive you can blank a CD-RW
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libburner_blank_disc()
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With the aquired drive you can burn to CD-R or blank CD-RW
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libburner_payload()
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When everything is done, main() releases the drive and shuts down libburn:
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burn_drive_release();
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burn_finish()
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*/
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/** See this for the decisive API specs . libburn.h is The Original */
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/* For using the installed header file : #include <libburn/libburn.h> */
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/* This program insists in the own headerfile. */
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#include "../libburn/libburn.h"
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/* libburn is intended for Linux systems with kernel 2.4 or 2.6 for now */
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#include <stdio.h>
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#include <ctype.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <string.h>
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#include <stdlib.h>
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#include <time.h>
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#include <errno.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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/** For simplicity i use global variables to represent the drives.
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Drives are systemwide global, so we do not give away much of good style.
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*/
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/** This list will hold the drives known to libburn. This might be all CD
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drives of the system and thus might impose severe impact on the system.
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*/
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static struct burn_drive_info *drive_list;
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/** If you start a long lasting operation with drive_count > 1 then you are
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not friendly to the users of other drives on those systems. Beware. */
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static unsigned int drive_count;
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/** This variable indicates wether the drive is grabbed and must be
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finally released */
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static int drive_is_grabbed = 0;
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/* Some in-advance definitions to allow a more comprehensive ordering
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of the functions and their explanations in here */
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int libburner_aquire_by_adr(char *drive_adr);
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int libburner_aquire_by_driveno(int *drive_no);
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/* ------------------------------- API gestures ---------------------------- */
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/** You need to aquire a drive before burning. The API offers this as one
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compact call and alternatively as application controllable gestures of
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whitelisting, scanning for drives and finally grabbing one of them.
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If you have a persistent address of the drive, then the compact call is
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to prefer because it only touches one drive. On modern Linux kernels,
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there should be no fatal disturbance of ongoing burns of other libburn
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instances with any of our approaches. We use open(O_EXCL) by default.
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On /dev/hdX it should cooperate with growisofs and some cdrecord variants.
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On /dev/sgN versus /dev/scdM expect it not to respect other programs.
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*/
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int libburner_aquire_drive(char *drive_adr, int *driveno)
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{
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int ret;
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if(drive_adr != NULL && drive_adr[0] != 0)
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ret = libburner_aquire_by_adr(drive_adr);
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else
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ret = libburner_aquire_by_driveno(driveno);
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return ret;
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}
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/** If the persistent drive address is known, then this approach is much
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more un-obtrusive to the systemwide livestock of drives. Only the
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given drive device will be opened during this procedure.
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*/
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int libburner_aquire_by_adr(char *drive_adr)
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{
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int ret;
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char libburn_drive_adr[BURN_DRIVE_ADR_LEN];
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/* This tries to resolve links or alternative device files */
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ret = burn_drive_convert_fs_adr(drive_adr, libburn_drive_adr);
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if (ret<=0) {
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fprintf(stderr,"Address does not lead to a CD burner: '%s'\n",
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drive_adr);
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return ret;
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}
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printf("Aquiring drive '%s' ...\n",libburn_drive_adr);
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ret = burn_drive_scan_and_grab(&drive_list,libburn_drive_adr,1);
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if (ret <= 0) {
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fprintf(stderr,"FAILURE with persistent drive address '%s'\n",
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libburn_drive_adr);
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} else {
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printf("Done\n");
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drive_is_grabbed = 1;
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}
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return ret;
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}
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/** This method demonstrates how to use libburn without knowing a persistent
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drive address in advance. It has to make sure that after assessing the list
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of available drives, all unwanted drives get closed again. As long as they
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are open, no other libburn instance can see them. This is an intended
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locking feature. The application is responsible for giving up the locks
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by either burn_drive_release() (only after burn_drive_grab() !),
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burn_drive_info_forget(), burn_drive_info_free(), or burn_finish().
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@param driveno the index number in libburn's drive list. This will get
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set to 0 on success and will then be the drive index to
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use in the further dourse of processing.
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@return 1 success , <= 0 failure
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*/
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int libburner_aquire_by_driveno(int *driveno)
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{
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char adr[BURN_DRIVE_ADR_LEN];
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int ret, i;
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printf("Beginning to scan for devices ...\n");
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while (!burn_drive_scan(&drive_list, &drive_count))
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usleep(1002);
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if (drive_count <= 0 && *driveno >= 0) {
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printf("FAILED (no drives found)\n");
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return 0;
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}
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printf("Done\n");
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/*
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Interactive programs may choose the drive number at this moment.
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drive[0] to drive[drive_count-1] are struct burn_drive_info
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as defined in libburn/libburn.h . This structure is part of API
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and thus will strive for future compatibility on source level.
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Have a look at the info offered.
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Caution: do not take .location for drive address. Always use
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burn_drive_get_adr() or you might become incompatible
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in future.
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Note: bugs with struct burn_drive_info - if any - will not be
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easy to fix. Please report them but also strive for
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workarounds on application level.
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*/
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printf("\nOverview of accessible drives (%d found) :\n",
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drive_count);
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printf("-----------------------------------------------------------------------------\n");
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for (i = 0; i < drive_count; i++) {
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if (burn_drive_get_adr(&(drive_list[i]), adr) <=0)
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strcpy(adr, "-get_adr_failed-");
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printf("%d --drive '%s' : '%s' '%s'\n",
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i,adr,drive_list[i].vendor,drive_list[i].product);
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}
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printf("-----------------------------------------------------------------------------\n\n");
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/*
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On multi-drive systems save yourself from sysadmins' revenge.
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Be aware that you hold reserved all available drives at this point.
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So either make your choice quick enough not to annoy other system
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users, or set free the drives for a while.
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The tested way of setting free all drives is to shutdown the library
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and to restart when the choice has been made. The list of selectable
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drives should also hold persistent drive addresses as obtained
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above by burn_drive_get_adr(). By such an address one may use
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burn_drive_scan_and_grab() to finally aquire exactly one drive.
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A not yet tested shortcut should be to call burn_drive_info_free()
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and to call either burn_drive_scan() or burn_drive_scan_and_grab()
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before accessing any drives again.
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In both cases you have to be aware that the desired drive might get
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aquired in the meantime by another user resp. libburn process.
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*/
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/* We already made our choice via command line. (default is 0)
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So we just have to keep our desired drive and drop all others.
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No other libburn instance will have a chance to steal our drive.
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*/
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if (*driveno < 0) {
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printf("Pseudo-drive \"-\" given : bus scanning done.\n");
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return 2; /* the program will end after this */
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}
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if (drive_count <= *driveno) {
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fprintf(stderr,
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"Found only %d drives. Number %d not available.\n",
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drive_count, *driveno);
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return 0; /* the program will end after this */
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}
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/* Drop all drives which we do not want to use */
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for (i = 0; i < drive_count; i++) {
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if (i == *driveno) /* the one drive we want to keep */
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continue;
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ret = burn_drive_info_forget(&(drive_list[i]),0);
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if (ret != 1)
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fprintf(stderr, "Cannot drop drive %d. Please report \"ret=%d\" to libburn-hackers@pykix.org\n",
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i, ret);
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else
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printf("Dropped unwanted drive %d\n",i);
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}
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/* Make the one we want ready for blanking or burning */
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ret= burn_drive_grab(drive_list[*driveno].drive, 1);
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if (ret != 1)
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return 0;
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drive_is_grabbed = 1;
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return 1;
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}
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/** Makes a previously used CD-RW ready for thorough re-usal.
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To our knowledge it is hardly possible to abort an ongoing blank operation
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because after start it is entirely handled by the drive.
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So expect signal handling to wait the normal blanking timespan until it
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can allow the process to end. External kill -9 will not help the drive.
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*/
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int libburner_blank_disc(struct burn_drive *drive, int blank_fast)
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{
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enum burn_disc_status disc_state;
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struct burn_progress p;
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int percent = 1;
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while (burn_drive_get_status(drive, NULL) != BURN_DRIVE_IDLE)
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usleep(1001);
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while ((disc_state = burn_disc_get_status(drive)) == BURN_DISC_UNREADY)
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usleep(1001);
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printf(
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"Drive media status: %d (see libburn/libburn.h BURN_DISC_*)\n",
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disc_state);
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if (disc_state == BURN_DISC_BLANK) {
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fprintf(stderr,
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"IDLE: Blank CD media detected. Will leave it untouched\n");
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return 2;
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} else if (disc_state == BURN_DISC_FULL ||
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disc_state == BURN_DISC_APPENDABLE) {
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; /* this is what libburn is willing to blank */
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} else if (disc_state == BURN_DISC_EMPTY) {
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fprintf(stderr,"FATAL: No media detected in drive\n");
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return 0;
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} else {
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fprintf(stderr,
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"FATAL: Cannot recognize drive and media state\n");
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return 0;
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}
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if(!burn_disc_erasable(drive)) {
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fprintf(stderr,
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"FATAL : Media is not of erasable type\n");
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return 0;
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}
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printf(
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"Beginning to %s-blank CD media.\n", (blank_fast?"fast":"full"));
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burn_disc_erase(drive, blank_fast);
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sleep(1);
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while (burn_drive_get_status(drive, &p) != BURN_DRIVE_IDLE) {
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if(p.sectors>0 && p.sector>=0) /* display 1 to 99 percent */
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percent = 1.0 + ((double) p.sector+1.0)
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/ ((double) p.sectors) * 98.0;
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printf("Blanking ( %d%% done )\n", percent);
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sleep(1);
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}
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printf("Done\n");
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return 1;
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}
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/** Brings preformatted track images (ISO 9660, audio, ...) onto media.
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To make sure a data image is fully readable on any Linux machine, this
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function adds 300 kB of padding to the (usualy single) track.
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Audio tracks get padded to complete their last sector.
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In case of external signals expect abort handling of an ongoing burn to
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last up to a minute. Wait the normal burning timespan before any kill -9.
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*/
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int libburner_payload(struct burn_drive *drive,
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char source_adr[][4096], int source_adr_count,
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int multi, int simulate_burn, int all_tracks_type)
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{
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struct burn_source *data_src;
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struct burn_disc *target_disc;
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struct burn_session *session;
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struct burn_write_opts *burn_options;
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enum burn_disc_status disc_state;
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struct burn_track *track, *tracklist[99];
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struct burn_progress progress;
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time_t start_time;
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int last_sector = 0, padding = 0, trackno, write_mode_tao = 0, fd;
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off_t fixed_size;
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char *adr;
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struct stat stbuf;
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if (all_tracks_type != BURN_AUDIO) {
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all_tracks_type = BURN_MODE1;
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/* a padding of 300 kB helps to avoid the read-ahead bug */
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padding = 300*1024;
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}
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target_disc = burn_disc_create();
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session = burn_session_create();
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burn_disc_add_session(target_disc, session, BURN_POS_END);
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for (trackno = 0 ; trackno < source_adr_count; trackno++) {
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tracklist[trackno] = track = burn_track_create();
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burn_track_define_data(track, 0, padding, 1, all_tracks_type);
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adr = source_adr[trackno];
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fixed_size = 0;
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if (adr[0] == '-' && adr[1] == 0) {
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fd = 0;
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} else {
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fd = open(adr, O_RDONLY);
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if (fd>=0)
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if (fstat(fd,&stbuf)!=-1)
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if((stbuf.st_mode&S_IFMT)==S_IFREG)
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fixed_size = stbuf.st_size;
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}
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if (fixed_size==0)
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write_mode_tao = 1;
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data_src = NULL;
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if (fd>=0)
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data_src = burn_fd_source_new(fd, -1, fixed_size);
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if (data_src == NULL) {
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fprintf(stderr,
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"FATAL: Could not open data source '%s'.\n",adr);
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if(errno!=0)
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fprintf(stderr,"(Most recent system error: %s )\n",
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strerror(errno));
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return 0;
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}
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if (burn_track_set_source(track, data_src) != BURN_SOURCE_OK) {
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printf("FATAL: Cannot attach source object to track object\n");
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return 0;
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}
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burn_session_add_track(session, track, BURN_POS_END);
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printf("Track %d : source is '%s'\n", trackno+1, adr);
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burn_source_free(data_src);
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} /* trackno loop end */
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while (burn_drive_get_status(drive, NULL) != BURN_DRIVE_IDLE)
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usleep(100001);
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/* Evaluate drive and media */
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while ((disc_state = burn_disc_get_status(drive)) == BURN_DISC_UNREADY)
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usleep(100001);
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if (disc_state == BURN_DISC_APPENDABLE) {
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write_mode_tao = 1;
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} else if (disc_state != BURN_DISC_BLANK) {
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if (disc_state == BURN_DISC_FULL) {
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fprintf(stderr, "FATAL: Closed media with data detected. Need blank or appendable media.\n");
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if (burn_disc_erasable(drive))
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fprintf(stderr, "HINT: Try --blank_fast\n\n");
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} else if (disc_state == BURN_DISC_EMPTY)
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fprintf(stderr,"FATAL: No media detected in drive\n");
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else
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fprintf(stderr,
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"FATAL: Cannot recognize state of drive and media\n");
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return 0;
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}
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burn_options = burn_write_opts_new(drive);
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burn_write_opts_set_perform_opc(burn_options, 0);
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burn_write_opts_set_multi(burn_options, !!multi);
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if (write_mode_tao)
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burn_write_opts_set_write_type(burn_options,
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BURN_WRITE_TAO, BURN_BLOCK_MODE1);
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else
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burn_write_opts_set_write_type(burn_options,
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BURN_WRITE_SAO, BURN_BLOCK_SAO);
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if(simulate_burn)
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printf("\n*** Will TRY to SIMULATE burning ***\n\n");
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burn_write_opts_set_simulate(burn_options, simulate_burn);
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burn_structure_print_disc(target_disc);
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burn_drive_set_speed(drive, 0, 0);
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burn_write_opts_set_underrun_proof(burn_options, 1);
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printf("Burning starts. With e.g. 4x media expect up to a minute of zero progress.\n");
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start_time = time(0);
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burn_disc_write(burn_options, target_disc);
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burn_write_opts_free(burn_options);
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while (burn_drive_get_status(drive, NULL) == BURN_DRIVE_SPAWNING)
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usleep(1002);
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while (burn_drive_get_status(drive, &progress) != BURN_DRIVE_IDLE) {
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if( progress.sectors <= 0 || progress.sector == last_sector)
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printf(
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"Thank you for being patient since %d seconds.\n",
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(int) (time(0) - start_time));
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else if(write_mode_tao)
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printf("Track %d : sector %d\n", progress.track+1,
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progress.sector);
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else
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printf("Track %d : sector %d of %d\n",progress.track+1,
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progress.sector, progress.sectors);
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last_sector = progress.sector;
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sleep(1);
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}
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printf("\n");
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for (trackno = 0 ; trackno < source_adr_count; trackno++)
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burn_track_free(tracklist[trackno]);
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burn_session_free(session);
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burn_disc_free(target_disc);
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if (multi)
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printf("NOTE: Media left appendable.\n");
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if (simulate_burn)
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printf("\n*** Did TRY to SIMULATE burning ***\n\n");
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return 1;
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}
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/** The setup parameters of libburner */
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static char drive_adr[BURN_DRIVE_ADR_LEN] = {""};
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static int driveno = 0;
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static int do_blank = 0;
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static char source_adr[99][4096];
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static int source_adr_count = 0;
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static int do_multi = 0;
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static int simulate_burn = 0;
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static int all_tracks_type = BURN_MODE1;
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/** Converts command line arguments into above setup parameters.
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drive_adr[] must provide at least BURN_DRIVE_ADR_LEN bytes.
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source_adr[] must provide at least 4096 bytes.
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*/
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int libburner_setup(int argc, char **argv)
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{
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int i, insuffient_parameters = 0, print_help = 0;
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for (i = 1; i < argc; ++i) {
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if (!strcmp(argv[i], "--audio")) {
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all_tracks_type = BURN_AUDIO;
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} else if (!strcmp(argv[i], "--blank_fast")) {
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do_blank = 1;
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|
} else if (!strcmp(argv[i], "--blank_full")) {
|
|
do_blank = 2;
|
|
|
|
} else if (!strcmp(argv[i], "--burn_for_real")) {
|
|
simulate_burn = 0;
|
|
|
|
} else if (!strcmp(argv[i], "--drive")) {
|
|
++i;
|
|
if (i >= argc) {
|
|
fprintf(stderr,"--drive requires an argument\n");
|
|
return 1;
|
|
} else if (strcmp(argv[i], "-") == 0) {
|
|
drive_adr[0] = 0;
|
|
driveno = -1;
|
|
} else if (isdigit(argv[i][0])) {
|
|
drive_adr[0] = 0;
|
|
driveno = atoi(argv[i]);
|
|
} else {
|
|
if(strlen(argv[i]) >= BURN_DRIVE_ADR_LEN) {
|
|
fprintf(stderr,"--drive address too long (max. %d)\n",
|
|
BURN_DRIVE_ADR_LEN-1);
|
|
return 2;
|
|
}
|
|
strcpy(drive_adr, argv[i]);
|
|
}
|
|
} else if (!strcmp(argv[i], "--multi")) {
|
|
do_multi = 1;
|
|
|
|
} else if (!strcmp(argv[i], "--stdin_size")) { /* obsoleted */
|
|
i++;
|
|
|
|
} else if (!strcmp(argv[i], "--try_to_simulate")) {
|
|
simulate_burn = 1;
|
|
|
|
} else if (!strcmp(argv[i], "--help")) {
|
|
print_help = 1;
|
|
|
|
} else if (!strncmp(argv[i], "--",2)) {
|
|
fprintf(stderr, "Unidentified option: %s\n", argv[i]);
|
|
return 7;
|
|
} else {
|
|
if(strlen(argv[i]) >= 4096) {
|
|
fprintf(stderr, "Source address too long (max. %d)\n", 4096-1);
|
|
return 5;
|
|
}
|
|
if(source_adr_count >= 99) {
|
|
fprintf(stderr, "Too many tracks (max. 99)\n");
|
|
return 6;
|
|
}
|
|
strcpy(source_adr[source_adr_count], argv[i]);
|
|
source_adr_count++;
|
|
}
|
|
}
|
|
insuffient_parameters = 1;
|
|
if (driveno < 0)
|
|
insuffient_parameters = 0;
|
|
if (source_adr_count > 0)
|
|
insuffient_parameters = 0;
|
|
if (do_blank)
|
|
insuffient_parameters = 0;
|
|
if (print_help || insuffient_parameters ) {
|
|
printf("Usage: %s\n", argv[0]);
|
|
printf(" [--drive <address>|<driveno>|\"-\"] [--audio]\n");
|
|
printf(" [--blank_fast|--blank_full] [--try_to_simulate]\n");
|
|
printf(" [--multi] [<one or more imagefiles>|\"-\"]\n");
|
|
printf("Examples\n");
|
|
printf("A bus scan (needs rw-permissions to see a drive):\n");
|
|
printf(" %s --drive -\n",argv[0]);
|
|
printf("Burn a file to drive chosen by number, leave appendable:\n");
|
|
printf(" %s --drive 0 --multi my_image_file\n", argv[0]);
|
|
printf("Burn a file to drive chosen by persistent address, close:\n");
|
|
printf(" %s --drive /dev/hdc my_image_file\n", argv[0]);
|
|
printf("Blank a used CD-RW (is combinable with burning in one run):\n");
|
|
printf(" %s --drive /dev/hdc --blank_fast\n",argv[0]);
|
|
printf("Burn two audio tracks\n");
|
|
printf(" lame --decode -t /path/to/track1.mp3 track1.cd\n");
|
|
printf(" test/dewav /path/to/track2.wav -o track2.cd\n");
|
|
printf(" %s --drive /dev/hdc --audio track1.cd track2.cd\n", argv[0]);
|
|
printf("Burn a compressed afio archive on-the-fly:\n");
|
|
printf(" ( cd my_directory ; find . -print | afio -oZ - ) | \\\n");
|
|
printf(" %s --drive /dev/hdc -\n", argv[0]);
|
|
printf("To be read from *not mounted* CD via: afio -tvZ /dev/hdc\n");
|
|
printf("Program tar would need a clean EOF which our padded CD cannot deliver.\n");
|
|
if (insuffient_parameters)
|
|
return 6;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
int ret;
|
|
|
|
ret = libburner_setup(argc, argv);
|
|
if (ret)
|
|
exit(ret);
|
|
|
|
printf("Initializing libburnia.pykix.org ...\n");
|
|
if (burn_initialize())
|
|
printf("Done\n");
|
|
else {
|
|
printf("FAILED\n");
|
|
fprintf(stderr,"\nFATAL: Failed to initialize.\n");
|
|
exit(33);
|
|
}
|
|
|
|
/* Print messages of severity SORRY or more directly to stderr */
|
|
burn_msgs_set_severities("NEVER", "SORRY", "libburner : ");
|
|
|
|
/* Activate the default signal handler which eventually will try to
|
|
properly shutdown drive and library on aborting events. */
|
|
burn_set_signal_handling("libburner : ", NULL, 0);
|
|
|
|
/** Note: driveno might change its value in this call */
|
|
ret = libburner_aquire_drive(drive_adr, &driveno);
|
|
if (ret<=0) {
|
|
fprintf(stderr,"\nFATAL: Failed to aquire drive.\n");
|
|
{ ret = 34; goto finish_libburn; }
|
|
}
|
|
if (ret == 2)
|
|
{ ret = 0; goto release_drive; }
|
|
if (do_blank) {
|
|
ret = libburner_blank_disc(drive_list[driveno].drive,
|
|
do_blank == 1);
|
|
if (ret<=0)
|
|
{ ret = 36; goto release_drive; }
|
|
}
|
|
if (source_adr_count > 0) {
|
|
ret = libburner_payload(drive_list[driveno].drive,
|
|
source_adr, source_adr_count,
|
|
do_multi, simulate_burn, all_tracks_type);
|
|
if (ret<=0)
|
|
{ ret = 38; goto release_drive; }
|
|
}
|
|
ret = 0;
|
|
release_drive:;
|
|
if (drive_is_grabbed)
|
|
burn_drive_release(drive_list[driveno].drive, 0);
|
|
|
|
finish_libburn:;
|
|
/* This app does not bother to know about exact scan state.
|
|
Better to accept a memory leak here. We are done anyway. */
|
|
/* burn_drive_info_free(drive_list); */
|
|
|
|
burn_finish();
|
|
exit(ret);
|
|
}
|
|
|
|
|
|
/* License and copyright aspects:
|
|
|
|
This all is provided under GPL.
|
|
Read. Try. Think. Play. Write yourself some code. Be free of my copyright.
|
|
|
|
Be also invited to study the code of cdrskin/cdrskin.c et al.
|
|
|
|
|
|
Clarification in my name and in the name of Mario Danic, copyright holder
|
|
on toplevel of libburnia. To be fully in effect after the remaining other
|
|
copyrighted code has been replaced by ours and by copyright-free contributions
|
|
of our friends:
|
|
|
|
We, the copyright holders, agree on the interpretation that
|
|
dynamical linking of our libraries constitutes "use of" and
|
|
not "derivation from" our work in the sense of GPL, provided
|
|
those libraries are compiled from our unaltered code.
|
|
|
|
Thus you may link our libraries dynamically with applications
|
|
which are not under GPL. You may distribute our libraries and
|
|
application tools in binary form, if you fulfill the usual
|
|
condition of GPL to offer a copy of the source code -altered
|
|
or unaltered- under GPL.
|
|
|
|
We ask you politely to use our work in open source spirit
|
|
and with the due reference to the entire open source community.
|
|
|
|
If there should really arise the case where above clarification
|
|
does not suffice to fulfill a clear and neat request in open source
|
|
spirit that would otherwise be declined for mere formal reasons,
|
|
only in that case we will duely consider to issue a special license
|
|
covering only that special case.
|
|
It is the open source idea of responsible freedom which will be
|
|
decisive and you will have to prove that you exhausted all own
|
|
means to qualify for GPL.
|
|
|
|
For now we are firmly committed to maintain one single license: GPL.
|
|
|
|
History:
|
|
libburner is a compilation of my own contributions to test/burniso.c and
|
|
fresh code which replaced the remaining parts under copyright of
|
|
Derek Foreman.
|
|
My respect and my thanks to Derek for providing me a start back in 2005.
|
|
|
|
*/
|
|
|