372 lines
7.4 KiB
C
372 lines
7.4 KiB
C
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/*
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cc -g -c \
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-D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE=1 -D_LARGEFILE64_SOURCE \
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burn_wrap.c
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*/
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/* libburn wrappers for libisoburn
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Copyright 2007 Thomas Schmitt, <scdbackup@gmx.net>
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*/
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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 <sys/stat.h>
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#include <fcntl.h>
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#include "../libburn/libburn.h"
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#include "../libisofs/libisofs.h"
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#include "libisoburn.h"
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#include "isoburn.h"
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/* The global list of isoburn objects. Usually there is only one. */
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extern struct isoburn *isoburn_list_start; /* in isoburn.c */
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int isoburn_initialize(void)
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{
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if(!iso_init())
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return(0);
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if(!burn_initialize())
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return(0);
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isoburn_destroy_all(&isoburn_list_start, 0); /* isoburn_list_start= NULL */
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return(1);
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}
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/** Examine the media and sets appropriate emulation if needed.
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*/
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static int isoburn_welcome_media(struct isoburn **o, struct burn_drive *d,
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int flag)
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{
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int ret;
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struct burn_multi_caps *caps= NULL;
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ret= burn_disc_get_multi_caps(d, BURN_WRITE_NONE, &caps, 0);
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if(ret<=0)
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goto ex;
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ret= isoburn_new(o, 0);
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if(ret<=0)
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goto ex;
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(*o)->drive= d;
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if(caps->start_adr) { /* set emulation to overwriteable */
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(*o)->emulation_mode= 1;
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ret= isoburn_start_emulation(*o, 0);
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if(ret<=0) {
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(*o)->emulation_mode= -1;
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goto ex;
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}
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} else {
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/* >>> recognize unsuitable media */;
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}
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/* <<< now planned to be done by app
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ret = isoburn_read_volset(*o);
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if(ret<=0) {
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(*o)->emulation_mode= -1;
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goto ex;
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}
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*/
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ret= 1;
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ex:
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if(caps!=NULL)
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burn_disc_free_multi_caps(&caps);
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return(ret);
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}
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int isoburn_drive_scan_and_grab(struct burn_drive_info *drive_infos[],
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char *adr, int load)
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{
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int ret, treatment= 0;
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struct stat stbuf;
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char libburn_drive_adr[BURN_DRIVE_ADR_LEN], *adrpt, *stdio_adr= NULL;
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struct isoburn *o= NULL;
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adrpt= adr;
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if(strncmp(adr, "grow:", 5)==0) {
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treatment= 1;
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adrpt+= 5;
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if(stat(adrpt,&stbuf)!=-1)
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if(S_ISREG(stbuf.st_mode) || S_ISBLK(stbuf.st_mode)) {
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stdio_adr= calloc(strlen(adrpt)+6+1, 1);
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if(stdio_adr==NULL)
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{ret= -1; goto ex;}
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sprintf(stdio_adr, "stdio:%s", adrpt); /* use pseudo-drive */
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adrpt= stdio_adr;
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}
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} else if(strncmp(adr, "modify:", 7)==0) {
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treatment= 2;
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adrpt+= 7;
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}
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ret= burn_drive_convert_fs_adr(adrpt, libburn_drive_adr);
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if(treatment==0) {
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if(ret>0)
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treatment= 1;
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else
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treatment= 2;
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} else if(treatment==1 && ret<=0) {
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/* >>> unsuitable drive address */;
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ret= 0; goto ex;
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}
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o->treatment= treatment;
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if(treatment==1) {
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ret= burn_drive_scan_and_grab(drive_infos, adrpt, load);
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if(ret<=0)
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goto ex;
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ret= isoburn_welcome_media(&o, (*drive_infos)[0].drive, 0);
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if(ret<=0)
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goto ex;
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} else {
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if(stat(adrpt,&stbuf)!=-1)
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if(! S_ISREG(stbuf.st_mode)) {
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/* >>> unsuitable target for modify */;
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ret= 0; goto ex;
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}
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/* >>> welcome file for modfication treatment */;
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}
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ret= 1;
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ex:
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if(ret<=0)
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isoburn_destroy(&o,0);
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if(stdio_adr!=NULL)
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free(stdio_adr);
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return(ret);
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}
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int isoburn_drive_grab(struct burn_drive *drive, int load)
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{
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int ret;
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struct isoburn *o= NULL;
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ret= burn_drive_grab(drive, load);
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if(ret<=0)
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goto ex;
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ret= isoburn_welcome_media(&o, drive, 0);
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if(ret<=0)
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goto ex;
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ret= 1;
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ex:
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if(ret<=0)
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isoburn_destroy(&o,0);
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return(ret);
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}
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/** Retrieve media emulation and eventual isoburn emulator of drive.
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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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{
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int ret;
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ret= isoburn_find_by_drive(pt, drive, 0);
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if(ret<=0)
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return(0);
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if((*pt)->emulation_mode==-1)
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return(-1);
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if((*pt)->emulation_mode==0)
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return(0);
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return(1);
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}
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enum burn_disc_status isoburn_disc_get_status(struct burn_drive *drive)
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{
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int ret;
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struct isoburn *o;
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ret= isoburn_find_emulator(&o, drive, 0);
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if(ret<0)
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return(BURN_DISC_UNSUITABLE);
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if(ret==0)
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return(burn_disc_get_status(drive));
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/* emulated status */
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if(o->emulation_mode==-1)
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return(BURN_DISC_UNSUITABLE);
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if(o->nwa>0)
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return(BURN_DISC_APPENDABLE);
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return(BURN_DISC_BLANK);
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}
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int isoburn_disc_erasable(struct burn_drive *d)
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{
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int ret;
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struct isoburn *o;
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ret= isoburn_find_emulator(&o, d, 0);
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if(ret>0)
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if(o->emulation_mode==1)
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return(1);
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return burn_disc_erasable(d);
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}
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void isoburn_disc_erase(struct burn_drive *drive, int fast)
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{
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int ret;
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struct isoburn *o;
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ret= isoburn_find_emulator(&o, drive, 0);
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if(ret>0) {
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if(o->emulation_mode==-1) {
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/* To cause a negative reply with burn_drive_wrote_well() */
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burn_drive_cancel(drive);
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return;
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}
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if(o->emulation_mode>0) {
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ret= isoburn_invalidate_iso(o, 0);
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if(ret<=0)
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burn_drive_cancel(drive);
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return;
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}
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}
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burn_disc_erase(drive, fast);
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}
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int isoburn_disc_get_msc1(struct burn_drive *d, int *start_lba)
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{
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int ret;
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struct isoburn *o;
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if(isoburn_disc_get_status(d)!=BURN_DISC_APPENDABLE)
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return(0);
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ret= isoburn_find_emulator(&o, d, 0);
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if(ret<0)
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return(0);
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if(ret==0)
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return(burn_disc_get_msc1(d, start_lba));
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*start_lba= 0;
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return(1);
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}
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int isoburn_disc_track_lba_nwa(struct burn_drive *d,
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struct burn_write_opts *opts,
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int trackno, int *lba, int *nwa)
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{
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int ret;
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struct isoburn *o;
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ret= isoburn_find_emulator(&o, d, 0);
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if(ret<0)
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return(0);
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if(ret==0)
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return(burn_disc_track_lba_nwa(d, opts, trackno, lba, nwa));
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*lba= 0;
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*nwa= o->nwa;
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return(1);
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}
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void isoburn_disc_write(struct burn_write_opts *opts, struct burn_disc *disc)
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{
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int ret, multi= 1;
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struct isoburn *o;
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struct burn_drive *drive;
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drive= burn_write_opts_get_drive(opts);
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ret= isoburn_find_emulator(&o, drive, 0);
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if(ret<0)
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return;
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if(o!=NULL)
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if(o->emulation_mode!=0)
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multi= 0;
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burn_write_opts_set_multi(opts, multi);
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burn_disc_write(opts, disc);
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}
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void isoburn_drive_release(struct burn_drive *drive, int eject)
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{
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int ret;
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struct isoburn *o;
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ret= isoburn_find_emulator(&o, drive, 0);
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if(ret<0)
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return;
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if(o!=NULL)
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isoburn_destroy(&o, 0);
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burn_drive_release(drive, eject);
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}
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void isoburn_finish(void)
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{
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isoburn_destroy_all(&isoburn_list_start, 0);
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burn_finish();
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iso_finish();
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}
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int isoburn_needs_emulation(struct burn_drive *drive)
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{
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int ret;
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struct isoburn *o;
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enum burn_disc_status s;
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s= isoburn_disc_get_status(drive);
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if(s!=BURN_DISC_BLANK && s!=BURN_DISC_APPENDABLE)
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return(-1);
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ret= isoburn_find_emulator(&o, drive, 0);
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if(ret<0)
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return(-1);
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if(ret>0)
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if(o->emulation_mode>0)
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return(1);
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return(0);
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}
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void isoburn_write_opts_set_start_byte(struct burn_write_opts *opts,
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off_t value)
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{
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int ret;
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struct isoburn *o;
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struct burn_drive *drive;
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struct burn_multi_caps *caps= NULL;
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drive= burn_write_opts_get_drive(opts);
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ret= isoburn_find_emulator(&o, drive, 0);
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if(ret<=0) /* no emulation, no burn_write_opts_set_start_byte() */
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goto ex;
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ret= burn_disc_get_multi_caps(drive, BURN_WRITE_NONE, &caps, 0);
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if(ret<=0)
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goto ex;
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o->min_start_byte= value;
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if(value % caps->start_alignment)
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value+= caps->start_alignment - (value % caps->start_alignment);
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o->nwa= value/2048;
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burn_write_opts_set_start_byte(opts, value);
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ex:
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if(caps!=NULL)
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burn_disc_free_multi_caps(&caps);
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}
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