Changes in plans as discussed up to Sep 5 2007
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a754f15e93
@ -53,14 +53,25 @@ static int isoburn_welcome_media(struct isoburn **o, struct burn_drive *d,
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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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if(caps->start_adr) { /* set emulation to overwriteable */
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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)->emulation_mode= 1;
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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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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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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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ret= 1;
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@ -72,48 +83,69 @@ ex:
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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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char *adr, int load)
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{
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int ret;
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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];
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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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ret= burn_drive_convert_fs_adr(adr, libburn_drive_adr);
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if(ret<0)
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return(ret);
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if(ret==0) {
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if(stat(adr,&stbuf)!=-1) {
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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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ret= burn_drive_grab_dummy(drive_infos, adr);
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if(ret<=0)
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return(ret);
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o->emulation_mode= 2; /* standard i/o */
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} else {
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/* >>> unsuitable file type */;
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return(0);
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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 {
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/* >>> file not found */;
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return(0);
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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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} else {
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ret= burn_drive_scan_and_grab(drive_infos, adr, load);
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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 media */;
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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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@ -237,98 +269,22 @@ int isoburn_disc_track_lba_nwa(struct burn_drive *d,
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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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#ifdef NIX
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int isoburn_random_access_write(struct burn_drive *d, off_t byte_address,
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char *data, off_t data_count, int flag)
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{
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int ret, mode = O_RDWR | O_LARGEFILE | O_CREAT;
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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(o->emulation_mode==2) {
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if(flag&1)
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mode|= O_SYNC;
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o->stdio_fd= open(o->stdio_path, mode);
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if(o->stdio_fd==-1) {
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/* >>> cannot open stdio_path */;
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return(0);
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}
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if(lseek(o->stdio_fd, byte_address, SEEK_SET)==-1) {
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/* >>> cannot reach given byte_address */;
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ret= 0; goto close_stdio;
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}
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if(write(o->stdio_fd, data, data_count) != data_count) {
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/* >>> cannot write desired number of bytes */;
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ret= 0; goto close_stdio;
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}
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ret= 1;
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close_stdio:;
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close(o->stdio_fd); o->stdio_fd= -1;
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} else if(o->emulation_mode==-1)
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ret= 0;
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else
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ret= burn_random_access_write(d, byte_address, data, data_count, flag);
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return(ret);
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}
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int burn_read_data(struct burn_drive *d, off_t byte_address,
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char data[], off_t data_size, off_t *data_count, int flag)
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{
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int ret, mode = O_RDONLY | O_LARGEFILE;
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off_t count, todo;
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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(o->emulation_mode==2) {
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o->stdio_fd= open(o->stdio_path, mode);
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if(o->stdio_fd==-1) {
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/* >>> cannot open stdio_path */;
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return(0);
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}
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if(lseek(o->stdio_fd, byte_address, SEEK_SET)==-1) {
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/* >>> cannot reach given byte_address */;
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ret= 0; goto close_stdio;
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}
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for(todo= data_size; todo>0; ) {
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count= read(o->stdio_fd, data+(data_size-todo), todo);
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if(count<=0)
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break;
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todo-= count;
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}
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if(todo>0) {
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/* >>> cannot read desired number of bytes */;
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ret= 0; goto close_stdio;
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}
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ret= 1;
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close_stdio:;
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close(o->stdio_fd); o->stdio_fd= -1;
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} else if(o->emulation_mode==-1)
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ret= 0;
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else
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ret= burn_read_data(d, byte_address, data, data_size, data_count, flag);
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return(ret);
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}
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#endif /* NIX */
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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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@ -380,7 +336,7 @@ void isoburn_write_opts_set_start_byte(struct burn_write_opts *opts,
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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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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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@ -49,12 +49,7 @@ int isoburn_new(struct isoburn **objpt, int flag)
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o->emulation_mode= 0;
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o->min_start_byte= 0;
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o->nwa= 0;
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#ifdef NIX
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o->stdio_path= NULL;
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o->stdio_fd= -1;
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#endif /* NIX */
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o->treatment= 1;
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o->target_ropts= NULL;
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o->new_wopts= NULL;
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for(i=0;i<65536;i++)
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@ -25,7 +25,6 @@ struct isoburn {
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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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/* 2= standard i/o file */
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int emulation_mode;
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/* Although rarely used, libburn can operate on several */
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@ -44,18 +43,12 @@ struct isoburn {
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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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#ifdef NIX
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/* Path for eventual stdandard i/o (see .emulation_mode) */
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char *stdio_path;
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/* File descriptor for stdandard i/o. Points to stdio_path object if not -1 */
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int stdio_fd;
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#endif /* NIX */
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/* --- Vreixo's part --- */
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/* Expansion treatment strategy: 1= grow, 2= modify, (any use for 0 ?) */
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int treatment;
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/* The options for reading the old image. */
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/* target_ropts.size will contain the number of blocks of the image. */
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struct ecma119_read_opts *target_ropts;
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@ -101,6 +94,7 @@ int isoburn_start_emulation(struct isoburn *o, int flag);
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int isoburn_new_rwopts(struct isoburn *o);
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int isoburn_free_rwopts(struct isoburn *o);
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int isoburn_invalidate_iso(struct isoburn *o, int flag);
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int isoburn_read_volset(struct isoburn *o);
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#endif /* Isoburn_includeD */
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@ -104,7 +104,7 @@ int isoburn_disc_track_lba_nwa(struct burn_drive *d, struct burn_write_opts *o,
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BURN_DRIVE_IDLE is returned.
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Wrapper for: burn_disc_write()
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*/
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int isoburn_disc_write(struct burn_write_opts *o, struct burn_disc *disc);
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void isoburn_disc_write(struct burn_write_opts *o, struct burn_disc *disc);
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/** Call this after isoburn_disc_write has finished and burn_drive_wrote_well()
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@ -112,7 +112,7 @@ int isoburn_disc_write(struct burn_write_opts *o, struct burn_disc *disc);
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multi-session functionality, if needed at all. Let libisoburn decide.
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Not a wrapper, but peculiar to libburn.
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*/
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int isoburn_update_iso_descriptors(struct burn_drive *drive);
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int isoburn_activate_session(struct burn_drive *drive);
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/** Release an aquired drive.
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