Implemented use of stdio-pseudo-drives
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af4e451600
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9737650fae
@ -1,6 +1,8 @@
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/*
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cc -g -c burn_wrap.c
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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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@ -15,6 +17,7 @@
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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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@ -29,15 +32,13 @@ 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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int ret;
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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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reurn(1);
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return(1);
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}
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@ -84,13 +85,10 @@ int isoburn_drive_scan_and_grab(struct burn_drive_info *drive_infos[],
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if(ret==0) {
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if(stat(adr,&stbuf)!=-1) {
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if(S_ISREG(stbuf.st_mode) || S_ISBLK(stbuf.st_mode)) {
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return(0);
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/* >>> would be acceptable in future */;
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/* >>> create null-drive */;
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/* >>> set emulation to standard i/o */;
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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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@ -107,7 +105,7 @@ int isoburn_drive_scan_and_grab(struct burn_drive_info *drive_infos[],
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ret= burn_drive_scan_and_grab(drive_infos, adr, load);
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if(ret<=0)
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goto ex;
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ret= isoburn_examine_media(&o, (*drive_infos)[0].drive, 0);
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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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}
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@ -128,7 +126,7 @@ int isoburn_drive_grab(struct burn_drive *drive, int load)
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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_examine_media(&o, drive, 0);
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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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@ -187,16 +185,14 @@ void isoburn_disc_erase(struct burn_drive *drive, int fast)
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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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/* >>> influence wrote_well reply or have wrote_well wrapper ? */
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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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/* >>> influence wrote_well reply or have wrote_well wrapper ? */
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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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@ -239,29 +235,103 @@ int isoburn_disc_track_lba_nwa(struct burn_drive *d,
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}
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int isoburn_disc_write(struct burn_write_opts *opts, struct burn_disc *disc)
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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;
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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(0);
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if(o->emulation_mode==2) {
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return(0);
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/* >>> implement an asynchronous standard i/o writer */;
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}
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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, no_drive_release= 0;
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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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@ -17,7 +17,10 @@
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include <unistd.h>
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#include "../libisofs/libisofs.h"
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#include "../libburn/libburn.h"
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#include "isoburn.h"
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@ -46,6 +49,12 @@ 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->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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@ -84,6 +93,13 @@ int isoburn_destroy(struct isoburn **objpt, int flag)
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/* >>> end mutex */
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#ifdef NIX
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if(o->stdio_path!=NULL)
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free((char *) o->stdio_path);
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if(o->stdio_fd!=-1)
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close(o->stdio_fd);
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#endif
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if(o->drive!=NULL)
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burn_drive_release(o->drive, 0);
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isoburn_free_rwopts(o);
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@ -120,7 +136,8 @@ int isoburn_get_emulation_mode(struct isoburn *o, int *pt, int flag)
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}
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int isoburn_get_target_volset(struct isoburn *o, struct volset **pt, int flag)
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int isoburn_get_target_volset(struct isoburn *o, struct iso_volset **pt,
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int flag)
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{
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*pt= o->target_volset;
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return(1);
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@ -150,7 +167,7 @@ int isoburn_link(struct isoburn *o, struct isoburn *link, int flag)
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/* >>> mutex */
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if(isoburn_list_start==NULL ||
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isoburn_list_start==link && (flag&1))
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(isoburn_list_start==link && (flag&1)))
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isoburn_list_start= o;
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if(o->prev!=NULL)
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o->prev->next= o->next;
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@ -10,8 +10,6 @@
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#define Isoburn_includeD
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/* <<< as long as no inclusion of libisofs.h */
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struct volset;
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/* for uint8_t */
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#include <stdint.h>
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@ -32,7 +30,7 @@ struct isoburn {
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/* Although rarely used, libburn can operate on several */
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/* drives simultaneously. */
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/* >>> I propose to design isoburn as chain link of a list with its
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/* >>> I propose to design isoburn as chain link of a list with its */
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/* >>> start stored globally. */
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struct isoburn *prev;
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struct isoburn *next;
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@ -46,6 +44,15 @@ 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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@ -57,7 +64,7 @@ struct isoburn {
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uint8_t target_iso_head[65536];
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/* The filesystem structure of the old image from media. */
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struct volset *target_volset;
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struct iso_volset *target_volset;
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/* The output options of the current run of libisofs. */
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/* Element .overwrite eventually points to a buffered new head */
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@ -77,7 +84,8 @@ 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, struct volset **pt, int flag);
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int isoburn_get_target_volset(struct isoburn *o, struct iso_volset **pt,
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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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