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New API calls burn_drive_grab_dummy(), burn_drive_get_drive_role()

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This commit is contained in:
Thomas Schmitt
2007-09-04 22:50:04 +00:00
parent d4eed9925d
commit 1c3a79629c
10 changed files with 591 additions and 73 deletions
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94
libburn/trunk/libburn/read.c
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@ -12,6 +12,9 @@
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <fcntl.h>
#include <errno.h>
#include "sector.h"
#include "libburn.h"
#include "drive.h"
@ -288,12 +291,37 @@ static void flipq(unsigned char *sub)
*/
/* ts A70904 */
/** @param flag bit=be silent on data shortage */
int burn_stdio_read(int fd, char *buf, int bufsize, struct burn_drive *d,
int flag)
{
int todo, count = 0;
for(todo = bufsize; todo > 0; ) {
count = read(fd, buf + (bufsize - todo), todo);
if(count <= 0)
break;
todo -= count;
}
if(todo > 0 && !(flag & 1)) {
libdax_msgs_submit(libdax_messenger, d->global_index,
0x0002014a,
LIBDAX_MSGS_SEV_SORRY, LIBDAX_MSGS_PRIO_HIGH,
"Cannot read desired amount of data", errno, 0);
}
if (count < 0)
return -1;
return (bufsize - todo);
}
/* ts A70812 : API function */
int burn_read_data(struct burn_drive *d, off_t byte_address,
char data[], off_t data_size, off_t *data_count, int flag)
{
int alignment = 2048, start, upto, chunksize = 1, err, cpy_size, i;
int sose_mem = 0;
int sose_mem = 0, fd = -1, ret;
char msg[81], *wpt;
struct buffer buf;
@ -307,6 +335,13 @@ int burn_read_data(struct burn_drive *d, off_t byte_address,
"Drive is not grabbed on random access write", 0, 0);
return 0;
}
if (d->drive_role == 0) {
libdax_msgs_submit(libdax_messenger, d->global_index,
0x00020146,
LIBDAX_MSGS_SEV_FATAL, LIBDAX_MSGS_PRIO_HIGH,
"Drive is a virtual placeholder (null-drive)", 0, 0);
return 0;
}
if ((byte_address % alignment) != 0) {
sprintf(msg,
"Read start address not properly aligned (%d bytes)",
@ -325,6 +360,33 @@ int burn_read_data(struct burn_drive *d, off_t byte_address,
"Drive is busy on attempt to read data", 0, 0);
return 0;
}
if (d->drive_role != 1) {
/* <<< We need _LARGEFILE64_SOURCE defined by the build system.
*/
#ifndef O_LARGEFILE
#define O_LARGEFILE 0
#endif
fd = open(d->devname, O_RDONLY | O_LARGEFILE);
if (fd == -1) {
libdax_msgs_submit(libdax_messenger, d->global_index,
0x00020005,
LIBDAX_MSGS_SEV_SORRY, LIBDAX_MSGS_PRIO_HIGH,
"Failed to open device (a pseudo-drive)",
errno, 0);
ret = 0; goto ex;
}
if (lseek(fd, byte_address, SEEK_SET) == -1) {
libdax_msgs_submit(libdax_messenger, d->global_index,
0x00020147,
LIBDAX_MSGS_SEV_SORRY, LIBDAX_MSGS_PRIO_HIGH,
"Cannot address start byte", errno, 0);
ret = 0; goto ex;
}
}
d->busy = BURN_DRIVE_READING_SYNC;
d->buffer = &buf;
@ -342,7 +404,14 @@ int burn_read_data(struct burn_drive *d, off_t byte_address,
cpy_size = data_size - *data_count;
if (flag & 2)
d->silent_on_scsi_error = 1;
err = d->read_10(d, start, chunksize, d->buffer);
if (d->drive_role == 1) {
err = d->read_10(d, start, chunksize, d->buffer);
} else {
ret = burn_stdio_read(fd, (char *) d->buffer->data,
cpy_size, d, 0);
if (ret <= 0)
err = BE_CANCELLED;
}
if (flag & 2)
d->silent_on_scsi_error = sose_mem;
if (err == BE_CANCELLED) {
@ -350,7 +419,16 @@ int burn_read_data(struct burn_drive *d, off_t byte_address,
for (i = 0; i < chunksize - 1; i++) {
if (flag & 2)
d->silent_on_scsi_error = 1;
err = d->read_10(d, start + i, 1, d->buffer);
if (d->drive_role == 1) {
err = d->read_10(d, start + i, 1,
d->buffer);
} else {
ret = burn_stdio_read(fd,
(char *) d->buffer->data,
2048, d, 1);
if (ret <= 0)
err = BE_CANCELLED;
}
if (flag & 2)
d->silent_on_scsi_error = sose_mem;
if (err == BE_CANCELLED)
@ -359,16 +437,18 @@ int burn_read_data(struct burn_drive *d, off_t byte_address,
wpt += 2048;
*data_count += 2048;
}
d->buffer = NULL;
d->busy = BURN_DRIVE_IDLE;
return 0;
ret = 0; goto ex;
}
memcpy(wpt, d->buffer->data, cpy_size);
wpt += cpy_size;
*data_count += cpy_size;
}
ret = 1;
ex:;
if (fd != -1)
close(fd);
d->buffer = NULL;
d->busy = BURN_DRIVE_IDLE;
return 1;
return ret;
}