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Introduced API functions burn_drive_scan_and_grab() burn_drive_get_adr()

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This commit is contained in:
Thomas Schmitt 2006-08-24 13:30:21 +00:00
parent 1f59bcb6b2
commit 2a160a50f3
2 changed files with 86 additions and 2 deletions
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39
trunk/libburn/drive.c
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@ -421,3 +421,42 @@ int burn_drive_is_open(struct burn_drive *d)
return 0;
return 1;
}
/* ts A60823 */
/** Aquire a drive with known persistent address.
*/
int burn_drive_scan_and_grab(struct burn_drive_info *drives[], char* adr,
int load)
{
unsigned int n_drives;
int ret;
burn_drive_clear_whitelist();
burn_drive_add_whitelist(adr);
while (!burn_drive_scan(drives, &n_drives));
if (n_drives <= 0)
return 0;
if (load) {
/* RIP-14.5 + LITE-ON 48125S produce a false status
if tray was unloaded */
/* Therefore the first grab is just for loading */
ret= burn_drive_grab(drives[0]->drive, 1);
if (ret != 1)
return -1;
burn_drive_release(drives[0]->drive,0);
}
ret = burn_drive_grab(drives[0]->drive, load);
if (ret != 1)
return -1;
return 1;
}
/* ts A60823 */
/** Inquire the persistent address of the given drive. */
int burn_drive_get_adr(struct burn_drive_info *drive, char adr[])
{
assert(strlen(drive->location) < BURN_DRIVE_ADR_LEN);
strcpy(adr,drive->location);
return 1;
}

45
trunk/libburn/libburn.h
View File

@ -469,6 +469,38 @@ struct burn_message* burn_get_message(void);
/** Frees a burn_message structure */
void burn_message_free(struct burn_message *msg);
/* ts A60823 */
/** Aquire a drive with known persistent address.This is the sysadmin friendly
way to open one drive and to leave all others untouched. It bundles
the following API calls to form a non-obtrusive way to use libburn:
burn_drive_add_whitelist() , burn_drive_scan() , burn_drive_grab()
You are *strongly urged* to use this call whenever you know the drive
address in advance.
If not, then you have to use directly above calls. In that case, you are
*strongly urged* to end the libburn session as soon as possible,
including a call to burn_finish(). This is to release any unintended
drive which might get exclusively occupied and not released by
burn_drive_scan().
You may start a new libburn session and should then use the function
described here with an address obtained after burn_drive_scan() via
a call of burn_drive_get_adr(&(drives[driveno]), adr) .
@param drives On success returns a one element array with the drive
(cdrom/burner). Thus use with driveno 0 only. On failure
the array has no valid elements at all.
The returned array should be freed via burn_drive_info_free()
when it is no longer needed, and before calling a scan
function again.
This is a result from call burn_drive_scan(). See there.
Use with driveno 0 only.
@param adr The persistent address of the desired drive. Either obtained
by burn_drive_get_adr() or guessed skillfully by application
resp. its user.
@param load Nonzero to make the drive attempt to load a disc (close its
tray door, etc).
@return 1 = success , 0 = drive not found , -1 = other error
*/
int burn_drive_scan_and_grab(struct burn_drive_info *drives[], char* adr,
int load);
/* ts A51221 */
/** Maximum number of particularly permissible drive addresses */
@ -495,11 +527,24 @@ void burn_drive_clear_whitelist(void);
*/
int burn_drive_scan(struct burn_drive_info *drives[],
unsigned int *n_drives);
/** Frees a burn_drive_info array returned by burn_drive_scan
@param info The array to free
*/
void burn_drive_info_free(struct burn_drive_info *info);
/* ts A60823 */
/** Maximum length+1 to expect with a persistent drive address string */
#define BURN_DRIVE_ADR_LEN 1024
/** Inquire the persistent address of the given drive.
@param drive The drive to inquire. Usually some &(drives[driveno])
@param adr An application provided array of at least BURN_DRIVE_ADR_LEN
characters size. The persistent address gets copied to it.
*/
int burn_drive_get_adr(struct burn_drive_info *drive, char adr[]);
/** Grab a drive. This must be done before the drive can be used (for reading,
writing, etc). It may be neccesary to call this function more than once
to grab a drive. See burn_grab for details.