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/*
* cdrom_id - determines the capabilities of cdrom drives
*
* Copyright (C) 2005 Greg Kroah-Hartman <gregkh@suse.de>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation version 2 of the License.
*
* Framework based on ata_id which is:
* Copyright (C) 2005 Kay Sievers <kay.sievers@vrfy.org>
*
*/
#ifndef _GNU_SOURCE
#define _GNU_SOURCE 1
#endif
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <ctype.h>
#include <errno.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <linux/types.h>
#include "../../logging.h"
#include "../../udev_utils.h"
/*
* Taken from the cdrom.h kernel include file.
* Included here as some distros don't have an updated version
* with all of the DVD flags. So we just include our own, aren't
* we so nice...
*/
#define CDROM_GET_CAPABILITY 0x5331 /* get capabilities */
/* capability flags used with the uniform CD-ROM driver */
#define CDC_CLOSE_TRAY 0x1 /* caddy systems _can't_ close */
#define CDC_OPEN_TRAY 0x2 /* but _can_ eject. */
#define CDC_LOCK 0x4 /* disable manual eject */
#define CDC_SELECT_SPEED 0x8 /* programmable speed */
#define CDC_SELECT_DISC 0x10 /* select disc from juke-box */
#define CDC_MULTI_SESSION 0x20 /* read sessions>1 */
#define CDC_MCN 0x40 /* Medium Catalog Number */
#define CDC_MEDIA_CHANGED 0x80 /* media changed */
#define CDC_PLAY_AUDIO 0x100 /* audio functions */
#define CDC_RESET 0x200 /* hard reset device */
#define CDC_IOCTLS 0x400 /* driver has non-standard ioctls */
#define CDC_DRIVE_STATUS 0x800 /* driver implements drive status */
#define CDC_GENERIC_PACKET 0x1000 /* driver implements generic packets */
#define CDC_CD_R 0x2000 /* drive is a CD-R */
#define CDC_CD_RW 0x4000 /* drive is a CD-RW */
#define CDC_DVD 0x8000 /* drive is a DVD */
#define CDC_DVD_R 0x10000 /* drive can write DVD-R */
#define CDC_DVD_RAM 0x20000 /* drive can write DVD-RAM */
#define CDC_MO_DRIVE 0x40000 /* drive is an MO device */
#define CDC_MRW 0x80000 /* drive can read MRW */
#define CDC_MRW_W 0x100000 /* drive can write MRW */
#define CDC_RAM 0x200000 /* ok to open for WRITE */
#ifdef USE_LOG
void log_message(int priority, const char *format, ...)
{
va_list args;
static int udev_log = -1;
if (udev_log == -1) {
const char *value;
value = getenv("UDEV_LOG");
if (value)
udev_log = log_priority(value);
else
udev_log = LOG_ERR;
}
if (priority > udev_log)
return;
va_start(args, format);
vsyslog(priority, format, args);
va_end(args);
}
#endif
int main(int argc, char *argv[])
{
const char *node = NULL;
int i;
int export = 0;
int fd;
int rc = 0;
int result;
logging_init("cdrom_id");
for (i = 1 ; i < argc; i++) {
char *arg = argv[i];
if (strcmp(arg, "--export") == 0) {
export = 1;
} else
node = arg;
}
if (!node) {
info("no node specified");
rc = 1;
goto exit;
}
fd = open(node, O_RDONLY|O_NONBLOCK);
if (fd < 0) {
info("unable to open '%s'", node);
rc = 1;
goto exit;
}
result = ioctl(fd, CDROM_GET_CAPABILITY, NULL);
if (result < 0) {
info("CDROM_GET_CAPABILITY failed for '%s'", node);
rc = 3;
goto close;
}
printf("ID_CDROM=1\n");
if (result & CDC_CD_R)
printf("ID_CDROM_CD_R=1\n");
if (result & CDC_CD_RW)
printf("ID_CDROM_CD_RW=1\n");
if (result & CDC_DVD)
printf("ID_CDROM_DVD=1\n");
if (result & CDC_DVD_R)
printf("ID_CDROM_DVD_R=1\n");
if (result & CDC_DVD_RAM)
printf("ID_CDROM_DVD_RAM=1\n");
if (result & CDC_MRW)
printf("ID_CDROM_MRW=1\n");
if (result & CDC_MRW_W)
printf("ID_CDROM_MRW_W=1\n");
if (result & CDC_RAM)
printf("ID_CDROM_RAM=1\n");
close:
close(fd);
exit:
logging_close();
return rc;
}
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