mirror of
https://github.com/systemd/systemd-stable.git
synced 2024-11-01 00:51:08 +03:00
1aa1e24848
We never used any of the libsysfs convenience features. Here we replace it completely with 300 lines of code, which are much simpler and a bit faster cause udev(d) does not open any syfs file for a simple event which does not need any parent device information. Signed-off-by: Kay Sievers <kay.sievers@suse.de>
153 lines
3.6 KiB
C
153 lines
3.6 KiB
C
/*
|
|
* 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.
|
|
*
|
|
*/
|
|
|
|
#ifndef _GNU_SOURCE
|
|
#define _GNU_SOURCE 1
|
|
#endif
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
#include <ctype.h>
|
|
#include <string.h>
|
|
#include <errno.h>
|
|
#include <sys/ioctl.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <linux/types.h>
|
|
|
|
#include "../../udev.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;
|
|
}
|