--- Begin Message ---
- To: Debian Bug Tracking System <submit@bugs.debian.org>
- Subject: linux: CDROM_LOCKDOOR does not lock the door
- From: Thorsten Glaser <tg@mirbsd.de>
- Date: Thu, 26 Dec 2024 15:10:31 +0100
- Message-id: <173522223166.20830.12862318434446519262.reportbug@x61p.mirbsd.org>
Package: src:linux
Version: 5.10.226-1
Severity: normal
X-Debbugs-Cc: tg@mirbsd.de
I wrote a program to run…
ioctl(i, CDROM_LOCKDOOR, 1)
… on /dev/cdrom aka /dev/sr0, and it executes correctly.
The program then holds the file descriptor open until SIGTERM.
However, the only effect of this is that /dev/cdrom and the other
/dev/cd-something symlink I cannot remember go away. The CD-ROM
drive is not locked.
This is on a Thinkpad X61, CD-ROM drive in docking station.
Not sure whether the model just cannot do this or udev is interfering
or something else is going on, but, for comparison, on a Thinkpad X40
(i.e. a pretty similar setup) the equivalent ioctl on MirBSD can indeed
successfully lock the drive, so at least it’s not a systematic problem
with Thinkpads.
I’m attaching a first draft (I didn’t have the tuits to fully port
cdio(1) with all of its features at the moment).
-- Package-specific info:
** Version:
Linux version 5.10.0-33-amd64 (debian-kernel@lists.debian.org) (gcc-10 (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2) #1 SMP Debian 5.10.226-1 (2024-10-03)
** Command line:
BOOT_IMAGE=/vmlinuz-5.10.0-33-amd64 root=/dev/mapper/vg--x61p-lv--root ro net.ifnames=0 rootflags=defaults,relatime,lazytime,barrier=1,data=ordered,auto_da_alloc vga=792 TZ=:Europe/Berlin
** Tainted: OE (12288)
* externally-built ("out-of-tree") module was loaded
* unsigned module was loaded
** Kernel log:
Unable to read kernel log; any relevant messages should be attached
** Model information
sys_vendor: LENOVO
product_name: 7674D67
product_version: ThinkPad X61
chassis_vendor: LENOVO
chassis_version: Not Available
bios_vendor: LENOVO
bios_version: 7NET30WW (1.11 )
board_vendor: LENOVO
board_name: 7674D67
board_version: Not Available
** Loaded modules:
snd_seq_dummy
snd_seq
snd_seq_device
fuse
cpufreq_ondemand
ctr
ccm
binfmt_misc
cpufreq_powersave
tp_smapi(OE)
thinkpad_ec(OE)
msr
snd_hda_codec_analog
snd_hda_codec_generic
iwl4965
iwlegacy
snd_hda_intel
mac80211
i915
snd_intel_dspcfg
coretemp
soundwire_intel
pcmcia
soundwire_generic_allocation
snd_soc_core
snd_compress
kvm_intel
soundwire_cadence
snd_hda_codec
cfg80211
snd_hda_core
drm_kms_helper
cec
kvm
snd_hwdep
ppdev
drm
soundwire_bus
iTCO_wdt
intel_pmc_bxt
yenta_socket
irqbypass
evdev
thinkpad_acpi
pcmcia_rsrc
snd_pcm
iTCO_vendor_support
pcmcia_core
watchdog
serio_raw
libarc4
pcspkr
i2c_algo_bit
nvram
sg
snd_timer
ledtrig_audio
snd
soundcore
rfkill
parport_pc
ac
parport
button
acpi_cpufreq
ecb
aes_generic
libaes
crypto_simd
cryptd
glue_helper
xts
dm_crypt
dm_mod
ext4
crc16
mbcache
jbd2
crc32c_generic
mmc_block
sd_mod
t10_pi
crc_t10dif
crct10dif_generic
sr_mod
cdrom
crct10dif_common
sdhci_pci
ata_generic
cqhci
e1000e
ahci
ehci_pci
uhci_hcd
ehci_hcd
libahci
sdhci
i2c_i801
ptp
ata_piix
libata
psmouse
usbcore
pps_core
scsi_mod
mmc_core
lpc_ich
i2c_smbus
usb_common
battery
video
** PCI devices:
not available
** USB devices:
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 003: ID 17ef:1000 Lenovo ThinkPad X6 UltraBase
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 002: ID 0483:2016 STMicroelectronics Fingerprint Reader
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
-- System Information:
Debian Release: 11.11
APT prefers oldstable-updates
APT policy: (500, 'oldstable-updates'), (500, 'oldstable-security'), (500, 'oldstable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386
Kernel: Linux 5.10.0-33-amd64 (SMP w/2 CPU threads)
Kernel taint flags: TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=C.UTF-8, LC_CTYPE=C.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /bin/lksh
Init: sysvinit (via /sbin/init)
Versions of packages linux-image-5.10.0-33-amd64 depends on:
ii initramfs-tools [linux-initramfs-tool] 0.140
ii kmod 28-1
ii linux-base 4.6
Versions of packages linux-image-5.10.0-33-amd64 recommends:
pn apparmor <none>
ii firmware-linux-free 20200122-1
Versions of packages linux-image-5.10.0-33-amd64 suggests:
pn debian-kernel-handbook <none>
ii grub-pc 2.06-3~deb11u6
pn linux-doc-5.10 <none>
Versions of packages linux-image-5.10.0-33-amd64 is related to:
pn firmware-amd-graphics <none>
pn firmware-atheros <none>
pn firmware-bnx2 <none>
pn firmware-bnx2x <none>
pn firmware-brcm80211 <none>
pn firmware-cavium <none>
pn firmware-intel-sound <none>
pn firmware-intelwimax <none>
pn firmware-ipw2x00 <none>
pn firmware-ivtv <none>
ii firmware-iwlwifi 20210315-3
pn firmware-libertas <none>
pn firmware-linux-nonfree <none>
pn firmware-misc-nonfree <none>
pn firmware-myricom <none>
pn firmware-netxen <none>
pn firmware-qlogic <none>
pn firmware-realtek <none>
pn firmware-samsung <none>
pn firmware-siano <none>
pn firmware-ti-connectivity <none>
pn xen-hypervisor <none>
-- no debconf information
/* SPDX-License-Identifier: MirOS OR CC0-1.0 */
/* © 2024 mirabilos Ⓕ MirBSD or CC0 */
#include <sys/types.h>
#include <sys/ioctl.h>
#include <linux/cdrom.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <string.h>
#include <unistd.h>
#if 0
#define DEFAULT_CDROM "/dev/cdrom"
#else
/* udev, on 'cdio lock', drops /dev/cd* entries; gotta love progress! */
#define DEFAULT_CDROM "/dev/sr0"
#endif
enum command {
CMD_CLOSE,
CMD_EJECT,
CMD_LOCK,
};
static volatile sig_atomic_t keeprunning;
/* pointer, not array */
static const char *dvname = DEFAULT_CDROM;
static void initsigs(void);
static void usage(void) __attribute__((__noreturn__));
int
main(int argc, char *argv[])
{
int i;
enum command cmd;
while ((i = getopt(argc, argv, "d:f:sv")) != -1)
switch (i) {
case 'd':
case 's':
case 'v':
/* ignored, for MirBSD cdio(1) compatibility */
break;
case 'f':
dvname = optarg;
break;
default:
usage();
}
argc -= optind;
argv += optind;
if (argc != 1) /* for now */
usage();
if (!strcmp(*argv, "close"))
cmd = CMD_CLOSE;
else if (!strcmp(*argv, "eject"))
cmd = CMD_EJECT;
else if (!strcmp(*argv, "lock"))
cmd = CMD_LOCK;
else
usage();
/* O_NONBLOCK per <linux/cdrom.h> instructions */
if ((i = open(dvname, O_RDONLY | O_NONBLOCK)) == -1)
err(1, "open %s", dvname);
#define tryioctl(name, ...) do { \
/* as unknown error indicator */ \
errno = ENOPROTOOPT; \
if (ioctl(i, name, ## __VA_ARGS__) < 0) \
err(1, "ioctl(%s, %s)", dvname, #name); \
} while (/* CONSTCOND */ 0)
switch (cmd) {
case CMD_CLOSE:
if (ioctl(i, CDROMCLOSETRAY, 0) < 0)
err(1, "ioctl(%s, %s)", dvname, "CDROMCLOSETRAY");
break;
case CMD_EJECT:
/* try unlocking first */
if (ioctl(i, CDROM_LOCKDOOR, 0) < 0)
warn("ioctl(%s, %s)", dvname, "CDROM_LOCKDOOR");
errno = ENOPROTOOPT;
if (ioctl(i, CDROMEJECT, 0) < 0)
err(1, "ioctl(%s, %s)", dvname, "CDROMEJECT");
break;
case CMD_LOCK:
if (ioctl(i, CDROM_LOCKDOOR, 1) < 0)
err(1, "ioctl(%s, %s)", dvname, "CDROM_LOCKDOOR");
/* assert(!is_interactive); */
initsigs();
printf("I: locked; keeping program running until aborted...");
fflush(NULL);
keeprunning = 1;
while (keeprunning)
pause();
printf("\nI: signal caught, exiting\n");
break;
}
close(i);
return (0);
}
static void
usage(void)
{
fprintf(stderr, "E: usage: cdio [-f %s] <command>\n", DEFAULT_CDROM);
fprintf(stderr, "N: commands are: close eject lock\n");
exit(1);
}
static void
handle_sigterm(int signo __attribute__((__unused__)))
{
keeprunning = 0;
}
static void
initsigs(void)
{
struct sigaction sa;
memset(&sa, '\0', sizeof(sa));
sa.sa_handler = &handle_sigterm;
sigemptyset(&sa.sa_mask);
sa.sa_flags = SA_RESETHAND;
if (sigaction(SIGTERM, &sa, NULL))
warn("could not install SIGTERM handler");
}
--- End Message ---