About Me
Michael Zucchi
B.E. (Comp. Sys. Eng.)
also known as Zed
to his mates & enemies!
< notzed at gmail >
< fosstodon.org/@notzed >
Well that was shit
It ended up hitting 46.6 - yep the hottest day on record - just as
I left to hit the town. The town was dead. I spent most of the
time drinking alone outside on the street although I used splashes
of water to keep me cooler than I would have been otherwise.
Even the cockroaches were succumbing to the heat - well at least
one expired while I was sitting there! So much for the nuclear
apocalipse.
As a health exercise it was a complete failure and probably worse
than just staying home.
At least it's supposed to cool down tomorrow for a few days
although at 23:00 it's still about 35 so it's going to be a
hot-arse night.
Hell on Earth
Welcome to Adelaide, South Australia.
So the mercury just hit 46.6C, which would make it hottest day on
record if that sticks as an official reading. Thats a prelimary
number from the BOM and i'm not sure which site they use as the
official Adelaide number (it was 47.7 in Kent Town). Not even 4pm
yet so it might get higher although some clouds are rolling in and
there's some `breeze' (more like a fan-forced oven).
Probably not the best day for it but I have to get out of the
house for health reasons so time to go see what a burning city
looks like first hand. Going to be a warm ride in.
libeze - C utility library
This is announcing a new small project
- libeze.
It is a small collection of C utilities as a static link library.
Goals:
- Aim for best implementation of an algorithm;
- Clean readable source;
- Small source size;
- Small code size;
- Consistent api and features where it makes sense;
- Low level and highly re-usable building blocks where it makes sense.
Rather than copy the rest of it's current home page just go there
and read it. There is much more in the README and source.
It's an offshoot (read: I got very distracted) of the mele music
player i've been working on as well as some previous code
from ezesdk.
For the PlayerZ
Well i've been stuck in the house for various reasons so i've been
doing a lot of solid work on the audio player software for the
mele box.
It's not feature complete but it all works:
Removable drives are automatically detected and mounted or
unmounted if they contain filesystems. They are mounted read-only
via their UUID. This is implemented only using kernel calls and
libblkid.
Detected drives are scanned and media files are indexed
into a persistent database. Arbitrary trees on the filesystem can
also be indexed.
Multiple secondary indices are genereated including title
and author.
Deleted, changed, or added files are updated properly when
they are scanned.
Various relational database constraints are implemented -
albeit manually.
The music player supports all the basic features like
pause, volume, mute, fast-forward, rewind, next and previous
file.
It can be controlled via the Mele airmouse.
It's somewhat robust to media being removed while in use.
I've already hit a bug in the kernel so it may be the limiting
factor here.
Scalable, space, and time efficient algorithms are used
throughout.
It's about 2KLOC of plain C and a couple of libraries.
It is already or is very close to 'valgrind clean'.
I'm using posix message queues for communicating between the
processes with a simple C struct serialisation mechanism. I'm not
using threads as yet, the player just runs as a single thread.
This means it can block while reading from libavformat but it
greatly simplifies the player logic.
At the moment i'm just running it on my 'workstation' so I don't
know how much work - if any - will be required to get it going on
the mele, or how it will handle the processes and so on. For
example if the disk indexer will overload the cpu or i/o.
Anyway here is a high-level diagram of the processes and various
bits that make it up. Sorry it's a bit shit, but well, openoffice
draw is a fucking headache to work with.
For it to be feature complete there isn't much left. Some sort of
playlist mechanism and/or other ways to navigate the files beyond
disk+file-path order. Shuffle should be easy. Network streams
would be nice.
With no user interface beyond 2 leds (and given they're in the
same hole that just means 2 colours) it can't get too complicated
without resorting to an additional service for external
maniplation. But that is of course possible.
The things I want to look at are playlists and other ways to
navigate the files (other than file-path order), and network
streams.
Bored as Fuck
Haven't left the house for a full week at this point. I was sick
for a few days but now i'm just miserable for other reasons. This
stuff is keeping me well occupied but yeah it's kind of pointless.
Even my knees fucking hurt.
I'm wondering whether i should just go back to work early since
there's still a couple of weeks before I would otherwise. I don't
think I could face it though.
I'm also a bit pissed off that I think I drowned and killed a
chilli plant i've been growing for weeks just as it started to
kick into gear. We had a couple of hot days and i overwatered it
i think. Actually not much is growing very well this year and I
can't seem to water it properly either. Too much or too little.
Water is so expensive here.
Oh, I also wasted a couple of hours playing
with yacy. The idea of
decentralised internet services certainly appeals. But it was
just slow and provided almost no relevant results to any search I
tried - it just didn't work for me. Solr/Lucene just does a
weighted sub-string index which isn't very sophisticated. It's
also configured for some big server so running it on this little
vps was difficult even after fighting with the complex
configuration system.
I'm not eating much at least so maybe i can lose some of the
weight I keep putting on.
Media Queries
I made a small change to the HTML and CSS to try to render a bit
better on phones. Even though the text is all resizeable and
reflowable they rendered at some massive resolution and then
scaled down - making the text unredable and non-reflowable. Sigh.
Anyway, first I added:
<meta name='viewport' content='width=device-width, initial-scale=1'>
But this made the text too big and interfered with the table-like
layout. I tried using a width of 800 which sort of worked but
wasn't very readable either.
So I added a media query and adjusted some of the main sections
and the borders and so on. It's just a quick and dirty but it
works better than it did. I've only tested on one phone so others
may not have changed.
/* bloody phones */
@media (max-width: 480px) {
div#site-menu, .tag-menu {
float: none;
width: 100%;
}
.post-footer, .post, .post-header {
margin-right: 1em;
}
}
On the other hand i'm lucky to get one visitor per week (lots of
crawlers, and plenty of hacking attempts) so who really cares eh?
Monitoring Removable USB Drives
I've been looking into writing some media player software and one
function I want is to be able to detect inserted drives and do
things with them.
inotify
First I looked at using inotify and just monitoring /dev. This is
quite simple; you get IN_CREATE and IN_DELETE events when the
directories are created or otherwise, and then you can do what is
necessary.
Then came the problem of the doing bit - well you want to mount
drives. You can use usbmount or udevd but at this point I was
trying for an in-memory solution and I couldn't work out how to
find out when they were mounted without having another script run.
libblkid & mount(2)
blkid is used by the usbmount script to determine if the device is
a mountable partition; so I looked into libblkdid to do the same
from code. It's a bit of a quirky api, and is poorly documented
but not terribly difficult to use for what I want. The api is
designed for implementing glue between kernel and scripts. The
variables you get are again, pretty much undocumented as far as i
can gather so it's just a process of run it and see what looks
useful.
But using it isn't hard. Basically when a /dev/sd* appears I
perform a probe and if it has the right variables set I call
mount. I only want read-only access so that simplifies the mount
options considerably.
Here's a partial prototype example of the inotify handler and
mounting process. This is basically what usbmount does but it
ignores any options in fstab and so forth.
static int mount_add(const char *name, blkid_probe p) {
int idx = mount_alloc();
if (idx >= 0) {
int res;
const char *type;
size_t type_size;
printf("checking mount %s\n", name);
if (blkid_probe_lookup_value(p, "TYPE", &type, &type_size) == 0) {
char point[(strlen("/var/run/usb-00") + 1)];
sprintf(point, "/var/run/usb-%02d", idx);
res = mkdir(point, 0777);
res = mount(name, point, type, MS_NOEXEC | MS_RDONLY | MS_NOSUID, NULL);
if (res != 0) {
perror("mount");
return -1;
}
printf("mounted: %s <- %s\n", point, name);
mounted[idx].name = strdup(name);
mounted[idx].point = strdup(point);
if (blkid_probe_lookup_value(p, "UUID", &type, &type_size) == 0)
mounted[idx].uuid = strdup(type);
} else {
idx = -1;
}
}
return idx;
}
static int mount_remove(const char *name) {
int idx = mount_index(name);
if (idx >= 0) {
int res = umount2(mounted[idx].point, MNT_DETACH);
if (res != 0)
perror("umount2");
else
printf("unmounted: %s <- %s\n", mounted[idx].point, mounted[idx].name);
free(mounted[idx].name);
free(mounted[idx].point);
free(mounted[idx].uuid);
memset(&mounted[idx], 0, sizeof(struct mounted));
}
return idx;
}
static void
handle_events(int fd, int wd)
{
char buf[4096] __attribute__ ((aligned(__alignof__(struct inotify_event))));
int i;
ssize_t len;
char *ptr;
for (;;) {
len = read(fd, buf, sizeof buf);
if (len == -1 && errno != EAGAIN) {
perror("read");
exit(EXIT_FAILURE);
}
if (len <= 0)
break;
for (ptr = buf; ptr < buf + len;) {
const struct inotify_event *event;
event = (const struct inotify_event *) ptr;
if (event->len && strncmp(event->name, "sd", 2) == 0) {
char name[(event->len + 1 + strlen("/dev/"))];
sprintf(name, "/dev/%s", event->name);
if (event->mask & IN_CREATE) {
blkid_probe p = blkid_new_probe_from_filename(name);
int rc;
blkid_probe_enable_partitions(p, 0);
blkid_probe_enable_superblocks(p, 1);
rc = blkid_do_safeprobe(p);
int idx = mount_add(name, p);
if (idx >= 0) {
// do something with added mount
}
blkid_free_probe(p);
}
if (event->mask & IN_DELETE) {
int idx = mount_index(name);
if (idx >= 0) {
// do something with removed mount
}
}
}
ptr += sizeof(struct inotify_event) + event->len;
}
}
}
udevd, NETLINK_KOBJECT_UEVENT
But I was curious - just how are the dev entries created? I
thought it must be udevd or something. The only articles or
documentation I could find were unclear on the matter.
So first, NETLINK_KOBJECT_UEVENT, this unpleasantly named
'network' protocol is used these days to monitor kernel activities
like usb hotplugging. So I took a small example and started
dumping out what I got.
The documentation and examples talk about using a 'struct
nmlsghdr' as the datagram payload, but this is in error. You just
get the payload directly. And the payload appears to be list of
NUL terminated strings; which surprise are just environment
variable declarations (i'm noticing a trend here).
Anyway, here's a complete example which dumps out the messages.
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <linux/netlink.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
int main(int argc, char **argv) {
int s = socket(AF_NETLINK, SOCK_DGRAM, NETLINK_KOBJECT_UEVENT);
struct sockaddr_nl addr = {
.nl_family = AF_NETLINK,
.nl_pid = getpid(),
.nl_groups = ~0
};
int res;
char data[8192];
struct msghdr msg;
struct iovec iov;
bind(s, (void *)&addr, sizeof(addr));
iov.iov_base = data;
iov.iov_len = 8192;
msg.msg_name = (void *)&(addr);
msg.msg_namelen = sizeof(addr);
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
while ((res = recvmsg(s, &msg, 0)) >= 0) {
if (strcmp(data, "libudev") != 0) {
unsigned char *x = data, *e = data+res;
while (x < e) {
printf(" %s\n", x);
x += strlen(x) + 1;
}
printf("\n");
} else {
for (int i=0;i<res;i+=16) {
for (int j=i;j < i+16;j++)
printf(j < res ? " %02x" : " ", data[j]);
printf(" ");
for (int j=i;j < i+16;j++)
putchar(j < res ? (isprint(data[j]) ? data[j] : '.') : ' ');
printf("\n");
}
printf("\n");
}
}
return 0;
}
The libudev test is because udevd repackages the requests and
sends them out again in some proprietary binary format for some
reason which is unclear to me at this time.
And this is the output when I plug in a usb drive.
add@/devices/pci0000:00/0000:00:10.0/usb6/6-2
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:10.0/usb6/6-2
SUBSYSTEM=usb
MAJOR=189
MINOR=645
DEVNAME=bus/usb/006/006
DEVTYPE=usb_device
PRODUCT=90c/1000/1100
TYPE=0/0/0
BUSNUM=006
DEVNUM=006
SEQNUM=7439
add@/devices/pci0000:00/0000:00:10.0/usb6/6-2/6-2:1.0
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:10.0/usb6/6-2/6-2:1.0
SUBSYSTEM=usb
DEVTYPE=usb_interface
PRODUCT=90c/1000/1100
TYPE=0/0/0
INTERFACE=8/6/80
MODALIAS=usb:v090Cp1000d1100dc00dsc00dp00ic08isc06ip50in00
SEQNUM=7440
add@/devices/pci0000:00/0000:00:10.0/usb6/6-2/6-2:1.0/host6
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:10.0/usb6/6-2/6-2:1.0/host6
SUBSYSTEM=scsi
DEVTYPE=scsi_host
SEQNUM=7441
add@/devices/pci0000:00/0000:00:10.0/usb6/6-2/6-2:1.0/host6/scsi_host/host6
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:10.0/usb6/6-2/6-2:1.0/host6/scsi_host/host6
SUBSYSTEM=scsi_host
SEQNUM=7442
bind@/devices/pci0000:00/0000:00:10.0/usb6/6-2/6-2:1.0
ACTION=bind
DEVPATH=/devices/pci0000:00/0000:00:10.0/usb6/6-2/6-2:1.0
SUBSYSTEM=usb
DEVTYPE=usb_interface
DRIVER=usb-storage
PRODUCT=90c/1000/1100
TYPE=0/0/0
INTERFACE=8/6/80
MODALIAS=usb:v090Cp1000d1100dc00dsc00dp00ic08isc06ip50in00
SEQNUM=7443
bind@/devices/pci0000:00/0000:00:10.0/usb6/6-2
ACTION=bind
DEVPATH=/devices/pci0000:00/0000:00:10.0/usb6/6-2
SUBSYSTEM=usb
MAJOR=189
MINOR=645
DEVNAME=bus/usb/006/006
DEVTYPE=usb_device
DRIVER=usb
PRODUCT=90c/1000/1100
TYPE=0/0/0
BUSNUM=006
DEVNUM=006
SEQNUM=7444
6c 69 62 75 64 65 76 00 fe ed ca fe 28 00 00 00 libudev.....(...
28 00 00 00 89 02 00 00 05 77 c5 e5 27 f8 f5 0c (........w..'...
00 00 00 00 00 00 00 00 41 43 54 49 4f 4e 3d 61 ........ACTION=a
64 64 00 44 45 56 50 41 54 48 3d 2f 64 65 76 69 dd.DEVPATH=/devi
63 65 73 2f 70 63 69 30 30 30 30 3a 30 30 2f 30 ces/pci0000:00/0
30 30 30 3a 30 30 3a 31 30 2e 30 2f 75 73 62 36 000:00:10.0/usb6
2f 36 2d 32 00 53 55 42 53 59 53 54 45 4d 3d 75 /6-2.SUBSYSTEM=u
73 62 00 44 45 56 4e 41 4d 45 3d 2f 64 65 76 2f sb.DEVNAME=/dev/
62 75 73 2f 75 73 62 2f 30 30 36 2f 30 30 36 00 bus/usb/006/006.
44 45 56 54 59 50 45 3d 75 73 62 5f 64 65 76 69 DEVTYPE=usb_devi
63 65 00 50 52 4f 44 55 43 54 3d 39 30 63 2f 31 ce.PRODUCT=90c/1
30 30 30 2f 31 31 30 30 00 54 59 50 45 3d 30 2f 000/1100.TYPE=0/
30 2f 30 00 42 55 53 4e 55 4d 3d 30 30 36 00 44 0/0.BUSNUM=006.D
45 56 4e 55 4d 3d 30 30 36 00 53 45 51 4e 55 4d EVNUM=006.SEQNUM
3d 37 34 33 39 00 4d 41 4a 4f 52 3d 31 38 39 00 =7439.MAJOR=189.
4d 49 4e 4f 52 3d 36 34 35 00 55 53 45 43 5f 49 MINOR=645.USEC_I
4e 49 54 49 41 4c 49 5a 45 44 3d 32 30 35 35 39 NITIALIZED=20559
39 39 33 30 37 35 34 35 00 49 44 5f 56 45 4e 44 99307545.ID_VEND
4f 52 3d 53 61 6d 73 75 6e 67 00 49 44 5f 56 45 OR=Samsung.ID_VE
4e 44 4f 52 5f 45 4e 43 3d 53 61 6d 73 75 6e 67 NDOR_ENC=Samsung
00 49 44 5f 56 45 4e 44 4f 52 5f 49 44 3d 30 39 .ID_VENDOR_ID=09
30 63 00 49 44 5f 4d 4f 44 45 4c 3d 46 6c 61 73 0c.ID_MODEL=Flas
68 5f 44 72 69 76 65 5f 44 55 4f 00 49 44 5f 4d h_Drive_DUO.ID_M
4f 44 45 4c 5f 45 4e 43 3d 46 6c 61 73 68 5c 78 ODEL_ENC=Flash\x
32 30 44 72 69 76 65 5c 78 32 30 44 55 4f 00 49 20Drive\x20DUO.I
44 5f 4d 4f 44 45 4c 5f 49 44 3d 31 30 30 30 00 D_MODEL_ID=1000.
49 44 5f 52 45 56 49 53 49 4f 4e 3d 31 31 30 30 ID_REVISION=1100
00 49 44 5f 53 45 52 49 41 4c 3d 53 61 6d 73 75 .ID_SERIAL=Samsu
6e 67 5f 46 6c 61 73 68 5f 44 72 69 76 65 5f 44 ng_Flash_Drive_D
55 4f 5f 30 33 33 31 35 31 36 30 37 30 30 31 38 UO_0331516070018
38 31 31 00 49 44 5f 53 45 52 49 41 4c 5f 53 48 811.ID_SERIAL_SH
4f 52 54 3d 30 33 33 31 35 31 36 30 37 30 30 31 ORT=033151607001
38 38 31 31 00 49 44 5f 42 55 53 3d 75 73 62 00 8811.ID_BUS=usb.
49 44 5f 55 53 42 5f 49 4e 54 45 52 46 41 43 45 ID_USB_INTERFACE
53 3d 3a 30 38 30 36 35 30 3a 00 49 44 5f 56 45 S=:080650:.ID_VE
4e 44 4f 52 5f 46 52 4f 4d 5f 44 41 54 41 42 41 NDOR_FROM_DATABA
53 45 3d 53 69 6c 69 63 6f 6e 20 4d 6f 74 69 6f SE=Silicon Motio
6e 2c 20 49 6e 63 2e 20 2d 20 54 61 69 77 61 6e n, Inc. - Taiwan
20 28 66 6f 72 6d 65 72 6c 79 20 46 65 69 79 61 (formerly Feiya
20 54 65 63 68 6e 6f 6c 6f 67 79 20 43 6f 72 70 Technology Corp
2e 29 00 49 44 5f 4d 4f 44 45 4c 5f 46 52 4f 4d .).ID_MODEL_FROM
5f 44 41 54 41 42 41 53 45 3d 46 6c 61 73 68 20 _DATABASE=Flash
44 72 69 76 65 00 44 52 49 56 45 52 3d 75 73 62 Drive.DRIVER=usb
00 .
6c 69 62 75 64 65 76 00 fe ed ca fe 28 00 00 00 libudev.....(...
28 00 00 00 8f 01 00 00 05 77 c5 e5 b1 02 47 65 (........w....Ge
00 00 00 00 00 00 00 00 41 43 54 49 4f 4e 3d 61 ........ACTION=a
64 64 00 44 45 56 50 41 54 48 3d 2f 64 65 76 69 dd.DEVPATH=/devi
63 65 73 2f 70 63 69 30 30 30 30 3a 30 30 2f 30 ces/pci0000:00/0
30 30 30 3a 30 30 3a 31 30 2e 30 2f 75 73 62 36 000:00:10.0/usb6
2f 36 2d 32 2f 36 2d 32 3a 31 2e 30 00 53 55 42 /6-2/6-2:1.0.SUB
53 59 53 54 45 4d 3d 75 73 62 00 44 45 56 54 59 SYSTEM=usb.DEVTY
50 45 3d 75 73 62 5f 69 6e 74 65 72 66 61 63 65 PE=usb_interface
00 50 52 4f 44 55 43 54 3d 39 30 63 2f 31 30 30 .PRODUCT=90c/100
30 2f 31 31 30 30 00 54 59 50 45 3d 30 2f 30 2f 0/1100.TYPE=0/0/
30 00 49 4e 54 45 52 46 41 43 45 3d 38 2f 36 2f 0.INTERFACE=8/6/
38 30 00 4d 4f 44 41 4c 49 41 53 3d 75 73 62 3a 80.MODALIAS=usb:
76 30 39 30 43 70 31 30 30 30 64 31 31 30 30 64 v090Cp1000d1100d
63 30 30 64 73 63 30 30 64 70 30 30 69 63 30 38 c00dsc00dp00ic08
69 73 63 30 36 69 70 35 30 69 6e 30 30 00 53 45 isc06ip50in00.SE
51 4e 55 4d 3d 37 34 34 30 00 55 53 45 43 5f 49 QNUM=7440.USEC_I
4e 49 54 49 41 4c 49 5a 45 44 3d 32 30 35 35 39 NITIALIZED=20559
39 39 33 30 39 32 38 36 00 49 44 5f 56 45 4e 44 99309286.ID_VEND
4f 52 5f 46 52 4f 4d 5f 44 41 54 41 42 41 53 45 OR_FROM_DATABASE
3d 53 69 6c 69 63 6f 6e 20 4d 6f 74 69 6f 6e 2c =Silicon Motion,
20 49 6e 63 2e 20 2d 20 54 61 69 77 61 6e 20 28 Inc. - Taiwan (
66 6f 72 6d 65 72 6c 79 20 46 65 69 79 61 20 54 formerly Feiya T
65 63 68 6e 6f 6c 6f 67 79 20 43 6f 72 70 2e 29 echnology Corp.)
00 49 44 5f 4d 4f 44 45 4c 5f 46 52 4f 4d 5f 44 .ID_MODEL_FROM_D
41 54 41 42 41 53 45 3d 46 6c 61 73 68 20 44 72 ATABASE=Flash Dr
69 76 65 00 44 52 49 56 45 52 3d 75 73 62 2d 73 ive.DRIVER=usb-s
74 6f 72 61 67 65 00 torage.
6c 69 62 75 64 65 76 00 fe ed ca fe 28 00 00 00 libudev.....(...
28 00 00 00 97 00 00 00 29 20 1a 28 a0 05 fb 58 (.......) .(...X
00 00 00 00 00 00 00 00 41 43 54 49 4f 4e 3d 61 ........ACTION=a
64 64 00 44 45 56 50 41 54 48 3d 2f 64 65 76 69 dd.DEVPATH=/devi
63 65 73 2f 70 63 69 30 30 30 30 3a 30 30 2f 30 ces/pci0000:00/0
30 30 30 3a 30 30 3a 31 30 2e 30 2f 75 73 62 36 000:00:10.0/usb6
2f 36 2d 32 2f 36 2d 32 3a 31 2e 30 2f 68 6f 73 /6-2/6-2:1.0/hos
74 36 00 53 55 42 53 59 53 54 45 4d 3d 73 63 73 t6.SUBSYSTEM=scs
69 00 44 45 56 54 59 50 45 3d 73 63 73 69 5f 68 i.DEVTYPE=scsi_h
6f 73 74 00 53 45 51 4e 55 4d 3d 37 34 34 31 00 ost.SEQNUM=7441.
55 53 45 43 5f 49 4e 49 54 49 41 4c 49 5a 45 44 USEC_INITIALIZED
3d 32 30 35 35 39 39 39 33 31 30 38 39 37 00 =2055999310897.
6c 69 62 75 64 65 76 00 fe ed ca fe 28 00 00 00 libudev.....(...
28 00 00 00 9a 00 00 00 a0 05 fb 58 00 00 00 00 (..........X....
00 00 00 00 00 00 00 00 41 43 54 49 4f 4e 3d 61 ........ACTION=a
64 64 00 44 45 56 50 41 54 48 3d 2f 64 65 76 69 dd.DEVPATH=/devi
63 65 73 2f 70 63 69 30 30 30 30 3a 30 30 2f 30 ces/pci0000:00/0
30 30 30 3a 30 30 3a 31 30 2e 30 2f 75 73 62 36 000:00:10.0/usb6
2f 36 2d 32 2f 36 2d 32 3a 31 2e 30 2f 68 6f 73 /6-2/6-2:1.0/hos
74 36 2f 73 63 73 69 5f 68 6f 73 74 2f 68 6f 73 t6/scsi_host/hos
74 36 00 53 55 42 53 59 53 54 45 4d 3d 73 63 73 t6.SUBSYSTEM=scs
69 5f 68 6f 73 74 00 53 45 51 4e 55 4d 3d 37 34 i_host.SEQNUM=74
34 32 00 55 53 45 43 5f 49 4e 49 54 49 41 4c 49 42.USEC_INITIALI
5a 45 44 3d 32 30 35 35 39 39 39 33 31 31 38 36 ZED=205599931186
31 00 1.
add@/devices/pci0000:00/0000:00:10.0/usb6/6-2/6-2:1.0/host6/target6:0:0
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:10.0/usb6/6-2/6-2:1.0/host6/target6:0:0
SUBSYSTEM=scsi
DEVTYPE=scsi_target
SEQNUM=7445
add@/devices/pci0000:00/0000:00:10.0/usb6/6-2/6-2:1.0/host6/target6:0:0/6:0:0:0
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:10.0/usb6/6-2/6-2:1.0/host6/target6:0:0/6:0:0:0
SUBSYSTEM=scsi
DEVTYPE=scsi_device
MODALIAS=scsi:t-0x00
SEQNUM=7446
add@/devices/pci0000:00/0000:00:10.0/usb6/6-2/6-2:1.0/host6/target6:0:0/6:0:0:0/scsi_disk/6:0:0:0
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:10.0/usb6/6-2/6-2:1.0/host6/target6:0:0/6:0:0:0/scsi_disk/6:0:0:0
SUBSYSTEM=scsi_disk
SEQNUM=7447
bind@/devices/pci0000:00/0000:00:10.0/usb6/6-2/6-2:1.0/host6/target6:0:0/6:0:0:0
ACTION=bind
DEVPATH=/devices/pci0000:00/0000:00:10.0/usb6/6-2/6-2:1.0/host6/target6:0:0/6:0:0:0
SUBSYSTEM=scsi
DEVTYPE=scsi_device
DRIVER=sd
MODALIAS=scsi:t-0x00
SEQNUM=7448
add@/devices/pci0000:00/0000:00:10.0/usb6/6-2/6-2:1.0/host6/target6:0:0/6:0:0:0/scsi_device/6:0:0:0
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:10.0/usb6/6-2/6-2:1.0/host6/target6:0:0/6:0:0:0/scsi_device/6:0:0:0
SUBSYSTEM=scsi_device
SEQNUM=7449
add@/devices/pci0000:00/0000:00:10.0/usb6/6-2/6-2:1.0/host6/target6:0:0/6:0:0:0/scsi_generic/sg1
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:10.0/usb6/6-2/6-2:1.0/host6/target6:0:0/6:0:0:0/scsi_generic/sg1
SUBSYSTEM=scsi_generic
MAJOR=21
MINOR=1
DEVNAME=sg1
SEQNUM=7450
add@/devices/pci0000:00/0000:00:10.0/usb6/6-2/6-2:1.0/host6/target6:0:0/6:0:0:0/bsg/6:0:0:0
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:10.0/usb6/6-2/6-2:1.0/host6/target6:0:0/6:0:0:0/bsg/6:0:0:0
SUBSYSTEM=bsg
MAJOR=246
MINOR=1
DEVNAME=bsg/6:0:0:0
SEQNUM=7451
6c 69 62 75 64 65 76 00 fe ed ca fe 28 00 00 00 libudev.....(...
28 00 00 00 a5 00 00 00 29 20 1a 28 f2 6a 9f 62 (.......) .(.j.b
00 00 00 00 00 00 00 00 41 43 54 49 4f 4e 3d 61 ........ACTION=a
64 64 00 44 45 56 50 41 54 48 3d 2f 64 65 76 69 dd.DEVPATH=/devi
63 65 73 2f 70 63 69 30 30 30 30 3a 30 30 2f 30 ces/pci0000:00/0
30 30 30 3a 30 30 3a 31 30 2e 30 2f 75 73 62 36 000:00:10.0/usb6
2f 36 2d 32 2f 36 2d 32 3a 31 2e 30 2f 68 6f 73 /6-2/6-2:1.0/hos
74 36 2f 74 61 72 67 65 74 36 3a 30 3a 30 00 53 t6/target6:0:0.S
55 42 53 59 53 54 45 4d 3d 73 63 73 69 00 44 45 UBSYSTEM=scsi.DE
56 54 59 50 45 3d 73 63 73 69 5f 74 61 72 67 65 VTYPE=scsi_targe
74 00 53 45 51 4e 55 4d 3d 37 34 34 35 00 55 53 t.SEQNUM=7445.US
45 43 5f 49 4e 49 54 49 41 4c 49 5a 45 44 3d 32 EC_INITIALIZED=2
30 35 36 30 30 30 36 35 39 36 37 32 00 056000659672.
add@/devices/virtual/bdi/8:16
ACTION=add
DEVPATH=/devices/virtual/bdi/8:16
SUBSYSTEM=bdi
SEQNUM=7452
6c 69 62 75 64 65 76 00 fe ed ca fe 28 00 00 00 libudev.....(...
28 00 00 00 cc 00 00 00 29 20 1a 28 7d b5 06 b5 (.......) .(}...
00 00 00 00 00 00 00 00 41 43 54 49 4f 4e 3d 61 ........ACTION=a
64 64 00 44 45 56 50 41 54 48 3d 2f 64 65 76 69 dd.DEVPATH=/devi
63 65 73 2f 70 63 69 30 30 30 30 3a 30 30 2f 30 ces/pci0000:00/0
30 30 30 3a 30 30 3a 31 30 2e 30 2f 75 73 62 36 000:00:10.0/usb6
2f 36 2d 32 2f 36 2d 32 3a 31 2e 30 2f 68 6f 73 /6-2/6-2:1.0/hos
74 36 2f 74 61 72 67 65 74 36 3a 30 3a 30 2f 36 t6/target6:0:0/6
3a 30 3a 30 3a 30 00 53 55 42 53 59 53 54 45 4d :0:0:0.SUBSYSTEM
3d 73 63 73 69 00 44 45 56 54 59 50 45 3d 73 63 =scsi.DEVTYPE=sc
73 69 5f 64 65 76 69 63 65 00 4d 4f 44 41 4c 49 si_device.MODALI
41 53 3d 73 63 73 69 3a 74 2d 30 78 30 30 00 53 AS=scsi:t-0x00.S
45 51 4e 55 4d 3d 37 34 34 36 00 55 53 45 43 5f EQNUM=7446.USEC_
49 4e 49 54 49 41 4c 49 5a 45 44 3d 32 30 35 36 INITIALIZED=2056
30 30 30 36 36 31 36 31 35 00 44 52 49 56 45 52 000661615.DRIVER
3d 73 64 00 =sd.
6c 69 62 75 64 65 76 00 fe ed ca fe 28 00 00 00 libudev.....(...
28 00 00 00 66 00 00 00 2a 18 84 a1 00 00 00 00 (...f...*.......
00 00 00 00 00 00 00 00 41 43 54 49 4f 4e 3d 61 ........ACTION=a
64 64 00 44 45 56 50 41 54 48 3d 2f 64 65 76 69 dd.DEVPATH=/devi
63 65 73 2f 76 69 72 74 75 61 6c 2f 62 64 69 2f ces/virtual/bdi/
38 3a 31 36 00 53 55 42 53 59 53 54 45 4d 3d 62 8:16.SUBSYSTEM=b
64 69 00 53 45 51 4e 55 4d 3d 37 34 35 32 00 55 di.SEQNUM=7452.U
53 45 43 5f 49 4e 49 54 49 41 4c 49 5a 45 44 3d SEC_INITIALIZED=
32 30 35 36 30 30 30 36 36 32 34 30 31 00 2056000662401.
6c 69 62 75 64 65 76 00 fe ed ca fe 28 00 00 00 libudev.....(...
28 00 00 00 b4 00 00 00 7d b5 06 b5 00 00 00 00 (.......}.......
00 00 00 00 00 00 00 00 41 43 54 49 4f 4e 3d 61 ........ACTION=a
64 64 00 44 45 56 50 41 54 48 3d 2f 64 65 76 69 dd.DEVPATH=/devi
63 65 73 2f 70 63 69 30 30 30 30 3a 30 30 2f 30 ces/pci0000:00/0
30 30 30 3a 30 30 3a 31 30 2e 30 2f 75 73 62 36 000:00:10.0/usb6
2f 36 2d 32 2f 36 2d 32 3a 31 2e 30 2f 68 6f 73 /6-2/6-2:1.0/hos
74 36 2f 74 61 72 67 65 74 36 3a 30 3a 30 2f 36 t6/target6:0:0/6
3a 30 3a 30 3a 30 2f 73 63 73 69 5f 64 65 76 69 :0:0:0/scsi_devi
63 65 2f 36 3a 30 3a 30 3a 30 00 53 55 42 53 59 ce/6:0:0:0.SUBSY
53 54 45 4d 3d 73 63 73 69 5f 64 65 76 69 63 65 STEM=scsi_device
00 53 45 51 4e 55 4d 3d 37 34 34 39 00 55 53 45 .SEQNUM=7449.USE
43 5f 49 4e 49 54 49 41 4c 49 5a 45 44 3d 32 30 C_INITIALIZED=20
35 36 30 30 30 36 36 35 31 34 31 00 56000665141.
add@/devices/pci0000:00/0000:00:10.0/usb6/6-2/6-2:1.0/host6/target6:0:0/6:0:0:0/block/sdb
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:10.0/usb6/6-2/6-2:1.0/host6/target6:0:0/6:0:0:0/block/sdb
SUBSYSTEM=block
MAJOR=8
MINOR=16
DEVNAME=sdb
DEVTYPE=disk
SEQNUM=7453
add@/devices/pci0000:00/0000:00:10.0/usb6/6-2/6-2:1.0/host6/target6:0:0/6:0:0:0/block/sdb/sdb1
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:10.0/usb6/6-2/6-2:1.0/host6/target6:0:0/6:0:0:0/block/sdb/sdb1
SUBSYSTEM=block
MAJOR=8
MINOR=17
DEVNAME=sdb1
DEVTYPE=partition
PARTN=1
SEQNUM=7454
6c 69 62 75 64 65 76 00 fe ed ca fe 28 00 00 00 libudev.....(...
28 00 00 00 b0 00 00 00 89 0e a9 0f 00 00 00 00 (...............
00 00 00 00 00 00 00 00 41 43 54 49 4f 4e 3d 61 ........ACTION=a
64 64 00 44 45 56 50 41 54 48 3d 2f 64 65 76 69 dd.DEVPATH=/devi
63 65 73 2f 70 63 69 30 30 30 30 3a 30 30 2f 30 ces/pci0000:00/0
30 30 30 3a 30 30 3a 31 30 2e 30 2f 75 73 62 36 000:00:10.0/usb6
2f 36 2d 32 2f 36 2d 32 3a 31 2e 30 2f 68 6f 73 /6-2/6-2:1.0/hos
74 36 2f 74 61 72 67 65 74 36 3a 30 3a 30 2f 36 t6/target6:0:0/6
3a 30 3a 30 3a 30 2f 73 63 73 69 5f 64 69 73 6b :0:0:0/scsi_disk
2f 36 3a 30 3a 30 3a 30 00 53 55 42 53 59 53 54 /6:0:0:0.SUBSYST
45 4d 3d 73 63 73 69 5f 64 69 73 6b 00 53 45 51 EM=scsi_disk.SEQ
4e 55 4d 3d 37 34 34 37 00 55 53 45 43 5f 49 4e NUM=7447.USEC_IN
49 54 49 41 4c 49 5a 45 44 3d 32 30 35 36 30 30 ITIALIZED=205600
30 36 36 36 30 33 30 00 0666030.
6c 69 62 75 64 65 76 00 fe ed ca fe 28 00 00 00 libudev.....(...
28 00 00 00 d4 00 00 00 3c e8 b1 f8 00 00 00 00 (.......<.......
00 00 00 00 00 00 00 00 41 43 54 49 4f 4e 3d 61 ........ACTION=a
64 64 00 44 45 56 50 41 54 48 3d 2f 64 65 76 69 dd.DEVPATH=/devi
63 65 73 2f 70 63 69 30 30 30 30 3a 30 30 2f 30 ces/pci0000:00/0
30 30 30 3a 30 30 3a 31 30 2e 30 2f 75 73 62 36 000:00:10.0/usb6
2f 36 2d 32 2f 36 2d 32 3a 31 2e 30 2f 68 6f 73 /6-2/6-2:1.0/hos
74 36 2f 74 61 72 67 65 74 36 3a 30 3a 30 2f 36 t6/target6:0:0/6
3a 30 3a 30 3a 30 2f 73 63 73 69 5f 67 65 6e 65 :0:0:0/scsi_gene
72 69 63 2f 73 67 31 00 53 55 42 53 59 53 54 45 ric/sg1.SUBSYSTE
4d 3d 73 63 73 69 5f 67 65 6e 65 72 69 63 00 44 M=scsi_generic.D
45 56 4e 41 4d 45 3d 2f 64 65 76 2f 73 67 31 00 EVNAME=/dev/sg1.
53 45 51 4e 55 4d 3d 37 34 35 30 00 4d 41 4a 4f SEQNUM=7450.MAJO
52 3d 32 31 00 4d 49 4e 4f 52 3d 31 00 55 53 45 R=21.MINOR=1.USE
43 5f 49 4e 49 54 49 41 4c 49 5a 45 44 3d 32 30 C_INITIALIZED=20
35 36 30 30 30 36 36 36 35 39 35 00 56000666595.
6c 69 62 75 64 65 76 00 fe ed ca fe 28 00 00 00 libudev.....(...
28 00 00 00 cf 00 00 00 0d df d8 a1 00 00 00 00 (...............
00 00 00 00 00 00 00 00 41 43 54 49 4f 4e 3d 61 ........ACTION=a
64 64 00 44 45 56 50 41 54 48 3d 2f 64 65 76 69 dd.DEVPATH=/devi
63 65 73 2f 70 63 69 30 30 30 30 3a 30 30 2f 30 ces/pci0000:00/0
30 30 30 3a 30 30 3a 31 30 2e 30 2f 75 73 62 36 000:00:10.0/usb6
2f 36 2d 32 2f 36 2d 32 3a 31 2e 30 2f 68 6f 73 /6-2/6-2:1.0/hos
74 36 2f 74 61 72 67 65 74 36 3a 30 3a 30 2f 36 t6/target6:0:0/6
3a 30 3a 30 3a 30 2f 62 73 67 2f 36 3a 30 3a 30 :0:0:0/bsg/6:0:0
3a 30 00 53 55 42 53 59 53 54 45 4d 3d 62 73 67 :0.SUBSYSTEM=bsg
00 44 45 56 4e 41 4d 45 3d 2f 64 65 76 2f 62 73 .DEVNAME=/dev/bs
67 2f 36 3a 30 3a 30 3a 30 00 53 45 51 4e 55 4d g/6:0:0:0.SEQNUM
3d 37 34 35 31 00 4d 41 4a 4f 52 3d 32 34 36 00 =7451.MAJOR=246.
4d 49 4e 4f 52 3d 31 00 55 53 45 43 5f 49 4e 49 MINOR=1.USEC_INI
54 49 41 4c 49 5a 45 44 3d 32 30 35 36 30 30 30 TIALIZED=2056000
36 36 37 30 34 32 00 667042.
6c 69 62 75 64 65 76 00 fe ed ca fe 28 00 00 00 libudev.....(...
28 00 00 00 54 03 00 00 f0 03 1d b7 7b cb c5 ee (...T.......{...
02 00 04 00 10 80 00 00 41 43 54 49 4f 4e 3d 61 ........ACTION=a
64 64 00 44 45 56 50 41 54 48 3d 2f 64 65 76 69 dd.DEVPATH=/devi
63 65 73 2f 70 63 69 30 30 30 30 3a 30 30 2f 30 ces/pci0000:00/0
30 30 30 3a 30 30 3a 31 30 2e 30 2f 75 73 62 36 000:00:10.0/usb6
2f 36 2d 32 2f 36 2d 32 3a 31 2e 30 2f 68 6f 73 /6-2/6-2:1.0/hos
74 36 2f 74 61 72 67 65 74 36 3a 30 3a 30 2f 36 t6/target6:0:0/6
3a 30 3a 30 3a 30 2f 62 6c 6f 63 6b 2f 73 64 62 :0:0:0/block/sdb
00 53 55 42 53 59 53 54 45 4d 3d 62 6c 6f 63 6b .SUBSYSTEM=block
00 44 45 56 4e 41 4d 45 3d 2f 64 65 76 2f 73 64 .DEVNAME=/dev/sd
62 00 44 45 56 54 59 50 45 3d 64 69 73 6b 00 53 b.DEVTYPE=disk.S
45 51 4e 55 4d 3d 37 34 35 33 00 55 53 45 43 5f EQNUM=7453.USEC_
49 4e 49 54 49 41 4c 49 5a 45 44 3d 32 30 35 36 INITIALIZED=2056
30 30 30 37 33 36 33 35 39 00 4d 41 4a 4f 52 3d 000736359.MAJOR=
38 00 4d 49 4e 4f 52 3d 31 36 00 49 44 5f 56 45 8.MINOR=16.ID_VE
4e 44 4f 52 3d 53 61 6d 73 75 6e 67 00 49 44 5f NDOR=Samsung.ID_
56 45 4e 44 4f 52 5f 45 4e 43 3d 53 61 6d 73 75 VENDOR_ENC=Samsu
6e 67 5c 78 32 30 00 49 44 5f 56 45 4e 44 4f 52 ng\x20.ID_VENDOR
5f 49 44 3d 30 39 30 63 00 49 44 5f 4d 4f 44 45 _ID=090c.ID_MODE
4c 3d 46 6c 61 73 68 5f 44 72 69 76 65 5f 44 55 L=Flash_Drive_DU
4f 00 49 44 5f 4d 4f 44 45 4c 5f 45 4e 43 3d 46 O.ID_MODEL_ENC=F
6c 61 73 68 5c 78 32 30 44 72 69 76 65 5c 78 32 lash\x20Drive\x2
30 44 55 4f 5c 78 32 30 00 49 44 5f 4d 4f 44 45 0DUO\x20.ID_MODE
4c 5f 49 44 3d 31 30 30 30 00 49 44 5f 52 45 56 L_ID=1000.ID_REV
49 53 49 4f 4e 3d 31 31 30 30 00 49 44 5f 53 45 ISION=1100.ID_SE
52 49 41 4c 3d 53 61 6d 73 75 6e 67 5f 46 6c 61 RIAL=Samsung_Fla
73 68 5f 44 72 69 76 65 5f 44 55 4f 5f 30 33 33 sh_Drive_DUO_033
31 35 31 36 30 37 30 30 31 38 38 31 31 2d 30 3a 1516070018811-0:
30 00 49 44 5f 53 45 52 49 41 4c 5f 53 48 4f 52 0.ID_SERIAL_SHOR
54 3d 30 33 33 31 35 31 36 30 37 30 30 31 38 38 T=03315160700188
31 31 00 49 44 5f 54 59 50 45 3d 64 69 73 6b 00 11.ID_TYPE=disk.
49 44 5f 49 4e 53 54 41 4e 43 45 3d 30 3a 30 00 ID_INSTANCE=0:0.
49 44 5f 42 55 53 3d 75 73 62 00 49 44 5f 55 53 ID_BUS=usb.ID_US
42 5f 49 4e 54 45 52 46 41 43 45 53 3d 3a 30 38 B_INTERFACES=:08
30 36 35 30 3a 00 49 44 5f 55 53 42 5f 49 4e 54 0650:.ID_USB_INT
45 52 46 41 43 45 5f 4e 55 4d 3d 30 30 00 49 44 ERFACE_NUM=00.ID
5f 55 53 42 5f 44 52 49 56 45 52 3d 75 73 62 2d _USB_DRIVER=usb-
73 74 6f 72 61 67 65 00 44 45 56 4c 49 4e 4b 53 storage.DEVLINKS
3d 2f 64 65 76 2f 64 69 73 6b 2f 62 79 2d 69 64 =/dev/disk/by-id
2f 75 73 62 2d 53 61 6d 73 75 6e 67 5f 46 6c 61 /usb-Samsung_Fla
73 68 5f 44 72 69 76 65 5f 44 55 4f 5f 30 33 33 sh_Drive_DUO_033
31 35 31 36 30 37 30 30 31 38 38 31 31 2d 30 3a 1516070018811-0:
30 20 2f 64 65 76 2f 64 69 73 6b 2f 62 79 2d 70 0 /dev/disk/by-p
61 74 68 2f 70 63 69 2d 30 30 30 30 3a 30 30 3a ath/pci-0000:00:
31 30 2e 30 2d 75 73 62 2d 30 3a 32 3a 31 2e 30 10.0-usb-0:2:1.0
2d 73 63 73 69 2d 30 3a 30 3a 30 3a 30 00 49 44 -scsi-0:0:0:0.ID
5f 50 41 54 48 3d 70 63 69 2d 30 30 30 30 3a 30 _PATH=pci-0000:0
30 3a 31 30 2e 30 2d 75 73 62 2d 30 3a 32 3a 31 0:10.0-usb-0:2:1
2e 30 2d 73 63 73 69 2d 30 3a 30 3a 30 3a 30 00 .0-scsi-0:0:0:0.
49 44 5f 50 41 54 48 5f 54 41 47 3d 70 63 69 2d ID_PATH_TAG=pci-
30 30 30 30 5f 30 30 5f 31 30 5f 30 2d 75 73 62 0000_00_10_0-usb
2d 30 5f 32 5f 31 5f 30 2d 73 63 73 69 2d 30 5f -0_2_1_0-scsi-0_
30 5f 30 5f 30 00 49 44 5f 50 41 52 54 5f 54 41 0_0_0.ID_PART_TA
42 4c 45 5f 54 59 50 45 3d 64 6f 73 00 54 41 47 BLE_TYPE=dos.TAG
53 3d 3a 73 79 73 74 65 6d 64 3a 00 S=:systemd:.
6c 69 62 75 64 65 76 00 fe ed ca fe 28 00 00 00 libudev.....(...
28 00 00 00 e5 04 00 00 f0 03 1d b7 cb 23 44 89 (............#D.
02 00 04 00 10 80 00 00 41 43 54 49 4f 4e 3d 61 ........ACTION=a
64 64 00 44 45 56 50 41 54 48 3d 2f 64 65 76 69 dd.DEVPATH=/devi
63 65 73 2f 70 63 69 30 30 30 30 3a 30 30 2f 30 ces/pci0000:00/0
30 30 30 3a 30 30 3a 31 30 2e 30 2f 75 73 62 36 000:00:10.0/usb6
2f 36 2d 32 2f 36 2d 32 3a 31 2e 30 2f 68 6f 73 /6-2/6-2:1.0/hos
74 36 2f 74 61 72 67 65 74 36 3a 30 3a 30 2f 36 t6/target6:0:0/6
3a 30 3a 30 3a 30 2f 62 6c 6f 63 6b 2f 73 64 62 :0:0:0/block/sdb
2f 73 64 62 31 00 53 55 42 53 59 53 54 45 4d 3d /sdb1.SUBSYSTEM=
62 6c 6f 63 6b 00 44 45 56 4e 41 4d 45 3d 2f 64 block.DEVNAME=/d
65 76 2f 73 64 62 31 00 44 45 56 54 59 50 45 3d ev/sdb1.DEVTYPE=
70 61 72 74 69 74 69 6f 6e 00 50 41 52 54 4e 3d partition.PARTN=
31 00 53 45 51 4e 55 4d 3d 37 34 35 34 00 55 53 1.SEQNUM=7454.US
45 43 5f 49 4e 49 54 49 41 4c 49 5a 45 44 3d 32 EC_INITIALIZED=2
30 35 36 30 30 30 37 39 35 39 37 39 00 4d 41 4a 056000795979.MAJ
4f 52 3d 38 00 4d 49 4e 4f 52 3d 31 37 00 49 44 OR=8.MINOR=17.ID
5f 42 55 53 3d 75 73 62 00 49 44 5f 49 4e 53 54 _BUS=usb.ID_INST
41 4e 43 45 3d 30 3a 30 00 49 44 5f 4d 4f 44 45 ANCE=0:0.ID_MODE
4c 3d 46 6c 61 73 68 5f 44 72 69 76 65 5f 44 55 L=Flash_Drive_DU
4f 00 49 44 5f 4d 4f 44 45 4c 5f 45 4e 43 3d 46 O.ID_MODEL_ENC=F
6c 61 73 68 5c 78 32 30 44 72 69 76 65 5c 78 32 lash\x20Drive\x2
30 44 55 4f 5c 78 32 30 00 49 44 5f 4d 4f 44 45 0DUO\x20.ID_MODE
4c 5f 49 44 3d 31 30 30 30 00 49 44 5f 50 41 52 L_ID=1000.ID_PAR
54 5f 54 41 42 4c 45 5f 54 59 50 45 3d 64 6f 73 T_TABLE_TYPE=dos
00 49 44 5f 50 41 54 48 3d 70 63 69 2d 30 30 30 .ID_PATH=pci-000
30 3a 30 30 3a 31 30 2e 30 2d 75 73 62 2d 30 3a 0:00:10.0-usb-0:
32 3a 31 2e 30 2d 73 63 73 69 2d 30 3a 30 3a 30 2:1.0-scsi-0:0:0
3a 30 00 49 44 5f 50 41 54 48 5f 54 41 47 3d 70 :0.ID_PATH_TAG=p
63 69 2d 30 30 30 30 5f 30 30 5f 31 30 5f 30 2d ci-0000_00_10_0-
75 73 62 2d 30 5f 32 5f 31 5f 30 2d 73 63 73 69 usb-0_2_1_0-scsi
2d 30 5f 30 5f 30 5f 30 00 49 44 5f 52 45 56 49 -0_0_0_0.ID_REVI
53 49 4f 4e 3d 31 31 30 30 00 49 44 5f 53 45 52 SION=1100.ID_SER
49 41 4c 3d 53 61 6d 73 75 6e 67 5f 46 6c 61 73 IAL=Samsung_Flas
68 5f 44 72 69 76 65 5f 44 55 4f 5f 30 33 33 31 h_Drive_DUO_0331
35 31 36 30 37 30 30 31 38 38 31 31 2d 30 3a 30 516070018811-0:0
00 49 44 5f 53 45 52 49 41 4c 5f 53 48 4f 52 54 .ID_SERIAL_SHORT
3d 30 33 33 31 35 31 36 30 37 30 30 31 38 38 31 =033151607001881
31 00 49 44 5f 54 59 50 45 3d 64 69 73 6b 00 49 1.ID_TYPE=disk.I
44 5f 55 53 42 5f 44 52 49 56 45 52 3d 75 73 62 D_USB_DRIVER=usb
2d 73 74 6f 72 61 67 65 00 49 44 5f 55 53 42 5f -storage.ID_USB_
49 4e 54 45 52 46 41 43 45 53 3d 3a 30 38 30 36 INTERFACES=:0806
35 30 3a 00 49 44 5f 55 53 42 5f 49 4e 54 45 52 50:.ID_USB_INTER
46 41 43 45 5f 4e 55 4d 3d 30 30 00 49 44 5f 56 FACE_NUM=00.ID_V
45 4e 44 4f 52 3d 53 61 6d 73 75 6e 67 00 49 44 ENDOR=Samsung.ID
5f 56 45 4e 44 4f 52 5f 45 4e 43 3d 53 61 6d 73 _VENDOR_ENC=Sams
75 6e 67 5c 78 32 30 00 49 44 5f 56 45 4e 44 4f ung\x20.ID_VENDO
52 5f 49 44 3d 30 39 30 63 00 44 45 56 4c 49 4e R_ID=090c.DEVLIN
4b 53 3d 2f 64 65 76 2f 64 69 73 6b 2f 62 79 2d KS=/dev/disk/by-
6c 61 62 65 6c 2f 53 61 6d 73 75 6e 67 5c 78 32 label/Samsung\x2
30 55 53 42 20 2f 64 65 76 2f 64 69 73 6b 2f 62 0USB /dev/disk/b
79 2d 70 61 74 68 2f 70 63 69 2d 30 30 30 30 3a y-path/pci-0000:
30 30 3a 31 30 2e 30 2d 75 73 62 2d 30 3a 32 3a 00:10.0-usb-0:2:
31 2e 30 2d 73 63 73 69 2d 30 3a 30 3a 30 3a 30 1.0-scsi-0:0:0:0
2d 70 61 72 74 31 20 2f 64 65 76 2f 64 69 73 6b -part1 /dev/disk
2f 62 79 2d 69 64 2f 75 73 62 2d 53 61 6d 73 75 /by-id/usb-Samsu
6e 67 5f 46 6c 61 73 68 5f 44 72 69 76 65 5f 44 ng_Flash_Drive_D
55 4f 5f 30 33 33 31 35 31 36 30 37 30 30 31 38 UO_0331516070018
38 31 31 2d 30 3a 30 2d 70 61 72 74 31 20 2f 64 811-0:0-part1 /d
65 76 2f 64 69 73 6b 2f 62 79 2d 75 75 69 64 2f ev/disk/by-uuid/
45 35 34 31 2d 43 30 44 44 00 49 44 5f 46 53 5f E541-C0DD.ID_FS_
4c 41 42 45 4c 3d 53 61 6d 73 75 6e 67 5f 55 53 LABEL=Samsung_US
42 00 49 44 5f 46 53 5f 4c 41 42 45 4c 5f 45 4e B.ID_FS_LABEL_EN
43 3d 53 61 6d 73 75 6e 67 5c 78 32 30 55 53 42 C=Samsung\x20USB
00 49 44 5f 46 53 5f 55 55 49 44 3d 45 35 34 31 .ID_FS_UUID=E541
2d 43 30 44 44 00 49 44 5f 46 53 5f 55 55 49 44 -C0DD.ID_FS_UUID
5f 45 4e 43 3d 45 35 34 31 2d 43 30 44 44 00 49 _ENC=E541-C0DD.I
44 5f 46 53 5f 56 45 52 53 49 4f 4e 3d 46 41 54 D_FS_VERSION=FAT
33 32 00 49 44 5f 46 53 5f 54 59 50 45 3d 76 66 32.ID_FS_TYPE=vf
61 74 00 49 44 5f 46 53 5f 55 53 41 47 45 3d 66 at.ID_FS_USAGE=f
69 6c 65 73 79 73 74 65 6d 00 49 44 5f 50 41 52 ilesystem.ID_PAR
54 5f 45 4e 54 52 59 5f 53 43 48 45 4d 45 3d 64 T_ENTRY_SCHEME=d
6f 73 00 49 44 5f 50 41 52 54 5f 45 4e 54 52 59 os.ID_PART_ENTRY
5f 54 59 50 45 3d 30 78 63 00 49 44 5f 50 41 52 _TYPE=0xc.ID_PAR
54 5f 45 4e 54 52 59 5f 4e 55 4d 42 45 52 3d 31 T_ENTRY_NUMBER=1
00 49 44 5f 50 41 52 54 5f 45 4e 54 52 59 5f 4f .ID_PART_ENTRY_O
46 46 53 45 54 3d 36 34 00 49 44 5f 50 41 52 54 FFSET=64.ID_PART
5f 45 4e 54 52 59 5f 53 49 5a 45 3d 31 32 35 33 _ENTRY_SIZE=1253
30 34 37 36 38 00 49 44 5f 50 41 52 54 5f 45 4e 04768.ID_PART_EN
54 52 59 5f 44 49 53 4b 3d 38 3a 31 36 00 54 41 TRY_DISK=8:16.TA
47 53 3d 3a 73 79 73 74 65 6d 64 3a 00 GS=:systemd:.
Ignoring the libudev snot there's basically a flurry of events, a
short pause, and then the last couple of interesting events where
the device nodes become available.
AS FAR AS I CAN GATHER ... there appears to be no documentation
regarding the format or order of these kernel messages; what
variables will be included and what they mean. Well there's
always the kernel source but I could find nothing in
[kernel-source]/Documnetation nor anywhere else.
I suppose it is relatively straightforward to just 'suck it and
see' but documentation would be nice all the same.
At this point I went down a rabbit hole of trying to work out who
ACTUALLY creates the /dev entries; it turns out it's the
kernel. So infact udevd isn't really doing anything particularly
useful on my system. Probably just as well now that the systemd
developers have started 'maintaining' it.
systemd
So anyway i've done a bit of prototyping and I'm sure I can get
away without needing udevd at all, systemd is thankfully not
anywhere near the mele already. Then I went down another rabbit
hole of finding out the current status of systemd.
It's still not good. And i'm pretty sure it never will be. With
any luck IBM will pull their finger out and realise what a huge
risk and waste of money the project is to their new acquisition
and throw it in the bin where it belongs. But of course i'm not
holding my breath, it's been designed to be unremovable and was
agressively promoted and pushed onto 3rd party projects for a
reason. As an aside, hopefully IBM can make jfs a first-class
filesystem citizen rather than the red-headed step-child it seems
to be these days.
The blog fromthecodefront
has a
very clear analysis of the situation. Grating narcissitic and
abusive personalities aside, this is the first time i've come
across any sourcode. It is not pretty. It looks exactly like the
code I write when i'm developing prototypes; lots of cut and
paste, poor modularisation, meaningless function names, etc.
Although I usually tend to use more comments, meaningful labels,
and fewer weird-arsed macros to 'save typing' (infact i almost
never use macros for that anymore; inline or plain functions can
usually be used). And because it's all in C, there's quite an
impedence mismatch when a scripting language would be the better
choice. This is not the type of code I force onto others, and
certainly not any system-critical components.
The developers seem to be out of their depth and absolute
arseholes when called out on it. The passive-aggressive and other
psychopathic behaviours are very troublesome; I dont deal with
abusers like that and neither should you. Multiple commenters say
that's just ad-hominem and not important: but it is important, and
these guys are not nice people.
Fortunately I usually dont have bother with systemd much anyway -
I have few services and they are running already. Shutdown and/or
suspsend are sometimes broken but I can always just pull the power
plug. Asking for passwords on encrypted disks is also pretty shit
(console output overflows the prompts); it's just something else I
have to workaround.
Actually I tried using it to stop udevd so I could determine what
if anything it was doing on my system: and it refused to let me
turn it off or disable it (or mask it, whatever they fuck they
want call it). I stopped, disabled, and masked every 'service' or
'socket' with udev in the name, no asusage. I had to chmod the
systemd-udevd binary to non-executable in the end.
The only saving grace is that systemd-udevd doesn't really do
anything so it can't really fuck it up. Even systemd doesn't
really do much apart from run a few scripts in some order.
Where's this going
Well i'm not really sure if i'll stick to a simple monolothic
music service or go the whole hog and work on a modularised
multi-process (and significnalty more secure) design. Simple is
nice but the other approach has some relatively interesting things
to play with.
But it's all very time-consuming and too sedentry. My body is
falling apart.
I need to get out of the house more; every time i get stuck into a
coding project (most recently for work) I seem to rapidly stack on
weight. It's related to some (medicinal) drugs once taken and now
stopped and obviously some over-consumption and it's fucking
pissing me off. The weight is also completely fucking up my sleep
and that's pissing me off even more. I'm pissed off a lot lately!
X-MAS 2018
I wanted a nice quiet hassle-free xmas this year so I had it
alone. My nephew (who migrated from the philippines and wont
fucking leave) is away for the week so I had the house to myself.
The rest of the family don't live in Adelaide anymore and mum can
deal with my crazy twin brother on her own.
For the fist time I fired up the coopers
bbq I won a
few months ago. I used the fire
grate I made
a few weeks ago and the fire holders from the weber. Another
modification I made was to add a socket to the battery powered
motor so I ran it from a plugpack instead of a pair of D cells.
It's pretty gutless but worked fine.
Fire started. To avoid flareups I was going to put the fire on
the sides but it wasn't necessary.
And the pork shoulder on going. I wasn't sure if the fat would
get out of hand but it worked very well, very little smoke and
only small flareups each rotation with the heat directly under the
meat.
I skewered simply the pork with lemongrass stalks and coated it in
ample salt which is my go-to basic pork roast.
What's the time? Oh it's beer time!
Actually I normally start beer at 10am on xmas day but i'd been up
since 6 (I did the last coat on the speakers, setup the bbq, and
made bread) and ran out of other things to do and it just seemed
about right.
The bread proofing. I added some semolina and didn't let it rise
as much as I normally do - made very excellent dense bread.
About 2 hours later and it's done. Actually it's a bit overdone
as it cooked faster than I expected but a shoulder is forgiving of
being overcooked and regardless, the cracking was great.
I used a bit more charcoal than I would have in the weber but it
was a fun way to cook the meat and i'll definltely do it again.
As I usually do with the weber I try to use up the remaining
left-over heat to cook whatever else I have on hand. In this case
some frozen skinless (spicy) sausages I made a few days ago. I
used too much fat in them and they were a massively disgusting
mess to make but they tasted pretty good.
Meanwhile the oven did its work. Just hitting midday at this point.
Last bit of heat. I also did a thick bit of rump.
Fucking hot day (40C) so I had the outdoor a/c going! Inside the
house was very cool but it was too nice a day for that.
A `panroama' of the back yard.
I'm rather proud of that lawn, I grew it from a few rhizomes I
took from the nature strip out on the road.
So that was xmas 2018. I didn't really drink much - i was too
chock-full of food and too tired, but I had a few beers and a few
gin and tonics (with cucumber from the garden).
But all-in-all about as low-stress and enjoyable as one could hope
for.
Making biltong made easy
After a few iterations i've managed to get biltong making down to
a pretty streamlined, 'somehwat lazy' process. It relies on the
butcher (aka supermarket) doing the brining.
First get the spices ready. This is both important and a bit
arbitrary. You can find recipes on the net but the main
ingredients are coriander seed and black pepper (and those
starting with 'one whole freshly butchered springbok' aren't very
practical).
Here's a simple one. It was enough for two small batches.
Recipe for Biltong Spices
| Amount | Ingredient |
|---|
| 1 cup | coriander seed |
| 1 tbsp | black pepper |
| 1 tbsp | allspice |
| 1 tsp | fennel seed |
| 1 handful | dried thai birds-eye hot chillies |
Actually I didn't write it down so these numbers might be a bit
off but it's about right. Thigs like allspice, fennel seeds,
ginger, cinnamon, paprika, and so on can add a nice tweak to the
basic recipe. I always add hot chillies as a matter of course, of
course.
Not terribly important here but an Australian metric tablespoon is 4x
teaspoons (20ml), not the usual 3 in the rest of the western
world.
Ideally give them all a bit of a dry-roast in a pan or the oven to
bring out the flavours. It isn't necessary but its worth it and
it smells great. Basically just keep stirring over low-medium
heat until they become aromatic and the chillies gain a bit of
colour. Here i've just started roasting them.
Then powder them. If you have the time and the equipment using a
mortar and pestle will produce a more aromatic powder; but i
usually just use a blender and keep going until it's done.
Don't breath it in if you've used any really hot chillies.
I also have a small precious supply of dried habaneros i made a
few years ago and I threw a couple of those into the blender.
Next the meat. I wait till corned silverside is on special
($8/Kg) at my local Foodland and grab a couple of them. I try to
get the largest ones they have (>1Kg), and given the packaging
is often opaque its a bit hit and miss as to the quality you get -
ideally good solid meat with little fat and gristle. Here i've
just unpackaged them and wiped off the slimey brine residue, these
are good cuts to use. Each one here is about 1.5Kg.
Corned silverside - corned beef - done this way is apparently an
Australian thing (according to my butcher brother), so if you're
from some backward arsed country that doesn't have this you'll
have to do it the long way.
So you basically just slice it into roughty 2cm thick blocks and
trim off most of the fat. It's reasonably easy to slice squarely
because the brining makes it go stiffer than raw meat. I usually
fry up the trimmings - its sort of like shit bacon, chewy but
tasty.
So that's the hardest and messiest bit out of the way. If making
it from scratch you would then brine this meat before moving to
the next stage. And you have to be concerned about brine
concentration or amount of salt (none of the recipes I found ever
say how MUCH salt to use), and so on. I haven't found the
pre-pickled meat to be completely consistent but it's always
edible once completed. Sometimes it can be a bit on the salty
side, but that just means you drink more beer.
`dip the slices of brined meat in vinegar'
aka fuck that. Pour half a cup of vinegar into the container, put the lid on, and shake the shit out of it. Drain.
'roll in the spices to cover evenly'
Pour about 1/2 a cup of the spice mix over the meat ...
Cover, and shake the shit out of it again. Done.
I used to have a bowl of vinegar i'd dip it in, then a tray of
spice to do the coating. Messy as fuck and unreliable.
Actually i'm still working on getting the ideal coating, I always
seem to put too much on because when you're applying it it doesn't
look like much but when it's dry it's heavily coated and falling
off. Next time I do it I might also try leaving it in this state
in the fridge overnight to let the flavours seep in a bit more
before starting to dry.
It took a while (literally years!) but i found a small local
caterers shop that sold small stainelss steel butchers hooks.
Previously i'd used fishing line (fucking pain to work with) then
some stainelss steel wire I fashioned into hooks (which was ok
until i found the proper ones). I bought out the shop at the time
and got 13, which was just enough for this batch.
Hang them up on the hooks. I have a small cpu fan running off an
old nokia charger to keep the air flowing to help speed up drying
and a fly-screen to keep the bugs out. I used to have a small 20W
incandescent lightglobe to help with the drying but they keep
burning out and it isn't necessary in summer.
They're ready for 'picking' 1-2 weeks later depending on the
weather and how thick you cut the meat. It will lose about 50% of
it's original weight and be very dry and hard - you need
a biltong
cutter to get through it. I've tried stopping a bit earlier
so it isn't so hard but the flavour is muted and it wont
keep anywhere near as long.
Cut into as thin slices as you could be bothered with, consume
with beer. If it's too thick it'll take a lot of chewing, if it's
too thin just cutting it becomes a chore!
It lasts forever in the fridge. I made a batch just before
getting gout a few years ago so didn't touch it for about a year -
it was still ok when I finally got through it all.
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