IRC log of #maemo for Sunday, 2015-05-31

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drathirn900 powa...00:31
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Wizzup{-0-}: yes, that works, you can even charge from it if you want01:27
{-0-}thanks, reassured now I'm not going to kill my new baby :)01:35
{-0-}though now I'm para about the usb slot...01:35
{-0-}thinking out loud.. mugen still sell the enlarged back, thinking that, wireless charging and a pass through usb slot hacked into the case01:37
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{-0-}not sane then, ok, bin that idea then,01:39
keriono no it's probably good01:40
keriowell ok actually no01:40
keriowireless charging will leave bq24k/bq27k very confused01:40
keriothe usb hub in the enlarged back is fine01:40
keriounless i misunderstood what you meant01:41
{-0-}and the usb hub would save the main port01:41
keriohold on01:41
keriothat would still require some mad soldering01:41
kerioso the usb port is not a problem01:41
{-0-}no, not on mine, but there are plenty warnings about the usb port being torn out, maybe's just over cautious01:43
keriono i mean01:43
kerioto add the modifications you planned01:43
keriothe issue with the usb pot is some botched soldering01:43
kerioif you redo the soldering, the usb port is stable01:44
{-0-}so worth doing before it breaks then01:45
{-0-}I'll have a look and see if it's within my abilities and if not stay well clear!01:46
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infobot[usbfix] - and **NEVER** use epoxy (unless you want to seal your device for underwater), or, you will basically need two irons: a small good one (or better hot-air reflow) and a 60+ Watt01:59
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L29AhLoading ui!07:27
L29Ahzsh: segmentation fault  LANG=en snappy *07:27
L29Ahnice one snappy07:27
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NIN101new rescueOS version
kerioNIN101: are you sure about "rootdelay" without a parameter18:22
kerioshouldn't it be rootwait18:22
NIN101well, it works :-).18:23
kerioand what's the point?18:24
bencohoh ... yay, thx :-)18:24
bencoh"NEW kernel rebuilt (gnoutchd)" anything added to kernel ?18:26
KotCzarnynin101: feature idea: virtual terminals and switching via ctrl-right/left18:30
NIN101kerio: there was probably a reason it was added back  then (so it boots),  or it is a leftover of something. it can't hurt.18:31
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NIN101bencoh: nothing added.18:31
NIN101KotCzarny: hmm.18:32
kerioNIN101: i would've called the kernel rescueOS-1.2.zImage or something18:32
KotCzarnymore like rescueOS-n900-1.2.zImage18:33
NIN101ok, I'll rename it.18:33
kerioit works without rootwait18:38
keriodo you even need the root= parameter18:38
KotCzarnyyou always need the root= parameter18:38
KotCzarnyunless it was known at the build time18:38
keriothere's an initrd18:38
KotCzarnyinitrd != initramfs18:38
keriohold on why is it needed to explicitly unmount the maemo root?18:39
kerioKotCzarny: yes but nothing should be mounting any root fs here18:39
NIN101who says it's needed?18:39
NIN101it should be taken care of on shutdown18:40
KotCzarnykerio, if you dont specify any root= option kernel would just hang because it wouldnt find init18:40
kerioNIN101: i meant automatically18:40
KotCzarnyunless you supply cmd line at the build time18:40
kerioas in the kernel would deal with it18:40
NIN101kerio: not sure I follow, why should the kernel unmount things automatically?18:42
keriowhy shouldn't it?18:42
NIN101kerio: write your suggestion to lkml.18:43
kerioanyway, no need for any magic cmdline apparently18:43
keriounless it was compiled in18:43
keriooh rofl18:44
KotCzarnycat /proc/cmdline18:44
keriopoweroff caused a panic18:44
keriodue to missing root18:44
KotCzarnydont mind him, he is using it in the way its not supposed to be18:46
keriowell, the initrd exited18:46
KotCzarnygood for funsies and learning, but otherwise not important18:47
kerioso the kernel tried to keep booting18:47
KotCzarnykerio, ever tried kill -9 1 ?18:47
kerioit doesn't seem like a good idea18:47
keriowait nvm that's totally harmless18:47
KotCzarnyits just the same thing18:47
L29Ahyeah it must be the same18:47
kerioinit can't be SIGKILLed18:48
KotCzarnyeverything can be killed via kill -918:48
KotCzarnyunless its a zombie18:48
L29Ahkerio: do this on your current machine then ;p18:48
keriothe linux kernel will not deliver any fatal signal to init, apparently18:49
keriowhich includes SIGKILL18:49
L29Ahit delivers SIGSEGV pretty well :318:49
KotCzarnykerio, just try it18:49
keriohold on, what *is* ram018:50
KotCzarnysave your work tho18:50
KotCzarnyseriously, you are asking newbie questions18:50
keriowow that's not condescending at all18:50
KotCzarnyram* is a ramdisk block device18:51
kerio...yes, i figured as much even without reading the documentation18:51
KotCzarnycan be created and destroyed dynamically18:51
keriowhat is it used for in rescueos?18:51
KotCzarnyfor initrd18:51
KotCzarnyand differs from initramfs in that way, that its seen as a block device, and not a plain fs18:51
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KotCzarnyso you have to prepare it via mkfs earlier18:52
KotCzarnyinitramfs is just cpio archive glued to kernel18:52
kerioyeah i was just missing the fact that "root=/dev/ram0" is actually special-cased in the kernel18:53
kerioto mean "mount the initrd as the only root"18:53
KotCzarnyyou cant have more than one root at a time18:53
KotCzarnyyou can use pivotroot etc18:53
L29Ahhow is it special?18:53
KotCzarnybut there is alsways only one /18:53
L29Ahthere's chroot ;)18:54
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KotCzarnychroot is just an emulation ;)18:54
kerioL29Ah: the initrd, if present, is *always* mounted as / on the early phases of booting18:54
L29AhKotCzarny: you can't tell18:54
KotCzarnyl29ah: cd /proc/1/cwd, done18:54
KotCzarnyor something18:54
KotCzarnyi can tell18:54
kerioit will then do its own shit and eventually it should mount the actual root and pivot_root it18:55
L29Ahlrwxrwxrwx 1 root root 0 May 31 15:55 /proc/1/cwd -> /18:55
kerioand then exec*() the new init18:55
L29Ahit lies18:55
KotCzarnyno, not ls, do cd, then do ls18:55
L29Ahsick shit18:55
KotCzarnyyeah, learned it quite a time ago18:55
L29AhKotCzarny: :*18:55
L29Ahtho i can use PID namespaces18:56
KotCzarnychroot is not safe at all18:56
KotCzarnyit's just a convenience18:56
kerioyeah, if you're leaving /proc in the jail18:56
KotCzarnykerio: there are more ways to escape chroot18:56
KotCzarnythat is just easiest18:56
keriothey all involve having root tho18:56
kerioor CAP_CHROOT, whatever18:57
keriothe easiest is definetely mkdir("tmp"), chroot("tmp"), chdir("..") x 1024, chroot(".")18:57
KotCzarnymine was 1 cmd18:58
KotCzarnyyours is 102718:58
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L29Ahkerio: didn't work19:00
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L29Ahis it possible to paginate uboot output or scroll it back?23:06
L29Ahhelp and printenv don't fit the screen23:06
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L29Ahdamn, uboot stopped to see my internal-mmc-hosted kernel after i've plugged in the external one23:31
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L29Ahoh no it does see23:37
L29Ahit's just emmc "forgot" the kernel23:37
L29Ahi woder how does this happen23:37
L29Ahwtf the directory is said to be modified two minutes ago23:38
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L29Ahyay after a reboot it REMEMBERED it back ><23:53
L29Ahi guess i should attach a power kernel to uboot to be able to reformat emmc to ext423:53
L29Ahoh, i can haz ext323:54
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