#raspbian IRC Log

Index

IRC Log for 2013-08-20

Timestamps are in GMT/BST.

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[0:05] <- *liza* Hi
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[0:47] <josvuk> what are the recomended i2c-tools version?
[0:47] <josvuk> I found a sourcepackage i2c-tools-3.1.0 is it good for rasbian ?
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[1:37] <josvuk> hm, --w--------- on i2c-1/new_device what does this means? how to access it? sudo dont works :-(
[1:38] <josvuk> adduser to group i2c ...... but how?
[1:39] <Odie_> chmod a+rx i2c-1/new_device
[1:39] <Odie_> ?
[1:39] <Odie_> chmod a+rw i2c-1/new_device
[1:48] <josvuk> there is adduser user group how to find out to which group i2c belongs?
[1:48] <Odie_> ls -l i2c-1/new_device
[1:48] <josvuk> how to find out what gruops are on the system available?
[1:49] <josvuk> ah, ...
[1:49] <Odie_> /etc/group
[1:49] <Odie_> sounds like you'd gain a lot by reading linux basics
[1:49] <Odie_> (unix basics)
[1:50] <sney> nearly everything here is relevant for raspbian http://debian-handbook.info/
[1:50] <josvuk> :-)
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[2:07] * Felix29 (Felix@c-71-193-105-131.hsd1.in.comcast.net) has joined #raspbian
[2:09] <Felix29> Hey, does anybody here run a website on a pi?
[2:09] <Felix29> I am trying to figure out if I want a CMS like Joomla or Wordpress or start coding from scratch
[2:10] <Odie_> isn't that a general web development question?
[2:10] <Felix29> Yes, I am just starting out - programming experience is there, but no webdesign
[2:10] <Felix29> I wonder what would run the fastest/smoothest
[2:13] <Odie_> I would imagine anything not retarded would work fine
[2:14] <Felix29> What do you consider not retarded?
[2:14] <Odie_> I dont have experience on cms systems, so I dont know which ones are retarded
[2:14] <Odie_> sounds like you have been toying around them in elsewhere, that should give you a good idea
[2:15] <Felix29> yeah, but I am not sure which one works fine. I found that all *can* be used, so I am looking for people with experience to get their opinion
[2:15] <Odie_> I've seen some green headed java universiity graduates that create simple FIFO that require half a gig ram. thats what I consider retartded
[2:16] <Odie_> you are not going to use it for serious heavy duty anyways, just pick one that seems to fit your requirements best
[2:16] <Felix29> yeah, i agree :) that option is off the table
[2:16] <Felix29> well, what are the differences between them?
[2:17] <Felix29> i made some html websites ages ago, but few people seem to develop from scratch since cms systems came around
[2:18] <Felix29> do you know what the reasons are? security, just convenience or something else?
[2:18] <Odie_> I have no experience in CMS. If I'd need to do web application I'd write it from scratch
[2:18] <Odie_> CMS is used to update content in easier way, without knowledge of html
[2:18] <Odie_> so that secretaries can do it
[2:18] <Odie_> they are horrible secuirty wise
[2:18] <Felix29> that's what I was thinking because any CMS will have a lot of overhead and be quite bloated - especially on a system like a pi that might be an issue
[2:19] <Odie_> all depends on the application you are trying to make
[2:19] <Felix29> so you would suggest starting with some php tutorial and just do it from scratch?
[2:19] <Odie_> the projects that I would do, yes
[2:20] <Felix29> toying around is a good description. one thing i'd like to do is hook up a webcam to the pi. another thing is basically get electronics projects organized and share them
[2:20] <Odie_> if you are trying to write web application, just write it
[2:20] <Felix29> yeah, just wanted to make sure that's not retarded ;)
[2:21] <Odie_> cms allows easier updating of the pages
[2:21] <Odie_> so for stuff like listing your projects might be of some value
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[2:21] <Odie_> but on the otherhand, if you are familiar of making the web content in some other way, that works just fine
[2:21] <Felix29> hmm, i get your point
[2:22] <Felix29> are you just coding in a text editor or is there a good dev environment for webpages that's free?
[2:22] <Odie_> I don't do static web content either, I use just emacs
[2:23] <Odie_> but my original point is that none of this has anything to do with raspberry
[2:23] <Odie_> and everything to do with web development
[2:23] <Felix29> I see
[2:24] <Odie_> so you might get more helpful tips on some other forum
[2:24] <Felix29> thanks for your help, I'll see what I can find
[2:24] <Odie_> where people are actually doing web development
[2:24] <Felix29> Yeah, I figured there might be a few of them in here
[2:24] <Odie_> in your case the only restraint is the memory of raspberry
[2:25] <Odie_> but that should be enough for most of the solutions
[2:25] <Felix29> I read some of the webpages have pretty bad response times, especially with a webcam
[2:25] <Felix29> but I just spend an hour or two researching this so far
[2:26] * roboguy_ (~roboguy_@cpe-98-156-67-41.kc.res.rr.com) Quit (Ping timeout: 248 seconds)
[2:26] <Odie_> lots of that depends how you access the webcam
[2:27] <Odie_> how many excutables you need to spawn to get the picture out
[2:27] <Felix29> yeah, that i'll have to figure out
[2:27] <Odie_> and how responsive the camera is, does it take second to light up
[2:27] <Odie_> or are you taking the pictures beforehand and showing the most recent one
[2:27] <Odie_> instead of making new snapshot
[2:28] <Felix29> I'd use a USB webcam, so I'd have to take a snapshot
[2:28] <Odie_> yes, but you can take it beforehand
[2:28] <Felix29> streaming video would be cool, but I don't know yet how that might work
[2:28] * _Lucretia_ (~munkee@pdpc/supporter/active/lucretia) Quit (Ping timeout: 276 seconds)
[2:29] <Odie_> I've tried to play around gstreamer
[2:29] <Felix29> I got that written down
[2:30] <Felix29> it sounds interesting, but I'd first have to make a web interface
[2:30] <Odie_> raspberry has hardware accelerated h264 encoder
[2:30] <Odie_> so that helps with streaming
[2:30] <Felix29> so it'll take some time
[2:31] <Odie_> I'm toying around with ps3 eye camera with raspberry; it has lower latency than regular web cams
[2:32] <Felix29> is that connected via I2C or serial?
[2:32] <Odie_> usb
[2:32] <Felix29> I can see how those might work a little better
[2:32] <Felix29> hmm, so what makes it faster then?
[2:32] <Odie_> the camera is made different, I guess
[2:32] <Odie_> doesnt buffer frames
[2:33] <Odie_> it also allows operation for 120fps at 320x240
[2:33] <Odie_> and I think 60fps at 640x480
[2:33] * verysoftoiletppr (~verysofto@unaffiliated/softtoiletpaper) Quit (Quit: verysoftoiletppr)
[2:33] <Felix29> should be 30 fps as you have 4 times the number of pixels
[2:34] <Felix29> that's all i need, i could live with 10 actually
[2:34] <Odie_> http://wiki.tekkotsu.org/index.php/Sony_PlayStation_Eye_driver_install_instructions
[2:34] <Odie_> 60fps 640x480
[2:34] <Odie_> its probably camera limitation, not bandwidth limitation
[2:35] <Felix29> oh yeah, that's pretty fast
[2:36] <Odie_> interesting specs it has. I hope they can get same done with ps4 camera
[2:36] <Odie_> I would expect it to be with higher resolution
[2:36] <Odie_> many people toy aroudn with the microsoft kinect aswell, but I dont know if it has linux support
[2:36] * josvuk (~josef@p54ABDBB0.dip0.t-ipconnect.de) Quit (Quit: Konversation terminated!)
[2:37] <Felix29> Yeah, that camera looks wicked for the $30 it costs
[2:37] <Odie_> confirmed
[2:37] <Felix29> I might give it a try as well
[2:37] <Odie_> I got 3 of those now, gotta try to do something fun with them :)
[2:37] <Felix29> But first aim is how to get a sandbox webpage up in my little network here
[2:38] <Odie_> again, that has no raspberry limitations
[2:38] <Odie_> just do as if you would do it on normal linux
[2:38] <Felix29> Yeah, you are probably right
[2:38] <Odie_> (=more sites with instructions)
[2:38] <Felix29> might wanna look for a webdesign channnel
[2:38] <Odie_> I need to crash anyways
[2:38] <Felix29> honestly, once I figure out if I hand-code or use a CMS I'll be fine
[2:39] <Felix29> thanks again for your help
[2:39] <Odie_> I doubt you get any help from cms for the webcam project
[2:39] <Odie_> I could be wrong though
[2:39] <Odie_> (fk)
[2:39] <Odie_> afk
[2:39] <Felix29> take care
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[13:26] <GuySoft> hey all, i am trying to run some arm binary , but I get "Illegal instruction". obviously its in the wrong arcitecture. but is there a way to figure out which one? so i know what to change in the compilation?
[13:26] <SirLagz> file <binary>
[13:26] <SirLagz> or readelf
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[13:28] <GuySoft> SirLagz, how do I use readelf?
[13:29] <guysoft42> file: ELF 32-bit LSB executable, ARM, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.26, BuildID[sha1]=0xb56544383fe097b3174473b8d21c3bee4b47bc30, not stripped
[13:30] <SirLagz> readelf -h <file>
[13:30] <SirLagz> i don't even have file instealled on my Pi lol
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[13:31] <SirLagz> hmm...dunno what version 1 for file is
[13:31] <SirLagz> readelf should tell you then
[13:31] <SirLagz> hopefully
[13:32] <SirLagz> things compiled for Pi should be EABI5 version 1
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[13:37] <GuySoft> SirLagz, http://nopaste.dk/p58760
[13:37] <GuySoft> sidewalk, and file is above - does that make any sense to you?
[13:37] <SirLagz> well it looks like the right ABI....
[13:38] <GuySoft> version 5?
[13:38] <SirLagz> yeah
[13:38] <GuySoft> EABI?
[13:38] <SirLagz> yep...I'm stumped. sorry lol
[13:39] <SirLagz> I haven't done too much compiling on the PI
[13:39] <SirLagz> have a look on the forums
[13:39] <GuySoft> SirLagz, it was cross compiled
[13:39] <SirLagz> there's a few threads on this sort of thing
[13:39] <SirLagz> ahh
[13:39] <GuySoft> i am not sure what to search for
[13:39] <SirLagz> run a ldd on the file
[13:39] <SirLagz> and see what libs it links against
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[13:40] <GuySoft> its all resolved to /lib/arm...
[13:41] <GuySoft> http://nopaste.dk/p58761 SirLagz
[13:41] <GuySoft> SirLagz, is there a way to actually know the instruction?
[13:42] <GuySoft> or, i can also run binaries on a machine by HP that can execute this stuff
[13:42] <SirLagz> strace
[13:42] <SirLagz> will show you what the program calls
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[13:51] <GuySoft> SirLagz, i can't make head or tails of it, want to have a look?
[13:52] <SirLagz> sorry, I'm a bit confused myself haha
[13:52] <SirLagz> paste it up though and I'll see if i can help
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[13:54] <GuySoft> SirLagz, hang on
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[13:57] <GuySoft> SirLagz, http://gnet.homelinux.com/files/strace
[13:57] <SirLagz> looking now
[13:57] <GuySoft> SirLagz, you might also figure out what i am doing :)
[13:57] <SirLagz> some sort of local php parser...?
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[13:58] <GuySoft> SirLagz, no its my companies php on RPi
[13:58] <SirLagz> ah i see
[14:00] <GuySoft> we have some arm machine that does run this. so the question is why i guess
[14:00] <SirLagz> what cpu is on the other arm machine ?
[14:00] <GuySoft> its armV7
[14:00] <GuySoft> but we used qemu-arm-static to cross-compile
[14:00] <SirLagz> If i were you, I'd just compile it on the PI.
[14:00] <SirLagz> make sure there's no library leakage
[14:01] <GuySoft> i can't it takes days on a strong machine
[14:01] <GuySoft> the host is all armv6 stuff.
[14:01] <SirLagz> I've had a look at the strace and nothing jumps out at me =/ sorry
[14:02] <SirLagz> have you asked on the forums ?
[14:06] <werpington> is gdb on the pi?
[14:09] <GuySoft> SirLagz, not really, no
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[14:10] <GuySoft> gdb wont help because the debug symbols are striped
[14:10] <SirLagz> i'd ask on the forums, someone smarter than me will know
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[14:25] <keyvin> is anything exciting going on with raspbian development?
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[14:38] <GuySoft> SirLagz, which forum were you talking about?
[14:39] <SirLagz> The Raspberry Pi forums
[14:39] <SirLagz> ask on troubleshooting
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[14:52] <hifi> oh my, someone opened the first bug for raspbian-ua-netinst \o/
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[15:05] <passstab> is it "raspbian-ua-netinst is not the #1 RPI image"?
[15:05] <passstab> :)
[15:05] <berndi> Hi there! Sorry, this is not a raspbian specific question but serious don't know where else to ask. I am trying to clear the console remotely using rsh. rsh is set up and works fine passwordles. Now I can clear the screen that is attached to my Pi with sudo clear > /dev/tty1 - But trying to do so using rsh (rsh pi@192.168.0.1 sudo clear > /dev/tty1) gives me "cannot create /dev/tty1: Permission denied" - Any idea what I am doing wrong?
[15:07] <keyvin> berndi I don't know about your particular issue, but I suggest switching to ssh using ssh keys - its also passwordless
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[15:09] <berndi> keyvin: ssh works using the same rsa keys. it really does not matter if I use rsh or ssh in my scenario. thanks though
[15:09] <keyvin> well the other thing is that clear is part of curses IIRC
[15:10] <keyvin> so writing to a raw device likely isn't going to work the way you expect it to
[15:10] <keyvin> because the terminal library sets some environment variables that tell clear what to do
[15:10] <keyvin> details on that in man clear
[15:11] <GuySoft> SirLagz, ok strange, when i chroot to the filesystem on the pi, and run it via qemu-arm-static the binary works fine. it only fails on the Rpi
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[15:13] <berndi> keyvin: I just don't get it. I thought this was just a permissions problem
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[15:17] <keyvin> berndi, in your rsh command replace pi with root and set up passwordless access for root
[15:17] <keyvin> or just try it as root
[15:17] <keyvin> sudo ignores redirections
[15:17] <keyvin> sorry I should have seen that
[15:19] <berndi> keyvin: root of course asks for a password (which is not set in raspbian if I am not mistaken)
[15:19] <keyvin> you can set it
[15:19] <keyvin> sudo passwd
[15:19] <berndi> I don't have to sudo su root first?
[15:20] <keyvin> you can, but I don't think you have to
[15:20] <keyvin> and you never have to type root with su
[15:20] <keyvin> you can just type sudo su
[15:20] <keyvin> or even sudo bash works
[15:20] <sney> or sudo -i
[15:20] <berndi> Thank you. I will try.
[15:21] <keyvin> yeah, sudo doesn't allow redirections for security reasons
[15:21] <keyvin> you can fine tune access with sudo so certain users can only run certain commands
[15:21] <keyvin> but if you allowed redirections a user could overwrite any file as root
[15:21] <keyvin> which would be bad
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[15:23] <SirLagz> GuySoft: strange indeed...perhaps there's some ARMv7 leakage into the ARMv6 environment then
[15:30] <berndi> keyvin: I still get "permission denied" - This is really strange.
[15:30] <keyvin> WHAT IS THE EXACT COMMAND YOU ARE TYPING IN?
[15:30] <keyvin> sorry
[15:30] <keyvin> caps lock was on
[15:30] <berndi> ssh root@192.168.0.51 clear > /dev/tty1
[15:31] <keyvin> ok
[15:31] <berndi> no problem
[15:31] <keyvin> no you are redirecting the output of ssh to the local tty1
[15:31] <keyvin> wrap everything after ssh in double quotes
[15:31] <keyvin> see if that works
[15:32] <keyvin> lol
[15:32] <keyvin> sorry
[15:32] <keyvin> I misled you again
[15:33] <keyvin> My brain isn't on
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[15:33] <berndi> Hm, now it logs me in as root@pi01 but I am not getting "permission denied". I need to reboot to see if it actually works since the screen is cleared locally atm.
[15:33] <berndi> oh okay
[15:33] <keyvin> yeah
[15:33] <berndi> I'll grab something to eat and then try again
[15:33] <keyvin> one sec
[15:33] <berndi> Thanks for trying to help me :)
[15:34] <keyvin> if you type in ssh root@192.168.0.51 "clear > /dev/tty1"
[15:34] <keyvin> you will get an error about term not being set
[15:34] <keyvin> I think if you set the term environment variable
[15:34] <keyvin> one sec
[15:34] <berndi> TERM environment variable not set.
[15:35] <keyvin> ok the exact line you want
[15:35] <keyvin> is ssh root@192.168.0.51 "TERM=linux clear > /dev/tty1"
[15:35] <keyvin> that should do it
[15:36] <keyvin> I just tried it and it worked for me
[15:36] <berndi> I am not getting an error!
[15:36] <berndi> I need to reboot the pi real quick
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[15:37] <berndi> Success!
[15:37] <berndi> Sweet man! Thank you so much.
[15:37] <keyvin> great!
[15:37] <keyvin> no problem
[15:37] * berndi bows
[15:37] <keyvin> if you know anything about discreet fourier transforms and sound analysis you can always help me ;)
[15:37] <keyvin> j/k
[15:37] <keyvin> unless you do know
[15:38] <keyvin> have a good lunch!
[15:38] <GuySoft> SirLagz, is qemu-arm-static armv7 ??
[15:38] <berndi> I don't think I'd be of any help :) Thanks and thanks!
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[15:40] <SirLagz> GuySoft: not sure...
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[19:45] <josvuk> hello
[19:47] <plugwash> hi
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[21:42] * optimusprimem (~globo_com@unaffiliated/optimusprimem) Quit (Quit: Saindo)
[21:42] * optimusprimem (~globo_com@177.53.180.133) has joined #raspbian
[21:42] * optimusprimem (~globo_com@177.53.180.133) Quit (Changing host)
[21:42] * optimusprimem (~globo_com@unaffiliated/optimusprimem) has joined #raspbian
[21:50] * vagrantc (~vagrant@freegeek/vagrantc) Quit (Ping timeout: 276 seconds)
[21:51] * aegirs (~aegirs@2a01:e35:8b97:e5b0:21e:c2ff:fe11:bf1b) Quit (Remote host closed the connection)
[21:53] * lupinedk is now known as Lupinedk
[21:56] * vagrantc (~vagrant@freegeek/vagrantc) has joined #raspbian
[22:16] * matus (~matus@adsl-dyn138.91-127-185.t-com.sk) Quit (Quit: Leaving)
[22:19] * vagrantc (~vagrant@freegeek/vagrantc) Quit (Ping timeout: 276 seconds)
[22:20] * vagrantc (~vagrant@freegeek/vagrantc) has joined #raspbian
[22:26] * Broken_Biscuit (~Oliver@94-192-128-116.zone6.bethere.co.uk) Quit (Quit: End of Line)
[22:27] * guysoft42 (~guysoft@85.65.104.78.dynamic.barak-online.net) Quit (Ping timeout: 264 seconds)
[22:40] * themill (~stuart@unaffiliated/themill) Quit (Ping timeout: 256 seconds)
[22:51] * blkhawk is now known as blkaway
[23:39] * efixit (~Icedove@81.221.219.97) has joined #raspbian
[23:42] * efixit (~Icedove@81.221.219.97) Quit (Client Quit)

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