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10372 discussions

Cross platform (desktop) event driven comms application development
by Mark Rogers 14 Oct '15

14 Oct '15

I have an application where some software talks via TCP/IP to some hardware but there are issues with the communication. I need to quickly knock together a desktop application (initially running on Windows unfortunately but that's temporary so cross platform is important) that will run on the PC and to start with simply pass the messages back and forth whilst logging them, but will then need to start manipulating the messages as they pass through. So instead of <software> <-> <hardware> I'll have <software> <-> <my app> <-> <hardware> In effect I'm putting together a (legitimate!) man in the middle "attack". What tools would anyone here use? Node.js comes to mind (i have no experience of it). Probably Python with a suitable socket library (again, no experience...). The result needs to be fairly reliable (so will need to sensibly handle dropped connections, and not leak memory or lock up after a few hours/days). Obviously that depends on me doing things right but some tools make that easier than others... My app doesn't need a GUI; a hand edited text file to provide configuration will suffice. But the ability to add one if it becomes useful would be handy. -- Mark Rogers // More Solutions Ltd (Peterborough Office) // 0844 251 1450 Registered in England (0456 0902) 21 Drakes Mews, Milton Keynes, MK8 0ER

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Re: [ALUG] fstab question
by Peter Berrie 08 Oct '15

08 Oct '15

Many thanks to both. I stared at that line over and over again without seeing it! Peter

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How to add a file to a mercurial repository and then push?
by Chris Green 07 Oct '15

07 Oct '15

I have a small mercurial project, local and also on bitbucket. I want to add a .zip of the whole thing and push it to the repository but I can't get it to push. I've created the zip, added it, committed it. So locally all is well:- chris$ hg manifest License.text README.md action.php plugin.info.txt rst.zip syntax.php chris$ However it won't push it:- chris$ hg push pushing to /home/chris/dev/dokuwiki/plugins/rst searching for changes no changes found chris$ So how do I get rst.zip added to the remote repository, it's definitely not there, it's at:- https://bitbucket.org/chrisisbd/dokuwiki-plugin-rst -- Chris Green

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SVN server move
by Mark Rogers 05 Oct '15

05 Oct '15

Another "if only I could work out what to Google for..." question: I had an SVN server on old hardware, which I duplicated to new hardware and updated DNS. Then, from site (the only location any changes get made to the code) I performed a commit. However it turns out that the client had the old server IP in its hosts file (and wasn't using DNS) and was therefore committing to the old server not the new one. This has now been fixed. So what do I need to do from the client to re-send its committed changes to the new server? I believe there was actually only a single commit made if that helps. (The old server is now offline.) Mark -- Mark Rogers // More Solutions Ltd (Peterborough Office) // 0844 251 1450 Registered in England (0456 0902) 21 Drakes Mews, Milton Keynes, MK8 0ER

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[ALUG Announce] ALUG Norwich Pub Meet Thursday 8th October
by Viperfang 05 Oct '15

05 Oct '15

ALUG Announce Please send announcements to Announce(a)lists.alug.org.uk Unsub, change settings via http://lists.alug.org.uk/mailman/listinfo/announce ----- Hello Norwich Aluggers, Our monthly ALUG Norwich social meeting will be held this Thursday, 8th October at The Coach and Horses (82 Thorpe Road, Norwich, NR1 1BA). The meeting officially starts at 8pm, although some people may arrive earlier. More information on those people can be found on the list and the IRC channel. If you are unsure if you will recognise us then make yourself and your intent to attend known by either posting on list or visiting us on IRC so we can look out for you rather than hiding in the corner. Optionally you could ask at the bar if they know where the geeky computer weirdos are and they'll point you in the right direction (seriously!). Another possibility is look for heaps of electronics on a table that may possibly look like movie props that would used for detonating explosives. Feel free to bring electronics/laptops/gadgets to the meet, you will by no means be alone. Ben Bewick aka Viperfang NB: This mail is automated, please refer to the usual sources for more information. ALUG Contact Details: Website : http://www.alug.org.uk/ IRC : #alug on irc.alug.org.uk List : http://lists.alug.org.uk/mailman/listinfo Twitter : http://twitter.com/anglianlug Identica: TBA Facebook: http://www.facebook.com/group.php?gid=2381613902 ----- Send discussion replies to main(a)lists.alug.org.uk (Reply-To set) Unsub, change settings via http://lists.alug.org.uk/mailman/listinfo/announce

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Android sound recorder woe
by Bev Nicolson 05 Oct '15

05 Oct '15

4.2 Jellybean and I can’t record any sound on my phone. The app (one that came with the phone) looks as though it works but all I get from the speaker is white noise which is a shame as there have been some fabulously noisy birds tweeting away recently (pre migration, I assume.) I have tried switching it off and on again. Any ideas? A google doesn't seem to bring up any useful advice. Bev.

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File[system] encryption - what to use?
by Chris Green 04 Oct '15

04 Oct '15

I currently use two different file encryption methods, I'm wondering whether to simplify my life (slightly) by just using one. However I'm wondering if there is anything better out there, both as regards usability and effectiveness. I use encfs for one directory tree of files which I only access occasionally, I have to re-remember the command line way to decrypt them for use but it doesn't usually take long. :-) There are some security problems with encfs but for *file* encryption what else is there? For some files containing passwords I use vi[le]'s encryption which is known to be weak but it's very handy. I have a trivial script that wraps up the command sequence such that all I have to do is:- nnnn <name of encrypted file> ... and I get prompted for the password, then vi[le] opens the file and I can read it (and edit if if needed). I did try some encryption breaking software on the password files and it did a pretty bad job, it needs some 'clues' as in words that are present in the file to decrypt and, as the files don't contain many words as such, guessing these would be difficult. Are there any alternatives? File system encryption doesn't really help as the machine in question is turned on all the time with the desktop open so it would spend its whole time with the file system decrypted. It's not a laptop so it doesn't have a big risk of being stolen or lost. -- Chris Green

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What is wrong with this line in fstab?
by Peter Berrie 04 Oct '15

04 Oct '15

When I run fsck I get a message saying it failed to parse line 12 of fstab. Here is line 12: UUID=[as obtained from blkid] /home ext3 noatime defaults 0 2 It has noatime because its an SSD. Its wrapped the line of course, in the text editor its all on one line. What is wrong with it? Peter

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Disk errors causing system to lock
by Mark Rogers 01 Oct '15

01 Oct '15

This is something I've noticed before and I figured it was time I understood what was going on. If I try to access bad sectors on a failing disk my entire PC will often lock up at any point requiring disk access, even off good disks. Why is this? Eg: I am using ddrescue to recover data from a failing disk (so that disk isn't mounted and isn't in use in any way other than for data recovery). When it tries to read a bad sector, ddrescue will understandably get stuck for several seconds [1]. However, in another terminal window (or other application), whilst the bad sector is being attempted, anything which requires disk access (eg trivial operations like "ls" or command completion using tab) will hang until the timeout on the bad disk read. Why is this? I assume it's some kind of locking taking place but I don't understand why reading (eg) /dev/sdb should lock any operations on /dev/sda etc. And ref: [1]: What determines the time that it takes for an attempt to read a bad sector to time out? This is on an Ubuntu 14.04.1 desktop, although I've seen it elsewhere. Mark -- Mark Rogers // More Solutions Ltd (Peterborough Office) // 0844 251 1450 Registered in England (0456 0902) 21 Drakes Mews, Milton Keynes, MK8 0ER

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2600 meeting at 18:00 on Friday the 2nd October.
by Viperfang 29 Sep '15

29 Sep '15

Quick heads up about this months Norwich 2600 meeting, more info at http://www.norwich2600.co.uk

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