The scenario is that you have used git-svn to import an SVN repository, and you want to make use of the already-imported commits elsewhere. Unfortunately, git clone does not (currently) clone the git-svn information. It looks like we have to fully rebuild the git-svn repository, which would then mean pulling every commit from the Subversion server [...]
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Note: This is a fairly rambling explanation of recent events. I assume that you have at least a passing knowledge of LVM and its terminology. This was written to prove that it is possible to recover from Many hearing aids can handle direct audio input (DAI), often via a “shoe” that attaches to contacts on the aid itself. This shoe then provides a DAI jack (sometimes called a europlug or eurojack) that cables can be plugged into. There seems to be a complete lack of cables designed for people with a single hearing aid, [...]  November 16th, 2009 |  dai, direct audio input, europlug, hearing aid, pinout |  Hacks, Life, Tips and Tricks |  Leave a comment I recently had to restore a server that failed to boot after a power cut. This machine was a Linux VMWare host, and it had three Linux guest virtual machines that were running at the time. While we had full backups available, I decided to set myself the challenge of recovering the entire images, to save the pain of a complete rebuild. The host server partitions were LVM-formatted volumes on top of hardware RAID-1, and each of the virtual hosts were partitioned with LVM too, internally. This means that the restore process will not be at all trivial. With just a complete image of the host system, I would need to restore (deep breath) files on a partition on an LVM logical volume (inside a volume group, on a physical volume) in a VMWare hard disk stored on LVM (logical volume inside volume group of physical volumes) inside a disk image that is itself a file on a disk. How very convoluted. I used a Gentoo system to restore the data, although any Linux system with the appropriate packages should be able to do it. No searches turned up information on doing all of this, and I had to come up with some of it myself, so I thought I would document the process. I’ve been developing Insight even though the uni project has come to an end, because it’s fun! I also want to make it more stable and eventually release it under an open-source licence of some kind. There will be an update coming soon, I promise! I now have Internet, so I can write up some things… Anyway, one of the interesting things I wanted to do for Insight was an in-place form of uniq for an array, ideally without any additional memory allocation. It seems that this is something nobody else has done yet! So I set about doing it myself… For those of you who are unfamiliar with the Linux/UNIX command uniq, it takes a sorted list and removes any duplicates. This is almost exactly what I’m trying to do, with one caveat: I need to keep the “discarded” duplicates. What happens is that I have an array containing a number of strings, and these have all been dynamically allocated via malloc() or calloc(). If I just remove or overwrite their pointers, they’ll vanish and cause a memory leak. While I’ve now fixed a large number of leaks thanks to Valgrind, I’m trying to actively avoid any possibility of adding them. Read on for the details… Continue reading “In-place array uniq in C” » July 10th, 2008 | Coding, Facebook, Hacks, Insight (semantic filesystem), Uncategorized | One comment For all that use 4 on Demand, the video-on-demand service for Channel 4 in the UK, I have a useful tip for you. Although it has a large number of programmes available for free, its interface is (to say the least) highly annoying. But there is a fix! Disclaimer: This is non-standard usage of 4od, and while [...] |
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Unless otherwise stated, content is created by Dave Ingram and released under a Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 Unported License |
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