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  • What is "urgent data"?

    - by timn
    The man page of epoll_ctl() says about EPOLLPRI: There is urgent data available for read(2) operations. How exactly is "urgent data" defined and who decides which data has priority?

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  • Allowed characters in linux environment variable names

    - by Christian Semrau
    What characters are allowed in linux environment variable names? My cursory search of man pages and the web did only produce information about how to work with variables, but not which names are allowed. I have a Java program that requires an defined environment variable containing a dot, like com.example.fancyproperty. With Windows I can set that variable, but I had no luck setting it in linux (tried in SuSE and Ubuntu). Is that variable name even allowed?

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  • Cheapest SSL certificates

    - by Aaron Maenpaa
    I'm looking for cheap SSL certs for running a personal website over https without triggering Firefox's "you may be facing a man-in-the-middle-attack" response that self signed certs provoke. Nothing particularly fancy, no EV, etc. Any recommendations/where do you get your certificates from?

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  • getopt implicit declaration in Solaris?

    - by Steven
    In Solaris, gcc gives me implicit declaration of function `getopt' when compiling #include <unistd.h> #include <stdlib.h> int main(int argc, char *argv[]) { getopt(1,argv,""); return 0; } The man page for getopt says something about including unistd.h or stdio.h, however even though I'm inluding both I still get this warning. Is this normal? Is using functions that aren't explicitly declared common in Unix development?

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  • Is there a way to use rsync and exclude files greater than a certain size?

    - by milesmeow
    I've checked out the man pages and did some searching but can't find info on ways to have rsync skip files greater than a certain size. We're doing rsync to an offline location and when someone puts a hug video file, the rsync jobs run into work hours. I've looked at the 'exclude' syntax and didn't see anything for excluding based on file size. Can I do it with rsync or should I look for other offline synching alternatives?

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  • clear command in my mac os terminal gives the following error

    - by sil
    dyld: Library not loaded: /opt/local/lib/libncursesw.5.dylib Referenced from: /opt/local/bin/clear Reason: image not found Trace/BPT trap This is what my bash_login looks like: export PATH="/usr/local/bin:/usr/local/sbin:/usr/local/mysql/bin:$PATH" export PATH="/usr/local/apache-maven-2.2.1/bin:$PATH" export PATH="~/.gem/ruby/1.8/bin:$PATH" export PATH="/usr/local/mysql/bin:$PATH" export PATH="/System/Library/Frameworks/JavaVM.framework/Versions/1.6/Home/bin:$PATH" export PATH=/opt/local/bin:/opt/local/sbin:$PATH export MANPATH=/opt/local/share/man:$MANPATH

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  • Question on gcc compiler commands

    - by user271916
    I had to compile a small little C program using the following; gcc sine.c -o sine -lm I needed the "-lm" because the program included the math.h. In looking this up under compiler commands man shows it a either -llibrary or -l library. I could not find any information on what other libraries. Apparently -lm is needed for math.h what other library commands might be needed. Thanks

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  • Example of xargs' -x option in action

    - by Ole Tange
    GNU xargs has option '-x'. The man page says: -x Exit if the size (see the -s option) is exceeded. But xargs seems to not care if -x is set or not. I have been unable to make an example in which the -x has any effect at all. Please provide two examples in which the only difference is an added -x and that produce different output.

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  • Why use an event cache with epoll_wait?

    - by user1827356
    Question: epoll man page has some pointers when using epoll with an 'event cache'. But, why would you need to maintain an event cahce at all - Isn't this the same as what epoll is supposed to be doing? Is it to avoid making multiple epoll_wait calls which might be slower than managing the events in user space? Is it to implement a custom 'priority' scheme over the cached events? Background: I'm trying to understand the strengths/shortcomings of epoll and its applicability to different situations

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  • how to return NULL for double function with Intel C compiler?

    - by Derek
    I have some code that I am porting from an SGI system using the MIPS compiler. It has functions that are declared to have double return type. If the function can't find the right double, those functions return "NULL" The intel C compiler does not like this, but I was trying to see if there is a compiler option to enable this "feature" so that I can compile without changing code. I checked the man page, and can't seem to find it. Thanks

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  • patterns in case statement in bash scripting

    - by Ramiro Rela
    The man says that case statements use "filename expansion pattern matching". I usually want to have short names for some parameters, so I go: case $1 in req|reqs|requirements) TASK="Functional Requirements";; met|meet|meetings) TASK="Meetings with the client";; esac logTimeSpentIn "$TASK" I tried patterns like "req*" or "me{e,}t" which I understand would expand correctly to match those values in the context of filename expansion, but it doesn't work. Thanks.

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  • JavaScript: Container with draggable. Constrain draggable to a circle shape, in container.

    - by ritsuke
    Hey guys, I'm looking for a simple solution to place a draggable element inside of a box container. When the user begins to interact with the draggable, the draggable element should remain constrained to a circular shape, within the container. At a complete loss as to how I should accomplish this. Thank you! :-) Additional: Box container would be 100 pixels wide and tall Draggable would be 20 pixels wide and tall http://tool-man.org/examples/dragging.html This is on the TODO list, but of course this site is no longer maintained

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  • Replace BIT values with some text

    - by nihi_l_ist
    I have a BIT column with gender (0,1) and want to replace 0 and 1 in the resulting view with the words "man" and "woman". Can i do this right in the view with some system finction or i have to write my own function to do that?

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  • image processing problem

    - by riyana
    i'm working on detecting shape of any object.i've a binary image where background is white pixels and foreground/object is black pixel. now i need to detect the shape of the area where there are black pixels.how can i do it?the shape may be of a man/car/box etc. plz help

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  • Solving the magical footer issue

    - by MasterLee
    If you have a quick look at this website that I am designing: http://miladalami.com The blackline seen in the footer is the one that I want to fix. Is there anyway that I can put that footer at the bottom of the content (wrapper) of the page? I have not done any webdesigning since the golden days of tables so CSS is quite new to me. Anyone that could assist this old man? Please be specific in any reply as I am new to CSS styling...

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  • Ask the Readers: Do You Use the Command Line?

    - by Asian Angel
    Most people have heard of it but not everyone is familiar or comfortable with how to use this bastion of geekdom. This week we would like to know if you use the command line or not. The command line…the bastion of ultimate geekery in many peoples’ eyes. You often hear people referring to doing things using the command line, so there must be something to it, right? For some people using the command line is the best, most efficient, and easiest way to do things on their systems. These are the people that many of us wish we were like. Next you have those who are proficient at using the command line but do not rely on it for everything they do on their systems. Then there are people who know how to perform some tasks or hacks using the command line but may not be as comfortable or knowledgeable as they wish to be using it. Moving on you find those who are interested in learning how to use the command line and just need a small push to get started.  Perhaps you feel too intimidated to learn it and just need the right opportunity to come along. And maybe you do not care one way or the other so long as you get done what you want to do on your system. Or you may prefer to simply use a graphical interface since that is quicker and easier for you (along with being familiar). You can find the whole range of people when it comes to using the command line… This week we would like to know if you use the command line or not. What command line category do you fit into? Power user? Casual usage? Totally lost? Let us know in the comments! How-To Geek Polls require Javascript. Please Click Here to View the Poll. Latest Features How-To Geek ETC The How-To Geek Holiday Gift Guide (Geeky Stuff We Like) LCD? LED? Plasma? The How-To Geek Guide to HDTV Technology The How-To Geek Guide to Learning Photoshop, Part 8: Filters Improve Digital Photography by Calibrating Your Monitor Our Favorite Tech: What We’re Thankful For at How-To Geek The How-To Geek Guide to Learning Photoshop, Part 7: Design and Typography Fun and Colorful Firefox Theme for Windows 7 Happy Snow Bears Theme for Chrome and Iron [Holiday] Download Full Command and Conquer: Tiberian Sun Game for Free Scorched Cometary Planet Wallpaper Quick Fix: Add the RSS Button Back to the Firefox Awesome Bar Dropbox Desktop Client 1.0.0 RC for Windows, Linux, and Mac Released

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  • Developer’s Life – Every Developer is a Captain America

    - by Pinal Dave
    Captain America was first created as a comic book character in the 1940’s as a way to boost morale during World War II.  Aimed at a children’s audience, his legacy faded away when the war ended.  However, he has recently has a major reboot to become a popular movie character that deals with modern issues. When Captain America was first written, there was no such thing as a developer, programmer or a computer (the way we think of them, anyway).  Despite these limitations, I think there are still a lot of ways that modern Captain America is like modern developers. So how are developers like Captain America? Well, read on my list of reasons. Take on Big Projects Captain America isn’t afraid to take on big projects – and takes responsibility when the project is co-opted by the evil organization HYDRA.  Developers may not have super villains out there corrupting their work, but they know to keep on top of their projects and own what they do. Elderly Wisdom Steve Rogers, Captain America’s alter ego, was frozen in ice for decades, and brought back to life to solve problems. Developers can learn from this by respecting the opinions of their elders – technology is an ever-changing market, but the old-timers still have a few tricks up their sleeves! Don’t be Afraid of Change Don’t be afraid of change.  Captain America woke up to find the world he was accustomed to is now completely different.  He might have even felt his skills were no longer necessary.  He, and developers, know that everyone has their place in a team, though.  If you try your best, you will make it work. Fight Your Own Battle Sometimes you have to make it on your own.  Captain America is an integral part of the Avengers, but in his own movies, the other superheroes aren’t around to back him up.  Developers, too, must learn to work both within and with out a team. Solid Integrity One of Captain America’s greatest qualities is his integrity.  His determine to do what is right, keep his word, and act honestly earns him mockery from some of the less-savory characters – even “good guys” like Iron Man.  Developers, and everyone else, need to develop the strength of character to keep their integrity.  No matter your walk of life, there will be tempting obstacles.  Think of Captain America, and say “no.” There is a lot for all of us to learn from Captain America, to take away in our own lives, and admire in those who display it – I am specifically thinking of developers.  If you are enjoying this series as much as I am, please let me know who else you would like to see featured. Reference: Pinal Dave (http://blog.sqlauthority.com)Filed under: PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, T SQL Tagged: Developer, Superhero

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  • Desktop Fun: Merry Christmas Fonts

    - by Asian Angel
    Christmas will soon be here and there are lots of cards, invitations, gift tags, photos, and more to prepare beforehand. To help you get ready we have gathered together a great collection of fun holiday fonts to help turn those ordinary looking holiday items into extraordinary looking ones. Note: To manage the fonts on your Windows 7, Vista, & XP systems see our article here. Oldchristmas Download Holly Download Christmas Flakes *includes two font types Download Frosty Download Kingthings Christmas Download Candy Time Download BodieMF Holly Download Snowfall Download Snowflake Letters Download Hultog Snowdrift Download AlphaShapes Xmas Trees Download Christmas Tree Download PF Wreath Download Snowy Caps Download PF Snowman *includes three font types Note: Shown in all capital letters here. Download BJF Holly Bells Download Christbaumkugeln Download Xmas Lights Download XmasDings *includes 62 individual characters Note: This group represents A – Z in all capital letters. Note: This group represents A – Z in all lower case letters. Note: This group represents the numbers 0 – 9. Download WWFlakes *includes 62 individual characters Note: This group represents A – Z in all capital letters. Note: This group represents A – Z in all lower case letters. Note: This group represents the numbers 0 – 9. Download For Christmas Card creating fun and a great way to use your new fonts see our MS Word Christmas Card project series here. Design and Print Your Own Christmas Cards in MS Word, Part 1 Design and Print Your Own Christmas Cards in MS Word, Part 2: How to Print Want more great ways to customize your computer? Then be certain to look through our Desktop Fun section. Latest Features How-To Geek ETC The How-To Geek Holiday Gift Guide (Geeky Stuff We Like) LCD? LED? Plasma? The How-To Geek Guide to HDTV Technology The How-To Geek Guide to Learning Photoshop, Part 8: Filters Improve Digital Photography by Calibrating Your Monitor Our Favorite Tech: What We’re Thankful For at How-To Geek The How-To Geek Guide to Learning Photoshop, Part 7: Design and Typography Happy Snow Bears Theme for Chrome and Iron [Holiday] Download Full Command and Conquer: Tiberian Sun Game for Free Scorched Cometary Planet Wallpaper Quick Fix: Add the RSS Button Back to the Firefox Awesome Bar Dropbox Desktop Client 1.0.0 RC for Windows, Linux, and Mac Released Hang in There Scrat! – Ice Age Wallpaper

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