Syndicate content

search

Installing Solaris to compile your software

Now a day I like to install Solaris to check that my code compiles and generally runs under that OS.

I think that's a good way to prove that the code is multi-OS ready even if it is only for Unices.

OpenSolaris is free and can be downloaded from Oracle. The last URL I use was:

http://www.oracle.com/technetwork/server-storage/solaris11/downloads/index.html

The system, by default, comes with a directory named /usr/sfw which includes a really old version of gcc. It is possible, though, to move forward with a newer version of the compiler by installing a package. Under Solaris 11.2, this ...

Console color: dark blue on black unreadable

As I work in consoles every now and then, I run in that one problem:

Some text is written in Dark Blue over the Black background:

This is a good example of what I'm talking about.

And if you can read that text, wow! (without selecting it first.

So... how could you change the color of that blue to make it readable? There is a way by sending some escape command to the console:

echo -e "\\e]R\\e]PC6495ed"

That command changes the color of the blue to a light blue (somewhat "cyan", although not light cyan.)

The "\\e]R" part is to reset the colors to ...

Readonly content cannot be changed. Libreoffice preventing edits...

Today I opened a document where I had to make a few edits and LibreOffice decided to tell me:

Readonly content cannot be changed.
No modifications will be accepted.

There is a screenshot of that message:

Error message: Readonly content cannot be changed. No modifications will be accepted.

The error may be justified, I do not know, but apparently not too many people know how to unlock a document. I found pages and pages that tell people to check the read/write protection of the file, as if a read-only file on disk could not be updated in the editor... (yes! you cannot write it back, but you can edit it and do a Save As ...)

One person, though, had the correct answer to ...

Strange VC error: No files were found to look in. Find was stopped in progress.

Strangest thing happened to me today! I'm working on a project with VC 2005 (yeah! pretty old version for 2012, I know!)

I use the Search in files which usually works great but today I got this strange error:

No files were found to look in. Find was stopped in progress.

And no real reason why it would say that!?

Searched on the Internet and found a page mentioning the problem (here.)

When searching it is possible to stop the process with Ctrl-C or Break or, it seems, Ctrl-Scroll Lock.

In my case my bag was a bit on the keyboard pressing on one or more of those keys! Moving my bag was ...

jQuery and hidden IFRAME bug

In the last 3 days I've been working on a new page and ran in some strange problem. There was an error in the console but things seemed to otherwise work just fine so I ignored it (since it wasn't in my own code...)

That error was an unhandled jQuery error which resulted in "let's stop the JavaScript at once." This meant all the page initialization failed (or did not occur.) The code was there otherwise. What give?!

The script in question was loaded from a hidden IFRAME, something like this:

  <div style="display: none;">
    <iframe ...

Multi-level lists in MS-Word... The new way!?

Okay, it has been a little while now, but each time I just have to search forever to find out how to create a multi-level numbering list.

By default, a list will appear as this:

1. Chapter

    1. Section

        1. Sub-Section

Which may work for you, but in many cases you want to have all the list numbers appearing in your section and sub-sections as in:

1. Chapter

    1.1 Section

        1.1.1 Sub-Section

Okay, so that in itself it actually very easy, but it used to be that you could ...

QtWarning QMetaObject::connectSlotsByName: No matching signal for on_something_event()

Today I noticed that I was getting this warning while running one of my tests1:

   QtWarning QMetaObject::connectSlotsByName: No matching signal for on_something_event()

Search with Google I found a post that explained, very clearly, what happens. I'd bet it's somewhere in the documentation of Qt, but so far I have not found anything about that in ...

  • 1. I had not noticed before... Unfortunately, you get a s**t load of output under the Windows IDE about the loading of DLLs which no one really cares about and that often blurs your view of other much more important messages!

Restore Firefox warnings when viewing non-secure data on a secure page

One thing that I quickly do on my browsers is turn off warnings about non-secure data when browsing secure pages (with HTTPS .)

It's rarely a problem and with all those features you like to have (Facebook, Twitter, AddThis, ShareThis, Google Plus, and othe fun widgets...) it's hard to avoid. Actually, many times the problem lies in one of these scripts and thus you cannot just fix your website. Without that 3rd party script owner fixing their code, it just won't work at all.

Now, once in a while I work on a customer website and they really want to have a 100% clean slate. Thus,

JavaScript and undefined variables

As I create website, I often deal with JavaScript code. At times, a variable doesn't make it for different reasons, for instance a part is missing and thus the variable generation doesn't happen. If then the script uses that undefined variable, then it generates an error. In some cases, it may not matter too much. However, when the variable that doesn't exist is hit, the JavaScript interpreter generates an exception and stops the execution of the script altogether (unless you capture the exceptions... Do you do that?!)

The solution is to test the variable and since I always have to search how

Attack by Bots

Since the ZmEu attack, I've been watching my logs a little closer. I also found a page that I could not read (but Google could and was kind enough to provide a cached version.) That page listed many bots that are not nice bots. So? I decided to block some of them, especially those that use very bad URLs or load many pages too quickly.

The result is that I'm getting more and IP addresses in my firewall. Although they get removed in a schedule that I will not state here, I can tell you that each time I block tenth when not hundredth of useless hits (worst than that at times those could be

Syndicate content Syndicate content

     

Terms of Site Index

Find the page/content you are looking for with our index.

  • Hedgehog
  • lock

    A lock is used to limit the use of shared resources in different ways. When only using the data in read mode, the lock will prevent modifications, but any number of threads and processes can access the data. When in write mode, then only the owner can access the data.

  • policy
  • registration
  • samba