Bill Gates is Satan's Minion
Bill Gates was Satan's minion, is Satan's minion, and always will be Satan's minion.

[/musings] [permanent link]

I Hate People
http://www.wpix.com/news/wpix-dog-beaten-in-elevator,0,193301.story

I saw that on the news last night and it made me sick. There is no reason for this. This is just senseless abuse.

It'd be nice to see him in prison getting kicked around his cell by another inmate, but that likely won't happen. Under the current laws, he can only be charged with a misdemeanor.

Haven't there been studies indicating a correlation between abusing animals and becoming a serial killer?

[/musings] [permanent link]

He's Not Wrong...
Over at Net Meister there's a nice peice entitled Things They Don't Teach You in School". A lot of what Jan has to say is spot-on observation and good advice.

It's definitely worth a read.

[/code] [permanent link]

Looking back...
As I look back at code I wrote a decade ago as an undergrad, I often find lots of little things that can be done better. For instance, in one file I found that reversing the order in which two functions were called would have eliminated a half dozen conditionals from one of the functions and would have resulted in the same expected behavior, but with fewer lines of code and a lower cyclomatic complexity.

[/code] [permanent link]

Thoughts on National Computer Science Education Week
This week is apparently National Computer Science Education Week. Code.org is organizing the "hour of code" to promote teaching of Computer Science and Programming in schools. They're also organizing petitions to make CS courses count as credits in Mathematics or Science for High School graduation requirements.

In High School, my CS courses were by far my favorites, Programming in Pascal, AP Comp Sci in Pascal, Programming in C++, and AP Comp Sci in C++ ( the language for the exam switched my junior year). I learned a lot about structured code, elegant, efficient code. I learned enough about Data Structures and Algorithms that I didn't have to study for my college CS classes until Computational Structures (Discrete Math II with Scheme, essentially) in my third semester. I had an amazing Computer Science teacher who also taught me Calculus and the proper order of precedence in life: God, Family, Math. I wouldn't be where I am today without that educational opportunity I had in High School. I want others to have that opportunity too.

However, this is where I differ with the opinion of the Code.org folks. I do not believe that CS classes should count toward the Math or Science requirements. In this state, CS counts toward the "practical or performing art" requirements, I'm assuming under the "practical" label. I think this is a better place for it at the High School level.

Computer Science is not a hard Science. It's not Physics. It's not Biology. It's not Chemistry. There's a saying that if the subject has science in its name, it's not really a science. That is true with Computer Science. It's not studying the how and why of atoms, of molecules, of living systems, of anything really. It's not science.

Computer Science is really applied mathematics. I am very fortunate that the college program I went through was very strong in mathematics: Calc I and II, Linear (Matrix) Algebra, Discrete Math, Discrete Math II in the guise of Computational Structures, Probability and Statistics, Theory of Computation, Algorithmic Analysis... the list goes on. All of these mathematical foundations were then applied to a machine, to make the machine carry out a task in an efficient manner. It's those mathematical foundations that are the true core of Computer Science.

While mathematics is the core of Computer Science and Computer Science is essentially applied mathematics, I do not believe it should count toward the Math requirements. The CS classes would likely detract from other mathematics courses such as Geometry, Trigonometry, and Calculus. These courses are far too important to an education to be replaced by a Computer Science course. Many, maybe even most, High School Computer Science courses focus more on "programming" than the fundamental mathematical theories. They will pick the language du jour and teach you the syntax and semantics. They'll teach about basic data structures like arrays, and linked lists. The AP exam currently focuses not on implementing lists, trees, stacks, queues, and sorting and searching algorithms, but on arrays and lists using Java library calls. This is not math. This is learning Java syntax.

[/code] [permanent link]

unHide
After a friend's computer became infected with some malware that hides files in your home directory and tries to extort money from you in order to "recover" your data, I was inspired to write this little program.

All it does is search for hidden, non-system files and unhides them. It defaults to the user's home directory (My Documents), but other directories can be chosen.

If anyone wants to try it out, please do. If you do try it, let me know what parts I can do better. I primarily work on embedded systems and Unix daemons professionally; the user only knows my software exists when it isn't working. As such, I have very little experience with GUIs or human-computer interactions. Any feedback would be much appreciated.

The Windows executable can be found at: http://www.skinnymf.com/~mforde/unHide/. Source code is available upon request.

[/code] [permanent link]

Just a Question
Given the following code fragment, I was asked to implement foo such that the program would output "America." How would you do it?

        int main()
        {
          char *p = "Hello";

          foo(         );
          printf("%s",p);

          return 0;
        }

My solution involved allocating new memory from the heap to store the new string, and changing p to point to that buffer. They didn't like that answer. They preferred the method of putting the new string in the data segment as well.

I personally would always avoid that, whenever possible. "Hello" is stored in a read-only area of memory as is "America" in their preferred solution. Any attempt to alter those strings will trigger a segfault. This is an accident waiting to happen.

[/code] [permanent link]

It's not magic, it's C.
I love reading comments like

/* These defined magically in the linker script. */

I found that in the GNU Standard C Library implementation when GCC told me the the variables to which the comment referred were undefined. I guess that linker script isn't magic after all...

[/code] [permanent link]

C#, XNA, and 8 Queens
I spent some time this weekend learning some C# and getting working a bit with the XNA framework. I implemented a solution for the 8 Queens problem in C++, then ported that class to C#. After getting that working in Windows, I started moving it to the Xbox.

It works there with little issue, but, as expected, writing to system.console doesn't produce useful output. My next step is to get some sort of graphical representation of the chessboard displayed with the solution set.

[/code] [permanent link]

XNA
As of this morning, I am now a member of the XNA Creators Club.

[/code] [permanent link]

Self Documenting Code
Despite what you think about your code, it is not self documenting. When writing code add comments, describe what a function does, explain why you're using that convoluted pointer arithmetic and bit shifting. I'm sure it makes sense now, but someday you'll have to go back and look at it and figure out what the hell you were doing. Or worse, I'll have to go back and look at it and figure out what the hell you were doing.

Sometimes it is important to have some sort of separate documentation for the code; maybe some UML or ER diagrams, maybe some English text. Use what ever it takes to explain what you were doing. Do not paste snippets of your code into the text and call it documentation.That is not documentation, that is code.

[/code] [permanent link]

He's Not Wrong...
Over at Net Meister there's a nice peice entitled Things They Don't Teach You in School". A lot of what Jan has to say is spot-on observation and good advice.

It's definitely worth a read.

[/code] [permanent link]

Looking back...
As I look back at code I wrote a decade ago as an undergrad, I often find lots of little things that can be done better. For instance, in one file I found that reversing the order in which two functions were called would have eliminated a half dozen conditionals from one of the functions and would have resulted in the same expected behavior, but with fewer lines of code and a lower cyclomatic complexity.

[/code] [permanent link]

Thoughts on National Computer Science Education Week
This week is apparently National Computer Science Education Week. Code.org is organizing the "hour of code" to promote teaching of Computer Science and Programming in schools. They're also organizing petitions to make CS courses count as credits in Mathematics or Science for High School graduation requirements.

In High School, my CS courses were by far my favorites, Programming in Pascal, AP Comp Sci in Pascal, Programming in C++, and AP Comp Sci in C++ ( the language for the exam switched my junior year). I learned a lot about structured code, elegant, efficient code. I learned enough about Data Structures and Algorithms that I didn't have to study for my college CS classes until Computational Structures (Discrete Math II with Scheme, essentially) in my third semester. I had an amazing Computer Science teacher who also taught me Calculus and the proper order of precedence in life: God, Family, Math. I wouldn't be where I am today without that educational opportunity I had in High School. I want others to have that opportunity too.

However, this is where I differ with the opinion of the Code.org folks. I do not believe that CS classes should count toward the Math or Science requirements. In this state, CS counts toward the "practical or performing art" requirements, I'm assuming under the "practical" label. I think this is a better place for it at the High School level.

Computer Science is not a hard Science. It's not Physics. It's not Biology. It's not Chemistry. There's a saying that if the subject has science in its name, it's not really a science. That is true with Computer Science. It's not studying the how and why of atoms, of molecules, of living systems, of anything really. It's not science.

Computer Science is really applied mathematics. I am very fortunate that the college program I went through was very strong in mathematics: Calc I and II, Linear (Matrix) Algebra, Discrete Math, Discrete Math II in the guise of Computational Structures, Probability and Statistics, Theory of Computation, Algorithmic Analysis... the list goes on. All of these mathematical foundations were then applied to a machine, to make the machine carry out a task in an efficient manner. It's those mathematical foundations that are the true core of Computer Science.

While mathematics is the core of Computer Science and Computer Science is essentially applied mathematics, I do not believe it should count toward the Math requirements. The CS classes would likely detract from other mathematics courses such as Geometry, Trigonometry, and Calculus. These courses are far too important to an education to be replaced by a Computer Science course. Many, maybe even most, High School Computer Science courses focus more on "programming" than the fundamental mathematical theories. They will pick the language du jour and teach you the syntax and semantics. They'll teach about basic data structures like arrays, and linked lists. The AP exam currently focuses not on implementing lists, trees, stacks, queues, and sorting and searching algorithms, but on arrays and lists using Java library calls. This is not math. This is learning Java syntax.

[/code] [permanent link]

unHide
After a friend's computer became infected with some malware that hides files in your home directory and tries to extort money from you in order to "recover" your data, I was inspired to write this little program.

All it does is search for hidden, non-system files and unhides them. It defaults to the user's home directory (My Documents), but other directories can be chosen.

If anyone wants to try it out, please do. If you do try it, let me know what parts I can do better. I primarily work on embedded systems and Unix daemons professionally; the user only knows my software exists when it isn't working. As such, I have very little experience with GUIs or human-computer interactions. Any feedback would be much appreciated.

The Windows executable can be found at: http://www.skinnymf.com/~mforde/unHide/. Source code is available upon request.

[/code] [permanent link]

Just a Question
Given the following code fragment, I was asked to implement foo such that the program would output "America." How would you do it?

        int main()
        {
          char *p = "Hello";

          foo(         );
          printf("%s",p);

          return 0;
        }

My solution involved allocating new memory from the heap to store the new string, and changing p to point to that buffer. They didn't like that answer. They preferred the method of putting the new string in the data segment as well.

I personally would always avoid that, whenever possible. "Hello" is stored in a read-only area of memory as is "America" in their preferred solution. Any attempt to alter those strings will trigger a segfault. This is an accident waiting to happen.

[/code] [permanent link]

It's not magic, it's C.
I love reading comments like

/* These defined magically in the linker script. */

I found that in the GNU Standard C Library implementation when GCC told me the the variables to which the comment referred were undefined. I guess that linker script isn't magic after all...

[/code] [permanent link]

C#, XNA, and 8 Queens
I spent some time this weekend learning some C# and getting working a bit with the XNA framework. I implemented a solution for the 8 Queens problem in C++, then ported that class to C#. After getting that working in Windows, I started moving it to the Xbox.

It works there with little issue, but, as expected, writing to system.console doesn't produce useful output. My next step is to get some sort of graphical representation of the chessboard displayed with the solution set.

[/code] [permanent link]

XNA
As of this morning, I am now a member of the XNA Creators Club.

[/code] [permanent link]

Self Documenting Code
Despite what you think about your code, it is not self documenting. When writing code add comments, describe what a function does, explain why you're using that convoluted pointer arithmetic and bit shifting. I'm sure it makes sense now, but someday you'll have to go back and look at it and figure out what the hell you were doing. Or worse, I'll have to go back and look at it and figure out what the hell you were doing.

Sometimes it is important to have some sort of separate documentation for the code; maybe some UML or ER diagrams, maybe some English text. Use what ever it takes to explain what you were doing. Do not paste snippets of your code into the text and call it documentation.That is not documentation, that is code.

[/code] [permanent link]

Thoughts on National Computer Science Education Week
This week is apparently National Computer Science Education Week. Code.org is organizing the "hour of code" to promote teaching of Computer Science and Programming in schools. They're also organizing petitions to make CS courses count as credits in Mathematics or Science for High School graduation requirements.

In High School, my CS courses were by far my favorites, Programming in Pascal, AP Comp Sci in Pascal, Programming in C++, and AP Comp Sci in C++ ( the language for the exam switched my junior year). I learned a lot about structured code, elegant, efficient code. I learned enough about Data Structures and Algorithms that I didn't have to study for my college CS classes until Computational Structures (Discrete Math II with Scheme, essentially) in my third semester. I had an amazing Computer Science teacher who also taught me Calculus and the proper order of precedence in life: God, Family, Math. I wouldn't be where I am today without that educational opportunity I had in High School. I want others to have that opportunity too.

However, this is where I differ with the opinion of the Code.org folks. I do not believe that CS classes should count toward the Math or Science requirements. In this state, CS counts toward the "practical or performing art" requirements, I'm assuming under the "practical" label. I think this is a better place for it at the High School level.

Computer Science is not a hard Science. It's not Physics. It's not Biology. It's not Chemistry. There's a saying that if the subject has science in its name, it's not really a science. That is true with Computer Science. It's not studying the how and why of atoms, of molecules, of living systems, of anything really. It's not science.

Computer Science is really applied mathematics. I am very fortunate that the college program I went through was very strong in mathematics: Calc I and II, Linear (Matrix) Algebra, Discrete Math, Discrete Math II in the guise of Computational Structures, Probability and Statistics, Theory of Computation, Algorithmic Analysis... the list goes on. All of these mathematical foundations were then applied to a machine, to make the machine carry out a task in an efficient manner. It's those mathematical foundations that are the true core of Computer Science.

While mathematics is the core of Computer Science and Computer Science is essentially applied mathematics, I do not believe it should count toward the Math requirements. The CS classes would likely detract from other mathematics courses such as Geometry, Trigonometry, and Calculus. These courses are far too important to an education to be replaced by a Computer Science course. Many, maybe even most, High School Computer Science courses focus more on "programming" than the fundamental mathematical theories. They will pick the language du jour and teach you the syntax and semantics. They'll teach about basic data structures like arrays, and linked lists. The AP exam currently focuses not on implementing lists, trees, stacks, queues, and sorting and searching algorithms, but on arrays and lists using Java library calls. This is not math. This is learning Java syntax.

[/code] [permanent link]

Normalcy
I realized that if and when I have children, they will grow up thinking it's normal to have a DeLorean.

[/dmc] [permanent link]

... On man pages, a mini-rant
I really despise the linux man pages. They're useless at best and wrong at worst.

From the man page for setsockopt: "The include file <sys/socket.h> contains definitions for socket level options, described below."

1) The options are not "described below."
2) No, that file actually doesn't contain those definitions.

On the other hand... The FreeBSD man page for setsockopt does actually describe the options and under FreeBSD the <sys/socket.h> file does indeed contain the definitions.

[/unix] [permanent link]

[mini-rant]
I hate bash. I hate it. I hate how it bastardized bourne by adding half-assed implementations of features from ksh and tcsh.

[/unix] [permanent link]

Problems with loader.conf

First the background. The story of how I got into this mess:

I'm trying to get ACPI working on my laptop under FreeBSD. Specifically, I'm trying to get Resume to work properly. Suspend works, and resume seems to partially work. The fans spin up, the keyboard's backlight comes back on, but no screen. And without video, it's a little hard to figure out what's going on.

ACPI works great on my server. It's running the same FreeBSD 9.1 x86-64 build that the laptop is, but the biggest difference is that it's an intel motherboard. The laptop is an Alienware, for our purposes, I might as well just call it a Dell.

I started comparing the ASL output from both machines and noticed some things. First, the Alienware's ACPI implementation looks for the OS to be various forms of Windows or "Linux." The intel ACPI implementation also looks for these Windows variants and "Linux" but it has an additional OS string. It has an entry for "FreeBSD."

I figured the easiest next step was to use iasl co compile the intel ASL source and load that DSDT onto the laptop.

I calculated the odds it would work vs the odds I was doing something incredibly stupid... and I went ahead and did it anyway...

I compiled the asl and I set /boot/loader.conf to override the DSDT with the intel one I had just compiled and I rebooted. At first everything was good. The machine went down, I got the boot loader, and the FreeBSD kernel started to load. Seconds into the kernel load, it rebooted itself. After the second time, I powered off and tried a cold boot. Same problem just as I had feared.

Now i was in a situation where I couldn't successfully boot because of an error in loader.conf I needed to find a way to edit it.

And here's the solution:

The FreeBSD bootloader, like many others, works in stages. At a certain point, it can be interrupted at which point it provides a set of simple yet powerful commands to control various aspects of the loading process. If you still have that default menu at load, I beleive the option to chose is 6. I disable that menu so during a brief countdown I hit escape before the boot loader turns control over to the kernel.

Once in the boot loader prompt, I entered the following commands:

unload
load kernel
boot

Pretty simple right? The unload command does what it says, it unloads the kernel and any modules loader.conf had pulled into memory. The load kernel command grabs the kernel and loads it into memory... but only the kernel thus ignoring the broken DSDT in loader.conf. And of course boot tells the boot loader to continue booting the system.

Once booted, I removed the bad DSDT from loader.conf.

[/unix] [permanent link]

[/musings] [permanent link]

1381017534
Good night, demonslayers.

==================================================================
This mobile text message is brought to you by AT&T

[/mobile] [permanent link]

1381006292
--_CEEC49CB-DE1D-4A1E-9DFE-114E3B54D3CB_
Content-Transfer-Encoding: quoted-printable
Content-Type: text/plain; charset="Windows-1252"

Test blog

Sent from my Windows Phone=

--_CEEC49CB-DE1D-4A1E-9DFE-114E3B54D3CB_
Content-Transfer-Encoding: quoted-printable
Content-Type: text/html; charset="Windows-1252"


pe>

=

--_CEEC49CB-DE1D-4A1E-9DFE-114E3B54D3CB_--

[/mobile] [permanent link]

1381005175
Corning is a quaint little town. Looking forward to exploring.

==================================================================
This mobile text message is brought to you by AT&T

[/mobile] [permanent link]

1380987012
test
test

[/mobile] [permanent link]

chafing...
WARNING: possible TMI

I thought I had healed from the chafing left after Saturday's River to Sea Relay... Until I ran in the rain yesterday. To quote a friend, "It feels like someone took a cheese grater to my crotch."

[/running] [permanent link]

Why do I run?
So, why do I run? Here's one reason:

[/running] [permanent link]

Windows 8.1 in Virtual Box
I was attempting to run the Windows 8.1 Preview in a VM using Sun's Oracle's Virtual Box on a Windows 7 host. I ran into a minor problem.

The OS wouldn't boot. I received an error stating:

Your computer needs to restart. Please hold down the power button. Error Code: 0x000000C4 Parameters: [redacted]

Looking for the error code online led me to this article describing the issue and a fix. The key to fixing this was running the command:

"c:\Program Files\Oracle\VirtualBox\VBoxManage.exe" setextradata "" VBoxInternal/CPUM/CMPXCHG16B 1

The CMPXCHG16B is an instruction in 64-bit X86 processors that allows for atomic operations on octal words.

[/musings] [permanent link]

Excluding directories while using pax(1)
My primary disk is failing. There are large segments that are generating low level IO errors during read or write operations. Most of the files written to the bad area were under /usr/ports/ where the FreeBSD Ports collection is installed. A few files were under the web server's root.

Figuring I'd take care of things prior to the disk actually failing to the point of it being irrecoverable, I purchased a new disk early. I installed it, partitioned it, and formatted it.

To copy the data over, ignoring the areas that were causing the IO errors, I used mv to "move" the files from the web root under /usr/ports and used the following command as root:

pax -rwvpe -s':/usr/ports/.*::gp' -X / /mnt/newdisk/

The -X prevents pax from traversing into mount points that have a different device ID than the one on which it was started. This prevents an infinitely recursive loop from happening when the new disk's mount point would have been hit. It also prevents data on the non-failing disks from being copied as well.
the -s option allows for sed search and replace scripts to be run. In this example, the : is used as the delimiter and any path matching /usr/ports/* is replaced by a null string. With this replacement all directories under /usr/ports are excluded from the copy.

[/unix] [permanent link]

Senator Elbert Guillory
Elbert Guillory, a state senator in Louisiana, has switched his party affiliation from Democrat to Republican. This website has a short commentary on the matter, as well as an embedded video of Senator Guillory explaining his decision.

[/politics] [permanent link]

I LOL'ed

PATIENT: "The problem is that obesity runs in my family."
DOCTOR: "No, the problem is that no one runs in your family."

[/running] [permanent link]

World Autism Day

[/musings] [permanent link]