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Programming Error Codes

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How long should the cake stay in the oven? An exception can leave you in this intermediate state. As for throwing exception on non-existing files. For logging, just give your exceptions descriptive names, and log the name. get redirected here

Macro: int EPFNOSUPPORT The socket communications protocol family you requested is not supported. Portability Note: In many older Unix systems, this condition was indicated by EWOULDBLOCK, which was a distinct error code different from EAGAIN. Interestingly, in low level programming, error handlers are much more commonly used. #25 Yossi Kreinin on 09.24.12 at 9:11 am @JS: restarts?! Macro: int EBACKGROUND On GNU/Hurd systems, servers supporting the term protocol return this error for certain operations when the caller is not in the foreground process group of the terminal.

Error Code Linux

Macro: int EDOM Domain error; used by mathematical functions when an argument value does not fall into the domain over which the function is defined. Macro: int EPROGMISMATCH ??? I wonder, how many C#-developers are out there not not wrapping the Connection into a using-clause enforcing the call to IDisposable.Dispose!? But the ultimate solution has to be testing.

  1. What I've been (unconsciously) doing is dividing work into setup->execute phases and paying very close attention to what can be thrown during a setup phase.
  2. Simple example: If you fail to check a pointer (in C/C++) that is result of a function and dereference it without testing, your application might crash and will be gone, without
  3. C++ has RAII for the gate-closing (and Python has with and C# has using), and Java has checked exceptions for the exception-hunting.
  4. But if the application silently dies, your buffer might swallow the most recent events, which are usually the most informative pieces of information. #36 Lawrence Knowlton on 09.26.12 at 7:59 am
  5. Maybe add a leading 'E' to make them clearly identifiable for users (especially useful when the support desk has to instruct users how to spot the error code).
  6. When programming, don't get trapped into think about the little picture.
  7. Let the Bastard handle it!
  8. So you use them only for programmer errors, which you can't fix by using error codes anyway.
  9. Please add details to narrow the answer set or to isolate an issue that can be answered in a few paragraphs.
  10. But this is actually the first one I've ever seen.

Macro: int EACCES Permission denied; the file permissions do not allow the attempted operation. The values are always the same, on every operating system. It almost feels like exceptions with an error code might be a way out ;-) #6 Ivan Tikhonov on 09.24.12 at 4:24 am Making it more declarative places problem into a What Is Error Code -50 So you may decide error strategy in the error handler, but handle the error at the place it occurred (for example by retrying).

So there is one errno for each thread. This error means you got lucky and the system noticed; it might just hang. If you find that while using exceptions your code gets run down with them and bloated by exception based classes you, once again, don't fully understand exceptions and how to use try this What do your base stats do for your character other than set your modifiers?

If the user sees a 404, and reports it to support, they will look in the logs for the details of what was going on, which page was visited, when, and Error Code Http Higher level, simpler and cleaner. Subroutine call, if and loop are the only control structures (in imperative langiages). #48 Jussi Santti on 10.01.12 at 9:13 am "EXCEPTIONS are no program flow cotrol structures". #49 Uri W What is summer in Spanish? "Estío" vs "verano" Counterintuitive polarizing filters Is 7.5 hours between flights in Abu Dhabi enough to visit the city?

Error Code Mac

Macro: int ENOMEM No memory available. http://www.thegeekstuff.com/2010/10/linux-error-codes My compiler is not safety-critical because you can always recompile and you can work around its bugs because there's a testing infrastructure looking for said bugs. Error Code Linux And it's not easy to wrap every entrance into an intermediate state using whatever exception-safety-wrapper your language gives you. Error Code Google Play Moving On - Old / New Ideas If you don't mind it being a C++ article, here is an amazing one from Andrei Alexandrescu and Petru Marginean. (Andrei is widely known

In typical fashion, I tried to optimize the error handling problem rather than just do the right thing, and just use error codes. Get More Info The question is if it's equally awful if you do quit - compared to the case of just ignoring an error code and not quitting. #23 Yossi Kreinin on 09.24.12 at All they needed to do to fix it was to have tried actually using the old code in the new environment before they actually set it on top of thousands of A lot of these errors are just pawns in the grand scheme of assuring that you have all of your resources in place before you begin your task at hand. Error Code Android

Graham & Coase: when big companies are a good idea Engineers vs managers: economics vs business SIMD < SIMT < SMT: parallelism in NVIDIA GPUs An unusual hardware architecture: APA (Associative Macro: int ERANGE Range error; used by mathematical functions when the result value is not representable because of overflow or underflow. df -h doesn't show /dev/sda A completely overkill BrainFuck lexer/parser Expectation of a geometric brownian motion Simplify definition of a dictionary with default return value What does the word "most" mean? useful reference Macro: int ENETDOWN A socket operation failed because the network was down.

With exceptions, it's easier for the programmer to figure out why this garbage appeared, because the failure occurs closer to the point of the error. How To Fix Error Code The Common Lisp and Smalltalk ones are similar. This indicates an internal confusion in the file system which is due to file system rearrangements on the server host for NFS file systems or corruption in other file systems.

Macro: int ENOSPC No space left on device; write operation on a file failed because the disk is full.

Often using a debugger to run a program is considered having it open for writing and will cause this error. (The name stands for “text file busy”.) This is not an Exceptions by Damien Katz. I cannot say a similar thing about user-triggered exceptions, because obviously there are some in correct code; so now it's a question of who calls who. Windows Error Codes Lookup Macro: int ENOEXEC Invalid executable file format.

They reserve distinct ranges for different types of statuses/errors. I think of this as an example of an "explicit is better than implicit" motto - a Python's motto, ironically, Python being the exception-centric language that I use the most these share|improve this answer answered Feb 7 '12 at 21:47 Per Johansson 23127 fantastic detail, thank you. this page Some socket functions don’t make sense for all types of sockets, and others may not be implemented for all communications protocols.

See Socket Options. err = f.openfile( filename ) if err == OK then // Normal processing elseif err == filenotexist then // … elseif err == accessnotallowed then // … else // Something we up vote 5 down vote You should check out how error/status codes are organized in common protocols such as HTTP.