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C Standard Error Codes


The perror function is infinitely useful when dealing with errno (but sadly renders the point of this huge table mute). By setting a conditional breakpoint you can catch specific errors too. it's more popular so it will be easier to understand, maintain share|improve this answer answered Dec 22 '08 at 11:09 Klesk 33659 add a comment| up vote 3 down vote I Copy (only copy, not cutting) in Nano? Source

On failure it also sets errno, an external global integer to indicate which failure occurred. If you get this error, you might want to increase the RLIMIT_NOFILE limit or make it unlimited; see Limits on Resources. My focus is to write articles that will either teach you or help you resolve a problem. Macro: int EPIPE Broken pipe; there is no process reading from the other end of a pipe.

Standard Error Codes Linux

The completion code usually is used only once, just after the call, whereas "real" data returned from the call may be used more often share|improve this answer answered Dec 22 '08 From this errno variable you can use some error handling functions to find out the error description and handle it appropriately. Macro: int EDEADLK Deadlock avoided; allocating a system resource would have resulted in a deadlock situation. How do you get a wedding dress in Skyrim?

And since they are referring to the error number through the #define it's not that big of a change. Docs are worthless like this. –Someone Somewhere Sep 2 '11 at 5:52 4 @SomeoneSomewhere That's a feature, not a bug. Macro: int EFAULT Bad address; an invalid pointer was detected. Http Standard Error Codes See Socket Addresses.

Such shortages are usually fairly serious and affect the whole system, so usually an interactive program should report the error to the user and return to its command loop. American Standard Error Codes Repairing this condition usually requires unmounting, possibly repairing and remounting the file system. The GNU C Library (glibc). http://www.gnu.org/s/libc/manual/html_node/Error-Codes.html Macro: int ENODEV The wrong type of device was given to a function that expects a particular sort of device.

Trying the same operation again will block until some external condition makes it possible to read, write, or connect (whatever the operation). Rest Standard Error Codes int i = 0; if ( (i = setjmp(x)) == 0 )// try{ { f(); } // } --> end of try{ else // catch(i){ { switch( i ) { case 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. Digging a Hole and Creating EM Radiation What's an easy way of making my luggage unique, so that it's easy to spot on the luggage carousel?

American Standard Error Codes

Macro: int EOPNOTSUPP The operation you requested is not supported. browse this site Macro: int ENETDOWN A socket operation failed because the network was down. Standard Error Codes Linux By the way, errno is not always a variable. American Standard Thermostat Error Codes In BSD and GNU, the number of open files is controlled by a resource limit that can usually be increased.

you have a parser error and want to provide line number and column of the syntax error and a way to print it all nicely. –panzi Oct 20 '13 at 23:44 this contact form In your getSize() example I'd consider that sizes must always be zero or positive, so returning a negative result can indicate an error, much like UNIX system calls do. The system cannot allocate more virtual memory because its capacity is full. Macro: int EINTR Interrupted function call; an asynchronous signal occurred and prevented completion of the call. American Standard Furnace Error Codes

This outgoing parameter thing are used for cases where you would normally throw an exception. Macro: int ENOTSUP Not supported. This condition never arises on GNU/Hurd systems. http://iembra.org/error-code/cal-spa-oh-error-codes.php Subtracting matrices of the same dimension, how to make them align?

Macro: int EWOULDBLOCK In the GNU C Library, this is another name for EAGAIN (above). Corsa C Error Codes Retrieved 2013-09-12. ^ errno.h:system error numbers–Base Definitions Reference, The Single UNIX® Specification, Issue 7 from The Open Group ^ "Error numbers - cppreference.com". Library functions store only values greater than zero.

Can you give a quick example? –paranoidcoder Jun 18 '13 at 9:57 @crypticcoder Simply said: a global error callback can be invoked in whatever thread context.

For instance, open will return the file descriptor on success or -1 on failure. On Ubuntu: apt-get install errno. You have to include errno.h header file to use external variable errno. 500 Error Code Macro: int EPROCUNAVAIL ???

Macro: int ENFILE There are too many distinct file openings in the entire system. If I can't, I send a SIGURG to the exception thread, which stops the program gracefully. I'm curious about your reasoning on asserts. Check This Out Follow us on Google+ Follow us on Twitter Become a fan on Facebook Support Us Support this blog by purchasing one of my ebooks.

Instead, they return EINPROGRESS to indicate that the operation has begun and will take some time. By setting a data breakpoint on the error variable, you can catch where does the error occurred first. The way I do this is to have a customised assert that still gets compiled in at release but only gets fired when the software is in diagnostics mode, with an I want a perror() that prints the MACRO name so I can look up the bloody error in the man page! –DarwinSurvivor Feb 24 '13 at 1:45 add a comment| up

This applies to function and argument naming, argument ordering and error handling. This error never occurs on GNU/Hurd systems. See Connecting.