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Unix Error Codes Einval


This often indicates a cycle of symbolic links. Luckily, most functions will only have a few possible errors to report, so it's usually not that hard to handle them appropriately.Back to topDealing with errorsAdding error-handling code to your program Hilbert-irreducible Banach space Magic Item Distribution? Thus, your program will never actually see EPIPE unless it has handled or blocked SIGPIPE. have a peek here

When he's not playing with his son Alex or hanging out with his wife Lynette, Chris spends his spare time designing, writing, and researching (that is, playing) video games. 05 September Developers often hate doing it.But, you're not doing it for yourself, you're doing it for the people who are going to actually use your program. more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed What would have happened to the world if the sepoy mutiny of 1857 had suceeded? Discover More

Linux Errno Codes

C libraries in many older Unix systems have EWOULDBLOCK as a separate error code. 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. If a reading process checks for this, and there isn't any, it get EINVAL. Macro: int ENFILE There are too many distinct file openings in the entire system.

  1. Macro: int ED The experienced user will know what is wrong.
  2. fork can return this error.
  3. You must tell accept() how big the buffer for the address is.
  4. This article might be a handy reference for you, when you encounter an error number and you would like to know what it means.
  5. In C programming language, there is an external variable called "errno".
  6. An attempt to read from a stream that is closed will return EIO, as will a disk read or write that is outside of the physical bounds of the device.

The output from Listing [email protected] [507]$ ./Debug/errnoDemo Opening /tmp/this_file_does_not_exist.yarly... Macro: int EWOULDBLOCK In the GNU C Library, this is another name for EAGAIN (above). Macro: int EINPROGRESS An operation that cannot complete immediately was initiated on an object that has non-blocking mode selected. Errno.h Windows if ( (listenfd = socket(AF_INET, SOCK_STREAM, 0)) < 0) { fprintf(stderr, "Cannot create server socket!

This can also be returned by getspnam() when you aren't root. #define EFAULT 14 /* Bad address */ A bad memory address, specifically one that doesn't belong to the current process. Posix Error Codes TCP has the concept of "out of band data" (urgent data). In such cases, a successful return can be distinguished from an error return by setting errno to zero before the call, and then, if the call returns a status that indicates Integer function which takes every value infinitely often Development of retrosynthesis plan Dealing with a nasty recruiter Player claims their wizard character knows everything (from books).

Only the errors listed above are required to exist on a POSIX 1003.1-conforming system, anything else is gravy.Listing 5. Linux Errno To String Inappropriate requests ( reading from a write only device) may return this or EINVAL- there's seems to be plenty of confusion as to which to use. #define ENOTDIR 20 /* Not And, while a filesystem is being mounted or unmounted, a process that attempts to access it will find it locked and will get this error. #define EEXIST 17 /* File exists Macro: int ENOLCK No locks available.

Posix Error Codes

For example, if you try to delete a file that is the root of a currently mounted filesystem, you get this error. Don't try setting the baud rate on a directory, for example.ENXIO -- You've attempted an I/O request on a special file for a device that doesn't exist.EPERM -- The operation isn't Linux Errno Codes They are supported on UNIX systems by other languages (C++, Objective-C, Python, and so forth). Linux Errno Example void thread_safe( int err ) { char buff[256]; if( strerror_r( err, buff, 256 ) == 0 ) { printf( "Error: %s\n", buff ); } }The perror() and strerror()/strerror_r() functions are probably

Macro: int ESOCKTNOSUPPORT The socket type is not supported. navigate here Dig deeper into AIX and Unix on developerWorks Overview Technical library (tutorials and more) Forums Community Downloads and products Open source projects Events developerWorks Premium Exclusive tools to build your next Macro: int ENETUNREACH A socket operation failed because the subnet containing the remote host was unreachable. As mentioned above, drivers may return this for inappropriate ioctl() calls. Errno.h In C

TNG Season 5 Episode 15 - Is the O'Brien newborn child possessed, and is this event ever revisited/resolved/debunked? Macro: int ETXTBSY An attempt to execute a file that is currently open for writing, or write to a file that is currently being executed. One of the programs in the pipe chain has closed its part of the stream (by exiting, for example).ERANGE -- You've called a function, and the return value is too large http://crimsonskysoftware.com/linux-errno/unix-error-codes-13.html return -EIO)"??? –Pete Dec 4 '09 at 18:24 I looked at the question's title and immediately had a seizure, followed by deep coma.

But you gave nothing special more than formatting the contents of the linux errno headers. Einval Errno See Sockets. When this happens, you should try the call again.

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

but enough meta talk lol –Earlz Dec 4 '09 at 18:57 | show 2 more comments 3 Answers 3 active oldest votes up vote 12 down vote accepted That's basically the Do not do this. Does the reciprocal of a probability represent anything? Efault The link() function also fails with EEXIST if the "new" file is not. #define EXDEV 18 /* Cross-device link */ You can't link across filesystems (that's what symbolic links are for).

paper out ESHLIBVERS0.187Shared library version mismatch EBADEXEC0.185Bad executable EBADARCH0.186Bad CPU type in executable -0.143Unknown error UNKNOWN0.137Unknown error [1] AIX ENOTEMPTY is 17 "Directory not empty" if _ALL_SOURCE and !_LINUX_SOURCE_COMPAT [2] AIX In GNU, this error is always synonymous with ENOMEM; you may get one or the other from network operations. The errno variable records your failures// errno for fun and profit #include #include #include #include #include const char *FILE_NAME = "/tmp/this_file_does_not_exist.yarly"; int main( int argc, char this contact form Trick or Treat polyglot Are assignments in the condition part of conditionals a bad practice?

See Asynchronous I/O. Macro: int EILSEQ While decoding a multibyte character the function came along an invalid or an incomplete sequence of bytes or the given wide character is invalid. You have to include errno.h header file to use external variable errno. How to draw a clock-diagram?

Macro: int ENOBUFS The kernel’s buffers for I/O operations are all in use. In cases like this, it's important to check your input data for sanity, or check errno after every call.EROFS -- You attempted to modify a file or directory stored on a The following error codes are defined by the Linux/i386 kernel. share|improve this answer answered Dec 4 '09 at 18:25 Carl Smotricz 46.1k1187142 6 There at least used to be a tendency to define 0 as success, positive as successful with

The program's behavior changes just because you add a non-used variable declaration? Link Felix Frank October 21, 2010, 8:16 am Hi, good thinking, but this article desperately lacks a reference to perror. See Creating a Socket. The system does not guarantee that it will notice all such situations.

It changes the size of the stack frame and so may expose or hide problems caused by buffer overruns etc. –anon May 20 '09 at 8:25 No, I checked Otherwise we can only guess as to what the problem is. The same conventions could be used in any language. So will tcdrain(), tcflush(), tcflow() and tcsendbreak(). #define ETXTBSY 26 /* Text file busy */ A "text" file is a program- an executing binary.