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Socket Read Eagain


And if you don't want to block, you must set the socket.) What will happen, though, is that the thread will spin. –David Schwartz Apr 4 '12 at 19:21 add a when I run the client and server in two computers in lan network, it works grate, but when move the server program to a linux server in internet (client connects to linux socket io share|improve this question asked Apr 3 '12 at 8:35 EdNdee 10813 Can you clarify exactly what's happening? When is it a good idea to make Constitution the dump stat? this contact form

For some system calls and library functions (e.g., getpriority(2)), -1 is a valid return on success. Join them; it only takes a minute: Sign up EAGAIN Error: Using Berkeley Socket API up vote 1 down vote favorite 1 Sometimes when I try to send some packets continuously( Hot Network Questions Why would a NES game use an undocumented 1-byte or 2-byte NOP in production? Trying the same operation again will block until some external condition makes it possible to read, write, or connect (whatever the operation). http://stackoverflow.com/questions/3989811/eagain-error-using-berkeley-socket-api

Socket Read Eagain

Just use strerror(3) to figure out the actual issue. Some functions that must always block (such as connect; see Connecting) never return EAGAIN. In general when using non-blocking sockets you already have a more or less central select/poll/epoll/kqueue call where all the socket multiplexing is done, including EAGAIN handling. share|improve this answer edited Feb 1 '15 at 12:03 Barracuda 1,142827 answered Oct 21 '14 at 19:02 Edward Alberts 1 add a comment| Your Answer draft saved draft discarded Sign

your totally right about that behaviour in tcp and I'm sure the answer will help somebody. It's a lot cleaner than the signal nonsense necessary with blocking I/O, even if you don't have to worry about thread-safeness... Upright Piano action problems more hot questions question feed about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Msg_dontwait Search Forums Show Threads Show Posts Tag Search Advanced Search Unanswered Threads Find All Thanked Posts Go to Page... unix and linux operating commands Getting EAGAIN error while sending

Macro: int EISCONN You tried to connect a socket that is already connected. Eagain Socket Send Anyway the OP has since clarified that it was non-blocking on purpose –Celada Jan 30 '13 at 2:47 I know I would sound crazy here however, Could it be Going into a tight retry loop works, but doesn't seem a good way to approach things. http://stackoverflow.com/questions/19754275/write-always-returns-eagain-for-connected-nonblock-socket-after-a-while How to write an effective but very gentle reminder email to supervisor to check the Manuscript?

Here is the code: Expand|Select|Wrap|Line Numbers //LISTENING... Errno 11 With non-blocking, the socket may or may not be available so you might need to try again. This happens only on MAC OS Lion operating system, for other OS this runs perfectly fine do{ rc = recv(i, buffer, sizeof(buffer), 0); if (rc < 0){ printf("err code %d", errno); Personally, that's the only reason I've ever used them...

Eagain Socket Send

The man page says EAGAIN will occur if no data is available and this flag is specified. asked 4 years ago viewed 2777 times active 4 years ago Related 3How do you determine what type of CPU socket a linux computer has?0mysql error 2002 “cannot connect to socket”0Zebra Socket Read Eagain Offline Quote #3 2005-12-14 09:37 PM i3839 Oddministrator From: Amsterdam Registered: 2003-06-07 Posts: 2,230 Re: Strategy for EAGAIN on non-blocking sockets An alternative would be to temporary set the socket to Send Eagain All Rights Reserved.

thanks. weblink Macro: int EPROCUNAVAIL ??? The following error codes are defined by the Linux/i386 kernel. Why is the Vitamin B complex, a "complex"? Eagain Value

Jan 25 '11 #4 reply Message Cancel Changes Post your reply Join Now >> Sign in to post your reply or Sign up for a free account. Macro: int EPIPE Broken pipe; there is no process reading from the other end of a pipe. Thanks David. "If a read operations returns EWOULDBLOCK, you don't want to try to read again until you get another epoll read hit" - That's actually quite important coz the thread http://wipidigital.com/socket-error/how-to-fix-socket-error.html EAGAIN is the normal return from recv() (and other system calls) when there is no data available to read.

errno is defined by the ISO C standard to be a modifiable lvalue of type int, and must not be explicitly declared; errno may be a macro. Errno Values When data is cleared from the remote buffer (by being read by the remote application) then the remote system will inform the local system to send more data. How to decide to create a multilingual site or to create different site for each language?

Macro: int EFTYPE Inappropriate file type or format.

Not the answer you're looking for? Related 2EAGAIN error for accept on blocking socket5Read signaled by select(), but recv() returns no data and signal EAGAIN on non-blocking sockets2Reading socket: EAGAIN: Resource temporarily unavailable1Using non-blocking socket. Now I am not sure what should I do than. Recv Thanks in advance for your help.

Macro: int ENFILE There are too many distinct file openings in the entire system. As I know, write returns EAGAIN, when the kernel has no available space for the write buffer and it does not make any sense that kernel has no memory for me In general you use non-blocking sockets because you have other things to do than waiting on only one socket. his comment is here Macro: int ENOTBLK A file that isn’t a block special file was given in a situation that requires one.

Thanks. How can I rotate an object based on another's offset to it? Macro: int EDIED On GNU/Hurd systems, opening a file returns this error when the file is translated by a program and the translator program dies while starting up, before it has Also, please pay attention to your indentation.

Remove advertisements Sponsored Links mr_deb View Public Profile Find all posts by mr_deb #2 10-25-2010 jim mcnamara [email protected] Browse other questions tagged c osx sockets or ask your own question. 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 ECONNABORTED A network connection was aborted locally.

Not the answer you're looking for? It's ok to make that a relatively large value, if you're ok with that... Macro: int ENOEXEC Invalid executable file format. This is a “file doesn’t exist” error for ordinary files that are referenced in contexts where they are expected to already exist.

Macro: int EGRATUITOUS This error code has no purpose. I was thinking from the point of view that the file descriptor might have come from some sort of library that always returns nonblocking sockets.