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Join them; it only takes a minute: Sign up socket.error errno.EWOULDBLOCK up vote 0 down vote favorite 2 i'm reading some code and i've come across this line socket.error errno.EWOULDBLOCK can Macro: int ENOTCONN The socket is not connected to anything. Macro: int ENOTSOCK A file that isn’t a socket was specified when a socket is required. Macro: int ENOTSUP Not supported.

Macro: int ENOTBLK A file that isn’t a block special file was given in a situation that requires one. This often indicates a cycle of symbolic links. This error happens on operations that are supposed to manipulate child processes, when there aren’t any processes to manipulate. All of them expand into integer constant values.

Macro: int ECHILD There are no child processes. Macro: int EIO Input/output error; usually used for physical read or write errors. Macro: int ETOOMANYREFS ??? Macro: int ENOSPC No space left on device; write operation on a file failed because the disk is full.

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 Macro: int EHOSTUNREACH The remote host for a requested network connection is not reachable. Macro: int EUSERS The file quota system is confused because there are too many users.

it's a modern post apocalyptic magical dystopia with Unicorns and Gryphons House of Santa Claus Sum of neighbours What is a type system? Macro: int ENOTDIR A file that isn’t a directory was specified when a directory is required. Portability Note: In many older Unix systems, this condition was indicated by EWOULDBLOCK, which was a distinct error code different from EAGAIN. How to make files protected?

Tell company that I went to interview but interviewer did not respect start time Is it possible to have a planet unsuitable for agriculture? Macro: int EEXIST File exists; an existing file was specified in a context where it only makes sense to specify a new file. Macro: int EGRATUITOUS This error code has no purpose. Repairing this condition usually requires unmounting, possibly repairing and remounting the file system.

Macro: int EMLINK Too many links; the link count of a single file would become too large. Browse other questions tagged python sockets or ask your own question. The values are always the same, on every operating system. Macro: int ETIMEDOUT A socket operation with a specified timeout received no response during the timeout period.

Macro: int EOPNOTSUPP The operation you requested is not supported. See Creating a Socket. It sets up a server and client which try to talk to each other over a socket connection. C libraries in many older Unix systems have EWOULDBLOCK as a separate error code.

Thank you so much. –nguyenngoc101 Aug 13 '12 at 16:23 | show 1 more comment Your Answer draft saved draft discarded Sign up or log in Sign up using Google share|improve this answer edited Jan 22 '14 at 0:22 answered Aug 13 '12 at 3:31 EJP 197k17140249 But i set size buffer is big enough to save all data Macro: int EPROGUNAVAIL ??? What is a type system?

When must I use #!/bin/bash and when #!/bin/sh? I set buffer size is bigger than capacity of the packet.the packet splits into pieces and send continuously this piesces –nguyenngoc101 Aug 13 '12 at 3:47 I am referring Macro: int ENOMEM No memory available. I think this happens because both ends of the connection are trying to receive data: import socket import multiprocessing as mp import sys import time def server(): HOST='localhost' PORT=6000 s=socket.socket(socket.AF_INET, socket.SOCK_STREAM)

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. Is EAGAIN/EWOULDBLOCK a permanent status, so that once detected I should delist that socket from any further observation? Browse other questions tagged linux socket io or ask your own question. python sockets share|improve this question edited Dec 29 '13 at 12:06 Benjamin 11.4k1693171 asked Aug 13 '12 at 3:27 nguyenngoc101 3111317 Ewouldblock thew from send() function –nguyenngoc101 Aug 13

The call might work if you try later. I multiplex the downloads so that on average I have not more than 2 parallel streams per host (as per the HTTP spec recommendation), and also so that I loop over Why are unsigned numbers implemented? If the entire function is not available at all in the implementation, it returns ENOSYS instead.

Macro: int ENOENT No such file or directory. Join them; it only takes a minute: Sign up EWOULDBLOCK Error in socket programming up vote 3 down vote favorite 1 I use socket in non-blocking mode, Client send data continuously Macro: int ENOSYS Function not implemented. Macro: int ECONNREFUSED A remote host refused to allow the network connection (typically because it is not running the requested service).

Does the recent news of "ten times more galaxies" imply that there is correspondingly less dark matter? Some functions that must always block (such as connect; see Connecting) never return EAGAIN.