broken pipe

Basic Concepts: Pipelines have no names, so their greatest disadvantage is that they can only be used between processes that have a common ancestor process. We cannot create a pipe between unrelated processes and use it as an IPC pipe (regardless of descriptor delivery). FIFO refers to first In,first, which is a one-way (Half-duplex) data stream. Unlike pipelines, each FIFO has a path name associated with i

This article mainly introduces the Pipe pipeline instance in the Pythonmultiprocessing module. This article provides examples for use. For more information, see Multiprocessing. Pipe ([duplex])Two connection objects (conn1, conn2) are returned, representing the two ends of the pipeline. the default value is bidirectional communication. if duplex = False, conn1 can only be used to receive messages, and conn2

Lai Yonghao (http://laiyonghao.com) Note: This article is basically a translation of this article.ArticleHttp://dev-tricks.net/pipe-infix-syntax-for-python ). Through the pipe module, you can use the infix syntax in Python. First, let's take a look at the traditional prefix syntaxCode: Sum (select (where (take_while (FIB (), Lambda X: x Hard to read? Let's take a look at the fix syntax code:

-depth sample code. Recall the command-line pipeline in front of this article, where we use the standard output of the ls–1 command as the standard inputConnect to the Wc–l command. Next, we will use a C program to illustrate the implementation of this process. The code is shown in example code 3 below.In example code 3, you first create a pipeline in line 9th and then divide the application into two processes: a subprocess (line 13–16)and a parent process (line 20–23). Next, the STDOUT descript

1. Background Once I met this requirement: application a (which can be encoded and compiled by myself) calls a console application B (which cannot be modified by a third party ), console program B prints data on the standard output device (similar to the command line window). Application A needs to obtain and process the data. After this requirement is met, the following implementation methods are summarized: "Pipeline" and "redirection ". This section briefly summarizes the concept of "Pipeline

Linux processes communicate in the following ways:1-"pipelines (PIPE) and named pipelines (FIFO ).2-> Message Queue3-shared memory4-"semaphores5-"signal (signal)6-"socket (sicket) Here, let's take a look at Pipeline (PIPE ). See other articles for the famous Pipeline (FIFO. Eg: The previously learned command cat file | grep "ABC"> file2In my opinion, the content in the cat reading file is read. The grep com

As early as the Oracle 8,oracle 8i,oracle 9i, there was no datapump, so the work of the logical database migration depended more on exp/imp,However, when disk space is limited and downtime is short, we usually need a way to do it without landing.At that time, our usual way is to use the pipeline, that is, exp to export the database to the pipe, the target segment through the pipeline directly to the data imp to the target database, so that the data do

IPC inter-process communication + pipeline PipeIPC (Inter-Process Communication ).MPs queues are used to share data between processes. The essence is shared memory, one of the commonly used IPC. Pipelines can be used not only for communication between local processes, but also for cross-network process communication. Like Socket communication, pipelines also encapsulate the underlying network implementation of computers and provide a good API interface.1. Pipeline (

1. What is a named pipe? Like TCP/IP (transmission control protocol or internet Protocol), a named pipe is a communication protocol. It is generally used in Lan, because it requires the client to have the permission to access server resources. To answer this question, I 'd better extract official Microsoft documents. Http://msdn.microsoft.com/zh-cn/library/ms187892.aspx To connect to the SQL Server databas

Pipe is not a python built-in library, if you install Easy_install, you can install it directly, otherwise you need to download it yourself: http://pypi.python.org/pypi/pipeThis library is introduced because it shows us a very new way to use iterators and generators: streams. The pipe sees the iterated data as a stream, similar to linux,pipe using ' | ' The flow

Operating System Concepts Learning Note 12 process synchronization (ii) Pipe pathA basic, advanced synchronization construct, the Enhancement (monitor) type.Use:The pipe type provides a set of operations defined by the programmer that are mutually exclusive within the pipe. The representation of a pipe type includes th

Anonymous pipe A pipe is a one-way channel, somewhat similar to a shared memory cache. The pipe has two ends, including the input and the output. For a process, it sees only one end of the pipe, either an input or an output end. Os.pipe () returns 2 file descriptors (R, W) that represent both readable and writable. T

Inter-process Communication-pipeinter-process communicationEach process has a different user address space, the global variables of any one process can not be seen in another process, so the process to exchange data between the kernel, the kernel to open a buffer, process 1 data from the user space to the kernel buffer, process 2 and then read the data from the kernel buffer, This mechanism provided by the kernel is called interprocess communication (ipc,interprocess communication).PipePiping (

in windows, the IPC (inter-process communication) mechanism mainly involves asynchronous pipelines and named pipelines. (Other IPC methods, such as memory ing and mail slot, will not be described here) pipeline (PIPE) is the shared memory area used for inter-process communication. The process for creating an MPS queue is called the MPs Queue Server, and the process connecting to the MPs queue is called the MPs queue client. One process writes informa

Multi-process communication The difference between queue and pipe: pipe is used to communicate between two processes. Queue is used to implement communication between multiple processes. These two methods are the basic methods for multi-process communication in all systems. Almost all languages support these two methods. 1) queue joinablequeue Queue is used to transmit messages between processes.

Originally I intend to open a separate chapter, specifically to explain the sticky bag and broken bag, but I think this thing I am doing is a headache, but for others may not be so important, so write it here.So what is a sticky bag or a broken bag? Sticky pack: We know that the client writes the message to the server, the first thing to write to buffer, in Bytebuffer for example, if you buffer is

Requirements to implement： Using the relevant knowledge and functions of the named pipes, write the server process and the client process program separately. Requires that both the server process and the client process program be able to pass data to each other. Ends a session when the server process and any end of the client process enter "End". Wrote for a long time, found that if only a single pipe, it is very difficult, the p

Cold wind Let's take a closer look at the zero pipeline ........ . μ P 2 breezeThis is not just Kabbah, but basically all active defenses !!Packet port SSM, micropoints ,,, XicaoHot Patching . μ P 2 breezeYes .. Cold windReplace the input and output handle directly with a socket to implement zero Pipe SulwanRevolutionizing core programming . μ P 2 breezeI use a zero-pipe network .. PhantomSi. hstdinput = h

A friend of Linux must know the pipe (pipe) function provided by the shell, perhaps you do not know his full name, then you have not used such a command: Cat INSTALL | More This type of command usage is based on the technology of the pipeline, which is different from redirection (redirection). PHP provides the Popen function to open a pipeline: int Popen (string command,string mode); Popen () opens a

Multiprocessing. Pipe ([duplex])Returns 2 Connection objects (CONN1, conn2), which represent both ends of the pipeline, and the default is two-way communication. If DUPLEX=FALSE,CONN1 can only be used to receive messages, CONN2 can only be used to send messages. Unlike Os.open, where Os.pipe () Returns 2 file descriptors (R, W) representing both readable and writable Examples are as follows:Copy the Code code as follows: #!/usr/bin/python #coding =ut