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Questions tagged [socketpair]

23 questions
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Is write to SOCK_SEQPACKET atomic?

What I mean atomic is success or failed and do nothing. I know socketpair(AF_LOCAL, SOCK_STREAM) is not atomic, if multiple processes/threads call write(fd, buf, len), the return value of the write() maybe > 0 && < len and cause data out of…
alpha
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Behavior of SO_SNDBUF when using socketpair

I want to send messages between two threads using socketpair. I am writing code to find out how many messages can be send using a socketpair, with message of size 16 bytes ( two pointers ). The code I used is below: int fds[2]; socketpair(AF_LOCAL,…
Manu Thomas Mathew
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Delay in read/write pipe when many requests for unix pipe (sockerpair) communication in Golang

I have a performance problem with sockerpair in Golang (also known as unix pipe inter-process communication). The delay would be very long, if there are many requests issued to pipe. One process sends out about 10K requests; and then the reader…
JQian
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Why can't I communicate with a forked child process using Tokio UnixStream?

I'm trying to get a parent process and a child process to communicate with each other using a tokio::net::UnixStream. For some reason the child is unable to read whatever the parent writes to the socket, and presumably the other way around. The…
cdecker
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socketpair() & creating new child processes after close() of worker socket

First off: this is not a Unix/Linux system. I am working on an IBM AS/400 V7R1 (C++ 98) and do not have access to fork(). Nevertheless, I do have spawnp() to start new child processes and the AS/400 supports the notion of process groups. In my…
Kelly Beard
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Using socketpair() under Rust

How can you call Linux' socketpair() command in rust? I was not able to find it in the documentation.
user3272410
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ncurses interrupts system call when resizing terminal

I have a problem with ncurses and couldn't find a solution on the web, so I've written following little program to demonstrate the problem. You can compile it via: sudo aptitude install ncurses-dev g++ -lncurses -o resize resize.cpp It displays an…
user2876571
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Perl select returning undef on sysread when using Windows, IPC::Open3, and IO::Socket->socketpair()

I found this example (posted by @ikegami) of a way to use IPC::Open3 on windows using sockets. The problem is that, when I run it, I get an error An existing connection was forcibly closed by the remote host on the sysread. The command runs, the…
Lucas
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Error "failed to create socketpair" when run adb shell

I got an error when run adb command: adb -s 127.0.0.1:21503 shell input swipe 1000 345 350 345 250 And the error: error: failed to create socketpair to intercept data: Too many open files It works fine at first, but after about 15 minutes this…
Hứa Phú Quý
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create socketpairs() for multiple forks() or just one is enough

I'm trying to make a program that does the following: ./run cmd1 arg1 : cmd2 arg2 : cmd3 arg3 allows me to run three commands for example in parallel using fork() and execvp and connecting the output of the cmd 1 to the input of the cmd 2 using…
asmazizou
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permission denied calling socketpair() from kubernetes container

Trying to run some Python software in a docker container, I consistently get EPERM errors when creating a (abstract) unix domain socket using socket.socketpair(): % python3 -c 'import socket; socket.socketpair()' Traceback (most recent call last): …
jelmer
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Is it possible that socketpair() return same pairs?

I understand that socketpair API can generate a pair of connected sockets. But is it true that socketpair() can generate two same pairs in the same process? // In the same process int fd[2]; int r = socketpair(AF_UNIX, SOCK_STREAM, 0,…
Alan
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use dup2 to redirect printf failed

The code is following. Q1: If dup2(fd3, STDOUT_FILENO), string2 will be in log.txt. If dup2(g_ctl[0], STDOUT_FILENO), string2 won't be received by g_ctl[1]. string1 and ls -al output will be received, Why ? Q2: The third library have some…
Kathy.Pu
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C++ Socket Pair Not Reading/Writing Parent/Child

I've been assigned a project in which I need to use Unix Domain Sockets to communicate two-way between a parent and child process. My original approach was to create a child and server, but I was getting some serious issues with connectivity and…
Ainsley
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Why does socketpair() allow SOCK_DGRAM type?

I've been learning about Linux socket programming recently, mostly from this site. The site says that using the domain/type combination PF_LOCAL/SOCK_DGRAM... Provides datagram services within the local host. Note that this service is…
StoneThrow
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