ipc | Go wrapper for System V message queue | Messaging library

 by   siadat Go Version: v1.0.0 License: MIT

kandi X-RAY | ipc Summary

kandi X-RAY | ipc Summary

ipc is a Go library typically used in Messaging, RabbitMQ applications. ipc has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

Wrapper functions for System V Message Queue IPC.
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            kandi-support Support

              ipc has a low active ecosystem.
              It has 52 star(s) with 13 fork(s). There are 4 watchers for this library.
              OutlinedDot
              It had no major release in the last 12 months.
              There are 0 open issues and 6 have been closed. On average issues are closed in 85 days. There are no pull requests.
              It has a neutral sentiment in the developer community.
              The latest version of ipc is v1.0.0

            kandi-Quality Quality

              ipc has 0 bugs and 0 code smells.

            kandi-Security Security

              ipc has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              ipc code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              ipc is licensed under the MIT License. This license is Permissive.
              Permissive licenses have the least restrictions, and you can use them in most projects.

            kandi-Reuse Reuse

              ipc releases are available to install and integrate.
              Installation instructions are not available. Examples and code snippets are available.

            Top functions reviewed by kandi - BETA

            kandi has reviewed ipc and discovered the below as its top functions. This is intended to give you an instant insight into ipc implemented functionality, and help decide if they suit your requirements.
            • basic FTok
            • MsgctlExtend extend the Msgctl interface
            • Msgrcv is a wrapper around MsgcvV .
            • PrepareMsg prepares the message buffer .
            • MsgndPrepared sends a prepared message .
            • Msgctl calls syscall . Msgctl
            • convertBuffer converts a MsqidDS to r .
            • F Ftok checks if a file exists
            • Msgsnd is the same as Msg except it does not modify the message .
            • init initializes the messagemax .
            Get all kandi verified functions for this library.

            ipc Key Features

            No Key Features are available at this moment for ipc.

            ipc Examples and Code Snippets

            System V message queue IPC functions,Example
            Godot img1Lines of Code : 29dot img1License : Permissive (MIT)
            copy iconCopy
            package main
            
            import (
            	"log"
            	"syscall"
            
            	"github.com/siadat/ipc"
            )
            
            func main() {
            	key, err := ipc.Ftok("/dev/null", 42)
            	if err != nil {
            		panic(err)
            	}
            
            	qid, err := ipc.Msgget(key, ipc.IPC_CREAT|ipc.IPC_EXCL|0600)
            	if err == syscall.EEXIST {
            		l  

            Community Discussions

            QUESTION

            Shared-memory IPC solution for both Linux and Windows
            Asked 2022-Mar-28 at 01:00

            Below is a simple and perfect solution on Windows for IPC with shared memory, without having to use networking / sockets (that have annoying limits on Windows). The only problem is that it's not portable on Linux:

            Avoiding the use of the tag parameter will assist in keeping your code portable between Unix and Windows.

            Question: is there a simple way built-in in Python, without having a conditional branch "if platform is Windows, if platform is Linux" to have a shared-memory mmap?

            Something like

            ...

            ANSWER

            Answered 2022-Mar-23 at 08:23

            The easiest way is to use python with version >=3.8, it has added a built-in abstraction for shared memory, it works on both windows and linux https://docs.python.org/3.10/library/multiprocessing.shared_memory.html

            The code will look something like this:

            Process #1:

            Source https://stackoverflow.com/questions/71479189

            QUESTION

            Oracle 12c docker setup on Apple M1
            Asked 2022-Mar-21 at 09:52

            I am trying to run Oracle db in docker on M1 Mac. I have tried images from both store/oracle/database-enterprise:12.2.0.1-slim and container-registry.oracle.com/database/enterprise:12.2.0.1-slim but getting the same error.

            docker run -d -it --name oracle -v $(pwd)/db/oradata:/ORCL store/oracle/database-enterprise:12.2.0.1-slim

            I also tried non-slim version and by providing the --platform linux/amd64 to the docker command. Result is same.

            Here's the result of docker logs -f oracle

            ...

            ANSWER

            Answered 2021-Aug-04 at 20:48

            There are two issues here:

            1. Oracle Database is not supported on ARM processors, only Intel. See here: https://github.com/oracle/docker-images/issues/1814
            2. Oracle Database Docker images are only supported with Oracle Linux 7 or Red Hat Enterprise Linux 7 as the host OS. See here: https://github.com/oracle/docker-images/tree/main/OracleDatabase/SingleInstance

            Oracle Database ... is supported for Oracle Linux 7 and Red Hat Enterprise Linux (RHEL) 7. For more details please see My Oracle Support note: Oracle Support for Database Running on Docker (Doc ID 2216342.1)

            The referenced My Oracle Support Doc ID goes on to say that the database binaries in their Docker image are built specifically for Oracle Linux hosts, and will also work on Red Hat. That's it.

            Because Docker provides process level virtualization it still pulls kernel and other OS libraries from the underlying host OS. A Docker image built for Oracle Linux needs an Oracle Linux host; it doesn't bring the Oracle Linux OS with it. Only Oracle Linux or Red Hat Linux are supported for any Oracle database Linux installation, with or without Docker. Ubuntu, Mac OS, Debian, or any other *NIX flavor will not provide predictable reliable results, even if it is hacked into working or the processes appear to work normally.

            Source https://stackoverflow.com/questions/68605011

            QUESTION

            File Descriptors closing in forked subprocesses in Python
            Asked 2022-Mar-12 at 10:33

            In a Python 3.8 application a parent process is responsible for creating child processes (workers) and forwarding messages to them via IPC (tasks).

            Parent process has its own logger that uses FileHandler to write to a file main.log but it also opens one logger per child process with a unique file for each of them to log IPC activity and errors.

            Child processes are created via system call fork. IPC is done via OS queues. See below diagram that illustrates the situation.

            The problem: while it is beneficial to log IPC activity on the parent process side and keep it in a dedicated file, this opens a lot of File Descriptors (FDs) which are all inherited by each and every subsequent child process.

            Question: how to manage these FDs? Manually find and close them in each child process on run()? Is there a better way?

            ...

            ANSWER

            Answered 2022-Mar-12 at 10:06

            Set the close-on-exec flag for those file descriptors you don't want to carry over to the child processes. Either by setting the O_CLOEXEC flag upon opening, or later with fcntl set FD_CLOEXEC.

            Before you ask, O_CLOEXEC != FD_CLOEXEC.

            Source https://stackoverflow.com/questions/71448409

            QUESTION

            GCP Dataproc - Failed to construct kafka consumer, Failed to load SSL keystore dataproc.jks of type JKS
            Asked 2022-Feb-10 at 05:16

            I'm trying to run a Structured Streaming program on GCP Dataproc, which accesses the data from Kafka and prints it.

            Access to Kafka is using SSL, and the truststore and keystore files are stored in buckets. I'm using Google Storage API to access the bucket, and store the file in the current working directory. The truststore and keystores are passed onto the Kafka Consumer/Producer. However - i'm getting an error

            Command :

            ...

            ANSWER

            Answered 2022-Feb-03 at 17:15

            I would add the following option if you want to use jks

            Source https://stackoverflow.com/questions/70964198

            QUESTION

            VS code slow for a specific project
            Asked 2021-Dec-15 at 17:55

            I've been using VS coed for some years now and I loved the experience so far, but one of my most recent projects is suddenly slowdowns the VS code drastically, I couldn't figure out why yet. And amazingly other projects do not give me this headache at the moment, with VS code. So I suspect there's something with the particular project I was mentioned before giving me the trouble. I tried deleting the repo and cloning it again in a new place, uninstalled and installed VS code again, but still no luck. It's really laggy, It takes upto a minute or so to update something I wrote in the editor.

            Here's the status report of VS code when the problem occurs

            ...

            ANSWER

            Answered 2021-Dec-15 at 17:55

            I have the exact same issue with VSCode and decided to download the latest version of VSCode Insiders (https://code.visualstudio.com/insiders/). They seem to have fixed this issue as the problem is not showing up anymore on any of the affected projects.

            You can also sync your VSCode settings with VSCode Insiders (https://code.visualstudio.com/docs/editor/settings-sync) so you can continue to work normally until this issue is fixed in regular VSCode.

            Source https://stackoverflow.com/questions/70287351

            QUESTION

            Webpack Dev Server Config - contentBase not working
            Asked 2021-Dec-10 at 20:27

            I'm trying to setup a webpack dev server but for a reason, I'm running into an error.

            [webpack-cli] Invalid options object. Dev Server has been initialized using an options object that does not match the API schema. options has an unknown property 'contentBase'. These properties are valid: object { allowedHosts?, bonjour?, client?, compress?, devMiddleware?, headers?, historyApiFallback?, host?, hot?, http2?, https?, ipc?, liveReload?, magicHtml?, onAfterSetupMiddleware?, onBeforeSetupMiddleware?, onListening?, open?, port?, proxy?, server?, setupExitSignals?, static?, watchFiles?, webSocketServer? }

            I did install all the needed packages globally and tried some other suggestions but I cannot get it to work.

            This is the config:

            ...

            ANSWER

            Answered 2021-Dec-10 at 20:27

            I can assume the error appeared after migration to the latest version of Webpack/DevServer, they did several breaking changes, including devServer settings. Especially for this issue try to use this code instead of contentBase:

            Source https://stackoverflow.com/questions/70309830

            QUESTION

            IPC Error on GPG Agent with Git on Windows
            Asked 2021-Nov-23 at 21:58

            I would like to use GPG without Gpg4win installed on Windows because Git for Windows includes the binary for GPG we well, so I would like to use it instead of installing an extra application.

            However, when I setup the GPG (e.g adding Path etc), I have encountered the following error:

            ...

            ANSWER

            Answered 2021-Aug-10 at 05:17

            I managed to figure it out.

            This is because the gpg in git for windows uses MINGW64 for the environment. And because I manually set the GNUPGHOME environment variable to a Windows path: C:/users/me/.gnupg, it will not work.

            (I never use the included MINGW64 git bash, I only use cmd and add those exe, like git, gpg into PATH)

            So, if you have manually set the GNUPGHOME env variable, you need to change to a MINGW64 path.

            So in my case, C:/users/me/.gnupg -> /c/users/me/.gnupg

            I am not sure about --homedir though.

            Source https://stackoverflow.com/questions/68721294

            QUESTION

            ShellIpcClient and NonCelloThread errors java
            Asked 2021-Nov-15 at 06:34

            I have a strange "problem" in a Java project. This is the method where the error is:

            ...

            ANSWER

            Answered 2021-Nov-15 at 06:34

            This would appear to by a google drive operation error.

            Perhaps you have the folder synchronized using Google Drive for desktop software, which intercepts file system requests. And, perhaps, that software is currently failing.

            So, likely local storage still works, but the file system isn't getting correctly synchronized to Google Drive, which is why it might be complaining.

            I guess this because of this text in your error message:

            Source https://stackoverflow.com/questions/69966119

            QUESTION

            Git Bash error: fsmonitor_ipc__send_query
            Asked 2021-Nov-07 at 05:53

            I would just like to ask what could be the meaning of this error?

            ...

            ANSWER

            Answered 2021-Sep-01 at 17:08

            Error seems to be related to a bug in Git for Windows 2.32. Upgrading to Git for Windows 2.33+ has fixed it for several people.

            Source https://stackoverflow.com/questions/68915288

            QUESTION

            IPC msgsnd waits unexpectedly
            Asked 2021-Nov-02 at 05:30

            [Although I'm working in perl I believe that this question relate to Linux System V IPC APIs and limits rather that the anything perl-specific.]

            I have two Centos machines, each at CentOS Linux release 7.9.2009 (Core).

            I have a program that forks a child and then uses System V IPC messages to communicate with the child, the child prepares answers ands sends them to the parent.

            On one machine we see expected behaviour. The child produces batches of messages, the parent consumes them. Occasionally the child works a little faster than the parent, and so may fill the queue, the child then waits until the parent consumes some messages and proceeds.

            We can inspect the queue sizes with ipcs -q and see that the default limit of 10 messages per queue is occasionally reached, the child pauses, and then we see the queue empty as expected.

            We believe that the queue limits are specified in files in /proc/sys/fs/mqueue/ and for example msg_max is seen to be the expected 10. These values are identical on both machines.

            We also can view user ulimits relating to queue using ulimit -q and see a value in excess of 800,000 bytes on both machines.

            The puzzle is that on our second machine we see the child write three messages to the queue and attempt to write the fourth and wait - we deliberately set no timeout. It is as though the writer believes that the queue is full, even though ipcs -q shows only 3 items in the queue. At this point in time the parent is not yet attempting to read the messages.

            ...

            ANSWER

            Answered 2021-Nov-02 at 05:30

            The problem was that the default max size of queue kernel setting was set to a low value.

            This cal be viewed using the -l option to ipcs.

            Source https://stackoverflow.com/questions/69799187

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network

            Vulnerabilities

            No vulnerabilities reported

            Install ipc

            You can download it from GitHub.

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