musl | musl libc experiment | Binary Executable Format library

 by   jfbastien C Version: Current License: Non-SPDX

kandi X-RAY | musl Summary

kandi X-RAY | musl Summary

musl is a C library typically used in Programming Style, Binary Executable Format applications. musl has no bugs and it has low support. However musl has 7 vulnerabilities and it has a Non-SPDX License. You can download it from GitHub.

The goal of this prototype was to get a WebAssembly libc off the ground. Limited dynamic linking (no cross-module function pointers) came out of it for free which is mighty convenient. We should:. Note: This experimental WebAssembly C library with limited dynamic linking is a hack. Don't rely on it: it's meant to inform the design of WebAssembly. Things are changing rapidly, so mixing different parts of the toolchain may break from time to time, try to keep them all in sync. In particular, the current WebAssembly design doesn't allow sharing heaps between modules. It's a convenience API in the V8 implementation which may be removed in the future. In this experiment, limited dynamic linking is entirely done through JavaScript, which is acting as the dynamic linker / loader. This merely uses the WebAssembly object's capabilities as implemented today.
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            kandi-support Support

              musl has a low active ecosystem.
              It has 72 star(s) with 33 fork(s). There are 25 watchers for this library.
              OutlinedDot
              It had no major release in the last 6 months.
              There are 0 open issues and 13 have been closed. On average issues are closed in 302 days. There are no pull requests.
              It has a neutral sentiment in the developer community.
              The latest version of musl is current.

            kandi-Quality Quality

              musl has no bugs reported.

            kandi-Security Security

              musl has 7 vulnerability issues reported (4 critical, 2 high, 1 medium, 0 low).

            kandi-License License

              musl has a Non-SPDX License.
              Non-SPDX licenses can be open source with a non SPDX compliant license, or non open source licenses, and you need to review them closely before use.

            kandi-Reuse Reuse

              musl releases are not available. You will need to build from source code and install.
              Installation instructions are not available. Examples and code snippets are available.

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            musl Key Features

            No Key Features are available at this moment for musl.

            musl Examples and Code Snippets

            No Code Snippets are available at this moment for musl.

            Community Discussions

            QUESTION

            TimescaleDB: SELECT COUNT(*) slow on hypertable
            Asked 2021-Jun-13 at 05:10

            I have a hyper table for exchange candle data set up using TimescaleDB.

            • TimescaleDB official image timescale/timescaledb:latest-pg12 set up and running with Docker with the exact version string starting PostgreSQL 12.6 on x86_64-pc-linux-musl, compiled by gcc (Alpine 10.2.1_pre1) 10.2.1 20201203, 64-bit

            • Python 3 client

            • The table has 5 continuous aggregate views set up like here and around 15 colums

            Running the following query is slow (count query generated with SQLAlchemy):

            ...

            ANSWER

            Answered 2021-Jun-13 at 05:10

            you can try the approximate_row_count() function (https://docs.timescale.com/api/latest/analytics/approximate_row_count/) which gives an immediate result.

            Source https://stackoverflow.com/questions/67953098

            QUESTION

            Solved, NodeJS app with http-auth crashes after Webpack5
            Asked 2021-Jun-06 at 16:23

            I have a large NodeJS application that have been working just fine after beeing processed by Webpack-5. Now I added http-auth and then the application crashes.

            On https://github.com/MorganLindqvist/webpack5-http-auth-failure you can find a very minimalistic version of the app that crashes in the same when executed after Webpack5.

            Here is an example of when it works (without webpack 5) and then when it crashes (with webpack 5).

            ...

            ANSWER

            Answered 2021-Apr-05 at 23:14

            As it so happened, I ran into this issue today and found your question in an attempt to find a solution.

            After trying a few different things, I discovered that using version 4.1.2 of http-auth (instead of the current 4.1.4, which is what your package.json has set in your GitHub repo) worked for me. So it seems to be a bug with the newer http-auth versions. I ran your code in your github repo but with version 4.1.2 of http-auth and it ran successfully.

            Source https://stackoverflow.com/questions/66935848

            QUESTION

            Translate Dockerfile from python-alpine to python-slim-buster (debian-based)
            Asked 2021-Jun-03 at 14:07

            I am trying to improve the Dockerfile we use for deploying a Django-based app at work and first thing I would like to do is change the base image of python from alpine to slim-buster but I have to translate it to a debian-based image. I would like some suggestions on how I could translate it since I have zero to none experience with alpine. This is the original snippet from Docker.

            ...

            ANSWER

            Answered 2021-Jun-03 at 14:06

            You'd need to

            • use apt-get instead
            • find the equivalents of those packages in the Debian repositories

            Some of these will likely be wrong, but you get the gist.

            Source https://stackoverflow.com/questions/67822933

            QUESTION

            How to wait postgres db using go with docker?
            Asked 2021-Jun-02 at 06:57

            I deployed a go with gorm app using postgres by docker-compose.

            I did db creation and data migration by an another container service. Here only listed the app and db container issues.

            docker-compose.yml

            ...

            ANSWER

            Answered 2021-Jun-02 at 06:57

            you need to add the Time for waiting in your command:

            Source https://stackoverflow.com/questions/67799504

            QUESTION

            Numpy Multi-stage Container Build -- Alpine
            Asked 2021-May-26 at 14:24

            I'm attempting a multi-stage container build to try and keep my image smaller. The offending package is numpy which apparently doesn't play nicely with Alpine.

            My error from numpy:

            ...

            ANSWER

            Answered 2021-May-25 at 19:50

            This might be related to linking problem, which appears as 'not found' many times in Alpine Linux when something is wrong with symlinks. When you build your numpy dependencies in the Debian based distro, it is linked to glibc in specific path. Usually, similar paths are also in Alpine. I'm not sure how this works with venv.

            I would suggest that, as you managed (I think) to install numpy directly in Alpine based container, to use Alpine distro as builder as well. Otherwise you might need to change some linked paths manually.

            If you look for example folder /lib64 in Alpine, the ld-linux-x86-64.so.2 should be in there, so it is not totally missing. (after installing libc6-compat package).

            But in general, Alpine is not the best choice for Python as the programming language is based on C, and musl is not perfect. Alpine could be also much slower for Python

            Source https://stackoverflow.com/questions/67694006

            QUESTION

            What is the difference between alpine docker image and busybox docker image?
            Asked 2021-May-19 at 06:49

            What is the difference between alpine docker image and busybox docker image ?

            When I check their dockfiles, alpine is like this (for Alpine v3.12 - 3.12.7)

            ...

            ANSWER

            Answered 2021-May-18 at 14:22

            The key difference between these is that older versions of the busybox image statically linked busybox against glibc (current versions dynamically link busybox against glibc due to use of libnss even in static configuration), whereas the alpine image dynamically links against musl libc.

            Going into the weighting factors used to choose between these in detail would be off-topic here (software recommendation requests), but some key points:

            Comparing glibc against musl libc, a few salient points (though there are certainly many other factors as well):

            • glibc is built for performance and portability over size (often adding special-case performance optimizations that take a large amount of code).
            • musl libc is built for correctness and size over performance (it's willing to be somewhat slower to have a smaller code size and to run in less RAM); and it's much more aggressive about having correct error reporting (instead of just exiting immediately) in the face of resource exhaustion.
            • glibc is more widely used, so bugs that manifest against its implementation tend to be caught more quickly. Often, when one is the first person to build a given piece of software against musl, one will encounter bugs (typically in that software, not in musl) or places where the maintainer explicitly chose to use GNU extensions instead of sticking to the libc standard.
            • glibc is licensed under LGPL terms; only software under GPL-compatible terms can be statically linked against it; whereas musl is under a MIT license, and usable with fewer restrictions.

            Comparing the advantages of a static build against a dynamic build:

            • If your system image will only have a single binary executable (written in C or otherwise using a libc), a static build is always better, as it discards any parts of your libraries that aren't actually used by that one executable.
            • If your system image is intended to have more binaries added that are written in C, using dynamic linking will keep the overall size down, since it allows those binaries to use the libc that's already there.
            • If your system image is intended to have more binaries added in a language that doesn't use libc (this can be the case for Go and Rust, f/e), then you don't benefit from dynamic linking; you don't need the unused parts of libc there because you won't be using them anyhow.

            Honestly, these two images don't between themselves cover the whole matrix space of possibilities; there are situations where neither of them is optimal. There would be value to having an image with only busybox that statically links against musl libc (if everything you're going to add is in a non-C language), or an image with busybox that dynamically links against glibc (if you're going to add more binaries that need libc and aren't compatible with musl).

            Source https://stackoverflow.com/questions/67529042

            QUESTION

            django uwsgi logto function not work in docker
            Asked 2021-May-14 at 06:03

            dockerizing a django app with uwsgi

            uwsgi.ini

            ...

            ANSWER

            Answered 2021-May-14 at 06:03

            a few suggestions:

            • do not run uwsgi as root
            • threaded-logger = true is defined 2 times
            • log under /app/log, and mount it as a volume, with the proper permissions for the user
            • alpine images can run #!/bin/sh

            regards, matzy

            Source https://stackoverflow.com/questions/67056035

            QUESTION

            How to set axios baseURL for VueJS app if backend is in the same docker container
            Asked 2021-May-08 at 22:46

            I have the app deployed in one docker container:

            1. Frontend - VueJS (served by Nginx)
            2. Backend - Flask (gunicorn)

            Dockerfile:

            ...

            ANSWER

            Answered 2021-May-08 at 22:43

            You have exposed ports 80 and 5432, but not the port 5000 which is listened by backend application.

            Expose port 5000 and set baseUrl to :5000

            Source https://stackoverflow.com/questions/67450447

            QUESTION

            Avoid dynamic linking in dependencies
            Asked 2021-May-05 at 01:33

            I am developing a project against a custom linux and I am having troubles with dynamic dlls that are referenced by dependencies.

            Is there a way to know if a dependency has dynamic linked libraries before hand? Is it possible to somehow avoid those libraries? I want to have a static binary (MUSL didn’t work for me as one dependency doesn’t compile with it).

            Thanks

            ...

            ANSWER

            Answered 2021-May-05 at 01:33

            If you're compiling against glibc, you'll need to have at least some dynamic linking. While it is possible to statically link glibc, that isn't a supported configuration since the name service switch won't work in such a case.

            In general, you should expect a build-dependency on cc or pkg-config to be an indicator of the use of a C or C++ library. That isn't a guarantee either way, but it is probably going to be the case the vast majority of the time. Some of those libraries will be able to be linked statically, but of course if you do that you must recompile your code every time any of your dependencies has a security update or you'll have a vulnerability. There's unfortunately no clear way to tell whether static linking is an option in such a case other than looking at the build.rs or the documentation of the crate.

            Source https://stackoverflow.com/questions/67392686

            QUESTION

            Library wkhtmltopdf is not working inside Docker
            Asked 2021-Apr-28 at 19:13

            I have a code in Python Flask where I generate pdf files using an HTML template. The code works just fine when I run it alone, but when I try to run it inside a Docker container, as soon as I call the endpoint that generates the report the docker crashes and resets. It just stays loading then it returns an error (in Postman which I'm using to test).

            The code for the PDF is as follows:

            ...

            ANSWER

            Answered 2021-Apr-28 at 16:24

            Let's fix this.

            I've managed to run wkhtmltopdf isolated on a docker container.

            Dockerfile:

            Source https://stackoverflow.com/questions/67283831

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

            Vulnerabilities

            No vulnerabilities reported

            Install musl

            You can download it from GitHub.

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            For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .
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            gh repo clone jfbastien/musl

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            git@github.com:jfbastien/musl.git

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