Darwin

Is an atomic-rename possible in Mac VFS/HFS+?

由 限于喜欢 提交于 2020-01-11 13:25:14
问题 With support for ACLs in Mac OS X, there is a way to declare a file as writeable but non-deletable. This poses a problem with atomic writes, since the current implementation of rename in VFS delete s a pre-existing target. If you have an existing file, which you have write privileges on, it is possible to be unable to atomically write to: Simply attach an ACL that states deny delete and an atomic write (like implemented by various Cocoa APIs — e.g. NSArray's writeToFile:atomically:) will fail

如何在Go项目中输出版本信息？

由 此生再无相见时 提交于 2020-01-10 09:48:00
【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 我们经常在使用CLI工具的时候，都会有这样的参数输出： ➜ ~ docker version Client: Docker Engine - Community Version: 18.09.2 API version: 1.39 Go version: go1.10.8 Git commit: 6247962 Built: Sun Feb 10 04:12:39 2019 OS/Arch: darwin/amd64 Experimental: false ➜ ~ 可以打印出构建时对应的版本信息，比如 Version，Go Version，Git Commit等，这个是如何实现的呢？ 实现 主要是通过 ldflags 参数来实现在构建的时候对变量进行赋值。 比如下面一段代码： package main import ( "flag" "fmt" "os" ) //需要赋值的变量 var version = "" //通过flag包设置-version参数 var printVersion bool func init() { flag.BoolVar(&printVersion, "version", false, "print program build version") flag.Parse() }

Errors Merging a Git Submodule into its Parent Repository in OS X

由 断了今生、忘了曾经 提交于 2020-01-07 08:28:10
问题 I have cloned a parent repository ' objc4 ' from https://github.com/RandomDSdevel/objc4 to the local path ' /Volumes/Development/Repositories/objc4 .' This parent repository contains a submodule ' OBJC4-437.1-Runtime ' which I have set up to mirror the contents of https://github.com/macmade/OBJC4-437.1-Runtime at the local path ' /Volumes/Development/Repositories/objc4/runtime .' I would like to merge this submodule into its parent repository and have already attempted to do so using these

技术分享 | 如何使用 dbdeployer 快速搭建 MySQL 测试环境

由 倖福魔咒の 提交于 2020-01-06 23:21:22
【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 一、工具介绍 dbdeployer 是一款十分强大的数据库测试环境部署工具，可实现一键部署不同架构、不同版本的数据库环境。 如：MySQL 主从复制、GTID 模式复制、MySQL 组复制（单主模式、多主模式等）完整的数据库类型支持及版本，可在安装完 dbdeployer 后使用 dbdeployer admin capabilities 命令进行查看，以下是当前已支持数据库及组件类型 Oracle MySQL Percona MySQL MariaDB TiDB MySQL NDB Cluster Percona XtraDB Cluster mysql-shell 本文主要介绍基于 dbdeployer 工具快速搭建 MySQL 测试环境以及 dbdeployer 的基础使用。完整的功能特性以及使用方式可查看 dbdeployer 文档手册，dbdeployer 的文档手册十分详细的介绍了该工具特性及各类使用方式，可查看文末的相关链接。 二、工具安装 本文以 MacOS 下部署为例，Linux 平台安装部署方式基本类似**（该工具不提供 Windows 版本）**，可访问 https://github.com/datacharmer/dbdeployer/releases 获取最新版 dbdeployer

golang常用命令

由 眉间皱痕 提交于 2020-01-06 15:56:15
【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> Go命令教程 (访问密码：kmNYam) Go命令教程 build compile packages and dependencies clean remove object files doc show documentation for package or symbol env print Go environment information fix run go tool fix on packages fmt run gofmt on package sources generate generate Go files by processing source get download and install packages and dependencies install compile and install packages and dependencies list list packages run compile and run Go program test test packages tool run specified go tool version print Go version vet run go tool vet on packages go build go build

Is there an equivalent of lsusb for OS X

由 老子叫甜甜 提交于 2019-12-31 07:59:45
问题 This question seems to be all over google, but the answers all point to using System Profiler. That's nice, but with System Profiler all you get is something that looks like this: DasKeyboard: Product ID: 0x1919 Vendor ID: 0x04d9 (Holtek Semiconductor, Inc.) Version: 1.06 Speed: Up to 1.5 Mb/sec Location ID: 0x1d114000 / 11 Current Available (mA): 500 Current Required (mA): 100 USB2.0 Hub: Product ID: 0x0608 Vendor ID: 0x05e3 (Genesys Logic, Inc.) Version: 32.98 Speed: Up to 480 Mb/sec

make fails while installing Valgrind

由 被刻印的时光 ゝ 提交于 2019-12-28 05:57:28
问题 I'm trying to install Valgrind on a Mac with Snow Leopard but am getting an error. This is what I'm typing into Terminal. $ curl -O http://valgrind.org/downloads/valgrind-3.8.1.tar.bz2 $ md5sum valgrind-3.8.1.tar.bz2 $ tar -xjvf valgrind-3.8.1.tar.bz2 $ cd valgrind-3.8.1 $ ./configure $ make This is the error I get. Making all in coregrind make[2]: *** No rule to make target `/usr/include/mach/mach_vm.defs', needed by `m_mach/mach_vmUser.c'. Stop. make[1]: *** [all-recursive] Error 1 make: **

What type of threads does OS X have?

由 我怕爱的太早我们不能终老 提交于 2019-12-23 15:49:40
问题 Kernel-level threads (like Linux and some *BSD systems) or something else? If there is any difference, I'm using pthreads. 回答1: They are Mach threads. 回答2: Old question, but could use some more detail and accuracy: The underlying threads in XNU (the OS X and iOS kernel) are indeed Mach threads, but these are generally hidden from user mode. Instead, there are BSD threads (also known as uthreads) over them, which are more accessible via the system calls (such as #360, bsdthread_create, and

What is the equivalent of /proc/self/exe on Macintosh OS X Mavericks?

由 浪子不回头ぞ 提交于 2019-12-23 02:44:38
问题 I'm porting a Linux C++03 application to Darwin OS X and have some code that reads the symbolic link at /proc/self/exe to determine the directory in which the executable running is located. How can I compute the directory of the current executable running on Macintosh Darwin OS X Mavericks in C++? Here is my existing code that works on Linux: bool resolveBinaryLocation(string &binaryDirname) { // Read the symbolic link '/proc/self/exe'. const char *linkName = "/proc/self/exe"; const size_t

iPhone Objective-c detect Screen Lock

由 岁酱吖の 提交于 2019-12-22 06:37:20
问题 I'm new to make iPhone App with Objective-c I want to make the App which sends a notification when iPhone screen is locked(Pressed Lock button) How can I make this app? I'm trying to make it using "applicationWillSuspend", but /*----------------------------------------*/ - (void)applicationWillSuspend { NSLog(@"WillSuspend"); } /*----------------------------------------*/ This code doesn't work I'm not sure when applicationWillSuspend is called Please, give me some knowledge #import
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