众所周知，OS X 10.10.3 问题多多，其中用来取代 mDNSResponder 的 discoveryd 常常出现 CPU 占用过高，无法正常工作的情况。
下面有一段简单的 Shell 脚本用以循环检查
discoveryd 是否出现问题，并自动重启它。需要管理员权限启动，可选的第一个参数是限制的最高 CPU 使用率（默认 80）。
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0-1.06Z"></path> </svg> </button> <div aria-atomic="true" role="alert" class="js-flash-alert"> <div>{{ message }}</div> </div> </div> </div> </template> </div> <include-fragment class="js-notification-shelf-include-fragment" data-base-src="https://github.com/notifications/beta/shelf"></include-fragment> <div class="application-main " data-commit-hovercards-enabled data-discussion-hovercards-enabled data-issue-and-pr-hovercards-enabled > <div itemscope itemtype="http://schema.org/Code"> <main id="gist-pjax-container"> <div class="gist-detail-intro gist-banner pb-3"> <div class="text-center container-lg px-3"> <p class="lead"> Instantly share code, notes, and snippets. </p> </div> </div> <div class="gisthead pagehead pb-0 pt-3 mb-4"> <div class="px-0"> <div class="mb-3 d-flex px-3 px-md-3 px-lg-5"> <div class="flex-auto min-width-0 width-fit mr-3"> <div class="d-flex"> <div class="d-none d-md-block"> <a class="mr-2 flex-shrink-0" data-hovercard-type="user" data-hovercard-url="/users/Jamesits/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="/Jamesits"><img class="avatar avatar-user" src="https://avatars.githubusercontent.com/u/1297257?s=64&v=4" width="32" height="32" alt="@Jamesits" /></a> </div> <div class="d-flex flex-column width-full"> <div class="d-flex flex-row width-full"> <h1 class="wb-break-word f3 text-normal mb-md-0 mb-1"> <span class="author"><a data-hovercard-type="user" data-hovercard-url="/users/Jamesits/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="/Jamesits">Jamesits</a></span><!-- --><span class="mx-1 color-fg-muted">/</span><!-- --><strong itemprop="name" class="css-truncate-target mr-1" style="max-width: 410px"><a href="/Jamesits/f5fb11af7c1b5cdd292b">discoveryd_checker.sh</a></strong> </h1> </div> <div class="note m-0"> Last active <relative-time tense="past" datetime="2015-08-29T14:19:55Z" data-view-component="true">August 29, 2015 14:19</relative-time> </div> </div> </div> </div> <ul class="d-md-flex pagehead-actions float-none mr-2"> </ul> <div class="d-inline-block d-md-none ml-auto"> <action-menu data-select-variant="none" data-view-component="true" class="flex-self-start ml-auto d-inline-block"> <focus-group direction="vertical" mnemonics retain> <button id="gist_options-button" popovertarget="gist_options-overlay" aria-controls="gist_options-list" aria-haspopup="true" aria-labelledby="tooltip-097a970d-73cd-409f-973c-1d2522af430c" type="button" data-view-component="true" class="Button Button--iconOnly Button--secondary Button--small"> <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-kebab-horizontal Button-visual"> <path d="M8 9a1.5 1.5 0 1 0 0-3 1.5 1.5 0 0 0 0 3ZM1.5 9a1.5 1.5 0 1 0 0-3 1.5 1.5 0 0 0 0 3Zm13 0a1.5 1.5 0 1 0 0-3 1.5 1.5 0 0 0 0 3Z"></path> </svg> </button><tool-tip id="tooltip-097a970d-73cd-409f-973c-1d2522af430c" for="gist_options-button" popover="manual" data-direction="s" data-type="label" data-view-component="true" class="sr-only position-absolute">Show Gist options</tool-tip> <anchored-position id="gist_options-overlay" anchor="gist_options-button" align="start" side="outside-bottom" anchor-offset="normal" popover="auto" data-view-component="true"> <div data-view-component="true" class="Overlay Overlay--size-auto"> <div data-view-component="true" class="Overlay-body Overlay-body--paddingNone"> <action-list> <div data-view-component="true"> <ul aria-labelledby="gist_options-button" id="gist_options-list" role="menu" data-view-component="true" class="ActionListWrap--inset ActionListWrap"> <li rel="nofollow" data-hydro-click="{"event_type":"clone_or_download.click","payload":{"feature_clicked":"DOWNLOAD_ZIP","git_repository_type":"GIST","gist_id":21790348,"originating_url":"https://gist.github.com/Jamesits/f5fb11af7c1b5cdd292b","user_id":null}}" data-hydro-click-hmac="5eef28afa1cd7fc9bac48cc06cd3183173803df3359f46e96b6c6596ad6f4d68" data-ga-click="Gist, download zip, location:gist overview" data-targets="action-list.items" data-item-id="download_from_gist_options" role="none" data-view-component="true" class="ActionListItem"> <a tabindex="-1" id="item-5360cfde-92a3-4527-9060-a26744a4e608" href="/Jamesits/f5fb11af7c1b5cdd292b/archive/81d2b29c4f49581f48c0c069bf8392c1c2205581.zip" role="menuitem" data-view-component="true" class="ActionListContent"> <span data-view-component="true" class="ActionListItem-label"> Download ZIP </span></a> </li> </ul> </div></action-list> </div> </div></anchored-position> </focus-group> </action-menu> </div> <ul class="d-md-flex d-none pagehead-actions float-none"> <li> <a id="gist-star-button" href="/login?return_to=https%3A%2F%2Fgist.github.com%2FJamesits%2Ff5fb11af7c1b5cdd292b" rel="nofollow" data-hydro-click="{"event_type":"authentication.click","payload":{"location_in_page":"gist star button","repository_id":null,"auth_type":"LOG_IN","originating_url":"https://gist.github.com/Jamesits/f5fb11af7c1b5cdd292b","user_id":null}}" data-hydro-click-hmac="db0b0b2bc0cddce4e4bb2a761b4be041afb7e902327fc76691c32fe726006180" aria-label="You must be signed in to star a gist" data-view-component="true" class="btn-with-count Button--secondary Button--small Button"> <span class="Button-content"> <span class="Button-visual Button-leadingVisual"> <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-star"> <path d="M8 .25a.75.75 0 0 1 .673.418l1.882 3.815 4.21.612a.75.75 0 0 1 .416 1.279l-3.046 2.97.719 4.192a.751.751 0 0 1-1.088.791L8 12.347l-3.766 1.98a.75.75 0 0 1-1.088-.79l.72-4.194L.818 6.374a.75.75 0 0 1 .416-1.28l4.21-.611L7.327.668A.75.75 0 0 1 8 .25Zm0 2.445L6.615 5.5a.75.75 0 0 1-.564.41l-3.097.45 2.24 2.184a.75.75 0 0 1 .216.664l-.528 3.084 2.769-1.456a.75.75 0 0 1 .698 0l2.77 1.456-.53-3.084a.75.75 0 0 1 .216-.664l2.24-2.183-3.096-.45a.75.75 0 0 1-.564-.41L8 2.694Z"></path> </svg> </span> <span class="Button-label">Star</span> <span class="Button-visual Button-trailingVisual"> <span title="1" data-view-component="true" class="Counter">1</span> </span> </span> </a><tool-tip id="tooltip-ec390270-4938-4e7d-bd37-acc81a35f3dc" for="gist-star-button" popover="manual" data-direction="n" data-type="description" data-view-component="true" class="sr-only position-absolute">You must be signed in to star a gist</tool-tip> </li> <li> <a id="gist-fork-button" href="/login?return_to=https%3A%2F%2Fgist.github.com%2FJamesits%2Ff5fb11af7c1b5cdd292b" rel="nofollow" data-hydro-click="{"event_type":"authentication.click","payload":{"location_in_page":"gist fork button","repository_id":null,"auth_type":"LOG_IN","originating_url":"https://gist.github.com/Jamesits/f5fb11af7c1b5cdd292b","user_id":null}}" data-hydro-click-hmac="965add673c108413d91bdaa55935b989e4f8bc620ee9caaa5ae06c92f696222c" aria-label="You must be signed in to fork a gist" data-view-component="true" class="btn-with-count Button--secondary Button--small Button"> <span class="Button-content"> <span class="Button-visual Button-leadingVisual"> <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-repo-forked"> <path d="M5 5.372v.878c0 .414.336.75.75.75h4.5a.75.75 0 0 0 .75-.75v-.878a2.25 2.25 0 1 1 1.5 0v.878a2.25 2.25 0 0 1-2.25 2.25h-1.5v2.128a2.251 2.251 0 1 1-1.5 0V8.5h-1.5A2.25 2.25 0 0 1 3.5 6.25v-.878a2.25 2.25 0 1 1 1.5 0ZM5 3.25a.75.75 0 1 0-1.5 0 .75.75 0 0 0 1.5 0Zm6.75.75a.75.75 0 1 0 0-1.5.75.75 0 0 0 0 1.5Zm-3 8.75a.75.75 0 1 0-1.5 0 .75.75 0 0 0 1.5 0Z"></path> </svg> </span> <span class="Button-label">Fork</span> <span class="Button-visual Button-trailingVisual"> <span title="0" data-view-component="true" class="Counter">0</span> </span> </span> </a><tool-tip id="tooltip-81f94407-545b-4a04-94d0-27d239afa5f6" for="gist-fork-button" popover="manual" data-direction="n" data-type="description" data-view-component="true" class="sr-only position-absolute">You must be signed in to fork a gist</tool-tip> </li> </ul> </div> <ul class="d-flex d-md-none px-3 mb-2 pagehead-actions float-none" > <li> <div data-view-component="true" class="flex-items-center d-inline-flex"> <action-menu data-menu-input="gist-share-url-sized-down" data-select-variant="single" data-dynamic-label="" data-view-component="true" class="flex-shrink-0"> <focus-group direction="vertical" mnemonics retain> <button id="action-menu-325f1829-7659-4a75-aab2-fce6ea91148f-button" popovertarget="action-menu-325f1829-7659-4a75-aab2-fce6ea91148f-overlay" aria-controls="action-menu-325f1829-7659-4a75-aab2-fce6ea91148f-list" aria-haspopup="true" type="button" data-view-component="true" class="rounded-right-0 border-right-0 Button--secondary Button--small Button"> <span class="Button-content"> <span class="Button-label">Embed</span> </span> <span class="Button-visual Button-trailingAction"> <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-triangle-down"> <path d="m4.427 7.427 3.396 3.396a.25.25 0 0 0 .354 0l3.396-3.396A.25.25 0 0 0 11.396 7H4.604a.25.25 0 0 0-.177.427Z"></path> </svg> </span> </button> <anchored-position id="action-menu-325f1829-7659-4a75-aab2-fce6ea91148f-overlay" anchor="action-menu-325f1829-7659-4a75-aab2-fce6ea91148f-button" align="start" side="outside-bottom" anchor-offset="normal" popover="auto" data-view-component="true"> <div data-view-component="true" class="Overlay Overlay--size-auto"> <div data-view-component="true" class="Overlay-body Overlay-body--paddingNone"> <action-list> <div data-view-component="true"> <ul aria-labelledby="action-menu-325f1829-7659-4a75-aab2-fce6ea91148f-button" id="action-menu-325f1829-7659-4a75-aab2-fce6ea91148f-list" role="menu" data-view-component="true" class="ActionListWrap--inset ActionListWrap"> <li data-targets="action-list.items" role="none" data-view-component="true" class="ActionListItem"> <button value="<script src="https://gist.github.com/Jamesits/f5fb11af7c1b5cdd292b.js"></script>" tabindex="-1" data-hydro-click="{"event_type":"clone_or_download.click","payload":{"feature_clicked":"EMBED","git_repository_type":"GIST","gist_id":21790348,"originating_url":"https://gist.github.com/Jamesits/f5fb11af7c1b5cdd292b","user_id":null}}" data-hydro-click-hmac="a4cac4ba9573138b5f545fb138becbe597d00737f4e35f181fb570d4d2e83511" id="item-21074ca7-33e7-477f-8757-fd785ee7daa7" type="button" role="menuitemradio" aria-checked="true" data-view-component="true" class="ActionListContent"> <span class="ActionListItem-visual ActionListItem-action--leading"> <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-check ActionListItem-singleSelectCheckmark"> <path d="M13.78 4.22a.75.75 0 0 1 0 1.06l-7.25 7.25a.75.75 0 0 1-1.06 0L2.22 9.28a.751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018L6 10.94l6.72-6.72a.75.75 0 0 1 1.06 0Z"></path> </svg> </span> <span data-view-component="true" class="ActionListItem-descriptionWrap"> <span data-view-component="true" class="ActionListItem-label"> Embed </span> <span class="ActionListItem-description"> Embed this gist in your website. </span> </span></button> </li> <li data-targets="action-list.items" role="none" data-view-component="true" class="ActionListItem"> <button value="https://gist.github.com/Jamesits/f5fb11af7c1b5cdd292b" tabindex="-1" data-hydro-click="{"event_type":"clone_or_download.click","payload":{"feature_clicked":"SHARE","git_repository_type":"GIST","gist_id":21790348,"originating_url":"https://gist.github.com/Jamesits/f5fb11af7c1b5cdd292b","user_id":null}}" data-hydro-click-hmac="457e638b89fa667cf90252aee638e3689ddd0706cd135ac5b1879f587198e649" id="item-a33fccec-89bb-4e1c-8aab-0442b77cf95e" type="button" role="menuitemradio" aria-checked="false" data-view-component="true" class="ActionListContent"> <span class="ActionListItem-visual ActionListItem-action--leading"> <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-check ActionListItem-singleSelectCheckmark"> <path d="M13.78 4.22a.75.75 0 0 1 0 1.06l-7.25 7.25a.75.75 0 0 1-1.06 0L2.22 9.28a.751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018L6 10.94l6.72-6.72a.75.75 0 0 1 1.06 0Z"></path> </svg> </span> <span data-view-component="true" class="ActionListItem-descriptionWrap"> <span data-view-component="true" class="ActionListItem-label"> Share </span> <span class="ActionListItem-description"> Copy sharable link for this gist. </span> </span></button> </li> <li data-targets="action-list.items" role="none" data-view-component="true" class="ActionListItem"> <button value="https://gist.github.com/f5fb11af7c1b5cdd292b.git" tabindex="-1" data-hydro-click="{"event_type":"clone_or_download.click","payload":{"feature_clicked":"USE_HTTPS","git_repository_type":"GIST","gist_id":21790348,"originating_url":"https://gist.github.com/Jamesits/f5fb11af7c1b5cdd292b","user_id":null}}" data-hydro-click-hmac="a4b962cc262c7354ec168cbfc4fd8dd7718ef7f697c68e5cb803dc9ca8d7d196" id="item-dc562bc3-6681-4840-8a2f-27b573d3e3df" type="button" role="menuitemradio" aria-checked="false" data-view-component="true" class="ActionListContent"> <span class="ActionListItem-visual ActionListItem-action--leading"> <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-check ActionListItem-singleSelectCheckmark"> <path d="M13.78 4.22a.75.75 0 0 1 0 1.06l-7.25 7.25a.75.75 0 0 1-1.06 0L2.22 9.28a.751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018L6 10.94l6.72-6.72a.75.75 0 0 1 1.06 0Z"></path> </svg> </span> <span data-view-component="true" class="ActionListItem-descriptionWrap"> <span data-view-component="true" class="ActionListItem-label"> Clone via HTTPS </span> <span class="ActionListItem-description"> Clone using the web URL. </span> </span></button> </li> <li role="presentation" aria-hidden="true" data-view-component="true" class="ActionList-sectionDivider"></li> <li target="_blank" rel="noopener noreferrer" data-targets="action-list.items" role="none" data-view-component="true" class="ActionListItem"> <a tabindex="-1" id="item-e62624ff-798c-4e21-8f12-0fde0e87ba88" href="https://docs.github.com/articles/which-remote-url-should-i-use" role="menuitemradio" aria-checked="false" 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1.15-.205.307-.47.513-.692.662-.109.072-.22.138-.313.195l-.006.004a6.24 6.24 0 0 0-.26.16.952.952 0 0 0-.276.245.75.75 0 0 1-1.248-.832c.184-.264.42-.489.692-.661.103-.067.207-.132.313-.195l.007-.004c.1-.061.182-.11.258-.161a.969.969 0 0 0 .277-.245C8.96 6.514 9 6.427 9 6.25a.612.612 0 0 0-.262-.525A1.27 1.27 0 0 0 8 5.5c-.369 0-.595.09-.74.187a1.01 1.01 0 0 0-.34.398ZM9 11a1 1 0 1 1-2 0 1 1 0 0 1 2 0Z"></path> </svg> </span> <span data-view-component="true" class="ActionListItem-label"> Learn more about clone URLs </span></a> </li> </ul> </div></action-list> </div> </div></anchored-position> </focus-group> </action-menu> <primer-text-field class="FormControl width-full FormControl--fullWidth"> <label for="gist-share-url-sized-down" class="sr-only FormControl-label"> Clone this repository at <script src="https://gist.github.com/Jamesits/f5fb11af7c1b5cdd292b.js"></script> </label> <div class="FormControl-input-wrap FormControl-input-wrap--small"> <input id="gist-share-url-sized-down" 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<span data-view-component="true" class="ActionListItem-descriptionWrap"> <span data-view-component="true" class="ActionListItem-label"> Share </span> <span class="ActionListItem-description"> Copy sharable link for this gist. </span> </span></button> </li> <li data-targets="action-list.items" role="none" data-view-component="true" class="ActionListItem"> <button value="https://gist.github.com/f5fb11af7c1b5cdd292b.git" tabindex="-1" data-hydro-click="{"event_type":"clone_or_download.click","payload":{"feature_clicked":"USE_HTTPS","git_repository_type":"GIST","gist_id":21790348,"originating_url":"https://gist.github.com/Jamesits/f5fb11af7c1b5cdd292b","user_id":null}}" data-hydro-click-hmac="a4b962cc262c7354ec168cbfc4fd8dd7718ef7f697c68e5cb803dc9ca8d7d196" id="item-7cafc390-d1ee-4fb5-b062-648b9e6ec5eb" type="button" role="menuitemradio" aria-checked="false" data-view-component="true" class="ActionListContent"> <span class="ActionListItem-visual ActionListItem-action--leading"> <svg 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itemprop="about"> Check if discoveryd on OS X 10.10.3 has too high CPU usage and restart it. </div> <div class="js-gist-file-update-container js-task-list-container"> <div id="file-discoveryd_checker-sh" class="file my-2"> <div class="file-header d-flex flex-md-items-center flex-items-start"> <div class="file-actions flex-order-2 pt-0"> <a href="/Jamesits/f5fb11af7c1b5cdd292b/raw/81d2b29c4f49581f48c0c069bf8392c1c2205581/discoveryd_checker.sh" data-view-component="true" class="Button--secondary Button--small Button"> <span class="Button-content"> <span class="Button-label">Raw</span> </span> </a> </div> <div class="file-info pr-4 d-flex flex-md-items-center flex-items-start flex-order-1 flex-auto"> <span class="mr-1"> <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-code-square color-fg-muted"> <path d="M0 1.75C0 .784.784 0 1.75 0h12.5C15.216 0 16 .784 16 1.75v12.5A1.75 1.75 0 0 1 14.25 16H1.75A1.75 1.75 0 0 1 0 14.25Zm1.75-.25a.25.25 0 0 0-.25.25v12.5c0 .138.112.25.25.25h12.5a.25.25 0 0 0 .25-.25V1.75a.25.25 0 0 0-.25-.25Zm7.47 3.97a.75.75 0 0 1 1.06 0l2 2a.75.75 0 0 1 0 1.06l-2 2a.749.749 0 0 1-1.275-.326.749.749 0 0 1 .215-.734L10.69 8 9.22 6.53a.75.75 0 0 1 0-1.06ZM6.78 6.53 5.31 8l1.47 1.47a.749.749 0 0 1-.326 1.275.749.749 0 0 1-.734-.215l-2-2a.75.75 0 0 1 0-1.06l2-2a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042Z"></path> </svg> </span> <a class="wb-break-all" href="#file-discoveryd_checker-sh"> <strong class="user-select-contain gist-blob-name css-truncate-target"> discoveryd_checker.sh </strong> </a> </div> </div> <div itemprop="text" class="Box-body p-0 blob-wrapper data type-shell gist-border-0"> <div class="js-check-bidi js-blob-code-container blob-code-content"> <template class="js-file-alert-template"> <div data-view-component="true" class="flash flash-warn flash-full d-flex flex-items-center"> <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-alert"> <path d="M6.457 1.047c.659-1.234 2.427-1.234 3.086 0l6.082 11.378A1.75 1.75 0 0 1 14.082 15H1.918a1.75 1.75 0 0 1-1.543-2.575Zm1.763.707a.25.25 0 0 0-.44 0L1.698 13.132a.25.25 0 0 0 .22.368h12.164a.25.25 0 0 0 .22-.368Zm.53 3.996v2.5a.75.75 0 0 1-1.5 0v-2.5a.75.75 0 0 1 1.5 0ZM9 11a1 1 0 1 1-2 0 1 1 0 0 1 2 0Z"></path> </svg> <span> This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. <a class="Link--inTextBlock" href="https://github.co/hiddenchars" target="_blank">Learn more about bidirectional Unicode characters</a> </span> <div data-view-component="true" class="flash-action"> <a href="{{ revealButtonHref }}" data-view-component="true" class="btn-sm btn"> Show hidden characters </a> </div> </div></template> <template class="js-line-alert-template"> <span aria-label="This line has hidden Unicode characters" data-view-component="true" class="line-alert tooltipped tooltipped-e"> <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-alert"> <path d="M6.457 1.047c.659-1.234 2.427-1.234 3.086 0l6.082 11.378A1.75 1.75 0 0 1 14.082 15H1.918a1.75 1.75 0 0 1-1.543-2.575Zm1.763.707a.25.25 0 0 0-.44 0L1.698 13.132a.25.25 0 0 0 .22.368h12.164a.25.25 0 0 0 .22-.368Zm.53 3.996v2.5a.75.75 0 0 1-1.5 0v-2.5a.75.75 0 0 1 1.5 0ZM9 11a1 1 0 1 1-2 0 1 1 0 0 1 2 0Z"></path> </svg> </span></template> <table data-hpc class="highlight tab-size js-file-line-container js-code-nav-container js-tagsearch-file" data-tab-size="8" data-paste-markdown-skip data-tagsearch-lang="Shell" data-tagsearch-path="discoveryd_checker.sh"> <tr> <td id="file-discoveryd_checker-sh-L1" class="blob-num js-line-number js-code-nav-line-number js-blob-rnum" data-line-number="1"></td> <td id="file-discoveryd_checker-sh-LC1" class="blob-code blob-code-inner js-file-line">#!/bin/bash</td> </tr> <tr> <td id="file-discoveryd_checker-sh-L2" class="blob-num js-line-number js-code-nav-line-number js-blob-rnum" data-line-number="2"></td> <td id="file-discoveryd_checker-sh-LC2" class="blob-code blob-code-inner js-file-line"> </td> </tr> <tr> <td id="file-discoveryd_checker-sh-L3" class="blob-num js-line-number js-code-nav-line-number js-blob-rnum" data-line-number="3"></td> <td id="file-discoveryd_checker-sh-LC3" class="blob-code blob-code-inner js-file-line"># Copyright (c) 2015, James Swineson <[email protected]></td> </tr> <tr> <td id="file-discoveryd_checker-sh-L4" class="blob-num js-line-number js-code-nav-line-number js-blob-rnum" data-line-number="4"></td> <td id="file-discoveryd_checker-sh-LC4" class="blob-code blob-code-inner js-file-line"># </td> </tr> <tr> <td id="file-discoveryd_checker-sh-L5" class="blob-num js-line-number js-code-nav-line-number js-blob-rnum" data-line-number="5"></td> <td id="file-discoveryd_checker-sh-LC5" class="blob-code blob-code-inner js-file-line"># Permission to use, copy, modify, and/or distribute this software for any</td> </tr> <tr> <td id="file-discoveryd_checker-sh-L6" class="blob-num js-line-number js-code-nav-line-number js-blob-rnum" data-line-number="6"></td> <td id="file-discoveryd_checker-sh-LC6" class="blob-code blob-code-inner js-file-line"># purpose with or without fee is hereby granted, provided that the above</td> </tr> <tr> <td id="file-discoveryd_checker-sh-L7" class="blob-num js-line-number js-code-nav-line-number js-blob-rnum" data-line-number="7"></td> <td id="file-discoveryd_checker-sh-LC7" class="blob-code blob-code-inner js-file-line"># copyright notice and this permission notice appear in all copies.</td> </tr> <tr> <td id="file-discoveryd_checker-sh-L8" class="blob-num js-line-number js-code-nav-line-number js-blob-rnum" data-line-number="8"></td> <td id="file-discoveryd_checker-sh-LC8" class="blob-code blob-code-inner js-file-line"># </td> </tr> <tr> <td id="file-discoveryd_checker-sh-L9" class="blob-num js-line-number js-code-nav-line-number js-blob-rnum" data-line-number="9"></td> <td id="file-discoveryd_checker-sh-LC9" class="blob-code blob-code-inner js-file-line"># THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH</td> </tr> <tr> <td id="file-discoveryd_checker-sh-L10" class="blob-num js-line-number js-code-nav-line-number js-blob-rnum" data-line-number="10"></td> <td id="file-discoveryd_checker-sh-LC10" class="blob-code blob-code-inner js-file-line"># REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY</td> </tr> <tr> <td id="file-discoveryd_checker-sh-L11" class="blob-num js-line-number js-code-nav-line-number js-blob-rnum" data-line-number="11"></td> <td id="file-discoveryd_checker-sh-LC11" class="blob-code blob-code-inner js-file-line"># AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,</td> </tr> <tr> <td id="file-discoveryd_checker-sh-L12" class="blob-num js-line-number js-code-nav-line-number js-blob-rnum" data-line-number="12"></td> <td id="file-discoveryd_checker-sh-LC12" class="blob-code blob-code-inner js-file-line"># INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM</td> </tr> <tr> <td id="file-discoveryd_checker-sh-L13" class="blob-num js-line-number js-code-nav-line-number js-blob-rnum" data-line-number="13"></td> <td id="file-discoveryd_checker-sh-LC13" class="blob-code blob-code-inner js-file-line"># LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR</td> </tr> <tr> <td id="file-discoveryd_checker-sh-L14" class="blob-num js-line-number js-code-nav-line-number js-blob-rnum" data-line-number="14"></td> <td id="file-discoveryd_checker-sh-LC14" class="blob-code blob-code-inner js-file-line"># OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR</td> </tr> <tr> <td id="file-discoveryd_checker-sh-L15" class="blob-num js-line-number js-code-nav-line-number js-blob-rnum" data-line-number="15"></td> <td id="file-discoveryd_checker-sh-LC15" class="blob-code blob-code-inner js-file-line"># PERFORMANCE OF THIS SOFTWARE.</td> </tr> <tr> <td id="file-discoveryd_checker-sh-L16" class="blob-num js-line-number js-code-nav-line-number js-blob-rnum" data-line-number="16"></td> <td id="file-discoveryd_checker-sh-LC16" class="blob-code blob-code-inner js-file-line"># </td> </tr> <tr> <td id="file-discoveryd_checker-sh-L17" class="blob-num js-line-number js-code-nav-line-number js-blob-rnum" data-line-number="17"></td> <td id="file-discoveryd_checker-sh-LC17" class="blob-code blob-code-inner js-file-line"># Gist URL: https://gist.github.com/Jamesits/f5fb11af7c1b5cdd292b</td> </tr> <tr> <td id="file-discoveryd_checker-sh-L18" class="blob-num js-line-number js-code-nav-line-number js-blob-rnum" data-line-number="18"></td> <td id="file-discoveryd_checker-sh-LC18" class="blob-code blob-code-inner js-file-line"># My blog post (in Chinese): </td> </tr> <tr> <td id="file-discoveryd_checker-sh-L19" class="blob-num js-line-number js-code-nav-line-number js-blob-rnum" data-line-number="19"></td> <td id="file-discoveryd_checker-sh-LC19" class="blob-code blob-code-inner js-file-line"># http://blog.swineson.me/restart-os-x-10-10-3-buggy-discoveryd-automatically/</td> </tr> <tr> <td id="file-discoveryd_checker-sh-L20" class="blob-num js-line-number js-code-nav-line-number js-blob-rnum" data-line-number="20"></td> <td id="file-discoveryd_checker-sh-LC20" class="blob-code blob-code-inner js-file-line"> </td> </tr> <tr> <td id="file-discoveryd_checker-sh-L21" class="blob-num js-line-number js-code-nav-line-number js-blob-rnum" data-line-number="21"></td> <td id="file-discoveryd_checker-sh-LC21" class="blob-code blob-code-inner js-file-line"># Check if root</td> </tr> <tr> <td id="file-discoveryd_checker-sh-L22" class="blob-num js-line-number js-code-nav-line-number js-blob-rnum" data-line-number="22"></td> <td id="file-discoveryd_checker-sh-LC22" class="blob-code blob-code-inner js-file-line">if [[ $EUID -ne 0 ]]; then</td> </tr> <tr> <td id="file-discoveryd_checker-sh-L23" class="blob-num js-line-number js-code-nav-line-number js-blob-rnum" data-line-number="23"></td> <td id="file-discoveryd_checker-sh-LC23" class="blob-code blob-code-inner js-file-line"> echo "This script must be run as root" 1>&2</td> </tr> <tr> <td id="file-discoveryd_checker-sh-L24" class="blob-num js-line-number js-code-nav-line-number js-blob-rnum" data-line-number="24"></td> <td id="file-discoveryd_checker-sh-LC24" class="blob-code blob-code-inner js-file-line"> exit 1</td> </tr> <tr> <td id="file-discoveryd_checker-sh-L25" class="blob-num js-line-number js-code-nav-line-number js-blob-rnum" data-line-number="25"></td> <td id="file-discoveryd_checker-sh-LC25" class="blob-code blob-code-inner js-file-line">fi</td> </tr> <tr> <td id="file-discoveryd_checker-sh-L26" class="blob-num js-line-number js-code-nav-line-number js-blob-rnum" data-line-number="26"></td> <td id="file-discoveryd_checker-sh-LC26" class="blob-code blob-code-inner js-file-line"> </td> </tr> <tr> <td id="file-discoveryd_checker-sh-L27" class="blob-num js-line-number js-code-nav-line-number js-blob-rnum" data-line-number="27"></td> <td id="file-discoveryd_checker-sh-LC27" class="blob-code blob-code-inner js-file-line"># Process max cpu usage arguments</td> </tr> <tr> <td id="file-discoveryd_checker-sh-L28" class="blob-num js-line-number js-code-nav-line-number js-blob-rnum" data-line-number="28"></td> <td id="file-discoveryd_checker-sh-LC28" class="blob-code blob-code-inner js-file-line">max_usage=80.0</td> </tr> <tr> <td id="file-discoveryd_checker-sh-L29" class="blob-num js-line-number js-code-nav-line-number js-blob-rnum" data-line-number="29"></td> <td id="file-discoveryd_checker-sh-LC29" class="blob-code blob-code-inner js-file-line">re='^[0-9]+([.][0-9]+)?$'</td> </tr> <tr> <td id="file-discoveryd_checker-sh-L30" class="blob-num js-line-number js-code-nav-line-number js-blob-rnum" data-line-number="30"></td> <td id="file-discoveryd_checker-sh-LC30" class="blob-code blob-code-inner js-file-line">if [[ $1 =~ $re ]] ; then</td> </tr> <tr> <td id="file-discoveryd_checker-sh-L31" class="blob-num js-line-number js-code-nav-line-number js-blob-rnum" data-line-number="31"></td> <td id="file-discoveryd_checker-sh-LC31" class="blob-code blob-code-inner js-file-line"> echo "Max allowed CPU usage:" $1</td> </tr> <tr> <td id="file-discoveryd_checker-sh-L32" class="blob-num js-line-number js-code-nav-line-number js-blob-rnum" data-line-number="32"></td> <td id="file-discoveryd_checker-sh-LC32" class="blob-code blob-code-inner js-file-line"> max_usage=$1</td> </tr> <tr> <td id="file-discoveryd_checker-sh-L33" class="blob-num js-line-number js-code-nav-line-number js-blob-rnum" data-line-number="33"></td> <td id="file-discoveryd_checker-sh-LC33" class="blob-code blob-code-inner js-file-line">fi</td> </tr> <tr> <td id="file-discoveryd_checker-sh-L34" class="blob-num js-line-number js-code-nav-line-number js-blob-rnum" data-line-number="34"></td> <td id="file-discoveryd_checker-sh-LC34" class="blob-code blob-code-inner js-file-line"> </td> </tr> <tr> <td id="file-discoveryd_checker-sh-L35" class="blob-num js-line-number js-code-nav-line-number js-blob-rnum" data-line-number="35"></td> <td id="file-discoveryd_checker-sh-LC35" class="blob-code blob-code-inner js-file-line"># Check real CPU usage</td> </tr> <tr> <td id="file-discoveryd_checker-sh-L36" class="blob-num js-line-number js-code-nav-line-number js-blob-rnum" data-line-number="36"></td> <td id="file-discoveryd_checker-sh-LC36" class="blob-code blob-code-inner js-file-line">while true; do</td> </tr> <tr> <td id="file-discoveryd_checker-sh-L37" class="blob-num js-line-number js-code-nav-line-number js-blob-rnum" data-line-number="37"></td> <td id="file-discoveryd_checker-sh-LC37" class="blob-code blob-code-inner js-file-line"> cpu_usage=$(ps -Aco command,pcpu | grep "discoveryd " | awk '{$1=""; sub(" ", ""); print}')</td> </tr> <tr> <td id="file-discoveryd_checker-sh-L38" class="blob-num js-line-number js-code-nav-line-number js-blob-rnum" data-line-number="38"></td> <td id="file-discoveryd_checker-sh-LC38" class="blob-code blob-code-inner js-file-line"> </td> </tr> <tr> <td id="file-discoveryd_checker-sh-L39" class="blob-num js-line-number js-code-nav-line-number js-blob-rnum" data-line-number="39"></td> <td id="file-discoveryd_checker-sh-LC39" class="blob-code blob-code-inner js-file-line"> if [ "${cpu_usage:-0}" \> $max_usage ] ; then</td> </tr> <tr> <td id="file-discoveryd_checker-sh-L40" class="blob-num js-line-number js-code-nav-line-number js-blob-rnum" data-line-number="40"></td> <td id="file-discoveryd_checker-sh-LC40" class="blob-code blob-code-inner js-file-line"> echo "Warning: discoveryd CPU Usage at" $cpu_usage ", killing..."</td> </tr> <tr> <td id="file-discoveryd_checker-sh-L41" class="blob-num js-line-number js-code-nav-line-number js-blob-rnum" data-line-number="41"></td> <td id="file-discoveryd_checker-sh-LC41" class="blob-code blob-code-inner js-file-line"> sudo killall discoveryd</td> </tr> <tr> <td id="file-discoveryd_checker-sh-L42" class="blob-num js-line-number js-code-nav-line-number js-blob-rnum" data-line-number="42"></td> <td id="file-discoveryd_checker-sh-LC42" class="blob-code blob-code-inner js-file-line"> fi</td> </tr> <tr> <td id="file-discoveryd_checker-sh-L43" class="blob-num js-line-number js-code-nav-line-number js-blob-rnum" data-line-number="43"></td> <td id="file-discoveryd_checker-sh-LC43" class="blob-code blob-code-inner js-file-line"> </td> </tr> <tr> <td id="file-discoveryd_checker-sh-L44" class="blob-num js-line-number js-code-nav-line-number js-blob-rnum" data-line-number="44"></td> <td id="file-discoveryd_checker-sh-LC44" class="blob-code blob-code-inner js-file-line"> sleep 5</td> </tr> <tr> <td id="file-discoveryd_checker-sh-L45" class="blob-num js-line-number js-code-nav-line-number js-blob-rnum" data-line-number="45"></td> <td id="file-discoveryd_checker-sh-LC45" class="blob-code blob-code-inner js-file-line">done</td> </tr> </table> </div> </div> </div> </div> <a name="comments"></a> <div class="js-quote-selection-container" data-quote-markdown=".js-comment-body"> <div class="js-discussion " > <div class="ml-md-6 pl-md-3 ml-0 pl-0"> <!-- Rendered timeline since 2015-08-29 07:19:55 --> <div id="partial-timeline-marker" class="js-timeline-marker js-updatable-content" data-last-modified="Sat, 29 Aug 2015 14:19:55 GMT" > </div> </div> <div class="discussion-timeline-actions"> <div data-view-component="true" class="flash flash-warn mt-3"> <a rel="nofollow" class="btn btn-primary" data-hydro-click="{"event_type":"authentication.click","payload":{"location_in_page":"signed out comment","repository_id":null,"auth_type":"SIGN_UP","originating_url":"https://gist.github.com/Jamesits/f5fb11af7c1b5cdd292b","user_id":null}}" data-hydro-click-hmac="496241ba4822767e08561f624ce29aad531faa90b62f81c2f01fc62842e52c90" href="/join?source=comment-gist">Sign up for free</a> <strong>to join this conversation on GitHub</strong>. 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Github Gist 地址：https://gist.github.com/Jamesits/f5fb11af7c1b5cdd292b
使用方法：
|
1 2 3 |
wget https://gist.githubusercontent.com/Jamesits/f5fb11af7c1b5cdd292b/raw/bcf649f14ab7d936dc41efb77325ee16bcb4a428/discoveryd_checker.sh chmod +x discoveryd_checker.sh sudo ./discoveryd_checker.sh |