{"id":12473,"date":"2024-03-14T15:56:40","date_gmt":"2024-03-14T15:56:40","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/what-is-the-usage-of-the-usleep-function-in-linux\/"},"modified":"2025-08-05T01:59:17","modified_gmt":"2025-08-05T01:59:17","slug":"what-is-the-usage-of-the-usleep-function-in-linux","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/what-is-the-usage-of-the-usleep-function-in-linux\/","title":{"rendered":"usleep Linux: Microsecond Sleep Function"},"content":{"rendered":"<p>The usleep function is used in Linux to pause program execution for a specified number of microseconds, in order to create a timing effect or control the speed of the program.<\/p>\n<p>The usage of the usleep function is as follows:<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;unistd.h&gt;<\/span><\/span>\r\n\r\n<span class=\"hljs-type\">int<\/span> <span class=\"hljs-title function_\">usleep<\/span><span class=\"hljs-params\">(<span class=\"hljs-type\">useconds_t<\/span> microseconds)<\/span>;\r\n<\/code><\/pre>\n<p>The parameter &#8220;microseconds&#8221; indicates the number of microseconds to wait, and its type is useconds_t, typically defined as an unsigned int.<\/p>\n<p>After calling the usleep function, the program will pause execution for the specified number of microseconds and then continue. It is important to note that the usleep function may have some margin of error and may not be available on certain systems.<\/p>\n<p>Original sentence: \u6211\u4eec\u5fc5\u987b\u91c7\u53d6\u63aa\u65bd\u6765\u4fdd\u62a4\u73af\u5883\u3002<\/p>\n<p>Paraphrased sentence: We need to take measures to protect the environment.<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;stdio.h&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;unistd.h&gt;<\/span><\/span>\r\n\r\n<span class=\"hljs-type\">int<\/span> <span class=\"hljs-title function_\">main<\/span><span class=\"hljs-params\">()<\/span> {\r\n    <span class=\"hljs-built_in\">printf<\/span>(<span class=\"hljs-string\">\"Start\\n\"<\/span>);\r\n    usleep(<span class=\"hljs-number\">2000000<\/span>); <span class=\"hljs-comment\">\/\/ \u6682\u505c2\u79d2<\/span>\r\n    <span class=\"hljs-built_in\">printf<\/span>(<span class=\"hljs-string\">\"End\\n\"<\/span>);\r\n    <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-number\">0<\/span>;\r\n}\r\n<\/code><\/pre>\n<p>The program example above will print &#8220;Start&#8221;, pause for 2 seconds, and finally print &#8220;End&#8221;.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The usleep function is used in Linux to pause program execution for a specified number of microseconds, in order to create a timing effect or control the speed of the program. The usage of the usleep function is as follows: #include &lt;unistd.h&gt; int usleep(useconds_t microseconds); The parameter &#8220;microseconds&#8221; indicates the number of microseconds to wait, [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[381,297,16363,16364,12521],"class_list":["post-12473","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-c-programming","tag-linux","tag-microseconds","tag-unistd-h","tag-usleep"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>usleep Linux: Microsecond Sleep Function - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"Learn how usleep in Linux pauses program execution in microseconds. 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