{"id":4214,"date":"2012-01-30T12:17:50","date_gmt":"2012-01-30T17:17:50","guid":{"rendered":"http:\/\/mjtsai.com\/blog\/?p=4214"},"modified":"2012-01-30T12:18:27","modified_gmt":"2012-01-30T17:18:27","slug":"the-bintrue-command-and-copyright","status":"publish","type":"post","link":"https:\/\/mjtsai.com\/blog\/2012\/01\/30\/the-bintrue-command-and-copyright\/","title":{"rendered":"The \/bin\/true Command and Copyright"},"content":{"rendered":"<p><a href=\"http:\/\/trillian.mit.edu\/~jc\/humor\/ATT_Copyright_true.html\">John Chambers<\/a> (via <a href=\"https:\/\/twitter.com\/uliwitness\/status\/164019803714109440\">Uli Kusterer<\/a>):<\/p>\n<blockquote cite=\"http:\/\/trillian.mit.edu\/~jc\/humor\/ATT_Copyright_true.html\"><p>This is a &ldquo;dummy&rdquo; library program whose main function is to make it easy to write infinite loops (while true do &#8230;) in shells scripts. The &ldquo;true&rdquo; program does nothing; it merely exits with a zero exit status. This can be done with an empty file that&rsquo;s marked executable, and that&rsquo;s what it was in the earliest unix system libraries. Such an empty file will be interpreted as a shell script that does nothing, and since it does this successfully, the shell exits with a zero exit status.\n<\/p><\/blockquote>","protected":false},"excerpt":{"rendered":"<p>John Chambers (via Uli Kusterer): This is a &ldquo;dummy&rdquo; library program whose main function is to make it easy to write infinite loops (while true do &#8230;) in shells scripts. The &ldquo;true&rdquo; program does nothing; it merely exits with a zero exit status. This can be done with an empty file that&rsquo;s marked executable, and [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"apple_news_api_created_at":"","apple_news_api_id":"","apple_news_api_modified_at":"","apple_news_api_revision":"","apple_news_api_share_url":"","apple_news_coverimage":0,"apple_news_coverimage_caption":"","apple_news_is_hidden":false,"apple_news_is_paid":false,"apple_news_is_preview":false,"apple_news_is_sponsored":false,"apple_news_maturity_rating":"","apple_news_metadata":"\"\"","apple_news_pullquote":"","apple_news_pullquote_position":"","apple_news_slug":"","apple_news_sections":"\"\"","apple_news_suppress_video_url":false,"apple_news_use_image_component":false,"footnotes":""},"categories":[4],"tags":[],"class_list":["post-4214","post","type-post","status-publish","format-standard","hentry","category-programming-category"],"apple_news_notices":[],"_links":{"self":[{"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/posts\/4214","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/comments?post=4214"}],"version-history":[{"count":3,"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/posts\/4214\/revisions"}],"predecessor-version":[{"id":4217,"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/posts\/4214\/revisions\/4217"}],"wp:attachment":[{"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/media?parent=4214"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/categories?post=4214"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/tags?post=4214"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}