{"id":1923,"date":"2018-06-11T08:21:03","date_gmt":"2018-06-10T23:21:03","guid":{"rendered":"http:\/\/matoken.org\/blog\/?p=1923"},"modified":"2018-06-11T08:21:03","modified_gmt":"2018-06-10T23:21:03","slug":"do-not-execute-when-there-is-no-execution-result-with-xargs","status":"publish","type":"post","link":"https:\/\/matoken.org\/blog\/2018\/06\/11\/do-not-execute-when-there-is-no-execution-result-with-xargs\/","title":{"rendered":"xargs\u3067\u5b9f\u884c\u7d50\u679c\u304c\u7121\u3044\u3068\u304d\u306f\u5b9f\u884c\u3057\u306a\u3044"},"content":{"rendered":"<p>\u3088\u304ffind\u30b3\u30de\u30f3\u30c9\u3068xargs\u30b3\u30de\u30f3\u30c9\u3092\u7d44\u307f\u5408\u308f\u305b\u307e\u3059\u304c\uff0cfind\u306e\u7d50\u679c\u304c0\u306e\u3068\u304d\u3067\u3082xargs\u306f\u52d5\u3044\u3066\u30d5\u30a1\u30a4\u30eb\u304c\u306a\u3044\u306e\u3067\u30a8\u30e9\u30fc\u304c\u51fa\u529b\u3055\u308c\u3066\u3057\u307e\u3044\u307e\u3059\uff0e<\/p>\n<pre><code class='language-shell' lang='shell'>$ find . -name &#39;hoge&#39; -print | wc -l\r\n\r\n0\r\n\r\n$ find . -name &#39;hoge&#39; -print | xargs flickcurl upload\r\n\r\nflickcurl: Minimum of 1 arguments for command `upload&#39;\r\n\r\n  USAGE: flickcurl upload FILE [PARAMS...]\r\n\r\nTry `flickcurl --help&#39; for more information.\r\n<\/code><\/pre>\n<p>xargs\u3092\u4f7f\u308f\u306a\u3044\u3067find\u306e<code><span style='font-family:Merriweather, \"PT Serif\", Georgia, \"Times New Roman\", STSong, serif'>-<\/span>exec<\/code>\u3067\u56de\u907f\u3067\u304d\u308b\u306e\u3067\u3059\u304c\uff0cxargs\u3092\u4f7f\u3044\u305f\u3044\u3067\u3059\uff0e<\/p>\n<pre><code class='language-shell' lang='shell'>$ find . -name &#39;hoge&#39; -exec flickcurl upload {} \\;\r\n<\/code><\/pre>\n<p>man\u3092\u307f\u308b\u3068\u305d\u306e\u3082\u306e\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u304c\u3042\u308a\u307e\u3057\u305f\uff0e<\/p>\n<blockquote>\n<p>-r, &#8211;no-run-if-empty<br \/>\n       If the standard input does not contain any nonblanks, do not run the command.  Normally, the command is run once even if there is no input.  This option is  a<br \/>\n       GNU extension.<\/p>\n<\/blockquote>\n<p>\u65e9\u901f\u8a66\u3057\u3066\u307f\u308b\u3068\u3046\u307e\u304f\u884c\u304d\u307e\u3057\u305f :)<\/p>\n<pre><code class='language-shell' lang='shell'>$ find . -name &#39;hoge&#39; -print | xargs -r flickcurl upload\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u3088\u304ffind\u30b3\u30de\u30f3\u30c9\u3068xargs\u30b3\u30de\u30f3\u30c9\u3092\u7d44\u307f\u5408\u308f\u305b\u307e\u3059\u304c\uff0cfind\u306e\u7d50\u679c\u304c0\u306e\u3068\u304d\u3067\u3082xargs\u306f\u52d5\u3044\u3066\u30d5\u30a1\u30a4\u30eb\u304c\u306a\u3044\u306e\u3067\u30a8\u30e9\u30fc\u304c\u51fa\u529b\u3055\u308c\u3066\u3057\u307e\u3044\u307e\u3059\uff0e $ find . -name &#39;hoge&#39; -p [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"webmentions_disabled_pings":false,"webmentions_disabled":false,"activitypub_content_warning":"","activitypub_content_visibility":"","activitypub_max_image_attachments":4,"activitypub_interaction_policy_quote":"anyone","activitypub_status":"","footnotes":""},"categories":[1],"tags":[118,120],"class_list":["post-1923","post","type-post","status-publish","format-standard","hentry","category-1","tag-find","tag-xargs"],"_links":{"self":[{"href":"https:\/\/matoken.org\/blog\/wp-json\/wp\/v2\/posts\/1923","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/matoken.org\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/matoken.org\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/matoken.org\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/matoken.org\/blog\/wp-json\/wp\/v2\/comments?post=1923"}],"version-history":[{"count":0,"href":"https:\/\/matoken.org\/blog\/wp-json\/wp\/v2\/posts\/1923\/revisions"}],"wp:attachment":[{"href":"https:\/\/matoken.org\/blog\/wp-json\/wp\/v2\/media?parent=1923"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/matoken.org\/blog\/wp-json\/wp\/v2\/categories?post=1923"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/matoken.org\/blog\/wp-json\/wp\/v2\/tags?post=1923"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}