{"id":1492,"date":"2016-11-28T11:54:42","date_gmt":"2016-11-28T03:54:42","guid":{"rendered":"http:\/\/cn.hostease.com\/xueyuan\/?p=1492"},"modified":"2016-11-28T11:55:17","modified_gmt":"2016-11-28T03:55:17","slug":"shell-%e5%87%bd%e6%95%b0","status":"publish","type":"post","link":"https:\/\/cn.hostease.com\/xueyuan\/jishu\/shell-%e5%87%bd%e6%95%b0\/","title":{"rendered":"Shell \u51fd\u6570"},"content":{"rendered":"<h1>Shell \u51fd\u6570<\/h1>\n<p>linux shell \u53ef\u4ee5\u7528\u6237\u5b9a\u4e49\u51fd\u6570\uff0c\u7136\u540e\u5728shell\u811a\u672c\u4e2d\u53ef\u4ee5\u968f\u4fbf\u8c03\u7528\u3002<\/p>\n<p>shell\u4e2d\u51fd\u6570\u7684\u5b9a\u4e49\u683c\u5f0f\u5982\u4e0b\uff1a<\/p>\n<pre class=\"prettyprint prettyprinted\"><span class=\"pun\">[<\/span> <span class=\"kwd\">function<\/span> <span class=\"pun\">]<\/span><span class=\"pln\"> funname <\/span><span class=\"pun\">[()]<\/span>\r\n\r\n<span class=\"pun\">{<\/span><span class=\"pln\">\r\n\r\n    action<\/span><span class=\"pun\">;<\/span>\r\n\r\n    <span class=\"pun\">[<\/span><span class=\"kwd\">return<\/span> <span class=\"kwd\">int<\/span><span class=\"pun\">;]<\/span>\r\n\r\n<span class=\"pun\">}<\/span><\/pre>\n<p>\u8bf4\u660e\uff1a<\/p>\n<ul>\n<li>1\u3001\u53ef\u4ee5\u5e26function fun() \u5b9a\u4e49\uff0c\u4e5f\u53ef\u4ee5\u76f4\u63a5fun() \u5b9a\u4e49,\u4e0d\u5e26\u4efb\u4f55\u53c2\u6570\u3002<\/li>\n<li>2\u3001\u53c2\u6570\u8fd4\u56de\uff0c\u53ef\u4ee5\u663e\u793a\u52a0\uff1areturn \u8fd4\u56de\uff0c\u5982\u679c\u4e0d\u52a0\uff0c\u5c06\u4ee5\u6700\u540e\u4e00\u6761\u547d\u4ee4\u8fd0\u884c\u7ed3\u679c\uff0c\u4f5c\u4e3a\u8fd4\u56de\u503c\u3002 return\u540e\u8ddf\u6570\u503cn(0-255<\/li>\n<\/ul>\n<p>\u4e0b\u9762\u7684\u4f8b\u5b50\u5b9a\u4e49\u4e86\u4e00\u4e2a\u51fd\u6570\u5e76\u8fdb\u884c\u8c03\u7528\uff1a<\/p>\n<pre class=\"prettyprint prettyprinted\"><span class=\"com\">#!\/bin\/bash<\/span>\r\n<span class=\"com\"># author:\u83dc\u9e1f\u6559\u7a0b<\/span>\r\n<span class=\"com\"># url:www.runoob.com<\/span><span class=\"pln\">\r\n\r\ndemoFun<\/span><span class=\"pun\">(){<\/span><span class=\"pln\">\r\n    echo <\/span><span class=\"str\">\"\u8fd9\u662f\u6211\u7684\u7b2c\u4e00\u4e2a shell \u51fd\u6570!\"<\/span>\r\n<span class=\"pun\">}<\/span><span class=\"pln\">\r\necho <\/span><span class=\"str\">\"-----\u51fd\u6570\u5f00\u59cb\u6267\u884c-----\"<\/span><span class=\"pln\">\r\ndemoFun\r\necho <\/span><span class=\"str\">\"-----\u51fd\u6570\u6267\u884c\u5b8c\u6bd5-----\"<\/span><\/pre>\n<p>\u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n<pre class=\"prettyprint prettyprinted\"><span class=\"pun\">-----\u51fd\u6570\u5f00\u59cb\u6267\u884c-----<\/span>\r\n<span class=\"pun\">\u8fd9\u662f\u6211\u7684\u7b2c\u4e00\u4e2a<\/span><span class=\"pln\"> shell <\/span><span class=\"pun\">\u51fd\u6570!<\/span>\r\n<span class=\"pun\">-----\u51fd\u6570\u6267\u884c\u5b8c\u6bd5-----<\/span><\/pre>\n<p>\u4e0b\u9762\u5b9a\u4e49\u4e00\u4e2a\u5e26\u6709return\u8bed\u53e5\u7684\u51fd\u6570\uff1a<\/p>\n<pre class=\"prettyprint prettyprinted\"><span class=\"com\">#!\/bin\/bash<\/span>\r\n<span class=\"com\"># author:\u83dc\u9e1f\u6559\u7a0b<\/span>\r\n<span class=\"com\"># url:www.runoob.com<\/span><span class=\"pln\">\r\n\r\nfunWithReturn<\/span><span class=\"pun\">(){<\/span><span class=\"pln\">\r\n    echo <\/span><span class=\"str\">\"\u8fd9\u4e2a\u51fd\u6570\u4f1a\u5bf9\u8f93\u5165\u7684\u4e24\u4e2a\u6570\u5b57\u8fdb\u884c\u76f8\u52a0\u8fd0\u7b97...\"<\/span><span class=\"pln\">\r\n    echo <\/span><span class=\"str\">\"\u8f93\u5165\u7b2c\u4e00\u4e2a\u6570\u5b57: \"<\/span><span class=\"pln\">\r\n    read aNum\r\n    echo <\/span><span class=\"str\">\"\u8f93\u5165\u7b2c\u4e8c\u4e2a\u6570\u5b57: \"<\/span><span class=\"pln\">\r\n    read anotherNum\r\n    echo <\/span><span class=\"str\">\"\u4e24\u4e2a\u6570\u5b57\u5206\u522b\u4e3a $aNum \u548c $anotherNum !\"<\/span>\r\n    <span class=\"kwd\">return<\/span><span class=\"pln\"> $<\/span><span class=\"pun\">((<\/span><span class=\"pln\">$aNum<\/span><span class=\"pun\">+<\/span><span class=\"pln\">$anotherNum<\/span><span class=\"pun\">))<\/span>\r\n<span class=\"pun\">}<\/span><span class=\"pln\">\r\nfunWithReturn\r\necho <\/span><span class=\"str\">\"\u8f93\u5165\u7684\u4e24\u4e2a\u6570\u5b57\u4e4b\u548c\u4e3a $? !\"<\/span><\/pre>\n<p>\u8f93\u51fa\u7c7b\u4f3c\u4e0b\u9762\uff1a<\/p>\n<pre class=\"prettyprint prettyprinted\"><span class=\"pun\">\u8fd9\u4e2a\u51fd\u6570\u4f1a\u5bf9\u8f93\u5165\u7684\u4e24\u4e2a\u6570\u5b57\u8fdb\u884c\u76f8\u52a0\u8fd0\u7b97...<\/span>\r\n<span class=\"pun\">\u8f93\u5165\u7b2c\u4e00\u4e2a\u6570\u5b57:<\/span> \r\n<span class=\"lit\">1<\/span>\r\n<span class=\"pun\">\u8f93\u5165\u7b2c\u4e8c\u4e2a\u6570\u5b57:<\/span> \r\n<span class=\"lit\">2<\/span>\r\n<span class=\"pun\">\u4e24\u4e2a\u6570\u5b57\u5206\u522b\u4e3a<\/span> <span class=\"lit\">1<\/span> <span class=\"pun\">\u548c<\/span> <span class=\"lit\">2<\/span> <span class=\"pun\">!<\/span>\r\n<span class=\"pun\">\u8f93\u5165\u7684\u4e24\u4e2a\u6570\u5b57\u4e4b\u548c\u4e3a<\/span> <span class=\"lit\">3<\/span> <span class=\"pun\">!<\/span><\/pre>\n<p>\u51fd\u6570\u8fd4\u56de\u503c\u5728\u8c03\u7528\u8be5\u51fd\u6570\u540e\u901a\u8fc7 $? \u6765\u83b7\u5f97\u3002<\/p>\n<p>\u6ce8\u610f\uff1a\u6240\u6709\u51fd\u6570\u5728\u4f7f\u7528\u524d\u5fc5\u987b\u5b9a\u4e49\u3002\u8fd9\u610f\u5473\u7740\u5fc5\u987b\u5c06\u51fd\u6570\u653e\u5728\u811a\u672c\u5f00\u59cb\u90e8\u5206\uff0c\u76f4\u81f3shell\u89e3\u91ca\u5668\u9996\u6b21\u53d1\u73b0\u5b83\u65f6\uff0c\u624d\u53ef\u4ee5\u4f7f\u7528\u3002\u8c03\u7528\u51fd\u6570\u4ec5\u4f7f\u7528\u5176\u51fd\u6570\u540d\u5373\u53ef\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>\u539f\u6587\u94fe\u63a5\uff1ahttps:\/\/www.runoob.com\/linux\/linux-shell-func.html<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Shell \u51fd\u6570 linux shell \u53ef\u4ee5\u7528\u6237\u5b9a\u4e49\u51fd\u6570\uff0c\u7136\u540e\u5728shell\u811a\u672c\u4e2d\u53ef\u4ee5\u968f\u4fbf\u8c03\u7528\u3002 shell\u4e2d &#8230; <a title=\"Shell \u51fd\u6570\" class=\"read-more\" href=\"https:\/\/cn.hostease.com\/xueyuan\/jishu\/shell-%e5%87%bd%e6%95%b0\/\" aria-label=\"\u9605\u8bfb Shell \u51fd\u6570\">\u9605\u8bfb\u66f4\u591a<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[49,5],"tags":[475],"class_list":["post-1492","post","type-post","status-publish","format-standard","hentry","category-linux","category-jishu","tag-linuxshell"],"aioseo_notices":[],"jetpack_featured_media_url":"","jetpack-related-posts":[],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/posts\/1492","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/comments?post=1492"}],"version-history":[{"count":2,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/posts\/1492\/revisions"}],"predecessor-version":[{"id":1494,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/posts\/1492\/revisions\/1494"}],"wp:attachment":[{"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/media?parent=1492"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/categories?post=1492"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/tags?post=1492"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}