{"id":132,"date":"2019-02-10T18:07:15","date_gmt":"2019-02-10T10:07:15","guid":{"rendered":"http:\/\/b.yesiyu.top\/?p=132"},"modified":"2019-02-10T18:07:15","modified_gmt":"2019-02-10T10:07:15","slug":"shell-%e5%87%bd%e6%95%b0","status":"publish","type":"post","link":"https:\/\/b.yesiyu.top\/?p=132","title":{"rendered":"Shell \u51fd\u6570"},"content":{"rendered":"

Shell \u51fd\u6570<\/h1>\n

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

shell\u4e2d\u51fd\u6570\u7684\u5b9a\u4e49\u683c\u5f0f\u5982\u4e0b\uff1a<\/p>\n

[<\/span> function<\/span> ]<\/span> funname <\/span>[()]<\/span>\r\n\r\n{<\/span>\r\n\r\n    action<\/span>;<\/span>\r\n\r\n    [<\/span>return<\/span> int<\/span>;]<\/span>\r\n\r\n}<\/span><\/pre>\n
\u8bf4\u660e\uff1a<\/p>\n
    \n
  • 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
  • 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
    \u4e0b\u9762\u7684\u4f8b\u5b50\u5b9a\u4e49\u4e86\u4e00\u4e2a\u51fd\u6570\u5e76\u8fdb\u884c\u8c03\u7528\uff1a<\/p>\n
    #!\/bin\/bash<\/span>\r\n# author:\u83dc\u9e1f\u6559\u7a0b<\/span>\r\n# url:www.runoob.com<\/span>\r\n\r\ndemoFun<\/span>(){<\/span>\r\n    echo <\/span>\"\u8fd9\u662f\u6211\u7684\u7b2c\u4e00\u4e2a shell \u51fd\u6570!\"<\/span>\r\n}<\/span>\r\necho <\/span>\"-----\u51fd\u6570\u5f00\u59cb\u6267\u884c-----\"<\/span>\r\ndemoFun\r\necho <\/span>\"-----\u51fd\u6570\u6267\u884c\u5b8c\u6bd5-----\"<\/span><\/pre>\n
    \u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n
    -----\u51fd\u6570\u5f00\u59cb\u6267\u884c-----<\/span>\r\n\u8fd9\u662f\u6211\u7684\u7b2c\u4e00\u4e2a<\/span> shell <\/span>\u51fd\u6570!<\/span>\r\n-----\u51fd\u6570\u6267\u884c\u5b8c\u6bd5-----<\/span><\/pre>\n
    \u4e0b\u9762\u5b9a\u4e49\u4e00\u4e2a\u5e26\u6709return\u8bed\u53e5\u7684\u51fd\u6570\uff1a<\/p>\n
    #!\/bin\/bash<\/span>\r\n# author:\u83dc\u9e1f\u6559\u7a0b<\/span>\r\n# url:www.runoob.com<\/span>\r\n\r\nfunWithReturn<\/span>(){<\/span>\r\n    echo <\/span>\"\u8fd9\u4e2a\u51fd\u6570\u4f1a\u5bf9\u8f93\u5165\u7684\u4e24\u4e2a\u6570\u5b57\u8fdb\u884c\u76f8\u52a0\u8fd0\u7b97...\"<\/span>\r\n    echo <\/span>\"\u8f93\u5165\u7b2c\u4e00\u4e2a\u6570\u5b57: \"<\/span>\r\n    read aNum\r\n    echo <\/span>\"\u8f93\u5165\u7b2c\u4e8c\u4e2a\u6570\u5b57: \"<\/span>\r\n    read anotherNum\r\n    echo <\/span>\"\u4e24\u4e2a\u6570\u5b57\u5206\u522b\u4e3a $aNum \u548c $anotherNum !\"<\/span>\r\n    return<\/span> $<\/span>((<\/span>$aNum<\/span>+<\/span>$anotherNum<\/span>))<\/span>\r\n}<\/span>\r\nfunWithReturn\r\necho <\/span>\"\u8f93\u5165\u7684\u4e24\u4e2a\u6570\u5b57\u4e4b\u548c\u4e3a $? !\"<\/span><\/pre>\n
    \u8f93\u51fa\u7c7b\u4f3c\u4e0b\u9762\uff1a<\/p>\n
    \u8fd9\u4e2a\u51fd\u6570\u4f1a\u5bf9\u8f93\u5165\u7684\u4e24\u4e2a\u6570\u5b57\u8fdb\u884c\u76f8\u52a0\u8fd0\u7b97...<\/span>\r\n\u8f93\u5165\u7b2c\u4e00\u4e2a\u6570\u5b57:<\/span> \r\n1<\/span>\r\n\u8f93\u5165\u7b2c\u4e8c\u4e2a\u6570\u5b57:<\/span> \r\n2<\/span>\r\n\u4e24\u4e2a\u6570\u5b57\u5206\u522b\u4e3a<\/span> 1<\/span> \u548c<\/span> 2<\/span> !<\/span>\r\n\u8f93\u5165\u7684\u4e24\u4e2a\u6570\u5b57\u4e4b\u548c\u4e3a<\/span> 3<\/span> !<\/span><\/pre>\n
    \u51fd\u6570\u8fd4\u56de\u503c\u5728\u8c03\u7528\u8be5\u51fd\u6570\u540e\u901a\u8fc7 $? \u6765\u83b7\u5f97\u3002<\/p>\n
    \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
    \n
    \u51fd\u6570\u53c2\u6570<\/h2>\n
    \u5728Shell\u4e2d\uff0c\u8c03\u7528\u51fd\u6570\u65f6\u53ef\u4ee5\u5411\u5176\u4f20\u9012\u53c2\u6570\u3002\u5728\u51fd\u6570\u4f53\u5185\u90e8\uff0c\u901a\u8fc7 $n \u7684\u5f62\u5f0f\u6765\u83b7\u53d6\u53c2\u6570\u7684\u503c\uff0c\u4f8b\u5982\uff0c$1\u8868\u793a\u7b2c\u4e00\u4e2a\u53c2\u6570\uff0c$2\u8868\u793a\u7b2c\u4e8c\u4e2a\u53c2\u6570…<\/p>\n
    \u5e26\u53c2\u6570\u7684\u51fd\u6570\u793a\u4f8b\uff1a<\/p>\n
    #!\/bin\/bash<\/span>\r\n# author:\u83dc\u9e1f\u6559\u7a0b<\/span>\r\n# url:www.runoob.com<\/span>\r\n\r\nfunWithParam<\/span>(){<\/span>\r\n    echo <\/span>\"\u7b2c\u4e00\u4e2a\u53c2\u6570\u4e3a $1 !\"<\/span>\r\n    echo <\/span>\"\u7b2c\u4e8c\u4e2a\u53c2\u6570\u4e3a $2 !\"<\/span>\r\n    echo <\/span>\"\u7b2c\u5341\u4e2a\u53c2\u6570\u4e3a $10 !\"<\/span>\r\n    echo <\/span>\"\u7b2c\u5341\u4e2a\u53c2\u6570\u4e3a ${10} !\"<\/span>\r\n    echo <\/span>\"\u7b2c\u5341\u4e00\u4e2a\u53c2\u6570\u4e3a ${11} !\"<\/span>\r\n    echo <\/span>\"\u53c2\u6570\u603b\u6570\u6709 $# \u4e2a!\"<\/span>\r\n    echo <\/span>\"\u4f5c\u4e3a\u4e00\u4e2a\u5b57\u7b26\u4e32\u8f93\u51fa\u6240\u6709\u53c2\u6570 $* !\"<\/span>\r\n}<\/span>\r\nfunWithParam <\/span>1<\/span> 2<\/span> 3<\/span> 4<\/span> 5<\/span> 6<\/span> 7<\/span> 8<\/span> 9<\/span> 34<\/span> 73<\/span><\/pre>\n
    \u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n
    \u7b2c\u4e00\u4e2a\u53c2\u6570\u4e3a<\/span> 1<\/span> !<\/span>\r\n\u7b2c\u4e8c\u4e2a\u53c2\u6570\u4e3a<\/span> 2<\/span> !<\/span>\r\n\u7b2c\u5341\u4e2a\u53c2\u6570\u4e3a<\/span> 10<\/span> !<\/span>\r\n\u7b2c\u5341\u4e2a\u53c2\u6570\u4e3a<\/span> 34<\/span> !<\/span>\r\n\u7b2c\u5341\u4e00\u4e2a\u53c2\u6570\u4e3a<\/span> 73<\/span> !<\/span>\r\n\u53c2\u6570\u603b\u6570\u6709<\/span> 11<\/span> \u4e2a!<\/span>\r\n\u4f5c\u4e3a\u4e00\u4e2a\u5b57\u7b26\u4e32\u8f93\u51fa\u6240\u6709\u53c2\u6570<\/span> 1<\/span> 2<\/span> 3<\/span> 4<\/span> 5<\/span> 6<\/span> 7<\/span> 8<\/span> 9<\/span> 34<\/span> 73<\/span> !<\/span><\/pre>\n
    \u6ce8\u610f\uff0c$10 \u4e0d\u80fd\u83b7\u53d6\u7b2c\u5341\u4e2a\u53c2\u6570\uff0c\u83b7\u53d6\u7b2c\u5341\u4e2a\u53c2\u6570\u9700\u8981${10}\u3002\u5f53n>=10\u65f6\uff0c\u9700\u8981\u4f7f\u7528${n}\u6765\u83b7\u53d6\u53c2\u6570\u3002<\/p>\n
    \u53e6\u5916\uff0c\u8fd8\u6709\u51e0\u4e2a\u7279\u6b8a\u5b57\u7b26\u7528\u6765\u5904\u7406\u53c2\u6570\uff1a<\/p>\n\n\n\n\n\n\n\n\n\n\n
    \u53c2\u6570\u5904\u7406<\/th>\n\u8bf4\u660e<\/th>\n<\/tr>\n
    $#<\/td>\n\u4f20\u9012\u5230\u811a\u672c\u7684\u53c2\u6570\u4e2a\u6570<\/td>\n<\/tr>\n
    $*<\/td>\n\u4ee5\u4e00\u4e2a\u5355\u5b57\u7b26\u4e32\u663e\u793a\u6240\u6709\u5411\u811a\u672c\u4f20\u9012\u7684\u53c2\u6570<\/td>\n<\/tr>\n
    $$<\/td>\n\u811a\u672c\u8fd0\u884c\u7684\u5f53\u524d\u8fdb\u7a0bID\u53f7<\/td>\n<\/tr>\n
    $!<\/td>\n\u540e\u53f0\u8fd0\u884c\u7684\u6700\u540e\u4e00\u4e2a\u8fdb\u7a0b\u7684ID\u53f7<\/td>\n<\/tr>\n
    $@<\/td>\n\u4e0e$*\u76f8\u540c\uff0c\u4f46\u662f\u4f7f\u7528\u65f6\u52a0\u5f15\u53f7\uff0c\u5e76\u5728\u5f15\u53f7\u4e2d\u8fd4\u56de\u6bcf\u4e2a\u53c2\u6570\u3002<\/td>\n<\/tr>\n
    $-<\/td>\n\u663e\u793aShell\u4f7f\u7528\u7684\u5f53\u524d\u9009\u9879\uff0c\u4e0eset\u547d\u4ee4\u529f\u80fd\u76f8\u540c\u3002<\/td>\n<\/tr>\n
    $?<\/td>\n\u663e\u793a\u6700\u540e\u547d\u4ee4\u7684\u9000\u51fa\u72b6\u6001\u30020\u8868\u793a\u6ca1\u6709\u9519\u8bef\uff0c\u5176\u4ed6\u4efb\u4f55\u503c\u8868\u660e\u6709\u9519\u8bef\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"
    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 … <\/p>\n
    \u7ee7\u7eed\u9605\u8bfb\u201cShell \u51fd\u6570\u201d<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-132","post","type-post","status-publish","format-standard","hentry","category-liunx-"],"_links":{"self":[{"href":"https:\/\/b.yesiyu.top\/index.php?rest_route=\/wp\/v2\/posts\/132","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/b.yesiyu.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/b.yesiyu.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/b.yesiyu.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/b.yesiyu.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=132"}],"version-history":[{"count":1,"href":"https:\/\/b.yesiyu.top\/index.php?rest_route=\/wp\/v2\/posts\/132\/revisions"}],"predecessor-version":[{"id":133,"href":"https:\/\/b.yesiyu.top\/index.php?rest_route=\/wp\/v2\/posts\/132\/revisions\/133"}],"wp:attachment":[{"href":"https:\/\/b.yesiyu.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=132"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/b.yesiyu.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=132"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/b.yesiyu.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=132"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}