{"id":118,"date":"2013-05-14T20:25:01","date_gmt":"2013-05-14T12:25:01","guid":{"rendered":"http:\/\/coderbee.net\/?p=118"},"modified":"2013-05-14T17:38:11","modified_gmt":"2013-05-14T09:38:11","slug":"shell-%e8%84%9a%e6%9c%ac%e4%b9%8b%e5%87%bd%e6%95%b0","status":"publish","type":"post","link":"https:\/\/coderbee.net\/index.php\/linux\/20130514\/118","title":{"rendered":"shell \u811a\u672c\u4e4b\u51fd\u6570"},"content":{"rendered":"

\u7b80\u4ecb<\/h2>\n

\u51fd\u6570\u662f\u4e00\u4e9b\u547d\u4ee4\u7684\u96c6\u5408\uff0c\u7528\u4e00\u4e2a\u540d\u79f0\u505a\u4ee3\u8868\uff0c\u79f0\u4e3a\u51fd\u6570\u540d\u3002<\/p>\n

\u51fd\u6570\u7684\u6700\u5927\u4f5c\u7528\u5c31\u662f\u8ba9\u7a0b\u5e8f\u6a21\u5757\u5316\u3002<\/p>\n

Bash\u8c03\u7528\u51fd\u6570\u65f6\u4e0d\u4f1a\u5f00\u542f\u65b0\u7684shell\uff0c\u4f1a\u5728\u73b0\u6709shell\u73af\u5883\u4e2d\u6267\u884c\u8be5\u51fd\u6570\u3002<\/p>\n

\u7528\u6cd5<\/h2>\n

\u8bed\u6cd5<\/h3>\n

\u67093\u79cd\u5199\u6cd5\uff0c\u63a8\u8350\u7528\u7b2c2\u79cd\u3002<\/p>\n

\nfunction  funcName() {\n     cmds...\n}\n\nfuncName() {\n     cmds...\n}\n\nfunction  funcName {\n     cmds...\n}\n<\/code><\/pre>\n
\u8c03\u7528\u51fd\u6570<\/h3>\n
\u51fd\u6570\u8c03\u7528\u76f4\u63a5\u5199\u51fa\u51fd\u6570\u540d\u79f0\u5373\u53ef\uff0c\u5982\u679c\u6709\u53c2\u6570\uff0c\u5199\u5728\u51fd\u6570\u540d\u79f0\u540e\u9762\uff0c\u7a7a\u683c\u5206\u9694\u3002<\/p>\n
\nfuncName\nfuncName  paramVal1  paramVal2  paramVal3\n<\/code><\/pre>\n
\u53d6\u6d88\u51fd\u6570\u5b9a\u4e49<\/h3>\n
unset  -f  funcName<\/code><\/p>\n
\u5728\u51fd\u6570\u6267\u884c\u671f\u95f4\uff0cBash\u4f1a\u5efa\u7acb\u4e00\u4e2a\u7279\u522b\u7684\u53d8\u91cfFUNCNAME<\/code>\uff0c\u503c\u4e3a\u51fd\u6570\u540d\u79f0\u3002<\/p>\n
\u51fd\u6570\u7684\u7ed3\u675f\u72b6\u6001<\/h3>\n
\u6267\u884c\u51fd\u6570\u65f6\uff0c\u51fd\u6570\u4e2d\u6700\u540e\u4e00\u4e2a\u547d\u4ee4\u7684\u8fd4\u56de\u503c\u4ee3\u8868\u51fd\u6570\u7684\u7ed3\u675f\u72b6\u6001\uff0c\u5982\u679c\u9047\u5230return\u547d\u4ee4\uff0c\u5219\u7acb\u5373\u8fd4\u56de\uff0creturn\u547d\u4ee4\u53ef\u4ee5\u6307\u5b9a\u51fd\u6570\u7684\u8fd4\u56de\u503c\u3002<\/p>\n
\u51fd\u6570\u4e0e\u53d8\u91cf\u7684\u4f5c\u7528\u8303\u56f4<\/h2>\n
\u51fd\u6570\u4ec5\u5728\u5b9a\u4e49\u7684shell\u73af\u5883\u4e2d\u6709\u6548\uff0c\u5982\u679c\u8981\u4f20\u9012\u51fd\u6570\u7ed9\u5b50shell\u73af\u5883\u4f7f\u7528\uff0c\u9700\u8981\u4f7f\u7528\u547d\u4ee4export<\/code>\u53ca\u5176\u9009\u9879-f<\/code>\uff1aexport  -f  funcName<\/code>\u3002<\/p>\n
\u53d8\u91cf\u7684\u4f5c\u7528\u57df\u9ed8\u8ba4\u662f\u5168\u5c40\u7684\u3002\u53ef\u7528local<\/code>\u5c06\u53d8\u91cf\u8bbe\u7f6e\u4e3a\u51fd\u6570\u79c1\u6709\u7684\u3002<\/p>\n
\u4f4d\u7f6e\u53c2\u6570<\/h2>\n
\u51fd\u6570\u7684\u53c2\u6570\u501f\u7528\u4e86\u547d\u4ee4\u884c\u7684\u4f4d\u7f6e\u53c2\u6570\u7684\u6982\u5ff5\uff0c\u7528\u6765\u4f20\u9012\u53d8\u91cf\u503c\u3002<\/p>\n
\u5f53\u51fd\u6570\u501f\u7528\u547d\u4ee4\u884c\u7684\u4f4d\u7f6e\u53c2\u6570\u65f6\uff0c\u539f\u4f4d\u7f6e\u53c2\u6570\u503c\u4f1a\u88ab\u6682\u65f6\u4fdd\u5b58\u8d77\u6765\uff0c\u7b49\u5230\u51fd\u6570\u6267\u884c\u7ed3\u675f\uff0c\u4f1a\u518d\u590d\u539f\u5176\u503c\u3002<\/p>\n
\u79fb\u52a8\u4f4d\u7f6e\u53c2\u6570<\/h3>\n
shift  [n]<\/code>\uff1a\u5f80\u524d\u79fb\u52a8\u4f4d\u7f6e\u53c2\u6570\u7684\u503c\uff0c\u79fb\u52a8n\u4e2a\u5355\u4f4d\uff0cn\u9ed8\u8ba4\u662f1\u3002<\/p>\n
\u6307\u5b9a\u4f4d\u7f6e\u53c2\u6570\u7684\u503c<\/h3>\n
set  val1  val2 ...<\/code>\uff1aset\u547d\u4ee4\u8bbe\u5b9a\u4f4d\u7f6e\u53c2\u6570\u7684\u503c\uff0c\u6309\u987a\u5e8f\u5c06\u5bf9\u5e94\u7684\u503c\u4f20\u7ed9 $1,  $2,  $3,  ....<\/code>\u3002<\/p>\n
\u5982\u679c\u8981\u4e00\u6b21\u91cd\u7f6e\u6240\u6709\u7684\u4f4d\u7f6e\u53c2\u6570\uff0c\u4f7f\u5176\u503c\u4e3a\u7a7a\uff0c\u53ef\u6267\u884c\uff1aset  --<\/code>\u3002<\/p>\n
\u53d6\u547d\u4ee4\u884c\u9009\u9879\u548c\u53c2\u6570<\/h3>\n
\u4f7f\u7528\u5185\u7f6e\u547d\u4ee4getopts\uff1agetopts  \u9009\u9879\u884c  \u9009\u9879\u53d8\u91cf<\/code>\u3002\u5176\u4e2d\u7684\u9009\u9879\u884c\u7531\u5355\u4e00\u5b57\u7b26\u7ec4\u6210\u3002<\/p>\n
\u5982\u679c\u67d0\u4e2a\u9009\u9879\u9700\u8981\u63d0\u4f9b\u4e00\u4e2a\u53c2\u6570\uff0c\u5219\u5728\u9009\u9879\u5b57\u7b26\u540e\u65b9\u63a5\u4e0a\u5192\u53f7:<\/code>\uff0c\u5f53\u9009\u9879\u6ca1\u6709\u63d0\u4f9b\u989d\u5916\u7684\u53c2\u6570\u65f6\uff0cBash\u5c31\u4f1a\u63d0\u793a\u9519\u8bef\u4fe1\u606f\uff0c\u5982\u679c\u4e0d\u60f3\u51fa\u73b0\u9519\u8bef\u4fe1\u606f\uff0c\u53ef\u5728\u9009\u9879\u884c\u7684\u6700\u524d\u9762\u52a0\u4e0a\u5192\u53f7:<\/code>\u3002<\/p>\n
\u9009\u9879\u53d8\u91cf\u7684\u4f5c\u7528\uff1agetopts\u7531\u547d\u4ee4\u884c\u53d6\u5f97\u9009\u9879\uff0c\u628a\u5b83\u653e\u5165\u9009\u9879\u53d8\u91cf\u4e2d\uff0c\u5982\u679c\u8be5\u9009\u9879\u9700\u8981\u989d\u5916\u7684\u53c2\u6570\uff0c\u53c2\u6570\u503c\u4f1a\u653e\u5165OPTARG<\/code>\u53d8\u91cf\u4e2d\u3002<\/p>\n
<\/p>\n
\u4e3e\u4f8b<\/h2>\n
\u5fc5\u987b\u7528bash\u547d\u4ee4\u6765\u6267\u884c\uff1abash func.sh -u test -h<\/code>\uff0c\u7528\u53e5\u70b9\u6216sh\u90fd\u4e0d\u884c\u3002<\/p>\n
\nwhile getopts u:ah opt\ndo\n    case $opt in\n    u) echo \"provide option u and val :$OPTARG\" ;;\n    a) echo \"provide option a\" ;;\n    h) echo \"provide option h\" ;;\n    *) ;;\n    esac\ndone\n<\/code><\/pre>\n
\nfunction func1() {\n    echo \"i am func1,\" '$@=' $@\n}\n\nfunc2() {\n    while shift\n    do\n       [ -n \"$1\" ] && echo \"shift 1, \\$@ is :\" $@\n    done\n}\n\nfunction func3 {\n    set hello world\n    echo \"i am func3, \\$@ is :\" $@\n}\n\nfunc1 abc xyz 123\nfunc2 0 8 9 3 4 5\nfunc3\n<\/code><\/pre>\n\n
\u6b22\u8fce\u5173\u6ce8\u6211\u7684\u5fae\u4fe1\u516c\u4f17\u53f7: coderbee\u7b14\u8bb0<\/strong>\uff0c\u53ef\u4ee5\u66f4\u53ca\u65f6\u56de\u590d\u4f60\u7684\u8ba8\u8bba\u3002<\/p>\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
\u7b80\u4ecb \u51fd\u6570\u662f\u4e00\u4e9b\u547d\u4ee4\u7684\u96c6\u5408\uff0c\u7528\u4e00\u4e2a\u540d\u79f0\u505a\u4ee3\u8868\uff0c\u79f0\u4e3a\u51fd\u6570\u540d\u3002 \u51fd\u6570\u7684\u6700\u5927\u4f5c\u7528\u5c31\u662f\u8ba9 … \u7ee7\u7eed\u9605\u8bfb →<\/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":[36,42],"_links":{"self":[{"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/posts\/118"}],"collection":[{"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/comments?post=118"}],"version-history":[{"count":3,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/posts\/118\/revisions"}],"predecessor-version":[{"id":127,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/posts\/118\/revisions\/127"}],"wp:attachment":[{"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/media?parent=118"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/categories?post=118"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/tags?post=118"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}