{"id":859,"date":"2021-03-15T15:23:32","date_gmt":"2021-03-15T07:23:32","guid":{"rendered":"\/?p=859"},"modified":"2021-03-15T15:23:32","modified_gmt":"2021-03-15T07:23:32","slug":"1-12shell%e5%87%bd%e6%95%b0%e5%92%8c%e5%8f%82%e6%95%b0","status":"publish","type":"post","link":"http:\/\/xinblog.ltd\/?p=859","title":{"rendered":"1.12shell\u51fd\u6570\u548c\u53c2\u6570"},"content":{"rendered":"<p>Bash\u652f\u6301\u51fd\u6570,\u5982\u4f55\u53bb\u5b9a\u4e49\u548c\u4f7f\u7528\u7684<\/p>\n<p>function fname(){<\/p>\n<p>statements;<\/p>\n<p>}<\/p>\n<p>\u6216\u8005<\/p>\n<p>fname()<\/p>\n<p>{<\/p>\n<p>statememts<\/p>\n<p>}<\/p>\n<p>\u5728\u4f7f\u7528\u65b9\u9762,\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528\u51fd\u6570\u540d\u6765\u8c03\u7528\u4e00\u4e2a\u51fd\u6570<\/p>\n<p>$frame<\/p>\n<p>\u4e5f\u53ef\u4ee5\u76f4\u63a5\u51fd\u6570\u540d<\/p>\n<p>$frame arg1 arg2 \u4f20\u9012\u53c2\u6570<\/p>\n<p>\u63a5\u4e0b\u6765\u6211\u4eec\u770b\u4e00\u4e2a\u51fd\u6570 frame()<\/p>\n<p>frame(){<\/p>\n<p>ehco $1 ,$2; \u8bbf\u95ee\u53c2\u6570 1 2<\/p>\n<p>echo &#8220;$@&#8221;; \u4ee5\u5217\u8868\u7684\u65b9\u5f0f\u4e00\u6b21\u6027\u6253\u5370\u6240\u6709\u7684\u53c2\u6570<\/p>\n<p>echo &#8220;$*&#8221;; \u7c7b\u4f3c@,\u53c2\u6570\u4f5c\u4e3a\u5355\u4e2a\u5b9e\u4f53<\/p>\n<p>return 0; \u8fd4\u56de\u503c<\/p>\n<p>}<\/p>\n<p>\u4ece\u53c2\u6570\u53ef\u4ee5\u76f4\u63a5\u4f20\u9012\u7ed9\u811a\u672c\u5e76\u901a\u8fc7<\/p>\n<p>script:$0(\u811a\u672c\u540d)\u8bbf\u95ee<\/p>\n<p>$@ \u88ab\u6269\u5c55\u4e3a $1 $2 $3<\/p>\n<p>$* \u88ab\u6269\u5c55\u4e3a$1c$2c$3<\/p>\n<p>\u6240\u4ee5$@\u5e38\u88ab\u4f7f\u7528<\/p>\n<p>\u8fd8\u6709\u5c31\u662f<\/p>\n<p>Shell\u4e2d\u7684\u51fd\u6570,\u4e00\u822c\u652f\u6301\u9012\u5f52<\/p>\n<p>\u6bd4\u5982 F(){<\/p>\n<p>echo $1;<\/p>\n<p>F hello;<\/p>\n<p>sleep 1;<\/p>\n<p>}<\/p>\n<p>\u5bfc\u81f4\u4e0d\u65ad\u7684\u9012\u5f52\u8c03\u7528\u81ea\u5df1,\u4e0d\u65ad\u7684\u751f\u6210\u8fdb\u7a0b,\u6700\u7ec8\u5bfc\u81f4\u670d\u52a1\u7206\u6ee1<\/p>\n<p>\u8fd9\u4e2a\u53ef\u4ee5\u901a\u8fc7\u4fee\u6539\u914d\u7f6e\u6587\u4ef6 \/etc\/security\/limits.conf\u6765\u9650\u5236\u751f\u6210\u6700\u5927\u8fdb\u7a0b\u6570\u4ece\u800c\u907f\u514d\u6324\u7206\u4e86<\/p>\n<p>\u5bfc\u51fa\u51fd\u6570<\/p>\n<p>\u5c06\u51fd\u6570\u50cf\u662f\u73af\u5883\u53d8\u91cf\u4e00\u6837\u7684\u7528export \u5bfc\u51fa,\u8fd9\u6837,\u51fd\u6570\u7684\u4f5c\u7528\u57df\u5c31\u53ef\u4ee5\u6269\u5c55\u5230\u4e86\u5b50\u8fdb\u7a0b\u4e4b\u4e2d\u4e86<\/p>\n<p>export -f fname<\/p>\n<p>\u8bfb\u53d6\u8fd4\u56de\u503c<\/p>\n<p>\u6211\u4eec\u83b7\u53d6\u5230\u51fd\u6570\u7684\u65b9\u5f0f\u53ef\u4ee5\u5982\u4e0b<\/p>\n<p>function name;<\/p>\n<p>echo $?;<\/p>\n<p>\u7ed9\u51fa\u547d\u4ee4cmd\u7684\u8fd4\u56de\u503c<\/p>\n<p>\u6211\u4eec\u53ef\u4ee5\u5229\u7528\u8fd4\u56de\u503c\u7684\u6821\u9a8c,\u5c06\u5176\u68c0\u6d4b\u662f\u5426\u6b63\u5e38\u6267\u884c\u6d41\u7a0b\u7ed3\u675f<\/p>\n<table>\n<tbody>\n<tr>\n<td>#!\/bin\/bash<\/p>\n<p>function test(){<\/p>\n<p>return 0;<\/p>\n<p>}<\/p>\n<p>test<\/p>\n<p>if [\u00a0 $? -eq 0 ];<\/p>\n<p>then<\/p>\n<p>echo &#8220;test is already successfully&#8221;<\/p>\n<p>else<\/p>\n<p>echo &#8220;test isnt successfully&#8221;<\/p>\n<p>fi<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u547d\u4ee4\u4f20\u9012\u53c2\u6570<\/p>\n<p>\u547d\u4ee4\u7684\u53c2\u6570\u53ef\u4ee5\u4ee5\u4e0d\u540c\u7684\u683c\u5f0f\u8fdb\u884c\u4f20\u9012,\u5047\u8bbe-p -v\u662f\u53ef\u9009\u7684\u9009\u9879 -k NO\u662f\u53e6\u4e00\u4e2a\u53ef\u4ee5\u63a5\u53d7\u6570\u5b57\u7684\u9009\u9879,\u540c\u65f6\u8fd9\u4e2a\u547d\u4ee4\u8fd8\u63a5\u53d7\u4e00\u4e2a\u6587\u4ef6\u540d\u4f5c\u4e3a\u53c2\u6570,\u90a3\u4e48\u5176\u6267\u884c\u65b9\u5f0f\u5f88\u591a,\u5305\u542b\u4ee5\u4e0b\u51e0\u79cd<\/p>\n<p>command -p -v -k 1 file<\/p>\n<p>command -pv -k 1 file<\/p>\n<p>command -vpk 1 file<\/p>\n<p>command file -pvk 1<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Bash\u652f\u6301\u51fd\u6570,\u5982\u4f55\u53bb\u5b9a\u4e49\u548c [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"_links":{"self":[{"href":"http:\/\/xinblog.ltd\/index.php?rest_route=\/wp\/v2\/posts\/859"}],"collection":[{"href":"http:\/\/xinblog.ltd\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/xinblog.ltd\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/xinblog.ltd\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/xinblog.ltd\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=859"}],"version-history":[{"count":0,"href":"http:\/\/xinblog.ltd\/index.php?rest_route=\/wp\/v2\/posts\/859\/revisions"}],"wp:attachment":[{"href":"http:\/\/xinblog.ltd\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=859"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/xinblog.ltd\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=859"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/xinblog.ltd\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=859"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}