1.\u7ba1\u9053\u662f\u4ec0\u4e48\uff1f<\/p>\n
\u7ba1\u9053\u662f\u4e00\u79cd\u53ea\u5b58\u5728\u4e8e\u5185\u5b58\u7684\u7279\u6b8a\u6587\u4ef6\uff0c\u6ca1\u6709\u78c1\u76d8\u6587\u4ef6\u4e0e\u4e4b\u5bf9\u5e94\u3002\u7ba1\u9053\u662f\u901a\u8fc7\u865a\u62df\u6587\u4ef6\u7cfb\u7edfpipefs\u800c\u5b9e\u73b0\u7684\uff0cpipefs\u4e0eproc\u3001sysfs\u7b49\u7279\u6b8a\u6587\u4ef6\u7cfb\u7edf\u4e00\u6837\uff0c\u53ea\u5b58\u5728\u4e8e\u5185\u5b58\u4e2d\u3002\u53e6\u5916\uff0c\u7ba1\u9053\u53ea\u80fd\u7528\u4e8e\u534a\u53cc\u5de5\u901a\u4fe1\u3002<\/p>\n
2.pipe()\u4e00\u4e2a\u7ba1\u9053\u610f\u5473\u7740\u4ec0\u4e48\uff1f<\/p>\n
pipe()\u5728pipefs\u6587\u4ef6\u7cfb\u7edf\u4e2d\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u7d22\u5f15\u8282\u70b9\uff0c\u540c\u65f6\u521b\u5efa\u4e24\u4e2afile\u5bf9\u8c61\uff0c\u4e00\u4e2afile\u5bf9\u8c61\u7528\u4e8e\u8bfb\u64cd\u4f5c\uff0c\u4e00\u4e2afile\u5bf9\u8c61\u7528\u4e8e\u5199\u64cd\u4f5c\u3002pipe()\u6700\u7ec8\u5c06\u4e24\u4e2afile\u5bf9\u8c61\u5bf9\u5e94\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u8fd4\u56de\u7ed9\u7528\u6237\u6001\u8fdb\u7a0b\uff0c\u4e5f\u5c31\u662f\u5411pipe()\u4e2d\u4f20\u9012\u7684fd\u6570\u7ec4\u3002<\/p>\n
3.\u5b50\u8fdb\u7a0bexecv()\u540e\u662f\u5426\u8fd8\u80fd\u7ee7\u7eed\u5171\u4eab\u7236\u8fdb\u7a0b\u7684\u7ba1\u9053\uff1f<\/p>\n
\u5b50\u8fdb\u7a0bexecv()\u540e\uff0c\u4e0d\u80fd\u518d\u7ee7\u7eed\u4f7f\u7528\u7236\u8fdb\u7a0b\u521b\u5efa\u7684\u7ba1\u9053\uff0c\u56e0\u4e3a\u5b50\u8fdb\u7a0b\u5f53\u524d\u7684\u4e0a\u4e0b\u6587\u5df2\u7ecf\u5b8c\u5168\u88ab\u53ef\u6267\u884c\u6587\u4ef6\u66ff\u6362\u3002\u5982\u679c\u8981\u7ee7\u7eed\u4f7f\u7528\u7ba1\u9053\uff0c\u5b50\u8fdb\u7a0b\u53ef\u4ee5\u5728execv()\u4e4b\u524d\u5c06\u4e24\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26\u91cd\u5b9a\u5411\u5230\u6807\u51c6\u8f93\u5165\u548c\u8f93\u51fa\u3002<\/p>\n
4.\u63cf\u8ff0\u7ba1\u9053\u7684\u6570\u636e\u7ed3\u6784\u4e0e\u7d22\u5f15\u8282\u70b9\u7684\u5173\u7cfb\uff1f<\/p>\n
\u7ba1\u9053\u867d\u7136\u662f\u4e00\u79cd\u7279\u6b8a\u6587\u4ef6\uff0c\u5b83\u4ecd\u7136\u901a\u8fc7VFS\u6846\u67b6\u4e2d\u7684inode\u6765\u63cf\u8ff0\u3002\u7531\u4e8eVFS\u8981\u5bf9\u6240\u6709\u4e0d\u540c\u7684\u6587\u4ef6\u8fdb\u884c\u62bd\u8c61\u63cf\u8ff0\uff0c\u56e0\u6b64inode\u53ea\u5bf9\u6240\u6709\u6587\u4ef6\u7684\u5171\u6027\u8fdb\u884c\u63cf\u8ff0\u3002inode\u4e2d\u7684i_pipe\u5b57\u6bb5\u6307\u5411pipe_inode_info\u7ed3\u6784\uff0c\u8be5\u7ed3\u6784\u7528\u4e8e\u63cf\u8ff0\u7ba1\u9053\u7684\u7279\u6027\u3002<\/p>\n
5.\u5199\u7ba1\u9053\u65f6\u5199\u5165\u7684\u5b57\u8282\u91cf\u4e0e\u7ba1\u9053\u5927\u5c0f\u7684\u5173\u7cfb\uff1f<\/p>\n
\u7ba1\u9053\u7f13\u51b2\u533a\u901a\u5e38\u4e3a\u4e00\u4e2a\u5355\u72ec\u7684\u9875\u6846\uff0c\u56e0\u6b64\u5927\u5c0f\u9ed8\u8ba4\u4e3a4096\u5b57\u8282\u3002\u5982\u679c\u4e24\u4e2a\u6216\u8005\u591a\u4e2a\u8fdb\u7a0b\u5e76\u53d1\u7684\u5199\u5165\u4e00\u4e2a\u7ba1\u9053\uff0c\u90a3\u4e48\u4efb\u4f55\u5c11\u4e8e4096\u5b57\u8282\u7684\u5199\u64cd\u4f5c\u90fd\u662f\u539f\u5b50\u7684\u3002\u4f46\u662f\uff0c\u5982\u679c\u5411\u7ba1\u9053\u5199\u5165\u5927\u4e8e\u7ba1\u9053\u7f13\u51b2\u533a\u5927\u5c0f\u7684\u6570\u636e\uff0c\u5219\u5199\u64cd\u4f5c\u662f\u53ef\u4ee5\u5206\u5272\u7684\uff0c\u4e5f\u5c31\u662f\u8bf4\u591a\u4e2a\u8fdb\u7a0b\u7684\u5199\u64cd\u4f5c\u53ef\u4ee5\u4ea4\u53c9\u8fdb\u884c\uff0c\u6b64\u65f6\u5e94\u8be5\u6ce8\u610f\u8fdb\u7a0b\u7684\u540c\u6b65\u3002<\/p>\n
6.\u6709\u540d\u7ba1\u9053\u662f\u4ec0\u4e48\uff1f<\/p>\n
\u6709\u540d\u7ba1\u9053\u662f\u4e00\u79cd\u8bbe\u5907\u6587\u4ef6\uff0c\u6709\u5bf9\u5e94\u7684\u78c1\u76d8\u7d22\u5f15\u8282\u70b9\u3002\u56e0\u4e3a\u5b58\u5728\u4e8e\u78c1\u76d8\u4e0a\uff0c\u56e0\u6b64\u53ef\u4ee5\u88ab\u4efb\u4f55\u8fdb\u7a0b\u6253\u5f00\u4f7f\u7528\u3002\u6709\u540d\u7ba1\u9053\u662f\u4e00\u79cd\u534a\u53cc\u5de5\u901a\u4fe1\u65b9\u5f0f\u3002<\/p>\n
7.ls | more \u7684\u5927\u81f4\u6267\u884c\u8fc7\u7a0b\uff1f<\/p>\n
\u5728\u7ec8\u7aef\u6267\u884cls | more\u65f6\uff0cshell\u8fdb\u7a0bfork()\u51fa\u4e00\u4e2a\u8fdb\u7a0bA\u7528\u6765\u6267\u884c\u4e0a\u8ff0\u547d\u4ee4\u3002A\u8fdb\u7a0b\u8c03\u7528pipe()\uff0c\u8fd4\u56de\u6587\u4ef6\u63cf\u8ff0\u7b26fd1\u548cfd2\uff0c\u5206\u522b\u7528\u4e8e\u8bfb\u548c\u5199\u7ba1\u9053\u3002\u8fdb\u7a0bA\u4e24\u6b21\u8c03\u7528fork()\uff0c\u4ea7\u751f\u4e24\u4e2a\u5b50\u8fdb\u7a0b\u3002\u8fdb\u7a0bA\u5173\u95edfd1\u548cfd2\u3002<\/p>\n
\u5bf9\u4e8e\u7b2c\u4e00\u4e2a\u5b50\u8fdb\u7a0b\uff0c\u5b83\u8c03\u7528dup2(fd2,1)\u5c06\u5199\u6587\u4ef6\u63cf\u8ff0\u7b26\u91cd\u5b9a\u5411\u5230\u6807\u51c6\u8f93\u51fa\u3002\u63a5\u4e0b\u6765\u8c03\u7528execv()\u7cfb\u7edf\u8c03\u7528\u6267\u884cls\u7a0b\u5e8f\uff0c\u8be5\u7a0b\u5e8f\u5c06\u81ea\u5df1\u7684\u8f93\u51fa\u5199\u5165\u7ba1\u9053\u3002<\/p>\n
\u5bf9\u4e8e\u7b2c\u4e8c\u4e2a\u5b50\u8fdb\u7a0b\uff0c\u5b83\u8c03\u7528dup2(fd1,0)\u5c06\u8bfb\u6587\u4ef6\u63cf\u8ff0\u7b26\u91cd\u5b9a\u5411\u5230\u6807\u51c6\u8f93\u5165\u3002\u63a5\u4e0b\u6765\u8c03\u7528execv()\u7cfb\u7edf\u8c03\u7528\u6267\u884cmore\u7a0b\u5e8f\uff0c\u8be5\u7a0b\u5e8f\u4ece\u7ba1\u9053\u4e2d\u8bfb\u53d6\u6570\u636e\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
1.\u7ba1\u9053\u662f\u4ec0\u4e48\uff1f \u7ba1\u9053\u662f\u4e00\u79cd\u53ea\u5b58\u5728\u4e8e\u5185\u5b58\u7684\u7279\u6b8a\u6587\u4ef6\uff0c\u6ca1\u6709\u78c1\u76d8\u6587\u4ef6\u4e0e\u4e4b\u5bf9\u5e94\u3002\u7ba1\u9053\u662f\u901a\u8fc7\u865a\u62df\u6587\u4ef6\u7cfb\u7edfpipefs\u800c […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[140],"tags":[332,331,141,138],"class_list":["post-3941","post","type-post","status-publish","format-standard","hentry","category-140","tag-fifo","tag-pipe","tag-141","tag-138"],"views":8679,"_links":{"self":[{"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/posts\/3941","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/comments?post=3941"}],"version-history":[{"count":0,"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/posts\/3941\/revisions"}],"wp:attachment":[{"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/media?parent=3941"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/categories?post=3941"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/tags?post=3941"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}