{"id":117271,"date":"2026-10-23T00:17:04","date_gmt":"2026-10-22T16:17:04","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/117271.html"},"modified":"2026-10-23T00:17:04","modified_gmt":"2026-10-22T16:17:04","slug":"%e3%80%90linux-%e7%b3%bb%e7%bb%9f%e7%af%87%e4%b8%89%e5%8d%81%e4%b8%80%e3%80%91%e9%80%9a%e4%bf%a1%e4%b8%80%ef%bc%9a%e4%bb%8e%e7%ae%a1%e9%81%93%e5%8e%9f%e7%90%86%e5%88%b0%e8%bf%9b%e7%a8%8b%e6%b1%a0","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/117271.html","title":{"rendered":"\u3010Linux \u7cfb\u7edf\u7bc7(\u4e09\u5341\u4e00)\u3011\u901a\u4fe1(\u4e00)\uff1a\u4ece\u7ba1\u9053\u539f\u7406\u5230\u8fdb\u7a0b\u6c60\u5b9e\u6218"},"content":{"rendered":"

\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

\u5927\u5bb6\u597d，\u6b22\u8fce\u6765\u5230 huangjin007_ \u7684\u535a\u5ba2
\n \u2b50
\n \u4e2a\u4eba\u4e3b\u9875：huangjin007_
\n 🔥
\n \u6587\u7ae0\u6536\u5f55\u4e13\u680f：Linux \u5185\u529f\u4fee\u70bc\u624b\u518c(\u7cfb\u7edf\u7bc7) <\/p>\n

\u603b\u4f1a\u6709\u4e00\u4e9b\u575a\u6301\u80fd\u4ece\u51b0\u5c01\u7684\u571f\u5730\u91cc\u57f9\u80b2\u51fa\u5341\u4e07\u6735\u6012\u653e\u7684\u8537\u8587<\/b><\/font> <\/p>\n

\n

Linux \u7cfb\u7edf\u7bc7(\u4e09\u5341\u4e00) \u2014\u2014 \u4ece\u7ba1\u9053\u539f\u7406\u5230\u8fdb\u7a0b\u6c60\u5b9e\u6218<\/h2>\n<\/p>\n

\u6587\u7ae0\u76ee\u5f55<\/h4>\n
    \n
  • Linux \u7cfb\u7edf\u7bc7(\u4e09\u5341\u4e00) \u2014\u2014 \u4ece\u7ba1\u9053\u539f\u7406\u5230\u8fdb\u7a0b\u6c60\u5b9e\u6218<\/li>\n
  • \n
      \n
    • \u4e00\u3001\u8fdb\u7a0b\u95f4\u901a\u4fe1：\u4e3a\u4ec0\u4e48\u8fdb\u7a0b\u4e4b\u95f4\u9700\u8981\u901a\u4fe1？<\/li>\n
    • \n
        \n
      • 1.1 \u5148\u601d\u8003\u4e00\u4e2a\u95ee\u9898：\u4e24\u4e2a\u8fdb\u7a0b，\u600e\u4e48\u624d\u80fd\u4ea4\u6362\u6570\u636e？<\/li>\n
      • 1.2 \u8fdb\u7a0b\u95f4\u901a\u4fe1\u8981\u89e3\u51b3\u54ea\u4e9b\u95ee\u9898？<\/li>\n
      • 1.3 Linux \u8fdb\u7a0b\u95f4\u901a\u4fe1\u662f\u600e\u6837\u53d1\u5c55\u8d77\u6765\u7684？<\/li>\n<\/ul>\n<\/li>\n
      • \u4e8c\u3001\u7ba1\u9053：\u80fd\u4e0d\u80fd\u8ba9\u4e00\u4e2a\u8fdb\u7a0b\u5199，\u53e6\u4e00\u4e2a\u8fdb\u7a0b\u8bfb？<\/li>\n
      • \n
          \n
        • 2.1 \u4ece\u4e00\u4e2a\u5b9e\u9645\u95ee\u9898\u5f00\u59cb<\/li>\n
        • 2.2 \u4ec0\u4e48\u662f\u7ba1\u9053？<\/li>\n
        • 2.3 \u4e3a\u4ec0\u4e48\u8bf4\u7ba1\u9053\u662f\u4e00\u79cd\u5b57\u8282\u6d41？<\/li>\n
        • 2.4 \u7ba1\u9053\u5206\u4e3a\u54ea\u51e0\u79cd？<\/li>\n
        • \n
            \n
          • \u533f\u540d\u7ba1\u9053<\/li>\n
          • \u547d\u540d\u7ba1\u9053<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n
          • \u4e09\u3001\u533f\u540d\u7ba1\u9053：pipe() \u5230\u5e95\u505a\u4e86\u4ec0\u4e48？<\/li>\n
          • \n
              \n
            • 3.1 \u5148\u8ba4\u8bc6 pipe() \u51fd\u6570<\/li>\n
            • 3.2 \u4e3a\u4ec0\u4e48\u521b\u5efa\u4e00\u4e2a\u7ba1\u9053，\u9700\u8981\u8fd4\u56de\u4e24\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26？<\/li>\n<\/ul>\n<\/li>\n
            • \u56db\u3001fork() \u4e0e\u533f\u540d\u7ba1\u9053：\u7236\u5b50\u8fdb\u7a0b\u4e3a\u4ec0\u4e48\u80fd\u591f\u901a\u4fe1？<\/li>\n
            • \n
                \n
              • 4.1 \u5148\u521b\u5efa\u7ba1\u9053，\u518d\u521b\u5efa\u5b50\u8fdb\u7a0b<\/li>\n
              • 4.2 \u7236\u5b50\u8fdb\u7a0b\u901a\u4fe1\u65f6，\u4e3a\u4ec0\u4e48\u8981\u5173\u95ed\u4e0d\u4f7f\u7528\u7684\u7aef？<\/li>\n
              • 4.3 \u4e00\u4e2a\u5b8c\u6574\u7684\u7236\u5b50\u8fdb\u7a0b\u7ba1\u9053\u7a0b\u5e8f<\/li>\n
              • 4.4 \u7236\u5b50\u8fdb\u7a0b\u4e3a\u4ec0\u4e48\u80fd\u591f\u901a\u8fc7\u7ba1\u9053\u901a\u4fe1？<\/li>\n
              • 4.5 \u4e3a\u4ec0\u4e48\u7236\u8fdb\u7a0b\u80fd\u591f\u8bfb\u5230 EOF？<\/li>\n
              • 4.6 EOF \u548c `waitpid()` \u6709\u4ec0\u4e48\u533a\u522b？<\/li>\n<\/ul>\n<\/li>\n
              • \u4e94\u3001\u4ece\u6587\u4ef6\u63cf\u8ff0\u7b26\u7684\u89d2\u5ea6\u7406\u89e3\u7ba1\u9053<\/li>\n
              • \n
                  \n
                • 5.1 \u6587\u4ef6\u63cf\u8ff0\u7b26\u4e0d\u7b49\u4e8e\u771f\u6b63\u7684\u6570\u636e\u5bf9\u8c61<\/li>\n
                • 5.2 fork() \u540e，\u7236\u5b50\u8fdb\u7a0b\u5982\u4f55\u5171\u4eab\u7ba1\u9053？<\/li>\n
                • 5.3 \u4e3a\u4ec0\u4e48\u5173\u95ed\u4e00\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26，\u4e0d\u4f1a\u5f71\u54cd\u53e6\u4e00\u4e2a\u8fdb\u7a0b？<\/li>\n
                • 5.4 \u6587\u4ef6\u63cf\u8ff0\u7b26\u8868\u548c\u7ba1\u9053\u7f13\u51b2\u533a\u6709\u4ec0\u4e48\u533a\u522b？<\/li>\n<\/ul>\n<\/li>\n
                • \u516d\u3001\u4ece\u5185\u6838\u7684\u89d2\u5ea6\u7406\u89e3\u7ba1\u9053<\/li>\n
                • \n
                    \n
                  • 6.1 \u7ba1\u9053\u4e2d\u7684\u6570\u636e\u5b58\u653e\u5728\u54ea\u91cc？<\/li>\n<\/ul>\n<\/li>\n
                  • \u4e03\u3001\u7ba1\u9053\u7684\u8bfb\u5199\u89c4\u5219<\/li>\n
                  • \n
                      \n
                    • 7.1 \u7ba1\u9053\u4e3a\u7a7a\u65f6，read() \u4f1a\u600e\u6837？<\/li>\n
                    • 7.2 \u7ba1\u9053\u5199\u6ee1\u65f6，write() \u4f1a\u600e\u6837？<\/li>\n
                    • 7.3 \u6240\u6709\u5199\u7aef\u5173\u95ed\u540e，\u4e3a\u4ec0\u4e48 read() \u4f1a\u8fd4\u56de 0？<\/li>\n<\/ul>\n<\/li>\n
                    • \u516b\u3001\u7ba1\u9053\u7684\u4e3b\u8981\u7279\u70b9<\/li>\n
                    • \n
                        \n
                      • 8.1 \u533f\u540d\u7ba1\u9053\u901a\u5e38\u7528\u4e8e\u76f8\u5173\u8fdb\u7a0b\u4e4b\u95f4\u901a\u4fe1<\/li>\n
                      • 8.2 \u7ba1\u9053\u63d0\u4f9b\u5b57\u8282\u6d41\u670d\u52a1<\/li>\n
                      • 8.3 \u7ba1\u9053\u7684\u751f\u547d\u5468\u671f\u4e0e\u5f15\u7528\u6709\u5173<\/li>\n
                      • 8.4 \u7ba1\u9053\u7531\u5185\u6838\u534f\u8c03\u8bfb\u5199<\/li>\n<\/ul>\n<\/li>\n
                      • \u4e5d\u3001\u7528\u56db\u79cd\u5178\u578b\u60c5\u51b5\u9a8c\u8bc1\u7ba1\u9053\u89c4\u5219<\/li>\n
                      • \n
                          \n
                        • 9.1 \u60c5\u51b5\u4e00：\u8bfb\u7aef\u6b63\u5e38，\u5199\u7aef\u6b63\u5e38<\/li>\n
                        • 9.2 \u60c5\u51b5\u4e8c：\u5199\u7aef\u6b63\u5e38，\u4f46\u7ba1\u9053\u4e3a\u7a7a<\/li>\n
                        • 9.3 \u60c5\u51b5\u4e09：\u5199\u7aef\u5173\u95ed，\u8bfb\u7aef\u6b63\u5e38<\/li>\n
                        • 9.4 \u60c5\u51b5\u56db：\u8bfb\u7aef\u5173\u95ed，\u5199\u7aef\u6b63\u5e38<\/li>\n<\/ul>\n<\/li>\n
                        • \u5341\u3001\u4ece\u7ba1\u9053\u5230\u8fdb\u7a0b\u6c60：\u4e3a\u4ec0\u4e48\u9700\u8981\u591a\u4e2a\u5b50\u8fdb\u7a0b？<\/li>\n
                        • \n
                            \n
                          • 10.1 \u4ec0\u4e48\u662f\u8fdb\u7a0b\u6c60？<\/li>\n
                          • 10.2 \u4e3a\u4ec0\u4e48\u8fdb\u7a0b\u6c60\u9700\u8981\u7ba1\u9053？<\/li>\n<\/ul>\n<\/li>\n
                          • \u5341\u4e00\u3001\u4efb\u52a1\u7ba1\u7406\u5668：\u5982\u4f55\u6839\u636e\u7f16\u53f7\u6267\u884c\u4efb\u52a1？<\/li>\n
                          • \u5341\u4e8c\u3001Channel：\u7ba1\u7406\u7236\u8fdb\u7a0b\u4e0e\u5b50\u8fdb\u7a0b\u7684\u901a\u4fe1<\/li>\n
                          • \u5341\u4e09\u3001ChannelManager：\u5982\u4f55\u8f6e\u6d41\u9009\u62e9\u5b50\u8fdb\u7a0b？<\/li>\n
                          • \u5341\u56db\u3001ProcessPool：\u628a\u591a\u4e2a\u7ec4\u4ef6\u7ec4\u7ec7\u8d77\u6765<\/li>\n
                          • \n
                              \n
                            • 14.1 Start()：\u521b\u5efa\u7ba1\u9053\u548c\u5b50\u8fdb\u7a0b<\/li>\n
                            • 14.2 \u4e3a\u4ec0\u4e48\u5b50\u8fdb\u7a0b\u5fc5\u987b\u5173\u95ed\u7ee7\u627f\u6765\u7684\u65e7\u5199\u7aef？<\/li>\n
                            • 14.3 Work()：\u5b50\u8fdb\u7a0b\u5982\u4f55\u6267\u884c\u4efb\u52a1？<\/li>\n
                            • 14.4 Run()：\u7236\u8fdb\u7a0b\u5982\u4f55\u6d3e\u53d1\u4efb\u52a1？<\/li>\n
                            • 14.5 Stop()：\u5982\u4f55\u8ba9\u5b50\u8fdb\u7a0b\u6b63\u5e38\u9000\u51fa？<\/li>\n<\/ul>\n<\/li>\n
                            • \u7ed3\u8bed：<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
                              \n

                              \u4e00\u3001\u8fdb\u7a0b\u95f4\u901a\u4fe1：\u4e3a\u4ec0\u4e48\u8fdb\u7a0b\u4e4b\u95f4\u9700\u8981\u901a\u4fe1？<\/h3>\n

                              1.1 \u5148\u601d\u8003\u4e00\u4e2a\u95ee\u9898：\u4e24\u4e2a\u8fdb\u7a0b，\u600e\u4e48\u624d\u80fd\u4ea4\u6362\u6570\u636e？<\/h4>\n

                              \u2003\u2003\u4e00\u4e2a\u7a0b\u5e8f\u8fd0\u884c\u8d77\u6765，\u5c31\u4f1a\u5f62\u6210\u4e00\u4e2a\u8fdb\u7a0b\u3002\u6bcf\u4e2a\u8fdb\u7a0b\u90fd\u6709\u81ea\u5df1\u7684\u5730\u5740\u7a7a\u95f4\u3001\u4ee3\u7801\u3001\u6570\u636e\u4ee5\u53ca\u76f8\u5e94\u7684\u8fd0\u884c\u72b6\u6001\u3002\u64cd\u4f5c\u7cfb\u7edf\u901a\u8fc7\u8fdb\u7a0b\u7ba1\u7406\u673a\u5236，\u8ba9\u591a\u4e2a\u8fdb\u7a0b\u80fd\u591f\u5e76\u53d1\u6267\u884c\u3002<\/p>\n

                              \u2003\u2003\u4f8b\u5982，\u6211\u4eec\u5728 Linux \u4e2d\u6253\u5f00\u4e24\u4e2a\u7ec8\u7aef，\u5206\u522b\u8fd0\u884c\u4e24\u4e2a\u7a0b\u5e8f：<\/p>\n

                                \n
                              • \u8fdb\u7a0b A：\u8d1f\u8d23\u8bfb\u53d6\u7528\u6237\u8f93\u5165\u7684\u6570\u636e\u3002<\/li>\n
                              • \u8fdb\u7a0b B：\u8d1f\u8d23\u5904\u7406\u6570\u636e，\u5e76\u5c06\u5904\u7406\u7ed3\u679c\u8f93\u51fa\u5230\u5c4f\u5e55\u4e0a\u3002<\/li>\n<\/ul>\n

                                \u2003\u2003\u73b0\u5728\u95ee\u9898\u6765\u4e86：\u8fdb\u7a0b A \u8bfb\u53d6\u5230\u7684\u6570\u636e，\u5e94\u8be5\u600e\u4e48\u4ea4\u7ed9\u8fdb\u7a0b B？<\/p>\n

                                \u2003\u2003\u5728\u5355\u4e2a\u8fdb\u7a0b\u5185\u90e8，\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u53d8\u91cf\u3001\u6570\u7ec4\u3001\u6307\u9488\u7b49\u65b9\u5f0f\u4f20\u9012\u6570\u636e\u3002\u4f46\u4e24\u4e2a\u72ec\u7acb\u8fdb\u7a0b\u4e4b\u95f4，\u4e8b\u60c5\u5c31\u6ca1\u6709\u8fd9\u4e48\u7b80\u5355\u4e86\u3002<\/p>\n

                                \u2003\u2003\u539f\u56e0\u5728\u4e8e，\u6bcf\u4e2a\u8fdb\u7a0b\u901a\u5e38\u62e5\u6709\u72ec\u7acb\u7684\u865a\u62df\u5730\u5740\u7a7a\u95f4\u3002<\/p>\n

                                \u2003\u2003\u5047\u8bbe\u8fdb\u7a0b A \u4e2d\u5b58\u5728\u4e00\u4e2a\u53d8\u91cf：<\/p>\n

                                int<\/span> number =<\/span> 100<\/span>;<\/span><\/p>\n

                                \u2003\u2003\u8fdb\u7a0b A \u53ef\u4ee5\u901a\u8fc7\u81ea\u5df1\u7684\u5730\u5740\u7a7a\u95f4\u8bbf\u95ee\u8fd9\u4e2a\u53d8\u91cf，\u4f46\u8fdb\u7a0b B \u4e0d\u80fd\u76f4\u63a5\u4f7f\u7528\u8fdb\u7a0b A \u4e2d\u7684\u666e\u901a\u6307\u9488，\u6765\u8bbf\u95ee\u540c\u4e00\u4e2a\u53d8\u91cf\u3002<\/p>\n

                                \u2003\u2003\u56e0\u4e3a\u8fd9\u4e2a\u5730\u5740\u5c5e\u4e8e\u8fdb\u7a0b A \u7684\u865a\u62df\u5730\u5740\u7a7a\u95f4\u3002\u5373\u4f7f\u8fdb\u7a0b B \u4e2d\u5b58\u5728\u6570\u503c\u76f8\u540c\u7684\u865a\u62df\u5730\u5740，\u4e5f\u4e0d\u4ee3\u8868\u5b83\u4eec\u6307\u5411\u540c\u4e00\u5757\u7269\u7406\u5185\u5b58\u3002<\/p>\n

                                \u2003\u2003\u56e0\u6b64，\u6211\u4eec\u9700\u8981\u4e00\u79cd\u673a\u5236，\u8ba9\u4e24\u4e2a\u8fdb\u7a0b\u80fd\u591f\u6309\u7167\u4e00\u5b9a\u7684\u89c4\u5219\u4ea4\u6362\u6570\u636e\u3002<\/p>\n

                                \u2003\u2003\u8fd9\u79cd\u673a\u5236，\u5c31\u662f\u8fdb\u7a0b\u95f4\u901a\u4fe1（IPC，Inter-Process Communication）\u3002<\/p>\n

                                1.2 \u8fdb\u7a0b\u95f4\u901a\u4fe1\u8981\u89e3\u51b3\u54ea\u4e9b\u95ee\u9898？<\/h4>\n

                                \u2003\u2003\u6211\u4eec\u53ef\u4ee5\u5c06\u5176\u5f52\u7eb3\u4e3a\u4ee5\u4e0b\u56db\u7c7b\u3002<\/p>\n

                                \u6570\u636e\u4f20\u8f93\u3002\u6700\u76f4\u63a5\u7684\u9700\u6c42：\u4e00\u4e2a\u8fdb\u7a0b\u628a\u6570\u636e\u4ea4\u7ed9\u53e6\u4e00\u4e2a\u8fdb\u7a0b\u3002\u6bd4\u5982 ps aux | grep nginx，ps \u7684\u8f93\u51fa\u8981\u4f20\u7ed9 grep\u3002<\/p>\n

                                \u8d44\u6e90\u5171\u4eab\u3002\u591a\u4e2a\u8fdb\u7a0b\u9700\u8981\u64cd\u4f5c\u540c\u4e00\u4efd\u6570\u636e，\u6bd4\u5982\u591a\u4e2a worker \u8fdb\u7a0b\u8bfb\u53d6\u540c\u4e00\u4efd\u914d\u7f6e，\u6216\u8005\u5171\u4eab\u4e00\u5757\u7f13\u5b58\u3002<\/p>\n

                                \u901a\u77e5\u4e8b\u4ef6\u3002\u4e00\u4e2a\u8fdb\u7a0b\u9700\u8981\u544a\u8bc9\u53e6\u4e00\u4e2a\u8fdb\u7a0b\u201c\u67d0\u4ef6\u4e8b\u53d1\u751f\u4e86\u201d\u3002\u6700\u5178\u578b\u7684\u662f\u7236\u8fdb\u7a0b\u9700\u8981\u77e5\u9053\u5b50\u8fdb\u7a0b\u4ec0\u4e48\u65f6\u5019\u7ec8\u6b62，\u624d\u80fd\u53bb\u56de\u6536\u5b83，\u907f\u514d\u50f5\u5c38\u8fdb\u7a0b\u3002<\/p>\n

                                \u8fdb\u7a0b\u63a7\u5236\u3002\u6709\u65f6\u5019\u4e00\u4e2a\u8fdb\u7a0b\u9700\u8981\u5b8c\u5168\u63a7\u5236\u53e6\u4e00\u4e2a\u8fdb\u7a0b\u7684\u6267\u884c，\u6bd4\u5982\u8c03\u8bd5\u5668\u9700\u8981\u62e6\u622a\u88ab\u8c03\u8bd5\u8fdb\u7a0b\u7684\u4fe1\u53f7\u3001\u67e5\u770b\u5b83\u7684\u5bc4\u5b58\u5668\u72b6\u6001\u3001\u5355\u6b65\u6267\u884c\u3002ptrace \u5c31\u662f\u8fd9\u7c7b\u9700\u6c42\u7684\u5b9e\u73b0\u3002<\/p>\n

                                \u2003\u2003\u8fd9\u56db\u7c7b\u9700\u6c42，\u5bf9\u5e94\u7684 IPC \u673a\u5236\u5404\u6709\u4fa7\u91cd\u3002\u7ba1\u9053\u64c5\u957f\u7684\u662f\u201c\u6570\u636e\u4f20\u8f93\u201d\u548c\u4e00\u5b9a\u7a0b\u5ea6\u7684\u201c\u901a\u77e5\u4e8b\u4ef6\u201d；\u5171\u4eab\u5185\u5b58\u64c5\u957f\u201c\u8d44\u6e90\u5171\u4eab\u201d；\u4fe1\u53f7\u64c5\u957f\u201c\u901a\u77e5\u4e8b\u4ef6\u201d；\u800c socket \u548c\u4fe1\u53f7\u91cf\u5219\u5404\u81ea\u8986\u76d6\u66f4\u4e13\u95e8\u7684\u573a\u666f\u3002<\/p>\n

                                1.3 Linux \u8fdb\u7a0b\u95f4\u901a\u4fe1\u662f\u600e\u6837\u53d1\u5c55\u8d77\u6765\u7684？<\/h4>\n

                                \u2003\u2003Linux \u7684 IPC \u673a\u5236\u4e0d\u662f\u4e00\u53e3\u6c14\u8bbe\u8ba1\u51fa\u6765\u7684，\u800c\u662f\u7ecf\u5386\u4e86\u51e0\u4e2a\u9636\u6bb5\u7684\u5806\u79ef\u3002<\/p>\n

                                \u7b2c\u4e00\u4ee3：\u7ba1\u9053\u548c\u4fe1\u53f7\u3002Unix \u6700\u65e9\u671f\u7684 IPC \u624b\u6bb5，\u7b80\u5355\u7c97\u66b4，\u7ba1\u9053\u7528\u4e8e\u5b57\u8282\u6d41\u4f20\u8f93，\u4fe1\u53f7\u7528\u4e8e\u5f02\u6b65\u4e8b\u4ef6\u901a\u77e5\u3002\u8fd9\u4e00\u4ee3\u673a\u5236\u7684\u95ee\u9898\u4e5f\u5f88\u660e\u663e：\u7ba1\u9053\u53ea\u80fd\u7528\u4e8e\u6709\u4eb2\u7f18\u5173\u7cfb\u7684\u8fdb\u7a0b（\u533f\u540d\u7ba1\u9053），\u4fe1\u53f7\u80fd\u643a\u5e26\u7684\u4fe1\u606f\u51e0\u4e4e\u4e3a\u96f6\u3002<\/p>\n

                                \u7b2c\u4e8c\u4ee3：System V IPC\u3002AT&T \u5728 System V Unix \u4e2d\u5bf9\u65e9\u671f IPC \u505a\u4e86\u7cfb\u7edf\u6027\u7684\u6539\u8fdb\u548c\u6269\u5145，\u5f62\u6210\u4e86 System V \u6d88\u606f\u961f\u5217\u3001System V \u5171\u4eab\u5185\u5b58\u3001System V \u4fe1\u53f7\u91cf\u8fd9\u4e00\u5957\u3002\u5b83\u4eec\u5728\u5355\u4e2a\u8ba1\u7b97\u673a\u5185\u5de5\u4f5c，\u63a5\u53e3\u98ce\u683c\u7edf\u4e00，\u4f46\u751f\u547d\u5468\u671f\u7ba1\u7406\u548c\u6743\u9650\u6a21\u578b\u7ecf\u5e38\u88ab\u5410\u69fd\u2014\u2014\u521b\u5efa\u4e00\u4e2a IPC \u5bf9\u8c61\u540e\u5982\u679c\u8fdb\u7a0b\u5f02\u5e38\u9000\u51fa，\u5bf9\u8c61\u53ef\u80fd\u6b8b\u7559\u5728\u5185\u6838\u91cc\u3002<\/p>\n

                                \u7b2c\u4e09\u4ee3：POSIX IPC\u3002POSIX \u5728 System V \u7684\u57fa\u7840\u4e0a\u91cd\u65b0\u8bbe\u8ba1\u4e86\u4e00\u5957\u63a5\u53e3，\u5305\u62ec mq_open\u3001shm_open\u3001sem_open \u7b49，\u8bbe\u8ba1\u4e0a\u66f4\u63a5\u8fd1\u6587\u4ef6\u64cd\u4f5c，\u751f\u547d\u5468\u671f\u4e5f\u66f4\u53ef\u63a7\u3002Linux \u4ece\u4e00\u5f00\u59cb\u5c31\u9075\u5faa POSIX \u6807\u51c6，\u6240\u4ee5\u73b0\u4ee3 Linux \u4e0a POSIX IPC \u662f\u66f4\u63a8\u8350\u7684\u9009\u62e9\u3002<\/p>\n

                                \u2003\u2003\u628a\u8fd9\u5f20\u5206\u7c7b\u56fe\u653e\u5728\u8111\u5b50\u91cc：<\/p>\n\n\u4e16\u4ee3\u4ee3\u8868\u673a\u5236\u6838\u5fc3\u7279\u70b9<\/tr>\n\n\n\n\n
                                \u65e9\u671f Unix<\/td>\n\u533f\u540d\u7ba1\u9053\u3001\u547d\u540d\u7ba1\u9053\u3001\u4fe1\u53f7<\/td>\n\u7b80\u5355，\u4f46\u80fd\u529b\u6709\u9650<\/td>\n<\/tr>\n
                                System V<\/td>\n\u6d88\u606f\u961f\u5217\u3001\u5171\u4eab\u5185\u5b58\u3001\u4fe1\u53f7\u91cf<\/td>\n\u529f\u80fd\u5f3a，\u4f46\u751f\u547d\u5468\u671f\u7c97\u7cd9<\/td>\n<\/tr>\n
                                POSIX<\/td>\nmq_*\u3001shm_*\u3001sem_*\u3001\u4e92\u65a5\u91cf\u3001\u6761\u4ef6\u53d8\u91cf\u3001\u8bfb\u5199\u9501<\/td>\n\u63a5\u53e3\u66f4\u5e72\u51c0，\u751f\u547d\u5468\u671f\u66f4\u53ef\u63a7<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

                                \u2003\u2003\u672c\u7bc7\u535a\u5ba2\u805a\u7126\u5728\u7ba1\u9053\u4e0a，\u4f46\u4f60\u4f1a\u53d1\u73b0，\u7ba1\u9053\u7684\u8bbe\u8ba1\u601d\u60f3\u2014\u2014\u201c\u4e00\u5207\u7686\u6587\u4ef6\u201d\u2014\u2014\u8d2f\u7a7f\u4e86\u6574\u4e2a Linux IPC \u4f53\u7cfb\u3002<\/p>\n

                                \n

                                \u4e8c\u3001\u7ba1\u9053：\u80fd\u4e0d\u80fd\u8ba9\u4e00\u4e2a\u8fdb\u7a0b\u5199，\u53e6\u4e00\u4e2a\u8fdb\u7a0b\u8bfb？<\/h3>\n

                                2.1 \u4ece\u4e00\u4e2a\u5b9e\u9645\u95ee\u9898\u5f00\u59cb<\/h4>\n

                                \u2003\u2003\u5047\u8bbe\u73b0\u5728\u6709\u4e24\u4e2a\u8fdb\u7a0b：<\/p>\n

                                  \n
                                • \u8fdb\u7a0b A \u8d1f\u8d23\u751f\u4ea7\u6570\u636e\u3002<\/li>\n
                                • \u8fdb\u7a0b B \u8d1f\u8d23\u6d88\u8d39\u6570\u636e\u3002<\/li>\n<\/ul>\n

                                  \u2003\u2003\u6211\u4eec\u5e0c\u671b\u8fdb\u7a0b A \u4ea7\u751f\u6570\u636e\u4e4b\u540e，\u8fdb\u7a0b B \u80fd\u591f\u63a5\u6536\u5230\u8fd9\u4e9b\u6570\u636e\u3002<\/p>\n

                                  \u2003\u2003\u6700\u76f4\u63a5\u7684\u60f3\u6cd5\u53ef\u80fd\u662f：\u8fdb\u7a0b A \u628a\u6570\u636e\u5199\u5165\u4e00\u4e2a\u53d8\u91cf，\u8fdb\u7a0b B \u518d\u4ece\u8fd9\u4e2a\u53d8\u91cf\u4e2d\u8bfb\u53d6\u3002<\/p>\n

                                  \u2003\u2003\u4f46\u662f，\u666e\u901a\u53d8\u91cf\u4f4d\u4e8e\u8fdb\u7a0b\u5404\u81ea\u7684\u5730\u5740\u7a7a\u95f4\u4e2d\u3002\u4e24\u4e2a\u4e92\u76f8\u72ec\u7acb\u7684\u8fdb\u7a0b，\u5e76\u4e0d\u80fd\u76f4\u63a5\u901a\u8fc7\u540c\u4e00\u4e2a\u666e\u901a\u53d8\u91cf\u5b8c\u6210\u901a\u4fe1\u3002<\/p>\n

                                  \u2003\u2003\u90a3\u6211\u4eec\u6362\u4e00\u79cd\u601d\u8def\u3002<\/p>\n

                                  \u2003\u2003\u80fd\u4e0d\u80fd\u5728\u5185\u6838\u4e2d\u51c6\u5907\u4e00\u5757\u7528\u4e8e\u6682\u5b58\u6570\u636e\u7684\u533a\u57df？<\/p>\n

                                  \u2003\u2003\u8fdb\u7a0b A \u5c06\u6570\u636e\u5199\u8fdb\u53bb，\u8fdb\u7a0b B \u518d\u4ece\u91cc\u9762\u8bfb\u51fa\u6765\u3002<\/p>\n

                                  \u2003\u2003\u8fd9\u6837，\u4e24\u4e2a\u8fdb\u7a0b\u5c31\u4e0d\u9700\u8981\u76f4\u63a5\u8bbf\u95ee\u5bf9\u65b9\u7684\u666e\u901a\u53d8\u91cf，\u53ea\u9700\u8981\u6309\u7167\u7edf\u4e00\u7684\u89c4\u5219\u64cd\u4f5c\u8fd9\u5757\u5185\u6838\u7ef4\u62a4\u7684\u533a\u57df\u3002<\/p>\n

                                  \u2003\u2003\u7ba1\u9053\u91c7\u7528\u7684\u5c31\u662f\u7c7b\u4f3c\u7684\u601d\u8def\u3002<\/p>\n

                                  2.2 \u4ec0\u4e48\u662f\u7ba1\u9053？<\/h4>\n

                                  \u2003\u2003\u7ba1\u9053\u662f Unix \u4e2d\u6700\u53e4\u8001\u7684\u8fdb\u7a0b\u95f4\u901a\u4fe1\u5f62\u5f0f\u4e4b\u4e00\u3002<\/p>\n

                                  \u2003\u2003\u6211\u4eec\u53ef\u4ee5\u5c06\u7ba1\u9053\u7406\u89e3\u6210\u4e00\u4e2a\u7531\u5185\u6838\u7ef4\u62a4\u7684\u3001\u7528\u4e8e\u5728\u8fdb\u7a0b\u4e4b\u95f4\u4f20\u9012\u5b57\u8282\u6d41\u7684\u901a\u9053\u3002<\/p>\n

                                  \u2003\u2003\u5b83\u6709\u4e24\u4e2a\u57fa\u672c\u64cd\u4f5c：<\/p>\n

                                    \n
                                  • \u5199\u7aef：\u5411\u7ba1\u9053\u4e2d\u5199\u5165\u6570\u636e\u3002<\/li>\n
                                  • \u8bfb\u7aef：\u4ece\u7ba1\u9053\u4e2d\u8bfb\u53d6\u6570\u636e\u3002<\/li>\n<\/ul>\n

                                    \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

                                    \u2003\u2003\u8fdb\u7a0b A \u4e0d\u9700\u8981\u77e5\u9053\u8fdb\u7a0b B \u7684\u5185\u90e8\u5b9e\u73b0，\u53ea\u9700\u8981\u628a\u6570\u636e\u5199\u5165\u7ba1\u9053\u3002<\/p>\n

                                    \u2003\u2003\u8fdb\u7a0b B \u4e5f\u4e0d\u9700\u8981\u77e5\u9053\u6570\u636e\u6700\u521d\u662f\u600e\u4e48\u4ea7\u751f\u7684，\u53ea\u9700\u8981\u4ece\u7ba1\u9053\u4e2d\u8bfb\u53d6\u6570\u636e\u3002<\/p>\n

                                    \u2003\u2003\u5185\u6838\u8d1f\u8d23\u7ef4\u62a4\u7ba1\u9053\u4e2d\u7684\u6570\u636e\u4ee5\u53ca\u76f8\u5e94\u7684\u8bfb\u5199\u72b6\u6001\u3002<\/p>\n

                                    2.3 \u4e3a\u4ec0\u4e48\u8bf4\u7ba1\u9053\u662f\u4e00\u79cd\u5b57\u8282\u6d41？<\/h4>\n

                                    \u2003\u2003\u8fd9\u662f\u5b66\u4e60\u7ba1\u9053\u65f6\u975e\u5e38\u91cd\u8981\u7684\u4e00\u4e2a\u77e5\u8bc6\u70b9\u3002<\/p>\n

                                    \u2003\u2003\u5047\u8bbe\u5199\u7aef\u8fde\u7eed\u5199\u5165\u4e24\u6b21\u6570\u636e：<\/p>\n

                                    write<\/span>(<\/span>wfd,<\/span> "hello"<\/span>,<\/span> 5<\/span>)<\/span>;<\/span>
                                    \nwrite<\/span>(<\/span>wfd,<\/span> "world"<\/span>,<\/span> 5<\/span>)<\/span>;<\/span><\/p>\n

                                    \u2003\u2003\u5199\u7aef\u8fdb\u884c\u4e86\u4e24\u6b21 write() \u8c03\u7528，\u6bcf\u6b21\u5199\u5165 5 \u4e2a\u5b57\u8282\u3002<\/p>\n

                                    \u2003\u2003\u8bfb\u7aef\u53ef\u80fd\u4e00\u6b21\u8bfb\u53d6 10 \u4e2a\u5b57\u8282，\u5f97\u5230：<\/p>\n

                                    helloworld<\/p>\n

                                    \u2003\u2003\u4e5f\u53ef\u80fd\u5148\u8bfb\u53d6 5 \u4e2a\u5b57\u8282，\u5f97\u5230：<\/p>\n

                                    hello<\/p>\n

                                    \u2003\u2003\u7136\u540e\u518d\u8bfb\u53d6\u53e6\u5916 5 \u4e2a\u5b57\u8282，\u5f97\u5230：<\/p>\n

                                    world<\/p>\n

                                    \u2003\u2003\u5bf9\u4e8e\u4e00\u822c\u7684\u7ba1\u9053\u8bfb\u5199，\u4e0d\u80fd\u8ba4\u4e3a\u4e00\u6b21 write() \u5c31\u5fc5\u7136\u5bf9\u5e94\u4e00\u6b21 read()\u3002<\/p>\n

                                    \u2003\u2003\u4f8b\u5982，\u5199\u7aef\u5199\u5165\u4e24\u4e2a\u903b\u8f91\u6d88\u606f：<\/p>\n

                                    \u6d88\u606f A
                                    \n\u6d88\u606f B<\/p>\n

                                    \u2003\u2003\u8bfb\u7aef\u53ef\u80fd\u4e00\u6b21\u5c31\u628a\u4e24\u6761\u6d88\u606f\u7684\u6570\u636e\u5168\u90e8\u8bfb\u51fa\u6765，\u4e5f\u53ef\u80fd\u53ea\u8bfb\u5230\u7b2c\u4e00\u6761\u6d88\u606f\u7684\u4e00\u90e8\u5206\u3002<\/p>\n

                                    \u2003\u2003\u7ba1\u9053\u53ea\u8d1f\u8d23\u6309\u7167\u5b57\u8282\u987a\u5e8f\u4f20\u9012\u6570\u636e，\u5e76\u4e0d\u7406\u89e3\u8fd9\u4e9b\u5b57\u8282\u5728\u4e1a\u52a1\u4e0a\u4ee3\u8868\u4ec0\u4e48\u3002<\/p>\n

                                    \u2003\u2003\u56e0\u6b64，\u7ba1\u9053\u662f\u9762\u5411\u5b57\u8282\u6d41\u7684\u901a\u4fe1\u673a\u5236，\u800c\u4e0d\u662f\u5929\u7136\u4fdd\u7559\u6d88\u606f\u8fb9\u754c\u7684\u901a\u4fe1\u673a\u5236\u3002<\/p>\n

                                    2.4 \u7ba1\u9053\u5206\u4e3a\u54ea\u51e0\u79cd？<\/h4>\n

                                    \u2003\u2003Linux \u4e2d\u6700\u5e38\u89c1\u7684\u7ba1\u9053\u6709\u4e24\u79cd\u3002<\/p>\n

                                    \u533f\u540d\u7ba1\u9053<\/h5>\n

                                    \u2003\u2003\u533f\u540d\u7ba1\u9053\u901a\u5e38\u901a\u8fc7 pipe() \u521b\u5efa\u3002<\/p>\n

                                    \u2003\u2003\u5b83\u6ca1\u6709\u4e00\u4e2a\u4f9b\u5176\u4ed6\u8fdb\u7a0b\u901a\u8fc7\u6587\u4ef6\u8def\u5f84\u76f4\u63a5\u6253\u5f00\u7684\u540d\u79f0，\u4e00\u822c\u7531\u4e00\u4e2a\u8fdb\u7a0b\u521b\u5efa，\u7136\u540e\u901a\u8fc7 fork() \u7b49\u65b9\u5f0f\u5c06\u7ba1\u9053\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u4ea4\u7ed9\u76f8\u5173\u8fdb\u7a0b\u4f7f\u7528\u3002<\/p>\n

                                    \u2003\u2003\u4f8b\u5982，\u7236\u8fdb\u7a0b\u521b\u5efa\u7ba1\u9053，\u518d\u521b\u5efa\u5b50\u8fdb\u7a0b，\u7236\u5b50\u8fdb\u7a0b\u5c31\u53ef\u4ee5\u901a\u8fc7\u8fd9\u4e2a\u7ba1\u9053\u8fdb\u884c\u901a\u4fe1\u3002<\/p>\n

                                    \u547d\u540d\u7ba1\u9053<\/h5>\n

                                    \u2003\u2003\u547d\u540d\u7ba1\u9053\u4e5f\u53eb FIFO，\u53ef\u4ee5\u901a\u8fc7\u6587\u4ef6\u7cfb\u7edf\u4e2d\u7684\u8def\u5f84\u627e\u5230\u3002<\/p>\n

                                    \u2003\u2003\u4f8b\u5982，\u53ef\u4ee5\u4f7f\u7528 mkfifo() \u521b\u5efa\u4e00\u4e2a\u547d\u540d\u7ba1\u9053：<\/p>\n

                                    mkfifo<\/span> myfifo<\/p>\n

                                    \u2003\u2003\u8fd9\u6837，\u4e24\u4e2a\u6ca1\u6709\u4eb2\u7f18\u5173\u7cfb\u7684\u8fdb\u7a0b，\u4e5f\u53ef\u4ee5\u901a\u8fc7\u7ea6\u5b9a\u597d\u7684 FIFO \u8def\u5f84\u6253\u5f00\u5b83\u5e76\u8fdb\u884c\u901a\u4fe1\u3002<\/p>\n

                                    \u2003\u2003\u672c\u6587\u5148\u7814\u7a76\u533f\u540d\u7ba1\u9053\u3002<\/p>\n

                                    \n

                                    \u4e09\u3001\u533f\u540d\u7ba1\u9053：pipe() \u5230\u5e95\u505a\u4e86\u4ec0\u4e48？<\/h3>\n

                                    3.1 \u5148\u8ba4\u8bc6 pipe() \u51fd\u6570<\/h4>\n

                                    \u2003\u2003Linux \u4e3a\u6211\u4eec\u63d0\u4f9b\u4e86 pipe() \u7cfb\u7edf\u8c03\u7528，\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u533f\u540d\u7ba1\u9053\u3002<\/p>\n

                                    \u5934\u6587\u4ef6：<\/p>\n

                                    #<\/span>include<\/span> <unistd.h><\/span><\/span><\/p>\n

                                    \u51fd\u6570\u539f\u578b：<\/p>\n

                                    int<\/span> pipe<\/span>(<\/span>int<\/span> fd[<\/span>2<\/span>]<\/span>)<\/span>;<\/span><\/p>\n

                                    \u2003\u2003\u53c2\u6570 fd \u662f\u4e00\u4e2a\u5305\u542b\u4e24\u4e2a\u6574\u6570\u7684\u6570\u7ec4，\u7528\u6765\u63a5\u6536\u521b\u5efa\u6210\u529f\u540e\u7684\u4e24\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26\u3002<\/p>\n

                                    \u8c03\u7528\u6210\u529f\u65f6：<\/p>\n

                                      \n
                                    • fd[0] \u8868\u793a\u7ba1\u9053\u8bfb\u7aef\u3002<\/li>\n
                                    • fd[1] \u8868\u793a\u7ba1\u9053\u5199\u7aef\u3002<\/li>\n<\/ul>\n

                                      \u8fd4\u56de\u503c：<\/p>\n

                                        \n
                                      • \u6210\u529f\u8fd4\u56de 0\u3002<\/li>\n
                                      • \u5931\u8d25\u8fd4\u56de -1，\u5e76\u8bbe\u7f6e errno，\u7528\u4e8e\u8bf4\u660e\u5931\u8d25\u539f\u56e0\u3002<\/li>\n<\/ul>\n

                                        \u4f8b\u5982：<\/p>\n

                                        int<\/span> fds[<\/span>2<\/span>]<\/span>;<\/span><\/p>\n

                                        if<\/span> (<\/span>pipe<\/span>(<\/span>fds)<\/span> ==<\/span> –<\/span>1<\/span>)<\/span>
                                        \n{<\/span>
                                        \n perror<\/span>(<\/span>"pipe"<\/span>)<\/span>;<\/span>
                                        \n return<\/span> 1<\/span>;<\/span>
                                        \n}<\/span><\/p>\n

                                        \u2003\u2003\u5982\u679c\u521b\u5efa\u6210\u529f，fds \u4e2d\u5c31\u4f1a\u4fdd\u5b58\u4e24\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26\u3002<\/p>\n

                                        3.2 \u4e3a\u4ec0\u4e48\u521b\u5efa\u4e00\u4e2a\u7ba1\u9053，\u9700\u8981\u8fd4\u56de\u4e24\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26？<\/h4>\n

                                        \u2003\u2003\u5148\u56de\u5fc6\u4e00\u4e0b\u6587\u4ef6\u63cf\u8ff0\u7b26\u7684\u6982\u5ff5\u3002<\/p>\n

                                        \u2003\u2003\u5728 Linux \u4e2d，\u6587\u4ef6\u63cf\u8ff0\u7b26\u662f\u4e00\u4e2a\u975e\u8d1f\u6574\u6570，\u7528\u4e8e\u6807\u8bc6\u5f53\u524d\u8fdb\u7a0b\u6253\u5f00\u7684\u6587\u4ef6\u6216\u5176\u4ed6 I\/O \u5bf9\u8c61\u3002<\/p>\n

                                        \u4f8b\u5982：<\/p>\n

                                        int<\/span> fd =<\/span> open<\/span>(<\/span>"test.txt"<\/span>,<\/span> O_RDONLY)<\/span>;<\/span><\/p>\n

                                        \u2003\u2003open() \u6210\u529f\u540e\u4f1a\u8fd4\u56de\u4e00\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26，\u540e\u7eed\u53ef\u4ee5\u901a\u8fc7 read(fd, …) \u4ece\u6587\u4ef6\u4e2d\u8bfb\u53d6\u6570\u636e\u3002<\/p>\n

                                        \u2003\u2003\u7ba1\u9053\u4e5f\u9075\u5faa\u7c7b\u4f3c\u7684\u4f7f\u7528\u65b9\u5f0f\u3002<\/p>\n

                                        \u2003\u2003\u4e0d\u8fc7，\u7ba1\u9053\u6709\u4e24\u4e2a\u4e0d\u540c\u7684\u64cd\u4f5c\u65b9\u5411：\u4e00\u4e2a\u7528\u4e8e\u8bfb\u53d6，\u4e00\u4e2a\u7528\u4e8e\u5199\u5165\u3002<\/p>\n

                                        \u2003\u2003\u56e0\u6b64，pipe() \u521b\u5efa\u6210\u529f\u540e\u4f1a\u63d0\u4f9b\u4e24\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26：<\/p>\n

                                        fds[<\/span>0<\/span>]<\/span> \/\/ \u8bfb\u7aef<\/span>
                                        \nfds[<\/span>1<\/span>]<\/span> \/\/ \u5199\u7aef<\/span><\/p>\n

                                        \u4f8b\u5982：<\/p>\n

                                        write<\/span>(<\/span>fds[<\/span>1<\/span>]<\/span>,<\/span> "hello"<\/span>,<\/span> 5<\/span>)<\/span>;<\/span><\/p>\n

                                        \u2003\u2003\u8fd9\u884c\u4ee3\u7801\u628a 5 \u4e2a\u5b57\u8282\u5199\u5165\u7ba1\u9053\u3002<\/p>\n

                                        \u968f\u540e：<\/p>\n

                                        char<\/span> buffer[<\/span>10<\/span>]<\/span>;<\/span><\/p>\n

                                        ssize_t n =<\/span> read<\/span>(<\/span>fds[<\/span>0<\/span>]<\/span>,<\/span> buffer,<\/span> sizeof<\/span>(<\/span>buffer)<\/span>)<\/span>;<\/span><\/p>\n

                                        \u2003\u2003\u8fd9\u884c\u4ee3\u7801\u4ece\u7ba1\u9053\u4e2d\u8bfb\u53d6\u6570\u636e\u3002<\/p>\n

                                        \u2003\u2003\u53ef\u4ee5\u53d1\u73b0，\u7ba1\u9053\u7684\u4f7f\u7528\u65b9\u5f0f\u4e0e\u6587\u4ef6\u975e\u5e38\u76f8\u4f3c\u3002<\/p>\n

                                        \u2003\u2003\u666e\u901a\u6587\u4ef6\u53ef\u4ee5\u901a\u8fc7 open() \u6253\u5f00，\u518d\u901a\u8fc7 read() \u548c write() \u64cd\u4f5c；\u533f\u540d\u7ba1\u9053\u5219\u901a\u8fc7 pipe() \u83b7\u53d6\u8bfb\u5199\u7aef，\u518d\u901a\u8fc7 read() \u548c write() \u64cd\u4f5c\u3002<\/p>\n

                                        \n

                                        \u56db\u3001fork() \u4e0e\u533f\u540d\u7ba1\u9053：\u7236\u5b50\u8fdb\u7a0b\u4e3a\u4ec0\u4e48\u80fd\u591f\u901a\u4fe1？<\/h3>\n

                                        4.1 \u5148\u521b\u5efa\u7ba1\u9053，\u518d\u521b\u5efa\u5b50\u8fdb\u7a0b<\/h4>\n

                                        \u2003\u2003\u524d\u9762\u5df2\u7ecf\u77e5\u9053，pipe() \u53ef\u4ee5\u521b\u5efa\u7ba1\u9053\u3002<\/p>\n

                                        \u2003\u2003\u4f46\u95ee\u9898\u6765\u4e86：\u5982\u679c\u7ba1\u9053\u6700\u521d\u662f\u7531\u7236\u8fdb\u7a0b\u521b\u5efa\u7684，\u5b50\u8fdb\u7a0b\u53c8\u600e\u4e48\u80fd\u591f\u8bbf\u95ee\u5b83？<\/p>\n

                                        \u7b54\u6848\u662f：fork()\u3002<\/p>\n

                                        \u2003\u2003\u5728 Linux \u4e2d，\u7236\u8fdb\u7a0b\u8c03\u7528 fork() \u521b\u5efa\u5b50\u8fdb\u7a0b\u65f6，\u5b50\u8fdb\u7a0b\u4f1a\u83b7\u5f97\u7236\u8fdb\u7a0b\u6587\u4ef6\u63cf\u8ff0\u7b26\u8868\u4e2d\u76f8\u5e94\u63cf\u8ff0\u7b26\u7684\u526f\u672c\u3002<\/p>\n

                                        \u2003\u2003\u8fd9\u610f\u5473\u7740，\u5982\u679c\u7236\u8fdb\u7a0b\u5728\u8c03\u7528 fork() \u4e4b\u524d\u5df2\u7ecf\u521b\u5efa\u4e86\u7ba1\u9053，\u90a3\u4e48\u5b50\u8fdb\u7a0b\u5c31\u53ef\u4ee5\u7ee7\u627f\u7ba1\u9053\u8bfb\u7aef\u548c\u5199\u7aef\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u3002<\/p>\n

                                        \u2003\u2003\u56e0\u6b64，\u7236\u5b50\u8fdb\u7a0b\u80fd\u591f\u901a\u8fc7\u540c\u4e00\u4e2a\u7ba1\u9053\u5bf9\u8c61\u8fdb\u884c\u901a\u4fe1\u3002<\/p>\n

                                        \u2003\u2003\u57fa\u672c\u6d41\u7a0b\u5982\u4e0b：<\/p>\n

                                        \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

                                        \u2003\u2003\u9700\u8981\u6ce8\u610f\u7684\u662f，\u8fd9\u91cc\u7684\u201c\u526f\u672c\u201d\u5e76\u4e0d\u662f\u91cd\u65b0\u521b\u5efa\u4e86\u4e00\u6761\u5b8c\u5168\u72ec\u7acb\u7684\u7ba1\u9053\u3002<\/p>\n

                                        \u2003\u2003\u7236\u5b50\u8fdb\u7a0b\u62e5\u6709\u5404\u81ea\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u8868，\u4f46\u5bf9\u5e94\u7684\u63cf\u8ff0\u7b26\u5f15\u7528\u7740\u540c\u4e00\u4e2a\u5e95\u5c42\u7ba1\u9053\u5bf9\u8c61\u3002<\/p>\n

                                        \u2003\u2003\u56e0\u6b64，\u7236\u8fdb\u7a0b\u5199\u5165\u7684\u6570\u636e，\u5b50\u8fdb\u7a0b\u53ef\u4ee5\u8bfb\u53d6；\u5b50\u8fdb\u7a0b\u5199\u5165\u7684\u6570\u636e，\u7236\u8fdb\u7a0b\u4e5f\u53ef\u4ee5\u8bfb\u53d6\u3002<\/p>\n

                                        \u2003\u2003\u4e0d\u8fc7，\u5982\u679c\u7236\u5b50\u8fdb\u7a0b\u90fd\u4fdd\u7559\u8bfb\u5199\u4e24\u7aef，\u5c31\u5bb9\u6613\u51fa\u73b0\u95ee\u9898\u3002\u4f8b\u5982，\u8bfb\u7aef\u7b49\u5f85\u6570\u636e\u65f6，\u5185\u6838\u53ef\u80fd\u53d1\u73b0\u4ecd\u7136\u6709\u5199\u7aef\u5904\u4e8e\u6253\u5f00\u72b6\u6001，\u4ece\u800c\u65e0\u6cd5\u5224\u65ad\u5199\u5165\u65b9\u5df2\u7ecf\u5168\u90e8\u9000\u51fa\u3002<\/p>\n

                                        \u2003\u2003\u56e0\u6b64，\u5efa\u7acb\u7236\u5b50\u8fdb\u7a0b\u901a\u4fe1\u540e，\u901a\u5e38\u9700\u8981\u5173\u95ed\u53cc\u65b9\u4e0d\u4f7f\u7528\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u3002<\/p>\n

                                        4.2 \u7236\u5b50\u8fdb\u7a0b\u901a\u4fe1\u65f6，\u4e3a\u4ec0\u4e48\u8981\u5173\u95ed\u4e0d\u4f7f\u7528\u7684\u7aef？<\/h4>\n

                                        \u2003\u2003\u5047\u8bbe\u6211\u4eec\u5e0c\u671b\u5b9e\u73b0\u8fd9\u6837\u7684\u901a\u4fe1\u5173\u7cfb：<\/p>\n

                                          \n
                                        • \u5b50\u8fdb\u7a0b\u8d1f\u8d23\u5199\u5165\u6570\u636e\u3002<\/li>\n
                                        • \u7236\u8fdb\u7a0b\u8d1f\u8d23\u8bfb\u53d6\u6570\u636e\u3002<\/li>\n<\/ul>\n

                                          \u2003\u2003\u90a3\u4e48，\u5b50\u8fdb\u7a0b\u53ea\u9700\u8981\u5199\u7aef，\u7236\u8fdb\u7a0b\u53ea\u9700\u8981\u8bfb\u7aef\u3002<\/p>\n

                                          \u2003\u2003\u6b63\u786e\u7684\u505a\u6cd5\u662f：<\/p>\n

                                          \u2003\u2003\u5b50\u8fdb\u7a0b\u5173\u95ed\u8bfb\u7aef：<\/p>\n

                                          close<\/span>(<\/span>fds[<\/span>0<\/span>]<\/span>)<\/span>;<\/span><\/p>\n

                                          \u2003\u2003\u7236\u8fdb\u7a0b\u5173\u95ed\u5199\u7aef：<\/p>\n

                                          close<\/span>(<\/span>fds[<\/span>1<\/span>]<\/span>)<\/span>;<\/span><\/p>\n

                                          \u2003\u2003\u4e3a\u4ec0\u4e48\u4e00\u5b9a\u8981\u5173\u95ed\u4e0d\u4f7f\u7528\u7684\u7aef？<\/p>\n

                                          \u2003\u2003\u56e0\u4e3a\u7ba1\u9053\u662f\u5426\u8fd8\u6709\u8bfb\u8005\u3001\u662f\u5426\u8fd8\u6709\u5199\u8005，\u53d6\u51b3\u4e8e\u5185\u6838\u5bf9\u76f8\u5173\u6253\u5f00\u5f15\u7528\u7684\u7ba1\u7406，\u800c\u4e0d\u662f\u53d6\u51b3\u4e8e\u6211\u4eec\u4e3b\u89c2\u4e0a\u8ba4\u4e3a\u54ea\u4e2a\u8fdb\u7a0b\u8d1f\u8d23\u8bfb\u3001\u54ea\u4e2a\u8fdb\u7a0b\u8d1f\u8d23\u5199\u3002<\/p>\n

                                          \u2003\u2003\u4f8b\u5982，\u5b50\u8fdb\u7a0b\u867d\u7136\u4e0d\u6253\u7b97\u8bfb\u53d6\u7ba1\u9053，\u4f46\u5982\u679c\u5b83\u4ecd\u7136\u4fdd\u7559\u8bfb\u7aef，\u90a3\u4e48\u7236\u8fdb\u7a0b\u5173\u95ed\u81ea\u5df1\u7684\u8bfb\u7aef\u4e4b\u540e，\u5185\u6838\u4ecd\u7136\u53ef\u80fd\u8ba4\u4e3a\u7ba1\u9053\u8fd8\u6709\u8bfb\u7aef\u5b58\u5728\u3002<\/p>\n

                                          \u2003\u2003\u8fd9\u4f1a\u5f71\u54cd\u5199\u7aef\u5bf9\u201c\u5df2\u7ecf\u6ca1\u6709\u8bfb\u8005\u201d\u7684\u5224\u65ad\u3002<\/p>\n

                                          \u2003\u2003\u540c\u6837，\u5982\u679c\u7236\u8fdb\u7a0b\u4e0d\u5173\u95ed\u5199\u7aef，\u5373\u4f7f\u5b50\u8fdb\u7a0b\u5df2\u7ecf\u9000\u51fa，\u7236\u8fdb\u7a0b\u4e5f\u53ef\u80fd\u65e0\u6cd5\u53ca\u65f6\u4ece\u7ba1\u9053\u8bfb\u53d6\u5230 EOF\u3002<\/p>\n

                                          4.3 \u4e00\u4e2a\u5b8c\u6574\u7684\u7236\u5b50\u8fdb\u7a0b\u7ba1\u9053\u7a0b\u5e8f<\/h4>\n

                                          \u2003\u2003\u4e0b\u9762\u901a\u8fc7\u4e00\u4e2a\u7b80\u5355\u7684\u7a0b\u5e8f，\u6f14\u793a\u7236\u5b50\u8fdb\u7a0b\u5982\u4f55\u5229\u7528\u533f\u540d\u7ba1\u9053\u901a\u4fe1，\u4ee5\u53ca\u7236\u8fdb\u7a0b\u5982\u4f55\u901a\u8fc7 EOF \u5224\u65ad\u5199\u7aef\u5df2\u7ecf\u5168\u90e8\u5173\u95ed\u3002<\/p>\n

                                          #<\/span>include<\/span> <iostream><\/span><\/span>
                                          \n#<\/span>include<\/span> <unistd.h><\/span><\/span>
                                          \n#<\/span>include<\/span> <cstring><\/span><\/span>
                                          \n#<\/span>include<\/span> <sys\/types.h><\/span><\/span>
                                          \n#<\/span>include<\/span> <sys\/wait.h><\/span><\/span><\/p>\n

                                          int<\/span> main<\/span>(<\/span>)<\/span>
                                          \n{<\/span>
                                          \n int<\/span> fds[<\/span>2<\/span>]<\/span>;<\/span><\/p>\n

                                          if<\/span> (<\/span>pipe<\/span>(<\/span>fds)<\/span> ==<\/span> –<\/span>1<\/span>)<\/span>
                                          \n {<\/span>
                                          \n perror<\/span>(<\/span>"pipe"<\/span>)<\/span>;<\/span>
                                          \n return<\/span> 1<\/span>;<\/span>
                                          \n }<\/span><\/p>\n

                                          pid_t id =<\/span> fork<\/span>(<\/span>)<\/span>;<\/span><\/p>\n

                                          if<\/span> (<\/span>id ==<\/span> –<\/span>1<\/span>)<\/span>
                                          \n {<\/span>
                                          \n perror<\/span>(<\/span>"fork"<\/span>)<\/span>;<\/span>
                                          \n close<\/span>(<\/span>fds[<\/span>0<\/span>]<\/span>)<\/span>;<\/span>
                                          \n close<\/span>(<\/span>fds[<\/span>1<\/span>]<\/span>)<\/span>;<\/span>
                                          \n return<\/span> 1<\/span>;<\/span>
                                          \n }<\/span><\/p>\n

                                          if<\/span> (<\/span>id ==<\/span> 0<\/span>)<\/span>
                                          \n {<\/span>
                                          \n \/\/ \u5b50\u8fdb\u7a0b\u8d1f\u8d23\u5199\u5165<\/span>
                                          \n close<\/span>(<\/span>fds[<\/span>0<\/span>]<\/span>)<\/span>;<\/span><\/p>\n

                                          const<\/span> char<\/span>*<\/span> msg =<\/span> "Hello, father!"<\/span>;<\/span>
                                          \n write<\/span>(<\/span>fds[<\/span>1<\/span>]<\/span>,<\/span> msg,<\/span> strlen<\/span>(<\/span>msg)<\/span>)<\/span>;<\/span><\/p>\n

                                          close<\/span>(<\/span>fds[<\/span>1<\/span>]<\/span>)<\/span>;<\/span>
                                          \n _exit<\/span>(<\/span>0<\/span>)<\/span>;<\/span>
                                          \n }<\/span><\/p>\n

                                          \/\/ \u7236\u8fdb\u7a0b\u8d1f\u8d23\u8bfb\u53d6<\/span>
                                          \n close<\/span>(<\/span>fds[<\/span>1<\/span>]<\/span>)<\/span>;<\/span><\/p>\n

                                          char<\/span> buffer[<\/span>1024<\/span>]<\/span>;<\/span>
                                          \n ssize_t n;<\/span><\/p>\n

                                          while<\/span> (<\/span>(<\/span>n =<\/span> read<\/span>(<\/span>fds[<\/span>0<\/span>]<\/span>,<\/span> buffer,<\/span> sizeof<\/span>(<\/span>buffer)<\/span> –<\/span> 1<\/span>)<\/span>)<\/span> ><\/span> 0<\/span>)<\/span>
                                          \n {<\/span>
                                          \n buffer[<\/span>n]<\/span> =<\/span> '\\\\0'<\/span>;<\/span>
                                          \n std::<\/span>cout <<<\/span> "child say: "<\/span> <<<\/span> buffer <<<\/span> std::<\/span>endl;<\/span>
                                          \n }<\/span><\/p>\n

                                          if<\/span> (<\/span>n ==<\/span> –<\/span>1<\/span>)<\/span>
                                          \n perror<\/span>(<\/span>"read"<\/span>)<\/span>;<\/span>
                                          \n else<\/span>
                                          \n std::<\/span>cout <<<\/span> "\u7ba1\u9053\u8bfb\u5230 EOF，\u5199\u7aef\u5df2\u7ecf\u5168\u90e8\u5173\u95ed"<\/span> <<<\/span> std::<\/span>endl;<\/span><\/p>\n

                                          close<\/span>(<\/span>fds[<\/span>0<\/span>]<\/span>)<\/span>;<\/span>
                                          \n waitpid<\/span>(<\/span>id,<\/span> nullptr<\/span>,<\/span> 0<\/span>)<\/span>;<\/span><\/p>\n

                                          return<\/span> 0<\/span>;<\/span>
                                          \n}<\/span><\/p>\n

                                          4.4 \u7236\u5b50\u8fdb\u7a0b\u4e3a\u4ec0\u4e48\u80fd\u591f\u901a\u8fc7\u7ba1\u9053\u901a\u4fe1？<\/h4>\n

                                          \u2003\u2003\u6574\u4e2a\u8fc7\u7a0b\u53ef\u4ee5\u6982\u62ec\u4e3a：<\/p>\n

                                        • \u7236\u8fdb\u7a0b\u8c03\u7528 pipe(fds)，\u521b\u5efa\u533f\u540d\u7ba1\u9053，\u83b7\u5f97\u8bfb\u7aef fds[0] \u548c\u5199\u7aef fds[1]\u3002<\/li>\n
                                        • \u7236\u8fdb\u7a0b\u8c03\u7528 fork()，\u5b50\u8fdb\u7a0b\u7ee7\u627f\u8fd9\u4e24\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26，\u56e0\u6b64\u7236\u5b50\u8fdb\u7a0b\u80fd\u591f\u8bbf\u95ee\u540c\u4e00\u4e2a\u5185\u6838\u7ba1\u9053\u3002<\/li>\n
                                        • \u5b50\u8fdb\u7a0b\u5173\u95ed\u8bfb\u7aef，\u7236\u8fdb\u7a0b\u5173\u95ed\u5199\u7aef，\u660e\u786e\u5404\u81ea\u7684\u901a\u4fe1\u65b9\u5411\u3002<\/li>\n
                                        • \u5b50\u8fdb\u7a0b\u8c03\u7528 write() \u5c06\u6570\u636e\u5199\u5165\u5185\u6838\u7ba1\u9053\u7f13\u51b2\u533a，\u7236\u8fdb\u7a0b\u8c03\u7528 read() \u8bfb\u53d6\u6570\u636e\u3002<\/li>\n

                                          \u2003\u2003\u7ba1\u9053\u901a\u4fe1\u7684\u5173\u952e，\u662f\u7236\u5b50\u8fdb\u7a0b\u901a\u8fc7\u6587\u4ef6\u63cf\u8ff0\u7b26\u8bbf\u95ee\u540c\u4e00\u4e2a\u5185\u6838\u7ba1\u9053\u5bf9\u8c61，\u800c\u4e0d\u662f\u76f4\u63a5\u8bbf\u95ee\u5bf9\u65b9\u7684\u5185\u5b58\u3002<\/p>\n

                                          4.5 \u4e3a\u4ec0\u4e48\u7236\u8fdb\u7a0b\u80fd\u591f\u8bfb\u5230 EOF？<\/h4>\n

                                          \u2003\u2003read() \u7684\u8fd4\u56de\u503c\u4e3b\u8981\u6709\u4e09\u79cd\u60c5\u51b5：<\/p>\n\n\u8fd4\u56de\u503c\u542b\u4e49<\/tr>\n\n\n\n\n
                                          \u5927\u4e8e 0<\/td>\n\u6210\u529f\u8bfb\u53d6\u5230\u6570\u636e<\/td>\n<\/tr>\n
                                          \u7b49\u4e8e 0<\/td>\n\u7ba1\u9053\u4e2d\u7684\u6570\u636e\u5df2\u7ecf\u8bfb\u5b8c，\u5e76\u4e14\u6240\u6709\u5199\u7aef\u90fd\u5df2\u5173\u95ed<\/td>\n<\/tr>\n
                                          \u7b49\u4e8e -1<\/td>\n\u8bfb\u53d6\u53d1\u751f\u9519\u8bef<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

                                          \u2003\u2003\u9700\u8981\u6ce8\u610f，\u5b50\u8fdb\u7a0b\u9000\u51fa\u4e0d\u4ee3\u8868\u7236\u8fdb\u7a0b\u7acb\u5373\u8bfb\u5230 EOF\u3002\u5982\u679c\u7ba1\u9053\u4e2d\u8fd8\u6709\u6570\u636e，\u7236\u8fdb\u7a0b\u9700\u8981\u5148\u5c06\u6570\u636e\u8bfb\u5b8c；\u5982\u679c\u8fd8\u6709\u5176\u4ed6\u8fdb\u7a0b\u6301\u6709\u5199\u7aef，\u7236\u8fdb\u7a0b\u4e5f\u53ef\u80fd\u7ee7\u7eed\u7b49\u5f85\u3002<\/p>\n

                                          \u2003\u2003\u56e0\u6b64，\u53ca\u65f6\u5173\u95ed\u4e0d\u9700\u8981\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u975e\u5e38\u91cd\u8981\u3002<\/p>\n

                                          4.6 EOF \u548c waitpid() \u6709\u4ec0\u4e48\u533a\u522b？<\/h4>\n

                                          \u2003\u2003\u4e8c\u8005\u89e3\u51b3\u7684\u662f\u4e0d\u540c\u7684\u95ee\u9898：<\/p>\n

                                            \n
                                          • EOF：\u8868\u793a\u7ba1\u9053\u4e2d\u7684\u6570\u636e\u5df2\u7ecf\u8bfb\u5b8c，\u5e76\u4e14\u6240\u6709\u5199\u7aef\u90fd\u5df2\u5173\u95ed\u3002<\/li>\n
                                          • waitpid()：\u7b49\u5f85\u5b50\u8fdb\u7a0b，\u5e76\u5728\u9002\u5f53\u60c5\u51b5\u4e0b\u56de\u6536\u5176\u9000\u51fa\u8d44\u6e90\u3002<\/li>\n<\/ul>\n

                                            \u2003\u2003\u6240\u4ee5，\u7236\u8fdb\u7a0b\u65e2\u8981\u6b63\u786e\u5173\u95ed\u6587\u4ef6\u63cf\u8ff0\u7b26，\u4e5f\u8981\u4f7f\u7528 waitpid() \u56de\u6536\u5b50\u8fdb\u7a0b\u3002<\/p>\n

                                            \n

                                            \u4e94\u3001\u4ece\u6587\u4ef6\u63cf\u8ff0\u7b26\u7684\u89d2\u5ea6\u7406\u89e3\u7ba1\u9053<\/h3>\n

                                            \u2003\u2003\u524d\u9762\u6211\u4eec\u77e5\u9053，pipe() \u521b\u5efa\u7ba1\u9053，fork() \u8ba9\u5b50\u8fdb\u7a0b\u7ee7\u627f\u7236\u8fdb\u7a0b\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u3002\u90a3\u4e48，\u4e3a\u4ec0\u4e48\u7236\u5b50\u8fdb\u7a0b\u80fd\u591f\u901a\u8fc7\u8fd9\u4e9b\u6587\u4ef6\u63cf\u8ff0\u7b26\u8bbf\u95ee\u540c\u4e00\u4e2a\u7ba1\u9053？<\/p>\n

                                            5.1 \u6587\u4ef6\u63cf\u8ff0\u7b26\u4e0d\u7b49\u4e8e\u771f\u6b63\u7684\u6570\u636e\u5bf9\u8c61<\/h4>\n

                                            \u2003\u2003\u5728 Linux \u4e2d，\u6587\u4ef6\u63cf\u8ff0\u7b26\u53ef\u4ee5\u7406\u89e3\u4e3a\u8fdb\u7a0b\u8bbf\u95ee\u5185\u6838\u5bf9\u8c61\u7684\u5165\u53e3\u7f16\u53f7\u3002<\/p>\n

                                            \u4f8b\u5982：<\/p>\n

                                            int<\/span> fd =<\/span> open<\/span>(<\/span>"test.txt"<\/span>,<\/span> O_RDONLY)<\/span>;<\/span><\/p>\n

                                            \u2003\u2003\u5047\u8bbe\u8fd4\u56de\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u662f 3\u3002\u5f53\u6211\u4eec\u8c03\u7528 read(3, buffer, sizeof(buffer)) \u65f6，\u5185\u6838\u4f1a\u901a\u8fc7\u5f53\u524d\u8fdb\u7a0b\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u8868\u627e\u5230\u5bf9\u5e94\u7684\u6253\u5f00\u6587\u4ef6\u5bf9\u8c61，\u518d\u6267\u884c\u8bfb\u53d6\u64cd\u4f5c\u3002<\/p>\n

                                            \u2003\u2003\u56e0\u6b64，\u6587\u4ef6\u63cf\u8ff0\u7b26\u53ea\u662f\u4e00\u4e2a\u7f16\u53f7，\u5e76\u4e0d\u662f\u6587\u4ef6\u5185\u5bb9\u6216\u7ba1\u9053\u672c\u8eab\u3002<\/p>\n

                                            5.2 fork() \u540e，\u7236\u5b50\u8fdb\u7a0b\u5982\u4f55\u5171\u4eab\u7ba1\u9053？<\/h4>\n

                                            \u2003\u2003\u5047\u8bbe\u7236\u8fdb\u7a0b\u8c03\u7528 pipe(fds) \u540e\u5f97\u5230：<\/p>\n

                                            fds[0] = 3 \/\/ \u8bfb\u7aef
                                            \nfds[1] = 4 \/\/ \u5199\u7aef<\/p>\n

                                            \u2003\u2003\u8c03\u7528 fork() \u540e，\u5b50\u8fdb\u7a0b\u4f1a\u7ee7\u627f\u8fd9\u4e9b\u6587\u4ef6\u63cf\u8ff0\u7b26\u3002\u53ef\u4ee5\u7b80\u5316\u7406\u89e3\u4e3a：<\/p>\n

                                            \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

                                            \u2003\u2003\u8fd9\u91cc\u9700\u8981\u6ce8\u610f，\u7236\u5b50\u8fdb\u7a0b\u62e5\u6709\u5404\u81ea\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u8868，\u4f46\u76f8\u5e94\u7684\u63cf\u8ff0\u7b26\u5f15\u7528\u7740\u7ee7\u627f\u800c\u6765\u7684\u5e95\u5c42\u6253\u5f00\u5bf9\u8c61，\u6700\u7ec8\u8bbf\u95ee\u540c\u4e00\u4e2a\u5185\u6838\u7ba1\u9053\u3002<\/p>\n

                                            \u2003\u2003\u56e0\u6b64，\u5b50\u8fdb\u7a0b\u8c03\u7528 write() \u5199\u5165\u6570\u636e\u540e，\u7236\u8fdb\u7a0b\u5c31\u53ef\u4ee5\u901a\u8fc7 read() \u8bfb\u53d6\u6570\u636e\u3002<\/p>\n

                                            5.3 \u4e3a\u4ec0\u4e48\u5173\u95ed\u4e00\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26，\u4e0d\u4f1a\u5f71\u54cd\u53e6\u4e00\u4e2a\u8fdb\u7a0b？<\/h4>\n

                                            \u2003\u2003\u4f8b\u5982，\u7236\u8fdb\u7a0b\u6267\u884c：<\/p>\n

                                            close<\/span>(<\/span>fds[<\/span>1<\/span>]<\/span>)<\/span>;<\/span><\/p>\n

                                            \u2003\u2003\u5173\u95ed\u7684\u53ea\u662f\u7236\u8fdb\u7a0b\u81ea\u5df1\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26，\u4e0d\u4f1a\u81ea\u52a8\u5173\u95ed\u5b50\u8fdb\u7a0b\u5bf9\u5e94\u7684\u63cf\u8ff0\u7b26\u3002<\/p>\n

                                            \u2003\u2003\u5982\u679c\u5b50\u8fdb\u7a0b\u4ecd\u7136\u6301\u6709\u5199\u7aef，\u7ba1\u9053\u5c31\u4ecd\u7136\u5b58\u5728\u5199\u7aef\u5f15\u7528\u3002\u53ea\u6709\u6240\u6709\u5199\u7aef\u90fd\u5173\u95ed，\u5e76\u4e14\u7ba1\u9053\u4e2d\u6ca1\u6709\u5269\u4f59\u6570\u636e\u65f6，\u8bfb\u7aef\u7684 read() \u624d\u4f1a\u8fd4\u56de 0\u3002<\/p>\n

                                            \u2003\u2003\u56e0\u6b64，\u5224\u65ad\u7ba1\u9053\u662f\u5426\u8fd8\u6709\u5199\u5165\u65b9，\u4e0d\u80fd\u53ea\u770b\u67d0\u4e2a\u8fdb\u7a0b\u662f\u5426\u9000\u51fa，\u8fd8\u8981\u770b\u662f\u5426\u6709\u5176\u4ed6\u8fdb\u7a0b\u4fdd\u7559\u7740\u5199\u7aef\u3002<\/p>\n

                                            5.4 \u6587\u4ef6\u63cf\u8ff0\u7b26\u8868\u548c\u7ba1\u9053\u7f13\u51b2\u533a\u6709\u4ec0\u4e48\u533a\u522b？<\/h4>\n\n\u6982\u5ff5\u4f5c\u7528<\/tr>\n\n\n\n\n\n
                                            \u6587\u4ef6\u63cf\u8ff0\u7b26<\/td>\n\u5f53\u524d\u8fdb\u7a0b\u8bbf\u95ee\u5185\u6838\u5bf9\u8c61\u7684\u5165\u53e3\u7f16\u53f7<\/td>\n<\/tr>\n
                                            \u6587\u4ef6\u63cf\u8ff0\u7b26\u8868<\/td>\n\u8bb0\u5f55\u5f53\u524d\u8fdb\u7a0b\u6301\u6709\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26<\/td>\n<\/tr>\n
                                            \u7ba1\u9053\u5bf9\u8c61<\/td>\n\u7ba1\u7406\u7ba1\u9053\u7684\u8bfb\u5199\u72b6\u6001\u53ca\u76f8\u5173\u5185\u6838\u6570\u636e<\/td>\n<\/tr>\n
                                            \u7ba1\u9053\u7f13\u51b2\u533a<\/td>\n\u6682\u5b58\u5df2\u7ecf\u5199\u5165\u3001\u4f46\u5c1a\u672a\u8bfb\u53d6\u7684\u6570\u636e<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
                                            \n

                                            \u516d\u3001\u4ece\u5185\u6838\u7684\u89d2\u5ea6\u7406\u89e3\u7ba1\u9053<\/h3>\n

                                            6.1 \u7ba1\u9053\u4e2d\u7684\u6570\u636e\u5b58\u653e\u5728\u54ea\u91cc？<\/h4>\n

                                            \u2003\u2003\u5047\u8bbe\u5b50\u8fdb\u7a0b\u6267\u884c：<\/p>\n

                                            write<\/span>(<\/span>wfd,<\/span> "hello"<\/span>,<\/span> 5<\/span>)<\/span>;<\/span><\/p>\n

                                            \u2003\u2003\u8fd9 5 \u4e2a\u5b57\u8282\u4e0d\u4f1a\u76f4\u63a5\u5199\u8fdb\u7236\u8fdb\u7a0b\u7684\u666e\u901a\u53d8\u91cf，\u800c\u662f\u7531\u5185\u6838\u7ba1\u9053\u673a\u5236\u63a5\u6536，\u5e76\u6682\u5b58\u5728\u5185\u6838\u7ef4\u62a4\u7684\u7ba1\u9053\u7f13\u51b2\u533a\u4e2d\u3002<\/p>\n

                                            \u2003\u2003\u968f\u540e，\u7236\u8fdb\u7a0b\u6267\u884c：<\/p>\n

                                            read<\/span>(<\/span>rfd,<\/span> buffer,<\/span> sizeof<\/span>(<\/span>buffer)<\/span>)<\/span>;<\/span><\/p>\n

                                            \u2003\u2003\u5185\u6838\u518d\u5c06\u7ba1\u9053\u4e2d\u7684\u6570\u636e\u590d\u5236\u5230\u7236\u8fdb\u7a0b\u63d0\u4f9b\u7684\u7f13\u51b2\u533a\u3002<\/p>\n

                                            \u2003\u2003\u6574\u4e2a\u8fc7\u7a0b\u53ef\u4ee5\u6982\u62ec\u4e3a：<\/p>\n

                                            \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

                                            \u2003\u2003\u7236\u5b50\u8fdb\u7a0b\u62e5\u6709\u5404\u81ea\u72ec\u7acb\u7684\u865a\u62df\u5730\u5740\u7a7a\u95f4，\u4f46\u53ef\u4ee5\u901a\u8fc7\u7cfb\u7edf\u8c03\u7528，\u8ba9\u5185\u6838\u5e2e\u52a9\u5b83\u4eec\u4f20\u9012\u6570\u636e\u3002<\/p>\n

                                            \u2003\u2003\u7ba1\u9053\u901a\u4fe1\u7684\u5173\u952e，\u662f\u4e0d\u540c\u8fdb\u7a0b\u901a\u8fc7\u5185\u6838\u63d0\u4f9b\u7684\u5171\u540c\u901a\u4fe1\u5bf9\u8c61\u4ea4\u6362\u6570\u636e，\u800c\u4e0d\u662f\u76f4\u63a5\u8bbf\u95ee\u5bf9\u65b9\u7684\u666e\u901a\u5185\u5b58\u3002<\/p>\n

                                            \n

                                            \u4e03\u3001\u7ba1\u9053\u7684\u8bfb\u5199\u89c4\u5219<\/h3>\n

                                            7.1 \u7ba1\u9053\u4e3a\u7a7a\u65f6，read() \u4f1a\u600e\u6837？<\/h4>\n

                                            \u2003\u2003\u9ed8\u8ba4\u60c5\u51b5\u4e0b，\u5982\u679c\u7ba1\u9053\u4e2d\u6ca1\u6709\u6570\u636e，\u4f46\u4ecd\u6709\u5199\u7aef\u6253\u5f00，\u963b\u585e\u6a21\u5f0f\u4e0b\u7684 read() \u4f1a\u7b49\u5f85\u6570\u636e\u5230\u6765\u3002<\/p>\n

                                            \u2003\u2003\u5982\u679c\u5c06\u8bfb\u7aef\u8bbe\u7f6e\u4e3a\u975e\u963b\u585e\u6a21\u5f0f，\u90a3\u4e48\u5728\u5f53\u524d\u6ca1\u6709\u6570\u636e\u53ef\u8bfb\u65f6，read() \u901a\u5e38\u8fd4\u56de -1，\u5e76\u5c06 errno \u8bbe\u7f6e\u4e3a EAGAIN \u6216 EWOULDBLOCK\u3002<\/p>\n

                                            \u2003\u2003\u4f46\u662f，\u5982\u679c\u6240\u6709\u5199\u7aef\u5df2\u7ecf\u5173\u95ed，\u5e76\u4e14\u7ba1\u9053\u4e2d\u7684\u6570\u636e\u4e5f\u5df2\u7ecf\u8bfb\u5b8c，\u90a3\u4e48 read() \u4f1a\u8fd4\u56de 0，\u8868\u793a EOF\u3002<\/p>\n

                                            7.2 \u7ba1\u9053\u5199\u6ee1\u65f6，write() \u4f1a\u600e\u6837？<\/h4>\n

                                            \u2003\u2003\u7ba1\u9053\u7f13\u51b2\u533a\u5bb9\u91cf\u6709\u9650\u3002\u5982\u679c\u5199\u5165\u65b9\u4e0d\u65ad\u5199\u5165\u6570\u636e，\u5374\u6ca1\u6709\u8fdb\u7a0b\u8bfb\u53d6，\u7f13\u51b2\u533a\u5c31\u53ef\u80fd\u88ab\u5199\u6ee1\u3002<\/p>\n

                                              \n
                                            • \u963b\u585e\u6a21\u5f0f： \u7a7a\u95f4\u4e0d\u8db3\u65f6，write() \u53ef\u80fd\u7b49\u5f85，\u76f4\u5230\u8bfb\u7aef\u91ca\u653e\u7a7a\u95f4\u3002<\/li>\n
                                            • \u975e\u963b\u585e\u6a21\u5f0f： \u5982\u679c\u5f53\u524d\u65e0\u6cd5\u5199\u5165，write() \u901a\u5e38\u8fd4\u56de -1，\u5e76\u8bbe\u7f6e errno \u4e3a EAGAIN \u6216 EWOULDBLOCK\u3002<\/li>\n<\/ul>\n

                                              \u2003\u2003\u5bf9\u4e8e\u8f83\u5927\u7684\u5199\u5165\u8bf7\u6c42，\u8fd8\u53ef\u80fd\u51fa\u73b0\u53ea\u5199\u5165\u90e8\u5206\u6570\u636e\u7684\u60c5\u51b5，\u56e0\u6b64\u5b9e\u9645\u7f16\u7a0b\u65f6\u9700\u8981\u68c0\u67e5\u8fd4\u56de\u503c\u3002<\/p>\n

                                              7.3 \u6240\u6709\u5199\u7aef\u5173\u95ed\u540e，\u4e3a\u4ec0\u4e48 read() \u4f1a\u8fd4\u56de 0？<\/h4>\n

                                              \u2003\u2003\u5047\u8bbe\u5b50\u8fdb\u7a0b\u6267\u884c：<\/p>\n

                                              write<\/span>(<\/span>wfd,<\/span> "hello"<\/span>,<\/span> 5<\/span>)<\/span>;<\/span>
                                              \nclose<\/span>(<\/span>wfd)<\/span>;<\/span><\/p>\n

                                              \u2003\u2003\u5982\u679c\u7236\u8fdb\u7a0b\u8bfb\u53d6\u65f6，\u7ba1\u9053\u4e2d\u4ecd\u7136\u6709\u6570\u636e，\u5c31\u4f1a\u5148\u8bfb\u53d6\u8fd9\u4e9b\u6570\u636e\u3002\u7b49\u6570\u636e\u5168\u90e8\u8bfb\u5b8c，\u5e76\u4e14\u6240\u6709\u5199\u7aef\u90fd\u5173\u95ed\u540e，\u540e\u7eed\u7684 read() \u624d\u4f1a\u8fd4\u56de 0\u3002<\/p>\n

                                              \u2003\u2003\u56e0\u6b64，EOF \u5e76\u4e0d\u610f\u5473\u7740\u67d0\u4e2a\u5b50\u8fdb\u7a0b\u521a\u521a\u9000\u51fa，\u800c\u662f\u8868\u793a\u7ba1\u9053\u4e2d\u7684\u6570\u636e\u5df2\u7ecf\u8bfb\u5b8c，\u4e14\u4e0d\u518d\u6709\u4efb\u4f55\u5199\u7aef\u80fd\u591f\u5199\u5165\u6570\u636e\u3002<\/p>\n

                                              \u2003\u2003\u5982\u679c\u5176\u4ed6\u8fdb\u7a0b\u4ecd\u7136\u6301\u6709\u5199\u7aef，\u5373\u4f7f\u6700\u521d\u5199\u5165\u6570\u636e\u7684\u5b50\u8fdb\u7a0b\u5df2\u7ecf\u9000\u51fa，\u7236\u8fdb\u7a0b\u4e5f\u53ef\u80fd\u7ee7\u7eed\u7b49\u5f85\u3002<\/p>\n

                                              \n

                                              \u516b\u3001\u7ba1\u9053\u7684\u4e3b\u8981\u7279\u70b9<\/h3>\n

                                              8.1 \u533f\u540d\u7ba1\u9053\u901a\u5e38\u7528\u4e8e\u76f8\u5173\u8fdb\u7a0b\u4e4b\u95f4\u901a\u4fe1<\/h4>\n

                                              \u2003\u2003\u533f\u540d\u7ba1\u9053\u6ca1\u6709\u53ef\u4ee5\u8ba9\u4efb\u610f\u8fdb\u7a0b\u76f4\u63a5\u901a\u8fc7\u6587\u4ef6\u7cfb\u7edf\u8def\u5f84\u6253\u5f00\u7684\u540d\u79f0，\u56e0\u6b64\u6700\u5e38\u89c1\u7684\u65b9\u5f0f\u662f\u7531\u7236\u8fdb\u7a0b\u521b\u5efa\u7ba1\u9053，\u518d\u901a\u8fc7 fork() \u8ba9\u5b50\u8fdb\u7a0b\u7ee7\u627f\u6587\u4ef6\u63cf\u8ff0\u7b26\u3002<\/p>\n

                                              \u2003\u2003\u4e0d\u8fc7，\u5982\u679c\u6587\u4ef6\u63cf\u8ff0\u7b26\u901a\u8fc7\u5176\u4ed6\u65b9\u5f0f\u4f20\u9012\u7ed9\u65e0\u4eb2\u7f18\u5173\u7cfb\u7684\u8fdb\u7a0b，\u533f\u540d\u7ba1\u9053\u4e5f\u53ef\u4ee5\u7528\u4e8e\u5b83\u4eec\u4e4b\u95f4\u7684\u901a\u4fe1\u3002<\/p>\n

                                              8.2 \u7ba1\u9053\u63d0\u4f9b\u5b57\u8282\u6d41\u670d\u52a1<\/h4>\n

                                              \u2003\u2003\u7ba1\u9053\u53ea\u8d1f\u8d23\u4f20\u9012\u5b57\u8282，\u4e0d\u4f1a\u81ea\u52a8\u533a\u5206\u6bcf\u6b21 write() \u5bf9\u5e94\u54ea\u6b21 read()\u3002\u5982\u679c\u9700\u8981\u4f20\u9012\u4e00\u6761\u6761\u5b8c\u6574\u6d88\u606f，\u901a\u4fe1\u53cc\u65b9\u5fc5\u987b\u7ea6\u5b9a\u6570\u636e\u683c\u5f0f\u3002<\/p>\n

                                              8.3 \u7ba1\u9053\u7684\u751f\u547d\u5468\u671f\u4e0e\u5f15\u7528\u6709\u5173<\/h4>\n

                                              \u2003\u2003\u67d0\u4e2a\u8fdb\u7a0b\u9000\u51fa，\u5e76\u4e0d\u610f\u5473\u7740\u7ba1\u9053\u4e00\u5b9a\u7acb\u5373\u91ca\u653e\u3002\u53ea\u8981\u4ecd\u6709\u76f8\u5173\u6587\u4ef6\u63cf\u8ff0\u7b26\u4fdd\u6301\u6253\u5f00，\u7ba1\u9053\u5bf9\u8c61\u5c31\u53ef\u80fd\u7ee7\u7eed\u5b58\u5728\u3002\u76f8\u5173\u5f15\u7528\u5168\u90e8\u91ca\u653e\u540e，\u5185\u6838\u624d\u80fd\u56de\u6536\u76f8\u5e94\u8d44\u6e90\u3002<\/p>\n

                                              8.4 \u7ba1\u9053\u7531\u5185\u6838\u534f\u8c03\u8bfb\u5199<\/h4>\n

                                              \u2003\u2003\u5185\u6838\u8d1f\u8d23\u7ba1\u7406\u7ba1\u9053\u7f13\u51b2\u533a，\u5e76\u6839\u636e\u8bfb\u5199\u72b6\u6001\u5904\u7406\u963b\u585e\u548c\u5524\u9192\u7b49\u64cd\u4f5c\u3002\u4f46\u7ba1\u9053\u5e76\u4e0d\u80fd\u81ea\u52a8\u89e3\u51b3\u6240\u6709\u4e1a\u52a1\u5c42\u9762\u7684\u540c\u6b65\u95ee\u9898，\u590d\u6742\u573a\u666f\u4ecd\u7136\u53ef\u80fd\u9700\u8981\u989d\u5916\u7684\u540c\u6b65\u673a\u5236\u3002<\/p>\n

                                              \n

                                              \u4e5d\u3001\u7528\u56db\u79cd\u5178\u578b\u60c5\u51b5\u9a8c\u8bc1\u7ba1\u9053\u89c4\u5219<\/h3>\n

                                              \u2003\u2003\u7406\u8bba\u8bb2\u5b8c\u4e4b\u540e，\u6211\u4eec\u53ef\u4ee5\u56de\u5230\u5b9e\u9645\u4ee3\u7801\u4e2d，\u9a8c\u8bc1\u524d\u9762\u7684\u89c4\u5219\u3002<\/p>\n

                                              \u2003\u2003\u8fd9\u91cc\u91cd\u70b9\u8003\u8651\u56db\u79cd\u60c5\u51b5：<\/p>\n

                                            • \u8bfb\u7aef\u6b63\u5e38，\u5199\u7aef\u6b63\u5e38\u3002<\/li>\n
                                            • \u5199\u7aef\u6b63\u5e38，\u4f46\u8bfb\u7aef\u6682\u65f6\u6ca1\u6709\u6570\u636e\u3002<\/li>\n
                                            • \u5199\u7aef\u5173\u95ed，\u8bfb\u7aef\u7ee7\u7eed\u8bfb\u53d6\u3002<\/li>\n
                                            • \u8bfb\u7aef\u5173\u95ed，\u5199\u7aef\u7ee7\u7eed\u5199\u5165\u3002<\/li>\n

                                              9.1 \u60c5\u51b5\u4e00：\u8bfb\u7aef\u6b63\u5e38，\u5199\u7aef\u6b63\u5e38<\/h4>\n

                                              \u2003\u2003\u8fd9\u662f\u6700\u666e\u901a\u7684\u60c5\u51b5\u3002<\/p>\n

                                              \u2003\u2003\u5199\u7aef\u6267\u884c：<\/p>\n

                                              write<\/span>(<\/span>wfd,<\/span> "hello"<\/span>,<\/span> 5<\/span>)<\/span>;<\/span><\/p>\n

                                              \u2003\u2003\u8bfb\u7aef\u6267\u884c：<\/p>\n

                                              char<\/span> buffer[<\/span>100<\/span>]<\/span>;<\/span><\/p>\n

                                              ssize_t n =<\/span> read<\/span>(<\/span>rfd,<\/span> buffer,<\/span> sizeof<\/span>(<\/span>buffer)<\/span>)<\/span>;<\/span><\/p>\n

                                              \u2003\u2003\u53ea\u8981\u6570\u636e\u6210\u529f\u5199\u5165，\u8bfb\u7aef\u5c31\u53ef\u4ee5\u8bfb\u53d6\u76f8\u5e94\u7684\u6570\u636e\u3002<\/p>\n

                                              \u2003\u2003\u4e0d\u8fc7，\u5982\u679c\u5199\u7aef\u6682\u65f6\u6ca1\u6709\u6570\u636e\u53ef\u5199，\u800c\u8bfb\u7aef\u4f7f\u7528\u963b\u585e\u6a21\u5f0f\u8c03\u7528 read()，\u8bfb\u7aef\u5c31\u53ef\u80fd\u7b49\u5f85\u3002<\/p>\n

                                              \u2003\u2003\u56e0\u6b64，\u6b63\u5e38\u901a\u4fe1\u4e0d\u4ec5\u8981\u6c42\u7ba1\u9053\u5b58\u5728，\u8fd8\u9700\u8981\u5199\u5165\u65b9\u548c\u8bfb\u53d6\u65b9\u6309\u7167\u5408\u7406\u7684\u6d41\u7a0b\u534f\u4f5c\u3002<\/p>\n

                                              9.2 \u60c5\u51b5\u4e8c：\u5199\u7aef\u6b63\u5e38，\u4f46\u7ba1\u9053\u4e3a\u7a7a<\/h4>\n

                                              \u2003\u2003\u5047\u8bbe\u5199\u7aef\u4ecd\u7136\u6253\u5f00，\u4f46\u662f\u6682\u65f6\u6ca1\u6709\u5411\u7ba1\u9053\u5199\u5165\u6570\u636e\u3002<\/p>\n

                                              \u2003\u2003\u6b64\u65f6\u8bfb\u7aef\u8c03\u7528：<\/p>\n

                                              read<\/span>(<\/span>rfd,<\/span> buffer,<\/span> sizeof<\/span>(<\/span>buffer)<\/span>)<\/span>;<\/span><\/p>\n

                                              \u2003\u2003\u5982\u679c\u662f\u963b\u585e\u6a21\u5f0f，\u8bfb\u53d6\u64cd\u4f5c\u4f1a\u7b49\u5f85\u3002<\/p>\n

                                              \u2003\u2003\u5982\u679c\u662f\u975e\u963b\u585e\u6a21\u5f0f，\u5219\u901a\u5e38\u8fd4\u56de -1，\u5e76\u5c06 errno \u8bbe\u7f6e\u4e3a EAGAIN \u6216 EWOULDBLOCK\u3002<\/p>\n

                                              \u2003\u2003\u8fd9\u8bf4\u660e\u7ba1\u9053\u4e3a\u7a7a\u548c\u7ba1\u9053\u5df2\u7ecf\u7ed3\u675f\u662f\u4e24\u79cd\u4e0d\u540c\u72b6\u6001\u3002<\/p>\n

                                                \n
                                              • \u7ba1\u9053\u4e3a\u7a7a，\u4f46\u4ecd\u6709\u5199\u7aef：\u540e\u9762\u8fd8\u53ef\u80fd\u6709\u6570\u636e\u3002<\/li>\n
                                              • \u7ba1\u9053\u4e3a\u7a7a，\u6240\u6709\u5199\u7aef\u5173\u95ed：\u5df2\u7ecf\u5230\u8fbe EOF\u3002<\/li>\n<\/ul>\n

                                                9.3 \u60c5\u51b5\u4e09：\u5199\u7aef\u5173\u95ed，\u8bfb\u7aef\u6b63\u5e38<\/h4>\n

                                                \u2003\u2003\u5047\u8bbe\u5199\u7aef\u5148\u5199\u5165：<\/p>\n

                                                write<\/span>(<\/span>wfd,<\/span> "hello"<\/span>,<\/span> 5<\/span>)<\/span>;<\/span><\/p>\n

                                                \u2003\u2003\u7136\u540e\u6267\u884c：<\/p>\n

                                                close<\/span>(<\/span>wfd)<\/span>;<\/span><\/p>\n

                                                \u2003\u2003\u8bfb\u7aef\u7b2c\u4e00\u6b21\u8bfb\u53d6\u65f6，\u4ecd\u7136\u53ef\u80fd\u5f97\u5230：<\/p>\n

                                                hello<\/p>\n

                                                \u2003\u2003\u6570\u636e\u88ab\u8bfb\u5b8c\u540e，\u8bfb\u7aef\u518d\u6b21\u8bfb\u53d6，\u5c31\u4f1a\u5f97\u5230：<\/p>\n

                                                read<\/span>(<\/span>rfd,<\/span> buffer,<\/span> sizeof<\/span>(<\/span>buffer)<\/span>)<\/span> ==<\/span> 0<\/span><\/p>\n

                                                \u2003\u2003\u8fd9\u5c31\u662f EOF\u3002<\/p>\n

                                                \u2003\u2003\u6240\u4ee5，\u5199\u7aef\u5173\u95ed\u4e0d\u610f\u5473\u7740\u5df2\u7ecf\u5199\u5165\u7684\u6570\u636e\u4f1a\u88ab\u76f4\u63a5\u4e22\u5f03\u3002<\/p>\n

                                                \u2003\u2003\u8bfb\u7aef\u4ecd\u7136\u53ef\u4ee5\u628a\u7f13\u51b2\u533a\u4e2d\u7684\u5269\u4f59\u6570\u636e\u8bfb\u53d6\u5b8c\u6bd5\u3002<\/p>\n

                                                9.4 \u60c5\u51b5\u56db：\u8bfb\u7aef\u5173\u95ed，\u5199\u7aef\u6b63\u5e38<\/h4>\n

                                                \u2003\u2003\u5047\u8bbe\u6240\u6709\u8bfb\u7aef\u90fd\u5173\u95ed\u4e86，\u4f46\u5199\u7aef\u4ecd\u7136\u5c1d\u8bd5\u5199\u5165：<\/p>\n

                                                write<\/span>(<\/span>wfd,<\/span> "hello"<\/span>,<\/span> 5<\/span>)<\/span>;<\/span><\/p>\n

                                                \u2003\u2003\u6b64\u65f6\u4f1a\u4ea7\u751f SIGPIPE \u4fe1\u53f7\u3002<\/p>\n

                                                \u2003\u2003\u5982\u679c\u91c7\u7528\u9ed8\u8ba4\u5904\u7406\u65b9\u5f0f，\u8fdb\u7a0b\u901a\u5e38\u4f1a\u7ec8\u6b62\u3002<\/p>\n

                                                \u2003\u2003\u5982\u679c\u7a0b\u5e8f\u5ffd\u7565\u6216\u5904\u7406\u4e86 SIGPIPE，\u5c31\u53ef\u4ee5\u901a\u8fc7 write() \u7684\u8fd4\u56de\u503c\u68c0\u67e5\u9519\u8bef\u3002\u5e38\u89c1\u7ed3\u679c\u662f\u8fd4\u56de -1，\u5e76\u8bbe\u7f6e errno \u4e3a EPIPE\u3002<\/p>\n

                                                \u2003\u2003\u56e0\u6b64，\u5199\u7aef\u5728\u8bbe\u8ba1\u65f6\u4e0d\u80fd\u5047\u8bbe\u8bfb\u7aef\u6c38\u8fdc\u5b58\u5728\u3002<\/p>\n

                                                \u2003\u2003\u5982\u679c\u8bfb\u7aef\u53ef\u80fd\u63d0\u524d\u9000\u51fa，\u5199\u7aef\u5c31\u5e94\u8be5\u8003\u8651\u5982\u4f55\u5904\u7406\u8fd9\u79cd\u60c5\u51b5，\u4f8b\u5982\u8bb0\u5f55\u9519\u8bef\u3001\u505c\u6b62\u53d1\u9001\u6570\u636e\u3001\u6e05\u7406\u8d44\u6e90\u7b49\u3002<\/p>\n

                                                \n

                                                \u5341\u3001\u4ece\u7ba1\u9053\u5230\u8fdb\u7a0b\u6c60：\u4e3a\u4ec0\u4e48\u9700\u8981\u591a\u4e2a\u5b50\u8fdb\u7a0b？<\/h3>\n

                                                \u2003\u2003\u524d\u9762\u6211\u4eec\u5df2\u7ecf\u5b66\u4f1a\u4e86\u4f7f\u7528\u7ba1\u9053\u8fdb\u884c\u7236\u5b50\u8fdb\u7a0b\u901a\u4fe1\u3002\u4f46\u5982\u679c\u7a0b\u5e8f\u9700\u8981\u6267\u884c\u5927\u91cf\u4efb\u52a1，\u4f8b\u5982\u6253\u5370\u65e5\u5fd7\u3001\u4e0b\u8f7d\u6587\u4ef6\u3001\u4e0a\u4f20\u6570\u636e，\u53ea\u4f9d\u9760\u4e00\u4e2a\u8fdb\u7a0b\u5904\u7406，\u5c31\u53ef\u80fd\u65e0\u6cd5\u5145\u5206\u5229\u7528\u591a\u8fdb\u7a0b\u5e76\u53d1\u6267\u884c\u7684\u80fd\u529b\u3002<\/p>\n

                                                \u2003\u2003\u8fd9\u65f6，\u53ef\u4ee5\u521b\u5efa\u591a\u4e2a\u5b50\u8fdb\u7a0b，\u8ba9\u7236\u8fdb\u7a0b\u8d1f\u8d23\u6d3e\u53d1\u4efb\u52a1，\u5b50\u8fdb\u7a0b\u8d1f\u8d23\u6267\u884c\u4efb\u52a1\u3002\u8fd9\u5c31\u662f\u8fdb\u7a0b\u6c60\u7684\u57fa\u672c\u601d\u60f3\u3002<\/p>\n

                                                10.1 \u4ec0\u4e48\u662f\u8fdb\u7a0b\u6c60？<\/h4>\n

                                                \u2003\u2003\u8fdb\u7a0b\u6c60\u5c31\u662f\u63d0\u524d\u521b\u5efa\u4e00\u7ec4\u5de5\u4f5c\u8fdb\u7a0b，\u5e76\u8ba9\u5b83\u4eec\u53cd\u590d\u6267\u884c\u4efb\u52a1\u3002<\/p>\n

                                                \u2003\u2003\u5b83\u4e3b\u8981\u5305\u542b\u4e09\u4e2a\u90e8\u5206：<\/p>\n

                                                  \n
                                                • \u7236\u8fdb\u7a0b： \u7ba1\u7406\u5b50\u8fdb\u7a0b，\u8d1f\u8d23\u6d3e\u53d1\u4efb\u52a1\u3002<\/li>\n
                                                • \u5b50\u8fdb\u7a0b： \u63a5\u6536\u4efb\u52a1\u5e76\u6267\u884c\u3002<\/li>\n
                                                • \u901a\u4fe1\u901a\u9053： \u8d1f\u8d23\u5728\u7236\u5b50\u8fdb\u7a0b\u4e4b\u95f4\u4f20\u9012\u4efb\u52a1\u4fe1\u606f\u3002<\/li>\n<\/ul>\n

                                                  \u2003\u2003\u4e3a\u4ec0\u4e48\u4e0d\u6bcf\u6b21\u6709\u4efb\u52a1\u65f6\u624d\u521b\u5efa\u5b50\u8fdb\u7a0b？<\/p>\n

                                                  \u2003\u2003\u56e0\u4e3a\u521b\u5efa\u548c\u9500\u6bc1\u8fdb\u7a0b\u9700\u8981\u4e00\u5b9a\u7684\u7cfb\u7edf\u5f00\u9500\u3002\u5bf9\u4e8e\u4efb\u52a1\u8f83\u591a\u7684\u573a\u666f，\u63d0\u524d\u521b\u5efa\u5e76\u590d\u7528\u5de5\u4f5c\u8fdb\u7a0b，\u53ef\u4ee5\u51cf\u5c11\u91cd\u590d\u521b\u5efa\u8fdb\u7a0b\u7684\u6210\u672c\u3002<\/p>\n

                                                  10.2 \u4e3a\u4ec0\u4e48\u8fdb\u7a0b\u6c60\u9700\u8981\u7ba1\u9053？<\/h4>\n

                                                  \u2003\u2003\u5047\u8bbe\u7236\u8fdb\u7a0b\u521b\u5efa\u4e86 3 \u4e2a\u5b50\u8fdb\u7a0b：<\/p>\n

                                                  \u7236\u8fdb\u7a0b
                                                  \n \/ | \\\\
                                                  \n \u7ba1\u90531 \u7ba1\u90532 \u7ba1\u90533
                                                  \n | | |
                                                  \n \u5b50\u8fdb\u7a0b1 \u5b50\u8fdb\u7a0b2 \u5b50\u8fdb\u7a0b3<\/p>\n

                                                  \u2003\u2003\u7236\u8fdb\u7a0b\u751f\u6210\u4e00\u4e2a\u4efb\u52a1\u7f16\u53f7，\u4f8b\u5982 1，\u5c31\u53ef\u4ee5\u901a\u8fc7\u5bf9\u5e94\u7ba1\u9053\u5c06\u7f16\u53f7\u53d1\u9001\u7ed9\u5b50\u8fdb\u7a0b\u3002<\/p>\n

                                                  \u2003\u2003\u5b50\u8fdb\u7a0b\u8bfb\u53d6\u7f16\u53f7\u540e，\u518d\u6267\u884c\u76f8\u5e94\u4efb\u52a1\u3002<\/p>\n

                                                  \u2003\u2003\u8fd9\u91cc\u53d1\u9001\u7684\u662f\u4efb\u52a1\u7f16\u53f7，\u800c\u4e0d\u662f\u6574\u4e2a\u4efb\u52a1\u51fd\u6570\u3002\u7236\u5b50\u8fdb\u7a0b\u901a\u8fc7\u7ea6\u5b9a\u597d\u7684\u7f16\u53f7\u5bf9\u5e94\u5173\u7cfb，\u5c31\u80fd\u77e5\u9053\u5e94\u8be5\u6267\u884c\u4ec0\u4e48\u4efb\u52a1\u3002<\/p>\n

                                                  \u2003\u2003\u4e3a\u6bcf\u4e2a\u5b50\u8fdb\u7a0b\u5efa\u7acb\u72ec\u7acb\u7ba1\u9053，\u4e5f\u65b9\u4fbf\u7236\u8fdb\u7a0b\u660e\u786e\u6307\u5b9a\u4efb\u52a1\u7684\u63a5\u6536\u8005\u3002<\/p>\n

                                                  \n

                                                  \u5341\u4e00\u3001\u4efb\u52a1\u7ba1\u7406\u5668：\u5982\u4f55\u6839\u636e\u7f16\u53f7\u6267\u884c\u4efb\u52a1？<\/h3>\n

                                                  \u2003\u2003\u8fdb\u7a0b\u6c60\u53ef\u4ee5\u5c06\u4efb\u52a1\u51fd\u6570\u7edf\u4e00\u4fdd\u5b58\u8d77\u6765，\u901a\u8fc7\u7f16\u53f7\u51b3\u5b9a\u6267\u884c\u54ea\u4e2a\u4efb\u52a1\u3002<\/p>\n

                                                  Task.hpp\u6587\u4ef6<\/p>\n

                                                  #<\/span>pragma<\/span> once<\/span><\/span><\/p>\n

                                                  #<\/span>include<\/span><iostream><\/span><\/span>
                                                  \n#<\/span>include<\/span><vector><\/span><\/span>
                                                  \n#<\/span>include<\/span><ctime><\/span><\/span><\/p>\n

                                                  typedef<\/span> void<\/span> (<\/span>*<\/span>task_t)<\/span>(<\/span>)<\/span>;<\/span><\/p>\n

                                                  void<\/span> PrintLog<\/span>(<\/span>)<\/span>
                                                  \n{<\/span>
                                                  \n std::<\/span>cout <<<\/span> "\u6211\u662f\u4e00\u4e2a\u6253\u5370\u7684\u4efb\u52a1…"<\/span> <<<\/span> std::<\/span>endl;<\/span>
                                                  \n}<\/span><\/p>\n

                                                  void<\/span> DownLoad<\/span>(<\/span>)<\/span>
                                                  \n{<\/span>
                                                  \n std::<\/span>cout <<<\/span> "\u6211\u662f\u4e00\u4e2a\u4e0b\u8f7d\u7684\u4efb\u52a1…"<\/span> <<<\/span> std::<\/span>endl;<\/span>
                                                  \n}<\/span><\/p>\n

                                                  void<\/span> UpLoad<\/span>(<\/span>)<\/span>
                                                  \n{<\/span>
                                                  \n std::<\/span>cout <<<\/span> "\u6211\u662f\u4e00\u4e2a\u4e0a\u4f20\u7684\u4efb\u52a1…"<\/span> <<<\/span> std::<\/span>endl;<\/span>
                                                  \n}<\/span><\/p>\n

                                                  class<\/span> TaskManager<\/span>
                                                  \n{<\/span>
                                                  \npublic<\/span>:<\/span>
                                                  \n TaskManager<\/span>(<\/span>)<\/span>
                                                  \n {<\/span>
                                                  \n srand<\/span>(<\/span>time<\/span>(<\/span>nullptr<\/span>)<\/span>)<\/span>;<\/span>
                                                  \n }<\/span><\/p>\n

                                                  void<\/span> Register<\/span>(<\/span>task_t t)<\/span>
                                                  \n {<\/span>
                                                  \n _task.<\/span>push_back<\/span>(<\/span>t)<\/span>;<\/span>
                                                  \n }<\/span><\/p>\n

                                                  int<\/span> Code<\/span>(<\/span>)<\/span>
                                                  \n {<\/span>
                                                  \n if<\/span>(<\/span>_task.<\/span>empty<\/span>(<\/span>)<\/span>)<\/span>
                                                  \n return<\/span> –<\/span>1<\/span>;<\/span><\/p>\n

                                                  return<\/span> rand<\/span>(<\/span>)<\/span> %<\/span> _task.<\/span>size<\/span>(<\/span>)<\/span>;<\/span>
                                                  \n }<\/span><\/p>\n

                                                  void<\/span> Execute<\/span>(<\/span>int<\/span> code)<\/span>
                                                  \n {<\/span>
                                                  \n if<\/span>(<\/span>code >=<\/span> 0<\/span> &&<\/span> code <<\/span> _task.<\/span>size<\/span>(<\/span>)<\/span>)<\/span>
                                                  \n {<\/span>
                                                  \n _task[<\/span>code]<\/span>(<\/span>)<\/span>;<\/span>
                                                  \n }<\/span>
                                                  \n }<\/span><\/p>\n

                                                  private<\/span>:<\/span>
                                                  \n std::<\/span>vector<<\/span>task_t><\/span> _task;<\/span>
                                                  \n}<\/span>;<\/span><\/p>\n

                                                  \u2003\u2003\u8fd9\u91cc\u6700\u91cd\u8981\u7684\u662f\u4e09\u4e2a\u51fd\u6570：<\/p>\n

                                                    \n
                                                  • Register()：\u5c06\u4efb\u52a1\u51fd\u6570\u4fdd\u5b58\u5230 vector \u4e2d\u3002<\/li>\n
                                                  • Code()：\u968f\u673a\u751f\u6210\u4e00\u4e2a\u6709\u6548\u7684\u4efb\u52a1\u7f16\u53f7\u3002<\/li>\n
                                                  • Execute()：\u6839\u636e\u7f16\u53f7\u8c03\u7528\u5bf9\u5e94\u7684\u51fd\u6570\u3002<\/li>\n<\/ul>\n

                                                    \u2003\u2003\u4f8b\u5982，\u6ce8\u518c\u4e09\u4e2a\u4efb\u52a1\u540e，\u53ef\u4ee5\u5efa\u7acb\u8fd9\u6837\u7684\u5bf9\u5e94\u5173\u7cfb：<\/p>\n

                                                    \u7f16\u53f7 0 \u2192 PrintLog
                                                    \n\u7f16\u53f7 1 \u2192 DownLoad
                                                    \n\u7f16\u53f7 2 \u2192 UpLoad<\/p>\n

                                                    \u2003\u2003\u7236\u8fdb\u7a0b\u53ea\u9700\u8981\u5411\u5b50\u8fdb\u7a0b\u53d1\u9001\u7f16\u53f7 1，\u5b50\u8fdb\u7a0b\u5c31\u80fd\u6267\u884c DownLoad()\u3002<\/p>\n

                                                    \u2003\u2003\u4e3a\u4ec0\u4e48\u5b50\u8fdb\u7a0b\u4e5f\u80fd\u6267\u884c\u8fd9\u4e9b\u51fd\u6570？\u56e0\u4e3a fork() \u540e，\u5b50\u8fdb\u7a0b\u4f1a\u7ee7\u627f\u7236\u8fdb\u7a0b\u5f53\u65f6\u7684\u8fdb\u7a0b\u5185\u5b58\u72b6\u6001，\u5176\u4e2d\u5305\u62ec\u5df2\u7ecf\u6ce8\u518c\u7684\u4efb\u52a1\u5217\u8868\u3002\u4f46\u7236\u5b50\u8fdb\u7a0b\u7684\u666e\u901a\u5185\u5b58\u662f\u76f8\u4e92\u72ec\u7acb\u7684，\u540e\u7eed\u4fee\u6539\u4e0d\u4f1a\u81ea\u52a8\u540c\u6b65\u3002<\/p>\n

                                                    \n

                                                    \u5341\u4e8c\u3001Channel：\u7ba1\u7406\u7236\u8fdb\u7a0b\u4e0e\u5b50\u8fdb\u7a0b\u7684\u901a\u4fe1<\/h3>\n

                                                    \u2003\u2003\u6bcf\u4e2a\u5b50\u8fdb\u7a0b\u90fd\u5bf9\u5e94\u4e00\u4e2a\u901a\u4fe1\u901a\u9053\u3002\u7236\u8fdb\u7a0b\u9700\u8981\u8bb0\u5f55\u7ba1\u9053\u5199\u7aef\u548c\u5b50\u8fdb\u7a0b PID，\u56e0\u6b64\u53ef\u4ee5\u4f7f\u7528 Channel \u7c7b\u7edf\u4e00\u7ba1\u7406\u3002<\/p>\n

                                                    class<\/span> Channel<\/span>
                                                    \n{<\/span>
                                                    \npublic<\/span>:<\/span>
                                                    \n Channel<\/span>(<\/span>int<\/span> fd,<\/span> pid_t id)<\/span>
                                                    \n :<\/span> _wfd<\/span>(<\/span>fd)<\/span>,<\/span> _subid<\/span>(<\/span>id)<\/span>
                                                    \n {<\/span>
                                                    \n _name =<\/span> "channel-"<\/span> +<\/span> std::<\/span>to_string<\/span>(<\/span>_wfd)<\/span> +<\/span> "-"<\/span> +<\/span> std::<\/span>to_string<\/span>(<\/span>_subid)<\/span>;<\/span>
                                                    \n }<\/span><\/p>\n

                                                    ~<\/span>Channel<\/span>(<\/span>)<\/span> =<\/span> default<\/span>;<\/span><\/p>\n

                                                    void<\/span> Send<\/span>(<\/span>int<\/span> code)<\/span>
                                                    \n {<\/span>
                                                    \n size_t n =<\/span> write<\/span>(<\/span>_wfd,<\/span> &<\/span>code,<\/span> sizeof<\/span>(<\/span>code)<\/span>)<\/span>;<\/span>
                                                    \n (<\/span>void<\/span>)<\/span>n;<\/span> \/\/ \u6682\u65f6\u4e0d\u4f7f\u7528\u53d8\u91cfn\u7684\u503c<\/span>
                                                    \n }<\/span><\/p>\n

                                                    void<\/span> Close<\/span>(<\/span>)<\/span>
                                                    \n {<\/span>
                                                    \n if<\/span> (<\/span>_wfd ><\/span> 0<\/span>)<\/span>
                                                    \n {<\/span>
                                                    \n close<\/span>(<\/span>_wfd)<\/span>;<\/span>
                                                    \n _wfd =<\/span> –<\/span>1<\/span>;<\/span>
                                                    \n }<\/span>
                                                    \n }<\/span><\/p>\n

                                                    void<\/span> Wait<\/span>(<\/span>)<\/span>
                                                    \n {<\/span>
                                                    \n pid_t rid =<\/span> waitpid<\/span>(<\/span>_subid,<\/span> nullptr<\/span>,<\/span> 0<\/span>)<\/span>;<\/span>
                                                    \n (<\/span>void<\/span>)<\/span>rid;<\/span>
                                                    \n }<\/span><\/p>\n

                                                    int<\/span> FD<\/span>(<\/span>)<\/span> const<\/span> {<\/span> return<\/span> _wfd;<\/span> }<\/span>
                                                    \n pid_t SubId<\/span>(<\/span>)<\/span> const<\/span> {<\/span> return<\/span> _subid;<\/span> }<\/span>
                                                    \n const<\/span> std::<\/span>string &<\/span>Name<\/span>(<\/span>)<\/span> const<\/span> {<\/span> return<\/span> _name;<\/span> }<\/span><\/p>\n

                                                    private<\/span>:<\/span>
                                                    \n int<\/span> _wfd;<\/span>
                                                    \n pid_t _subid;<\/span>
                                                    \n std::<\/span>string _name;<\/span>
                                                    \n}<\/span>;<\/span><\/p>\n

                                                    \u8fd9\u91cc\u9700\u8981\u7406\u89e3\u4e09\u4e2a\u51fd\u6570：<\/p>\n

                                                      \n
                                                    • Send()：\u5c06\u4efb\u52a1\u7f16\u53f7\u5199\u5165\u7ba1\u9053\u3002<\/li>\n
                                                    • Close()：\u5173\u95ed\u7236\u8fdb\u7a0b\u6301\u6709\u7684\u7ba1\u9053\u5199\u7aef\u3002<\/li>\n
                                                    • Wait()：\u7b49\u5f85\u5e76\u56de\u6536\u5bf9\u5e94\u7684\u5b50\u8fdb\u7a0b\u3002<\/li>\n<\/ul>\n

                                                      \u2003\u2003\u6ce8\u610f，\u5173\u95ed\u7ba1\u9053\u548c\u56de\u6536\u5b50\u8fdb\u7a0b\u662f\u4e24\u4ef6\u4e0d\u540c\u7684\u4e8b\u3002\u5173\u95ed\u5199\u7aef\u53ef\u4ee5\u8ba9\u5b50\u8fdb\u7a0b\u5728\u8bfb\u5b8c\u5269\u4f59\u6570\u636e\u540e\u8bfb\u5230 EOF；waitpid() \u5219\u8d1f\u8d23\u7b49\u5f85\u5e76\u56de\u6536\u5b50\u8fdb\u7a0b\u3002<\/p>\n

                                                      \u2003\u2003\u5b9e\u9645\u5de5\u7a0b\u4e2d，Send() \u8fd8\u5e94\u68c0\u67e5 write() \u7684\u8fd4\u56de\u503c，\u5e76\u5904\u7406\u5199\u5165\u5931\u8d25\u7b49\u60c5\u51b5\u3002<\/p>\n

                                                      \n

                                                      \u5341\u4e09\u3001ChannelManager：\u5982\u4f55\u8f6e\u6d41\u9009\u62e9\u5b50\u8fdb\u7a0b？<\/h3>\n

                                                      \u2003\u2003\u5f53\u8fdb\u7a0b\u6c60\u4e2d\u6709\u591a\u4e2a\u5b50\u8fdb\u7a0b\u65f6，\u7236\u8fdb\u7a0b\u9700\u8981\u77e5\u9053\u4e0b\u4e00\u6b21\u5e94\u8be5\u5411\u8c01\u6d3e\u53d1\u4efb\u52a1\u3002<\/p>\n

                                                      \u2003\u2003\u53ef\u4ee5\u4f7f\u7528 vector \u4fdd\u5b58\u6240\u6709\u901a\u9053，\u518d\u901a\u8fc7\u8f6e\u8be2\u7684\u65b9\u5f0f\u4f9d\u6b21\u9009\u62e9：<\/p>\n

                                                      class<\/span> ChannelManager<\/span>
                                                      \n{<\/span>
                                                      \npublic<\/span>:<\/span>
                                                      \n ChannelManager<\/span>(<\/span>)<\/span>
                                                      \n :<\/span> _next<\/span>(<\/span>0<\/span>)<\/span>
                                                      \n {<\/span>
                                                      \n }<\/span><\/p>\n

                                                      ~<\/span>ChannelManager<\/span>(<\/span>)<\/span> =<\/span> default<\/span>;<\/span><\/p>\n

                                                      void<\/span> Insert<\/span>(<\/span>int<\/span> wfd,<\/span> pid_t subid)<\/span>
                                                      \n {<\/span>
                                                      \n _channels.<\/span>emplace_back<\/span>(<\/span>wfd,<\/span> subid)<\/span>;<\/span>
                                                      \n }<\/span><\/p>\n

                                                      Channel *<\/span>Select<\/span>(<\/span>)<\/span>
                                                      \n {<\/span>
                                                      \n if<\/span>(<\/span>_channels.<\/span>empty<\/span>(<\/span>)<\/span>)<\/span>
                                                      \n return<\/span> nullptr<\/span>;<\/span><\/p>\n

                                                      Channel *<\/span>c =<\/span> &<\/span>_channels[<\/span>_next]<\/span>;<\/span>
                                                      \n _next++<\/span>;<\/span>
                                                      \n _next %=<\/span> _channels.<\/span>size<\/span>(<\/span>)<\/span>;<\/span>
                                                      \n return<\/span> c;<\/span>
                                                      \n }<\/span><\/p>\n

                                                      void<\/span> PrintProcess<\/span>(<\/span>)<\/span>
                                                      \n {<\/span>
                                                      \n for<\/span> (<\/span>const<\/span> auto<\/span> &<\/span>channel :<\/span> _channels)<\/span>
                                                      \n {<\/span>
                                                      \n std::<\/span>cout <<<\/span> channel.<\/span>Name<\/span>(<\/span>)<\/span> <<<\/span> std::<\/span>endl;<\/span>
                                                      \n }<\/span>
                                                      \n }<\/span><\/p>\n

                                                      void<\/span> StopSubProcess<\/span>(<\/span>)<\/span>
                                                      \n {<\/span>
                                                      \n for<\/span> (<\/span>auto<\/span> &<\/span>channel :<\/span> _channels)<\/span>
                                                      \n {<\/span>
                                                      \n channel.<\/span>Close<\/span>(<\/span>)<\/span>;<\/span>
                                                      \n std::<\/span>cout <<<\/span> "\u5173\u95ed: "<\/span> <<<\/span> channel.<\/span>Name<\/span>(<\/span>)<\/span> <<<\/span> std::<\/span>endl;<\/span>
                                                      \n }<\/span>
                                                      \n }<\/span><\/p>\n

                                                      void<\/span> CloseInheritedWFds<\/span>(<\/span>)<\/span>
                                                      \n {<\/span>
                                                      \n for<\/span> (<\/span>auto<\/span> &<\/span>channel :<\/span> _channels)<\/span>
                                                      \n {<\/span>
                                                      \n channel.<\/span>Close<\/span>(<\/span>)<\/span>;<\/span>
                                                      \n }<\/span>
                                                      \n }<\/span><\/p>\n

                                                      void<\/span> WaitSubProcess<\/span>(<\/span>)<\/span>
                                                      \n {<\/span>
                                                      \n for<\/span> (<\/span>auto<\/span> &<\/span>channel :<\/span> _channels)<\/span>
                                                      \n {<\/span>
                                                      \n channel.<\/span>Wait<\/span>(<\/span>)<\/span>;<\/span>
                                                      \n std::<\/span>cout <<<\/span> "\u56de\u6536："<\/span> <<<\/span> channel.<\/span>Name<\/span>(<\/span>)<\/span> <<<\/span> std::<\/span>endl;<\/span>
                                                      \n }<\/span>
                                                      \n }<\/span><\/p>\n

                                                      private<\/span>:<\/span>
                                                      \n std::<\/span>vector<<\/span>Channel><\/span> _channels;<\/span>
                                                      \n int<\/span> _next;<\/span>
                                                      \n}<\/span>;<\/span><\/p>\n

                                                      \u2003\u2003\u5047\u8bbe\u6709 3 \u4e2a\u5b50\u8fdb\u7a0b，\u9009\u62e9\u987a\u5e8f\u5c31\u662f：<\/p>\n

                                                      \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

                                                      \u2003\u2003\u8fd9\u79cd\u65b9\u5f0f\u53eb\u4f5c\u8f6e\u8be2（Round Robin）\u3002<\/p>\n

                                                      \u2003\u2003\u5b83\u7684\u4f18\u70b9\u662f\u5b9e\u73b0\u7b80\u5355，\u80fd\u591f\u4f9d\u6b21\u5411\u5404\u4e2a\u5b50\u8fdb\u7a0b\u5206\u914d\u4efb\u52a1\u3002\u4e0d\u8fc7，\u5b83\u4e0d\u4f1a\u5224\u65ad\u54ea\u4e2a\u5b50\u8fdb\u7a0b\u5df2\u7ecf\u7a7a\u95f2，\u4e5f\u4e0d\u4f1a\u8003\u8651\u4efb\u52a1\u6267\u884c\u65f6\u95f4\u662f\u5426\u76f8\u540c，\u56e0\u6b64\u5c5e\u4e8e\u57fa\u7840\u7684\u8c03\u5ea6\u7b56\u7565\u3002<\/p>\n

                                                      \n

                                                      \u5341\u56db\u3001ProcessPool：\u628a\u591a\u4e2a\u7ec4\u4ef6\u7ec4\u7ec7\u8d77\u6765<\/h3>\n

                                                      \u2003\u2003\u8fdb\u7a0b\u6c60\u7684\u6838\u5fc3\u5de5\u4f5c，\u5c31\u662f\u521b\u5efa\u5b50\u8fdb\u7a0b\u3001\u5efa\u7acb\u7ba1\u9053\u3001\u6d3e\u53d1\u4efb\u52a1，\u5e76\u5728\u7ed3\u675f\u65f6\u6e05\u7406\u8d44\u6e90\u3002<\/p>\n

                                                      14.1 Start()：\u521b\u5efa\u7ba1\u9053\u548c\u5b50\u8fdb\u7a0b<\/h4>\n

                                                      \u2003\u2003\u6838\u5fc3\u903b\u8f91\u53ef\u4ee5\u7b80\u5316\u4e3a：<\/p>\n

                                                      for<\/span> (<\/span>int<\/span> i =<\/span> 0<\/span>;<\/span> i <<\/span> process_num;<\/span> i++<\/span>)<\/span>
                                                      \n{<\/span>
                                                      \n int<\/span> pipefd[<\/span>2<\/span>]<\/span>;<\/span><\/p>\n

                                                      if<\/span> (<\/span>pipe<\/span>(<\/span>pipefd)<\/span> ==<\/span> –<\/span>1<\/span>)<\/span>
                                                      \n return<\/span> false<\/span>;<\/span><\/p>\n

                                                      pid_t id =<\/span> fork<\/span>(<\/span>)<\/span>;<\/span><\/p>\n

                                                      if<\/span> (<\/span>id ==<\/span> 0<\/span>)<\/span>
                                                      \n {<\/span>
                                                      \n close<\/span>(<\/span>pipefd[<\/span>1<\/span>]<\/span>)<\/span>;<\/span> \/\/ \u5b50\u8fdb\u7a0b\u5173\u95ed\u5f53\u524d\u5199\u7aef<\/span>
                                                      \n Work<\/span>(<\/span>pipefd[<\/span>0<\/span>]<\/span>)<\/span>;<\/span> \/\/ \u4ece\u8bfb\u7aef\u63a5\u6536\u4efb\u52a1<\/span>
                                                      \n close<\/span>(<\/span>pipefd[<\/span>0<\/span>]<\/span>)<\/span>;<\/span>
                                                      \n _exit<\/span>(<\/span>0<\/span>)<\/span>;<\/span>
                                                      \n }<\/span>
                                                      \n else<\/span> if<\/span> (<\/span>id ><\/span> 0<\/span>)<\/span>
                                                      \n {<\/span>
                                                      \n close<\/span>(<\/span>pipefd[<\/span>0<\/span>]<\/span>)<\/span>;<\/span> \/\/ \u7236\u8fdb\u7a0b\u5173\u95ed\u5f53\u524d\u8bfb\u7aef<\/span>
                                                      \n manager.<\/span>Insert<\/span>(<\/span>pipefd[<\/span>1<\/span>]<\/span>,<\/span> id)<\/span>;<\/span>
                                                      \n }<\/span>
                                                      \n else<\/span>
                                                      \n {<\/span>
                                                      \n close<\/span>(<\/span>pipefd[<\/span>0<\/span>]<\/span>)<\/span>;<\/span>
                                                      \n close<\/span>(<\/span>pipefd[<\/span>1<\/span>]<\/span>)<\/span>;<\/span>
                                                      \n return<\/span> false<\/span>;<\/span>
                                                      \n }<\/span>
                                                      \n}<\/span><\/p>\n

                                                      \u8fd9\u6bb5\u4ee3\u7801\u5c55\u793a\u4e86\u6700\u6838\u5fc3\u7684\u7ed3\u6784：<\/p>\n

                                                        \n
                                                      • \u7236\u8fdb\u7a0b\u4fdd\u7559\u7ba1\u9053\u5199\u7aef，\u7528\u6765\u53d1\u9001\u4efb\u52a1\u7f16\u53f7\u3002<\/li>\n
                                                      • \u5b50\u8fdb\u7a0b\u4fdd\u7559\u7ba1\u9053\u8bfb\u7aef，\u7528\u6765\u63a5\u6536\u4efb\u52a1\u7f16\u53f7\u3002<\/li>\n
                                                      • \u6bcf\u6b21\u5faa\u73af\u521b\u5efa\u4e00\u4e2a\u5b50\u8fdb\u7a0b\u548c\u4e00\u6761\u72ec\u7acb\u7ba1\u9053\u3002<\/li>\n<\/ul>\n

                                                        \u2003\u2003\u5b8c\u6574\u5de5\u7a0b\u4ee3\u7801\u8fd8\u9700\u8981\u5728\u521b\u5efa\u5931\u8d25\u65f6\u6e05\u7406\u4e4b\u524d\u521b\u5efa\u7684\u5b50\u8fdb\u7a0b\u548c\u901a\u9053，\u4e0d\u80fd\u53ea\u5904\u7406\u5f53\u524d\u8fd9\u6761\u7ba1\u9053\u3002<\/p>\n

                                                        14.2 \u4e3a\u4ec0\u4e48\u5b50\u8fdb\u7a0b\u5fc5\u987b\u5173\u95ed\u7ee7\u627f\u6765\u7684\u65e7\u5199\u7aef？<\/h4>\n

                                                        \u2003\u2003\u5047\u8bbe\u7236\u8fdb\u7a0b\u5148\u521b\u5efa\u5b50\u8fdb\u7a0b 1，\u518d\u521b\u5efa\u5b50\u8fdb\u7a0b 2\u3002\u7531\u4e8e fork() \u4f1a\u7ee7\u627f\u6587\u4ef6\u63cf\u8ff0\u7b26，\u5b50\u8fdb\u7a0b 2 \u53ef\u80fd\u4e5f\u6301\u6709\u7ba1\u9053 1 \u7684\u5199\u7aef\u3002<\/p>\n

                                                        \u2003\u2003\u5982\u679c\u5b50\u8fdb\u7a0b 2 \u4e0d\u5173\u95ed\u8fd9\u4e2a\u65e0\u5173\u7684\u5199\u7aef，\u90a3\u4e48\u5373\u4f7f\u7236\u8fdb\u7a0b\u548c\u5b50\u8fdb\u7a0b 1 \u90fd\u5173\u95ed\u4e86\u7ba1\u9053 1 \u7684\u5199\u7aef，\u5185\u6838\u4ecd\u7136\u8ba4\u4e3a\u7ba1\u9053 1 \u5b58\u5728\u5199\u7aef\u5f15\u7528\u3002<\/p>\n

                                                        \u2003\u2003\u7ed3\u679c\u5c31\u662f：\u5b50\u8fdb\u7a0b 1 \u53ef\u80fd\u4e00\u76f4\u8bfb\u4e0d\u5230 EOF，\u65e0\u6cd5\u6b63\u5e38\u9000\u51fa\u3002<\/p>\n

                                                        \u2003\u2003\u56e0\u6b64，\u5b9e\u9645\u4ee3\u7801\u4e2d\u7684 CloseInheritedWFds() \u5c31\u662f\u7528\u6765\u5173\u95ed\u5b50\u8fdb\u7a0b\u7ee7\u627f\u6765\u7684\u3001\u81ea\u5df1\u4e0d\u9700\u8981\u7684\u65e7\u5199\u7aef\u3002<\/p>\n

                                                        \u2003\u2003\u539f\u5219：\u6bcf\u4e2a\u8fdb\u7a0b\u90fd\u5e94\u8be5\u53ca\u65f6\u5173\u95ed\u81ea\u5df1\u4e0d\u4f7f\u7528\u7684\u7ba1\u9053\u7aef，\u5426\u5219\u53ef\u80fd\u5bfc\u81f4 EOF \u65e0\u6cd5\u51fa\u73b0，\u751a\u81f3\u8ba9\u7a0b\u5e8f\u4e00\u76f4\u963b\u585e\u3002<\/p>\n

                                                        14.3 Work()：\u5b50\u8fdb\u7a0b\u5982\u4f55\u6267\u884c\u4efb\u52a1？<\/h4>\n

                                                        \u2003\u2003\u5b50\u8fdb\u7a0b\u7684\u5de5\u4f5c\u5faa\u73af\u53ef\u4ee5\u6982\u62ec\u4e3a：<\/p>\n

                                                        void<\/span> Work<\/span>(<\/span>int<\/span> rfd)<\/span>
                                                        \n{<\/span>
                                                        \n while<\/span> (<\/span>true<\/span>)<\/span>
                                                        \n {<\/span>
                                                        \n int<\/span> code;<\/span>
                                                        \n ssize_t n =<\/span> read<\/span>(<\/span>rfd,<\/span> &<\/span>code,<\/span> sizeof<\/span>(<\/span>code)<\/span>)<\/span>;<\/span><\/p>\n

                                                        if<\/span> (<\/span>n ==<\/span> 0<\/span>)<\/span>
                                                        \n break<\/span>;<\/span> \/\/ \u6240\u6709\u5199\u7aef\u5173\u95ed，\u4e14\u6570\u636e\u5df2\u7ecf\u8bfb\u5b8c<\/span><\/p>\n

                                                        if<\/span> (<\/span>n ==<\/span> sizeof<\/span>(<\/span>code)<\/span>)<\/span>
                                                        \n task_manager.<\/span>Execute<\/span>(<\/span>code)<\/span>;<\/span>
                                                        \n else<\/span>
                                                        \n break<\/span>;<\/span> \/\/ \u7b80\u5316\u793a\u4f8b，\u5b9e\u9645\u4ee3\u7801\u9700\u8981\u5b8c\u5584\u9519\u8bef\u5904\u7406<\/span>
                                                        \n }<\/span>
                                                        \n}<\/span><\/p>\n

                                                        \u2003\u2003\u5b50\u8fdb\u7a0b\u4e0d\u65ad\u8bfb\u53d6\u4efb\u52a1\u7f16\u53f7，\u518d\u8c03\u7528 Execute() \u6267\u884c\u5bf9\u5e94\u4efb\u52a1\u3002<\/p>\n

                                                        \u2003\u2003\u8fd9\u91cc\u8981\u6ce8\u610f，\u7ba1\u9053\u662f\u5b57\u8282\u6d41\u3002\u771f\u5b9e\u5de5\u7a0b\u4ee3\u7801\u8fd8\u9700\u8981\u59a5\u5584\u5904\u7406\u77ed\u8bfb\u3001\u7cfb\u7edf\u8c03\u7528\u88ab\u4fe1\u53f7\u4e2d\u65ad\u7b49\u60c5\u51b5，\u4e0d\u80fd\u76f4\u63a5\u628a\u6240\u6709\u975e\u5b8c\u6574\u8bfb\u53d6\u90fd\u5f53\u4f5c\u6b63\u5e38\u7ed3\u675f\u3002<\/p>\n

                                                        14.4 Run()：\u7236\u8fdb\u7a0b\u5982\u4f55\u6d3e\u53d1\u4efb\u52a1？<\/h4>\n

                                                        \u2003\u2003\u7236\u8fdb\u7a0b\u7684\u4efb\u52a1\u6d3e\u53d1\u6d41\u7a0b\u53ef\u4ee5\u6982\u62ec\u4e3a：<\/p>\n

                                                        int<\/span> code =<\/span> task_manager.<\/span>Code<\/span>(<\/span>)<\/span>;<\/span><\/p>\n

                                                        Channel*<\/span> c =<\/span> channel_manager.<\/span>Select<\/span>(<\/span>)<\/span>;<\/span><\/p>\n

                                                        if<\/span> (<\/span>code >=<\/span> 0<\/span> &&<\/span> c !=<\/span> nullptr<\/span>)<\/span>
                                                        \n c-><\/span>Send<\/span>(<\/span>code)<\/span>;<\/span><\/p>\n

                                                        \u6574\u4e2a\u8fc7\u7a0b\u5c31\u662f：<\/p>\n

                                                      • \u751f\u6210\u4efb\u52a1\u7f16\u53f7\u3002<\/li>\n
                                                      • \u8f6e\u8be2\u9009\u62e9\u4e00\u4e2a\u5b50\u8fdb\u7a0b\u3002<\/li>\n
                                                      • \u901a\u8fc7\u5bf9\u5e94\u7ba1\u9053\u53d1\u9001\u4efb\u52a1\u7f16\u53f7\u3002<\/li>\n
                                                      • \u5b50\u8fdb\u7a0b\u8bfb\u53d6\u7f16\u53f7\u5e76\u6267\u884c\u4efb\u52a1\u3002<\/li>\n

                                                        \u2003\u2003\u8fd9\u91cc\u7684 Run() \u53ea\u8d1f\u8d23\u6d3e\u53d1\u4efb\u52a1，\u4e0d\u4ee3\u8868\u4efb\u52a1\u5df2\u7ecf\u6267\u884c\u5b8c\u6210\u3002\u5982\u679c\u9700\u8981\u77e5\u9053\u4efb\u52a1\u662f\u5426\u5b8c\u6210，\u8fd8\u9700\u8981\u989d\u5916\u8bbe\u8ba1\u53cd\u9988\u673a\u5236\u3002<\/p>\n

                                                        14.5 Stop()：\u5982\u4f55\u8ba9\u5b50\u8fdb\u7a0b\u6b63\u5e38\u9000\u51fa？<\/h4>\n

                                                        \u2003\u2003\u8fdb\u7a0b\u6c60\u7ed3\u675f\u65f6，\u901a\u5e38\u5148\u5173\u95ed\u6240\u6709\u7236\u8fdb\u7a0b\u6301\u6709\u7684\u7ba1\u9053\u5199\u7aef，\u518d\u7b49\u5f85\u5e76\u56de\u6536\u5b50\u8fdb\u7a0b：<\/p>\n

                                                        void<\/span> Stop<\/span>(<\/span>)<\/span>
                                                        \n{<\/span>
                                                        \n manager.<\/span>StopSubProcess<\/span>(<\/span>)<\/span>;<\/span> \/\/ \u5173\u95ed\u6240\u6709\u5199\u7aef<\/span>
                                                        \n manager.<\/span>WaitSubProcess<\/span>(<\/span>)<\/span>;<\/span> \/\/ \u7b49\u5f85\u5e76\u56de\u6536\u5b50\u8fdb\u7a0b<\/span>
                                                        \n}<\/span><\/p>\n

                                                        \u2003\u2003\u4e3a\u4ec0\u4e48\u4e0d\u80fd\u76f4\u63a5\u5148\u7b49\u5f85？<\/p>\n

                                                        \u2003\u2003\u56e0\u4e3a\u5b50\u8fdb\u7a0b\u53ef\u80fd\u8fd8\u963b\u585e\u5728 read() \u4e2d\u3002\u5982\u679c\u7236\u8fdb\u7a0b\u6ca1\u6709\u5173\u95ed\u5199\u7aef，\u5b50\u8fdb\u7a0b\u53ef\u80fd\u4e00\u76f4\u7b49\u4e0d\u5230\u6570\u636e\u6216 EOF，\u7236\u8fdb\u7a0b\u4e5f\u5c31\u65e0\u6cd5\u987a\u5229\u7b49\u5230\u5b83\u9000\u51fa\u3002<\/p>\n

                                                        \u2003\u2003\u6240\u4ee5，\u505c\u6b62\u8fdb\u7a0b\u6c60\u7684\u5173\u952e\u987a\u5e8f\u662f：<\/p>\n

                                                        \u2003\u2003\u5173\u95ed\u5199\u7aef \u2192 \u5b50\u8fdb\u7a0b\u8bfb\u5230 EOF \u5e76\u9000\u51fa \u2192 \u7236\u8fdb\u7a0b\u901a\u8fc7 waitpid() \u56de\u6536\u5b50\u8fdb\u7a0b\u3002<\/p>\n

                                                        ProcessPool \u4ee3\u7801：<\/p>\n

                                                        class<\/span> ProcessPool<\/span>
                                                        \n{<\/span>
                                                        \npublic<\/span>:<\/span>
                                                        \n ProcessPool<\/span>(<\/span>int<\/span> num)<\/span>
                                                        \n :<\/span> _process_name<\/span>(<\/span>num)<\/span>
                                                        \n {<\/span>
                                                        \n _tm.<\/span>Register<\/span>(<\/span>PrintLog)<\/span>;<\/span>
                                                        \n _tm.<\/span>Register<\/span>(<\/span>DownLoad)<\/span>;<\/span>
                                                        \n _tm.<\/span>Register<\/span>(<\/span>UpLoad)<\/span>;<\/span>
                                                        \n }<\/span><\/p>\n

                                                        ~<\/span>ProcessPool<\/span>(<\/span>)<\/span> =<\/span> default<\/span>;<\/span><\/p>\n

                                                        void<\/span> Work<\/span>(<\/span>int<\/span> rfd)<\/span>
                                                        \n {<\/span>
                                                        \n while<\/span> (<\/span>true<\/span>)<\/span>
                                                        \n {<\/span>
                                                        \n int<\/span> code =<\/span> 0<\/span>;<\/span>
                                                        \n size_t n =<\/span> read<\/span>(<\/span>rfd,<\/span> &<\/span>code,<\/span> sizeof<\/span>(<\/span>code)<\/span>)<\/span>;<\/span>
                                                        \n if<\/span> (<\/span>n ><\/span> 0<\/span>)<\/span>
                                                        \n {<\/span>
                                                        \n if<\/span> (<\/span>n <<\/span> sizeof<\/span>(<\/span>code)<\/span>)<\/span>
                                                        \n continue<\/span>;<\/span>
                                                        \n std::<\/span>cout <<<\/span> "\u5b50\u8fdb\u7a0b["<\/span> <<<\/span> getpid<\/span>(<\/span>)<\/span> <<<\/span> "]\u6267\u884c\u4efb\u52a1："<\/span> <<<\/span> code <<<\/span> std::<\/span>endl;<\/span>
                                                        \n _tm.<\/span>Execute<\/span>(<\/span>code)<\/span>;<\/span>
                                                        \n }<\/span>
                                                        \n else<\/span> if<\/span> (<\/span>n ==<\/span> 0<\/span>)<\/span>
                                                        \n {<\/span>
                                                        \n std::<\/span>cout <<<\/span> "\u5b50\u8fdb\u7a0b\u9000\u51fa！"<\/span> <<<\/span> std::<\/span>endl;<\/span>
                                                        \n break<\/span>;<\/span>
                                                        \n }<\/span>
                                                        \n else<\/span>
                                                        \n {<\/span>
                                                        \n std::<\/span>cout <<<\/span> "\u8bfb\u53d6\u9519\u8bef！"<\/span> <<<\/span> std::<\/span>endl;<\/span>
                                                        \n break<\/span>;<\/span>
                                                        \n }<\/span>
                                                        \n }<\/span>
                                                        \n }<\/span><\/p>\n

                                                        bool<\/span> Start<\/span>(<\/span>)<\/span>
                                                        \n {<\/span>
                                                        \n for<\/span> (<\/span>int<\/span> i =<\/span> 0<\/span>;<\/span> i <<\/span> _process_name;<\/span> i++<\/span>)<\/span>
                                                        \n {<\/span>
                                                        \n int<\/span> pipefd[<\/span>2<\/span>]<\/span> =<\/span> {<\/span>0<\/span>}<\/span>;<\/span>
                                                        \n pid_t n =<\/span> pipe<\/span>(<\/span>pipefd)<\/span>;<\/span>
                                                        \n if<\/span> (<\/span>n <<\/span> 0<\/span>)<\/span>
                                                        \n {<\/span>
                                                        \n _cm.<\/span>StopSubProcess<\/span>(<\/span>)<\/span>;<\/span> \/\/ \u5173\u95ed\u7236\u8fdb\u7a0b\u4fdd\u5b58\u7684\u7ba1\u9053\u5199\u7aef<\/span>
                                                        \n _cm.<\/span>WaitSubProcess<\/span>(<\/span>)<\/span>;<\/span> \/\/ \u8c03\u7528waitpid(),\u7b49\u5f85\u5e76\u56de\u6536\u5b50\u8fdb\u7a0b<\/span>
                                                        \n return<\/span> false<\/span>;<\/span>
                                                        \n }<\/span><\/p>\n

                                                        pid_t subid =<\/span> fork<\/span>(<\/span>)<\/span>;<\/span>
                                                        \n if<\/span> (<\/span>subid <<\/span> 0<\/span>)<\/span>
                                                        \n {<\/span>
                                                        \n \/\/ \u6e05\u7406\u5f53\u524d\u521b\u5efa\u7684\u5b50\u8fdb\u7a0b<\/span>
                                                        \n close<\/span>(<\/span>pipefd[<\/span>1<\/span>]<\/span>)<\/span>;<\/span>
                                                        \n close<\/span>(<\/span>pipefd[<\/span>0<\/span>]<\/span>)<\/span>;<\/span><\/p>\n

                                                        \/\/ \u5173\u95ed\u4e4b\u524d\u4fdd\u5b58\u7684\u6240\u6709\u7236\u8fdb\u7a0b\u7684\u5199\u7aef<\/span>
                                                        \n _cm.<\/span>StopSubProcess<\/span>(<\/span>)<\/span>;<\/span><\/p>\n

                                                        \/\/ \u7b49\u5f85\u5e76\u56de\u6536\u4e4b\u524d\u521b\u5efa\u7684\u5b50\u8fdb\u7a0b<\/span>
                                                        \n _cm.<\/span>WaitSubProcess<\/span>(<\/span>)<\/span>;<\/span><\/p>\n

                                                        return<\/span> false<\/span>;<\/span>
                                                        \n }<\/span>
                                                        \n else<\/span> if<\/span> (<\/span>subid ==<\/span> 0<\/span>)<\/span>
                                                        \n {<\/span>
                                                        \n \/\/ \u5b50\u8fdb\u7a0b<\/span><\/p>\n

                                                        \/\/ \u5173\u95ed\u4ece\u7236\u8fdb\u7a0b\u7ee7\u627f\u8fc7\u6765\u7684\u65e7\u7ba1\u9053\u5199\u7aef<\/span>
                                                        \n _cm.<\/span>CloseInheritedWFds<\/span>(<\/span>)<\/span>;<\/span><\/p>\n

                                                        close<\/span>(<\/span>pipefd[<\/span>1<\/span>]<\/span>)<\/span>;<\/span>
                                                        \n Work<\/span>(<\/span>pipefd[<\/span>0<\/span>]<\/span>)<\/span>;<\/span>
                                                        \n close<\/span>(<\/span>pipefd[<\/span>0<\/span>]<\/span>)<\/span>;<\/span><\/p>\n

                                                        _exit<\/span>(<\/span>0<\/span>)<\/span>;<\/span>
                                                        \n }<\/span>
                                                        \n else<\/span>
                                                        \n {<\/span>
                                                        \n close<\/span>(<\/span>pipefd[<\/span>0<\/span>]<\/span>)<\/span>;<\/span>
                                                        \n _cm.<\/span>Insert<\/span>(<\/span>pipefd[<\/span>1<\/span>]<\/span>,<\/span> subid)<\/span>;<\/span>
                                                        \n }<\/span>
                                                        \n }<\/span>
                                                        \n return<\/span> true<\/span>;<\/span>
                                                        \n }<\/span><\/p>\n

                                                        void<\/span> Debug<\/span>(<\/span>)<\/span>
                                                        \n {<\/span>
                                                        \n _cm.<\/span>PrintProcess<\/span>(<\/span>)<\/span>;<\/span>
                                                        \n }<\/span><\/p>\n

                                                        void<\/span> Run<\/span>(<\/span>)<\/span>
                                                        \n {<\/span>
                                                        \n int<\/span> taskcode =<\/span> _tm.<\/span>Code<\/span>(<\/span>)<\/span>;<\/span>
                                                        \n if<\/span>(<\/span>taskcode <<\/span> 0<\/span>)<\/span>
                                                        \n {<\/span>
                                                        \n std::<\/span>cerr <<<\/span> "\u6ca1\u6709\u53ef\u7528\u7684\u4efb\u52a1，\u65e0\u6cd5\u6d3e\u53d1"<\/span> <<<\/span> std::<\/span>endl;<\/span>
                                                        \n return<\/span>;<\/span>
                                                        \n }<\/span><\/p>\n

                                                        Channel*<\/span> c =<\/span> _cm.<\/span>Select<\/span>(<\/span>)<\/span>;<\/span>
                                                        \n if<\/span> (<\/span>c ==<\/span> nullptr<\/span>)<\/span>
                                                        \n {<\/span>
                                                        \n std::<\/span>cerr <<<\/span> "\u6ca1\u6709\u53ef\u7528\u7684\u5b50\u8fdb\u7a0b，\u65e0\u6cd5\u6d3e\u53d1\u4efb\u52a1"<\/span> <<<\/span> std::<\/span>endl;<\/span>
                                                        \n return<\/span>;<\/span>
                                                        \n }<\/span>
                                                        \n std::<\/span>cout <<<\/span> "\u9009\u62e9\u4e86\u4e00\u4e2a\u5b50\u8fdb\u7a0b："<\/span> <<<\/span> c-><\/span>Name<\/span>(<\/span>)<\/span> <<<\/span> std::<\/span>endl;<\/span><\/p>\n

                                                        c-><\/span>Send<\/span>(<\/span>taskcode)<\/span>;<\/span>
                                                        \n std::<\/span>cout <<<\/span> "\u53d1\u9001\u4e86\u4e00\u4e2a\u4efb\u52a1\u7801："<\/span> <<<\/span> taskcode <<<\/span> std::<\/span>endl;<\/span>
                                                        \n }<\/span><\/p>\n

                                                        void<\/span> Stop<\/span>(<\/span>)<\/span>
                                                        \n {<\/span>
                                                        \n _cm.<\/span>StopSubProcess<\/span>(<\/span>)<\/span>;<\/span>
                                                        \n _cm.<\/span>WaitSubProcess<\/span>(<\/span>)<\/span>;<\/span>
                                                        \n }<\/span><\/p>\n

                                                        private<\/span>:<\/span>
                                                        \n ChannelManager _cm;<\/span>
                                                        \n int<\/span> _process_name;<\/span>
                                                        \n TaskManager _tm;<\/span>
                                                        \n}<\/span>;<\/span><\/p>\n

                                                        \u2003\u2003\u81f3\u6b64，\u8fdb\u7a0b\u6c60\u5c31\u5c06 pipe()\u3001fork()\u3001read()\u3001write()\u3001close() \u548c waitpid() \u8fd9\u4e9b\u77e5\u8bc6\u70b9\u4e32\u8054\u4e86\u8d77\u6765\u3002<\/p>\n

                                                        \n

                                                        \u7ed3\u8bed：<\/h3>\n

                                                        \u2003\u2003\u4eca\u5929\u7684\u5185\u5bb9\u5230\u8fd9\u91cc\u5c31\u7ed3\u675f\u4e86，\u5e0c\u671b\u4f60\u80fd\u6709\u6240\u6536\u83b7~<\/p>\n

                                                        \u5e72\u8d27\u6574\u7406\u5230\u624b\u6296，\u89c9\u5f97\u6709\u7528\u7684\u8bdd，\u8d4f\u4e2a\u4e09\u8fde\u56de\u56de\u8840？<\/font>__(:\u15e4\u300d\u3125)_ _<\/p>\n","protected":false},"excerpt":{"rendered":"

                                                        \u5927\u5bb6\u597d，\u6b22\u8fce\u6765\u5230 huangjin007_ \u7684\u535a\u5ba2 \u2b50 \u4e2a\u4eba\u4e3b\u9875：huangjin007_ 🔥 \u6587\u7ae0\u6536\u5f55\u4e13\u680f：Linux \u5185\u529f\u4fee\u70bc\u624b\u518c(\u7cfb\u7edf\u7bc7) \u603b\u4f1a\u6709\u4e00\u4e9b\u575a\u6301\u80fd\u4ece\u51b0\u5c01\u7684\u571f\u5730\u91cc\u57f9\u80b2\u51fa\u5341\u4e07\u6735\u6012\u653e\u7684\u8537\u8587 Linux \u7cfb\u7edf\u7bc7(\u4e09\u5341\u4e00) \u2014\u2014 \u4ece\u7ba1\u9053\u539f\u7406\u5230\u8fdb\u7a0b\u6c60\u5b9e\u6218 \u6587\u7ae0\u76ee\u5f55Linux \u7cfb\u7edf\u7bc7(\u4e09\u5341\u4e00) \u2014\u2014 \u4ece\u7ba1\u9053\u539f\u7406\u5230\u8fdb\u7a0b\u6c60\u5b9e\u6218\u4e00\u3001\u8fdb\u7a0b\u95f4\u901a\u4fe1：\u4e3a\u4ec0\u4e48\u8fdb\u7a0b\u4e4b\u95f4\u9700\u8981\u901a\u4fe1？1.1 \u5148\u601d\u8003\u4e00\u4e2a\u95ee\u9898&#<\/p>\n","protected":false},"author":2,"featured_media":117265,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[11820,58,44],"topic":[],"class_list":["post-117271","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-atomgit","tag-linux","tag-44"],"yoast_head":"\n\u3010Linux \u7cfb\u7edf\u7bc7(\u4e09\u5341\u4e00)\u3011\u901a\u4fe1(\u4e00)\uff1a\u4ece\u7ba1\u9053\u539f\u7406\u5230\u8fdb\u7a0b\u6c60\u5b9e\u6218 - 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