{"id":198438,"date":"2024-11-14T18:24:22","date_gmt":"2024-11-14T10:24:22","guid":{"rendered":"https:\/\/server.hk\/cnblog\/198438\/"},"modified":"2024-11-14T18:24:22","modified_gmt":"2024-11-14T10:24:22","slug":"%e3%80%8clinux%e3%80%8d%e5%ad%90%e7%b7%9a%e7%a8%8b%e4%b8%8d%e9%98%bb%e5%a1%9e%e4%b8%bb%e7%b7%9a%e7%a8%8b%ef%bc%9a%e5%a6%82%e4%bd%95%e5%af%a6%e7%8f%be%ef%bc%9f-linux%e5%ad%90%e7%b7%9a%e7%a8%8b","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/198438\/","title":{"rendered":"\u300cLinux\u300d\u5b50\u7dda\u7a0b\u4e0d\u963b\u585e\u4e3b\u7dda\u7a0b\uff1a\u5982\u4f55\u5be6\u73fe\uff1f (linux\u5b50\u7dda\u7a0b\u5982\u4f55\u4e0d\u963b\u585e\u4e3b\u7dda\u7a0b)"},"content":{"rendered":"

\u300cLinux\u300d\u5b50\u7dda\u7a0b\u4e0d\u963b\u585e\u4e3b\u7dda\u7a0b\uff1a\u5982\u4f55\u5be6\u73fe\uff1f<\/h1>\n

\u5728Linux\u7cfb\u7d71\u4e2d\uff0c\u5b50\u7dda\u7a0b\uff08Thread\uff09\u662f\u4e00\u7a2e\u8f15\u91cf\u7d1a\u7684\u57f7\u884c\u55ae\u5143\uff0c\u80fd\u5920\u8207\u4e3b\u7dda\u7a0b\u5171\u4eab\u76f8\u540c\u7684\u5167\u5b58\u7a7a\u9593\u3002\u9019\u4f7f\u5f97\u591a\u7dda\u7a0b\u7de8\u7a0b\u5728\u8655\u7406\u4e26\u884c\u4efb\u52d9\u6642\u975e\u5e38\u9ad8\u6548\u3002\u7136\u800c\uff0c\u7576\u5b50\u7dda\u7a0b\u57f7\u884c\u67d0\u4e9b\u963b\u585e\u64cd\u4f5c\u6642\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u4e3b\u7dda\u7a0b\u7121\u6cd5\u7e7c\u7e8c\u57f7\u884c\uff0c\u9019\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u97ff\u61c9\u7684\u61c9\u7528\u7a0b\u5e8f\u4f86\u8aaa\u662f\u4e0d\u53ef\u63a5\u53d7\u7684\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5728Linux\u4e2d\u5be6\u73fe\u5b50\u7dda\u7a0b\u4e0d\u963b\u585e\u4e3b\u7dda\u7a0b\u7684\u6280\u8853\u548c\u65b9\u6cd5\u3002<\/p>\n

\u4ec0\u9ebc\u662f\u963b\u585e\u64cd\u4f5c\uff1f<\/h2>\n

\u963b\u585e\u64cd\u4f5c\u662f\u6307\u5728\u57f7\u884c\u67d0\u4e9b\u4efb\u52d9\u6642\uff0c\u7dda\u7a0b\u6703\u7b49\u5f85\u67d0\u500b\u4e8b\u4ef6\u7684\u767c\u751f\uff0c\u4f8b\u5982I\/O\u64cd\u4f5c\u3001\u7db2\u7d61\u8acb\u6c42\u6216\u8cc7\u6e90\u7684\u7372\u53d6\u7b49\u3002\u5728\u9019\u6bb5\u6642\u9593\u5167\uff0c\u7dda\u7a0b\u7121\u6cd5\u57f7\u884c\u5176\u4ed6\u4efb\u52d9\uff0c\u9019\u6703\u5f71\u97ff\u6574\u9ad4\u7684\u6027\u80fd\u548c\u97ff\u61c9\u901f\u5ea6\u3002<\/p>\n

\u5982\u4f55\u5be6\u73fe\u5b50\u7dda\u7a0b\u4e0d\u963b\u585e\u4e3b\u7dda\u7a0b<\/h2>\n

\u70ba\u4e86\u5be6\u73fe\u5b50\u7dda\u7a0b\u4e0d\u963b\u585e\u4e3b\u7dda\u7a0b\uff0c\u53ef\u4ee5\u63a1\u7528\u4ee5\u4e0b\u5e7e\u7a2e\u65b9\u6cd5\uff1a<\/p>\n

1. \u4f7f\u7528\u975e\u963b\u585eI\/O<\/h3>\n

\u975e\u963b\u585eI\/O\u5141\u8a31\u7dda\u7a0b\u5728\u57f7\u884cI\/O\u64cd\u4f5c\u6642\u4e0d\u6703\u88ab\u963b\u585e\u3002\u9019\u53ef\u4ee5\u901a\u904e\u8a2d\u7f6e\u6587\u4ef6\u63cf\u8ff0\u7b26\u70ba\u975e\u963b\u585e\u6a21\u5f0f\u4f86\u5be6\u73fe\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff1a<\/p>\n

\n#include <fcntl.h>\n#include <unistd.h>\n\nint main() {\n    int fd = open(\"file.txt\", O_RDONLY | O_NONBLOCK);\n    char buffer[100];\n    ssize_t bytesRead;\n\n    while (1) {\n        bytesRead = read(fd, buffer, sizeof(buffer));\n        if (bytesRead == -1) {\n            \/\/ \u8655\u7406\u932f\u8aa4\u6216\u7e7c\u7e8c\u5176\u4ed6\u4efb\u52d9\n        } else if (bytesRead == 0) {\n            \/\/ \u6587\u4ef6\u7d50\u675f\n            break;\n        } else {\n            \/\/ \u8655\u7406\u8b80\u53d6\u7684\u6578\u64da\n        }\n    }\n    close(fd);\n    return 0;\n}\n<\/code><\/pre>\n
2. \u4f7f\u7528\u591a\u7dda\u7a0b\u548c\u689d\u4ef6\u8b8a\u91cf<\/h3>\n
\u5728\u591a\u7dda\u7a0b\u74b0\u5883\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u689d\u4ef6\u8b8a\u91cf\u4f86\u5354\u8abf\u7dda\u7a0b\u4e4b\u9593\u7684\u5de5\u4f5c\u3002\u4e3b\u7dda\u7a0b\u53ef\u4ee5\u5728\u7b49\u5f85\u67d0\u500b\u689d\u4ef6\u6642\u9032\u884c\u5176\u4ed6\u64cd\u4f5c\uff0c\u800c\u5b50\u7dda\u7a0b\u5247\u5728\u6eff\u8db3\u689d\u4ef6\u6642\u901a\u77e5\u4e3b\u7dda\u7a0b\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\uff1a<\/p>\n
\n#include <pthread.h>\n#include <stdio.h>\n\npthread_mutex_t mutex;\npthread_cond_t cond;\nint ready = 0;\n\nvoid* threadFunc(void* arg) {\n    \/\/ \u6a21\u64ec\u4e00\u4e9b\u5de5\u4f5c\n    sleep(1);\n    pthread_mutex_lock(&mutex);\n    ready = 1;\n    pthread_cond_signal(&cond);\n    pthread_mutex_unlock(&mutex);\n    return NULL;\n}\n\nint main() {\n    pthread_t thread;\n    pthread_mutex_init(&mutex, NULL);\n    pthread_cond_init(&cond, NULL);\n\n    pthread_create(&thread, NULL, threadFunc, NULL);\n\n    pthread_mutex_lock(&mutex);\n    while (!ready) {\n        pthread_cond_wait(&cond, &mutex);\n    }\n    pthread_mutex_unlock(&mutex);\n\n    printf(\"\u5b50\u7dda\u7a0b\u5df2\u5b8c\u6210\u5de5\u4f5cn\");\n    pthread_join(thread, NULL);\n    pthread_mutex_destroy(&mutex);\n    pthread_cond_destroy(&cond);\n    return 0;\n}\n<\/code><\/pre>\n
3. \u4f7f\u7528\u4e8b\u4ef6\u9a45\u52d5\u6a21\u578b<\/h3>\n
\u4e8b\u4ef6\u9a45\u52d5\u6a21\u578b\u662f\u4e00\u7a2e\u8a2d\u8a08\u6a21\u5f0f\uff0c\u5141\u8a31\u61c9\u7528\u7a0b\u5e8f\u5728\u7b49\u5f85\u4e8b\u4ef6\u767c\u751f\u6642\u4e0d\u6703\u963b\u585e\u3002\u9019\u901a\u5e38\u901a\u904e\u4f7f\u7528\u4e8b\u4ef6\u5faa\u74b0\u548c\u56de\u8abf\u51fd\u6578\u4f86\u5be6\u73fe\u3002\u9019\u7a2e\u65b9\u6cd5\u5728\u8655\u7406\u5927\u91cf\u4e26\u767c\u9023\u63a5\u6642\u7279\u5225\u6709\u6548\uff0c\u4f8b\u5982\u5728\u7db2\u7d61\u670d\u52d9\u5668\u4e2d\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
\u5728Linux\u4e2d\uff0c\u5be6\u73fe\u5b50\u7dda\u7a0b\u4e0d\u963b\u585e\u4e3b\u7dda\u7a0b\u7684\u95dc\u9375\u5728\u65bc\u9078\u64c7\u5408\u9069\u7684\u7de8\u7a0b\u6a21\u5f0f\u548c\u6280\u8853\u3002\u901a\u904e\u4f7f\u7528\u975e\u963b\u585eI\/O\u3001\u591a\u7dda\u7a0b\u5354\u8abf\u548c\u4e8b\u4ef6\u9a45\u52d5\u6a21\u578b\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u63d0\u9ad8\u61c9\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\u548c\u97ff\u61c9\u901f\u5ea6\u3002\u9019\u4e9b\u6280\u8853\u4e0d\u50c5\u9069\u7528\u65bc\u670d\u52d9\u5668\u7aef\u61c9\u7528\uff0c\u4e5f\u53ef\u4ee5\u61c9\u7528\u65bc\u5404\u7a2e\u9700\u8981\u9ad8\u6548\u8655\u7406\u7684\u5834\u666f\u3002<\/p>\n
\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u9069\u5408\u5404\u7a2e\u9700\u6c42\u3002\u7121\u8ad6\u662f\u9700\u8981\u7a69\u5b9a\u7684 \u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u9084\u662f\u9748\u6d3b\u7684 \u96f2\u4f3a\u670d\u5668<\/a>\uff0c\u6211\u5011\u90fd\u80fd\u6eff\u8db3\u60a8\u7684\u9700\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u63a2\u7d22\u5982\u4f55\u5728Linux\u4e2d\u5be6\u73fe\u5b50\u7dda\u7a0b\u4e0d\u963b\u585e\u4e3b\u7dda\u7a0b\u7684\u6280\u8853\uff0c\u63d0\u5347\u61c9\u7528\u6027\u80fd\u8207\u97ff\u61c9\u901f\u5ea6\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4924],"tags":[],"class_list":["post-198438","post","type-post","status-publish","format-standard","hentry","category-setup-tutorials"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/198438","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=198438"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/198438\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=198438"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=198438"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=198438"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}