{"id":62867,"date":"2025-04-29T12:54:24","date_gmt":"2025-04-29T04:54:24","guid":{"rendered":"https:\/\/fwq.ai\/blog\/62867\/"},"modified":"2025-04-29T12:54:24","modified_gmt":"2025-04-29T04:54:24","slug":"%e6%8e%a2%e7%b4%a2linux%e7%bc%93%e5%ad%98%e6%9c%ba%e5%88%b6%ef%bc%9a%e5%86%85%e5%ad%98%e3%80%81%e7%a3%81%e7%9b%98%e5%92%8c%e6%96%87%e4%bb%b6%e7%b3%bb%e7%bb%9f%e7%9a%84%e7%bc%93%e5%ad%98%e8%af%a6-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/62867\/","title":{"rendered":"\u63a2\u7d22Linux\u7f13\u5b58\u673a\u5236\uff1a\u5185\u5b58\u3001\u78c1\u76d8\u548c\u6587\u4ef6\u7cfb\u7edf\u7684\u7f13\u5b58\u8be6\u89e3"},"content":{"rendered":"

\"\u63a2\u7d22Linux\u7f13\u5b58\u673a\u5236\uff1a\u5185\u5b58\u3001\u78c1\u76d8\u548c\u6587\u4ef6\u7cfb\u7edf\u7684\u7f13\u5b58\u8be6\u89e3\u63d2\u56fe\"<\/p>\n

\u6df1\u5165\u4e86\u89e3Linux\u7f13\u5b58\u673a\u5236\uff1a\u5185\u5b58\u7f13\u5b58\u3001\u78c1\u76d8\u7f13\u5b58\u548c\u6587\u4ef6\u7cfb\u7edf\u7f13\u5b58<\/p>\n

\u5bfc\u8bfb\uff1a\u5728Linux\u7cfb\u7edf\u4e2d\uff0c\u7f13\u5b58\u662f\u4e00\u79cd\u91cd\u8981\u7684\u673a\u5236\uff0c\u7528\u4e8e\u52a0\u901f\u6570\u636e\u8bbf\u95ee\u548c\u63d0\u9ad8\u7cfb\u7edf\u6027\u80fd\u3002\u672c\u6587\u5c06\u6df1\u5165\u63a2\u8ba8Linux\u4e2d\u7684\u4e09\u79cd\u7f13\u5b58\u673a\u5236\uff1a\u5185\u5b58\u7f13\u5b58\u3001\u78c1\u76d8\u7f13\u5b58\u548c\u6587\u4ef6\u7cfb\u7edf\u7f13\u5b58\uff0c\u5e76\u63d0\u4f9b\u5177\u4f53\u4ee3\u7801\u793a\u4f8b\uff0c\u4ee5\u5e2e\u52a9\u8bfb\u8005\u66f4\u597d\u5730\u7406\u89e3\u548c\u4f7f\u7528\u8fd9\u4e9b\u7f13\u5b58\u673a\u5236\u3002<\/p>\n

\u4e00\u3001\u5185\u5b58\u7f13\u5b58<\/p>\n

\u5185\u5b58\u7f13\u5b58\u662f\u6307Linux\u7cfb\u7edf\u5c06\u78c1\u76d8\u4e0a\u7684\u6587\u4ef6\u6570\u636e\u7f13\u5b58\u5728\u5185\u5b58\u4e2d\uff0c\u4ee5\u51cf\u5c11\u5bf9\u78c1\u76d8\u7684\u9891\u7e41\u8bfb\u5199\uff0c\u4ece\u800c\u52a0\u5feb\u6570\u636e\u8bbf\u95ee\u901f\u5ea6\u3002Linux\u7cfb\u7edf\u4e2d\u7684\u5185\u5b58\u7f13\u5b58\u4e3b\u8981\u7531page cache\u7ec4\u6210\u3002\u5f53\u5e94\u7528\u7a0b\u5e8f\u8bfb\u53d6\u4e00\u4e2a\u6587\u4ef6\u65f6\uff0c\u64cd\u4f5c\u7cfb\u7edf\u4f1a\u5c06\u6587\u4ef6\u7684\u5185\u5bb9\u8bfb\u53d6\u5230page cache\u4e2d\uff0c\u5e76\u5c06\u5176\u4fdd\u5b58\u5728\u5185\u5b58\u4e2d\u3002\u4e0b\u6b21\u518d\u8bfb\u53d6\u8be5\u6587\u4ef6\u65f6\uff0c\u64cd\u4f5c\u7cfb\u7edf\u9996\u5148\u68c0\u67e5page cache\u4e2d\u662f\u5426\u5b58\u5728\u8be5\u6587\u4ef6\u7684\u7f13\u5b58\u6570\u636e\uff0c\u5982\u679c\u5b58\u5728\uff0c\u5219\u76f4\u63a5\u4ece\u7f13\u5b58\u4e2d\u8bfb\u53d6\uff0c\u800c\u4e0d\u662f\u518d\u6b21\u8bbf\u95ee\u78c1\u76d8\u3002\u8fd9\u79cd\u673a\u5236\u53ef\u4ee5\u663e\u8457\u63d0\u9ad8\u6587\u4ef6\u8bbf\u95ee\u901f\u5ea6\u3002<\/p>\n

\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684C\u4ee3\u7801\u793a\u4f8b\uff0c\u5c55\u793a\u4e86\u5982\u4f55\u4f7f\u7528\u5185\u5b58\u7f13\u5b58\uff1a<\/p>\n

#include <stdio.h>\n#include <stdlib.h>\n#include <fcntl.h>\n#include <unistd.h>\n#include <sys>\n#include <sys>\n#include <sys>\n\nint main() {\n    int fd;\n    struct stat sb;\n    char *file_data;\n\n    \/\/ \u6253\u5f00\u6587\u4ef6\n    fd = open(\"test.txt\", O_RDONLY);\n    if (fd == -1) {\n        perror(\"open\");\n        exit(1);\n    }\n\n    \/\/ \u83b7\u53d6\u6587\u4ef6\u5927\u5c0f\n    if (fstat(fd, &amp;sb) == -1) {\n        perror(\"fstat\");\n        exit(1);\n    }\n\n    \/\/ \u5c06\u6587\u4ef6\u6620\u5c04\u5230\u5185\u5b58\u4e2d\n    file_data = mmap(NULL, sb.st_size, PROT_READ, MAP_PRIVATE, fd, 0);\n    if (file_data == MAP_FAILED) {\n        perror(\"mmap\");\n        exit(1);\n    }\n\n    \/\/ \u901a\u8fc7\u5185\u5b58\u8bbf\u95ee\u6587\u4ef6\u5185\u5bb9\n    printf(\"%s\", file_data);\n\n    \/\/ \u89e3\u9664\u5185\u5b58\u6620\u5c04\n    if (munmap(file_data, sb.st_size) == -1) {\n        perror(\"munmap\");\n        exit(1);\n    }\n\n    \/\/ \u5173\u95ed\u6587\u4ef6\n    close(fd);\n\n    return 0;\n}<\/sys><\/sys><\/sys><\/unistd.h><\/fcntl.h><\/stdlib.h><\/stdio.h><\/pre>\n
  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
\u4e0a\u8ff0\u4ee3\u7801\u4f7f\u7528\u4e86mmap\u51fd\u6570\u5c06\u6587\u4ef6\u6620\u5c04\u5230\u5185\u5b58\u4e2d\uff0c\u5e76\u901a\u8fc7\u6307\u9488file_data\u8bbf\u95ee\u6587\u4ef6\u5185\u5bb9\u3002\u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\uff0c\u6587\u4ef6\u7684\u5185\u5bb9\u5c06\u88ab\u7f13\u5b58\u5728\u5185\u5b58\u4e2d\uff0c\u4e0b\u6b21\u8bbf\u95ee\u65f6\u53ef\u4ee5\u76f4\u63a5\u8bfb\u53d6\u6587\u4ef6\u5185\u5bb9\uff0c\u800c\u4e0d\u9700\u8981\u518d\u6b21\u8bbf\u95ee\u78c1\u76d8\u3002<\/p>\n
\u4e8c\u3001\u78c1\u76d8\u7f13\u5b58<\/p>\n
\u9664\u4e86\u5185\u5b58\u7f13\u5b58\u5916\uff0cLinux\u7cfb\u7edf\u8fd8\u6709\u4e00\u4e2a\u91cd\u8981\u7684\u7f13\u5b58\u673a\u5236\u662f\u78c1\u76d8\u7f13\u5b58\u3002\u78c1\u76d8\u7f13\u5b58\u662f\u6307Linux\u4f7f\u7528\u4e00\u90e8\u5206\u5185\u5b58\u4f5c\u4e3a\u78c1\u76d8I\/O\u7684\u7f13\u5b58\uff0c\u4ee5\u63d0\u9ad8\u78c1\u76d8\u8bbf\u95ee\u7684\u6027\u80fd\u3002\u5f53\u5e94\u7528\u7a0b\u5e8f\u8fdb\u884c\u78c1\u76d8\u8bfb\u5199\u64cd\u4f5c\u65f6\uff0c\u64cd\u4f5c\u7cfb\u7edf\u4f1a\u9996\u5148\u5c06\u6570\u636e\u7f13\u5b58\u5728\u5185\u5b58\u4e2d\uff0c\u7136\u540e\u518d\u5c06\u6570\u636e\u5199\u5165\u78c1\u76d8\u3002\u8fd9\u79cd\u673a\u5236\u53ef\u4ee5\u51cf\u5c11\u5bf9\u78c1\u76d8\u7684\u9891\u7e41\u8bbf\u95ee\uff0c\u63d0\u9ad8\u78c1\u76d8\u7684\u8bfb\u5199\u6548\u7387\u3002<\/p>\n
\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684C\u4ee3\u7801\u793a\u4f8b\uff0c\u5c55\u793a\u4e86\u5982\u4f55\u4f7f\u7528\u78c1\u76d8\u7f13\u5b58\uff1a<\/p>\n
#include <stdio.h>\n#include <stdlib.h>\n#include <fcntl.h>\n#include <unistd.h>\n\nint main() {\n    int fd;\n    char buffer[512];\n\n    \/\/ \u6253\u5f00\u6587\u4ef6\n    fd = open(\"test.txt\", O_WRONLY | O_CREAT, S_IRUSR | S_IWUSR);\n    if (fd == -1) {\n        perror(\"open\");\n        exit(1);\n    }\n\n    \/\/ \u5199\u5165\u6587\u4ef6\n    write(fd, buffer, sizeof(buffer));\n\n    \/\/ \u5237\u65b0\u6587\u4ef6\u7f13\u51b2\n    fsync(fd);\n\n    \/\/ \u5173\u95ed\u6587\u4ef6\n    close(fd);\n\n    return 0;\n}<\/unistd.h><\/fcntl.h><\/stdlib.h><\/stdio.h><\/pre>\n
  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
\u4e0a\u8ff0\u4ee3\u7801\u4f7f\u7528\u4e86write\u51fd\u6570\u5c06\u6570\u636e\u5199\u5165\u6587\u4ef6\uff0c\u5e76\u901a\u8fc7fsync\u51fd\u6570\u5237\u65b0\u6587\u4ef6\u7f13\u51b2\u3002\u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\uff0c\u6570\u636e\u4f1a\u9996\u5148\u88ab\u7f13\u5b58\u5728\u5185\u5b58\u4e2d\uff0c\u7136\u540e\u518d\u7edf\u4e00\u5199\u5165\u78c1\u76d8\u3002\u8fd9\u79cd\u673a\u5236\u53ef\u4ee5\u663e\u8457\u63d0\u9ad8\u78c1\u76d8\u7684\u5199\u5165\u6027\u80fd\u3002<\/p>\n
\u4e09\u3001\u6587\u4ef6\u7cfb\u7edf\u7f13\u5b58<\/p>\n
\u6587\u4ef6\u7cfb\u7edf\u7f13\u5b58\u662f\u6307Linux\u7cfb\u7edf\u4e2d\u7684\u6587\u4ef6\u7cfb\u7edf\u4f7f\u7528\u7684\u7f13\u5b58\uff0c\u7528\u4e8e\u52a0\u901f\u6587\u4ef6\u7cfb\u7edf\u7684\u8bbf\u95ee\u3002\u6587\u4ef6\u7cfb\u7edf\u7f13\u5b58\u4e3b\u8981\u7531\u6587\u4ef6\u7cfb\u7edf\u6570\u636e\u7ed3\u6784\u548c\u5143\u6570\u636e\uff08\u5982\u6587\u4ef6\u6743\u9650\u3001\u521b\u5efa\u65f6\u95f4\u7b49\uff09\u7ec4\u6210\u3002\u5f53\u5e94\u7528\u7a0b\u5e8f\u8fdb\u884c\u6587\u4ef6\u7cfb\u7edf\u64cd\u4f5c\u65f6\uff0c\u64cd\u4f5c\u7cfb\u7edf\u4f1a\u5c06\u76f8\u5173\u6570\u636e\u7f13\u5b58\u5728\u5185\u5b58\u4e2d\uff0c\u4ee5\u63d0\u9ad8\u6587\u4ef6\u7cfb\u7edf\u7684\u8bbf\u95ee\u901f\u5ea6\u3002<\/p>\n
\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684C\u4ee3\u7801\u793a\u4f8b\uff0c\u5c55\u793a\u4e86\u5982\u4f55\u4f7f\u7528\u6587\u4ef6\u7cfb\u7edf\u7f13\u5b58\uff1a<\/p>\n
#include <stdio.h>\n#include <stdlib.h>\n#include <fcntl.h>\n#include <unistd.h>\n#include <sys>\n#include <sys>\n\nint main() {\n    int fd;\n\n    \/\/ \u6253\u5f00\u6587\u4ef6\n    fd = open(\"test.txt\", O_RDONLY);\n    if (fd == -1) {\n        perror(\"open\");\n        exit(1);\n    }\n\n    \/\/ \u4fee\u6539\u6587\u4ef6\u6743\u9650\n    if (fchmod(fd, S_IRUSR | S_IWUSR) == -1) {\n        perror(\"fchmod\");\n        exit(1);\n    }\n\n    \/\/ \u5173\u95ed\u6587\u4ef6\n    close(fd);\n\n    return 0;\n}<\/sys><\/sys><\/unistd.h><\/fcntl.h><\/stdlib.h><\/stdio.h><\/pre>\n
  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
\u4e0a\u8ff0\u4ee3\u7801\u4f7f\u7528\u4e86fchmod\u51fd\u6570\u4fee\u6539\u6587\u4ef6\u7684\u6743\u9650\u3002\u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\uff0c\u6587\u4ef6\u7684\u76f8\u5173\u4fe1\u606f\u4f1a\u88ab\u7f13\u5b58\u5728\u5185\u5b58\u4e2d\uff0c\u5728\u540e\u7eed\u7684\u6587\u4ef6\u8bbf\u95ee\u4e2d\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528\uff0c\u63d0\u9ad8\u4e86\u6587\u4ef6\u64cd\u4f5c\u7684\u6548\u7387\u3002<\/p>\n
\u7ed3\u8bed\uff1a<\/p>\n
\u672c\u6587\u6df1\u5165\u63a2\u8ba8\u4e86Linux\u4e2d\u7684\u4e09\u79cd\u7f13\u5b58\u673a\u5236\uff1a\u5185\u5b58\u7f13\u5b58\u3001\u78c1\u76d8\u7f13\u5b58\u548c\u6587\u4ef6\u7cfb\u7edf\u7f13\u5b58\uff0c\u5e76\u63d0\u4f9b\u4e86\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\u3002\u901a\u8fc7\u4e86\u89e3\u548c\u4f7f\u7528\u8fd9\u4e9b\u7f13\u5b58\u673a\u5236\uff0c\u53ef\u4ee5\u63d0\u9ad8\u7cfb\u7edf\u7684\u6027\u80fd\uff0c\u5e76\u52a0\u5feb\u6570\u636e\u8bbf\u95ee\u901f\u5ea6\u3002\u5e0c\u671b\u672c\u6587\u5bf9\u8bfb\u8005\u4eec\u7406\u89e3\u548c\u5e94\u7528Linux\u7f13\u5b58\u673a\u5236\u6709\u6240\u5e2e\u52a9\u3002<\/p>\n
\u4ee5\u4e0a\u5c31\u662f\u63a2\u7d22Linux\u7f13\u5b58\u673a\u5236\uff1a\u5185\u5b58\u3001\u78c1\u76d8\u548c\u6587\u4ef6\u7cfb\u7edf\u7684\u7f13\u5b58\u8be6\u89e3\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8FDCServers\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
\u6df1\u5165\u4e86\u89e3Linux\u7f13\u5b58\u673a\u5236\uff1a\u5185\u5b58\u7f13\u5b58\u3001\u78c1\u76d8\u7f13\u5b58\u548c\u6587\u4ef6\u7cfb\u7edf\u7f13\u5b58 \u5bfc\u8bfb\uff1a\u5728Linux\u7cfb\u7edf\u4e2d\uff0c\u7f13\u5b58\u662f\u4e00\u79cd\u91cd\u8981\u7684\u673a\u5236\uff0c\u7528\u4e8e\u52a0\u901f\u6570\u636e\u8bbf\u95ee\u548c\u63d0\u9ad8\u7cfb\u7edf\u6027\u80fd\u3002\u672c\u6587\u5c06\u6df1\u5165\u63a2\u8ba8Linux\u4e2d\u7684\u4e09\u79cd\u7f13\u5b58\u673a\u5236\uff1a\u5185\u5b58\u7f13\u5b58\u3001\u78c1\u76d8\u7f13\u5b58\u548c\u6587\u4ef6\u7cfb\u7edf\u7f13\u5b58\uff0c\u5e76\u63d0\u4f9b\u5177\u4f53\u4ee3\u7801\u793a\u4f8b\uff0c\u4ee5\u5e2e\u52a9\u8bfb\u8005\u66f4\u597d\u5730\u7406\u89e3\u548c\u4f7f\u7528\u8fd9\u4e9b\u7f13\u5b58\u673a\u5236\u3002 \u4e00\u3001\u5185\u5b58\u7f13\u5b58 \u5185\u5b58\u7f13\u5b58\u662f\u6307Linux\u7cfb\u7edf\u5c06\u78c1\u76d8\u4e0a\u7684\u6587\u4ef6\u6570\u636e\u7f13\u5b58\u5728\u5185\u5b58\u4e2d\uff0c\u4ee5\u51cf\u5c11\u5bf9\u78c1\u76d8\u7684\u9891\u7e41\u8bfb\u5199\uff0c\u4ece\u800c\u52a0\u5feb\u6570\u636e\u8bbf\u95ee\u901f\u5ea6\u3002Linux\u7cfb\u7edf\u4e2d\u7684\u5185\u5b58\u7f13\u5b58\u4e3b\u8981\u7531page cache\u7ec4\u6210\u3002\u5f53\u5e94\u7528\u7a0b\u5e8f\u8bfb\u53d6\u4e00\u4e2a\u6587\u4ef6\u65f6\uff0c\u64cd\u4f5c\u7cfb\u7edf\u4f1a\u5c06\u6587\u4ef6\u7684\u5185\u5bb9\u8bfb\u53d6\u5230page cache\u4e2d\uff0c\u5e76\u5c06\u5176\u4fdd\u5b58\u5728\u5185\u5b58\u4e2d\u3002\u4e0b\u6b21\u518d\u8bfb\u53d6\u8be5\u6587\u4ef6\u65f6\uff0c\u64cd\u4f5c\u7cfb\u7edf\u9996\u5148\u68c0\u67e5page cache\u4e2d\u662f\u5426\u5b58\u5728\u8be5\u6587\u4ef6\u7684\u7f13\u5b58\u6570\u636e\uff0c\u5982\u679c\u5b58\u5728\uff0c\u5219\u76f4\u63a5\u4ece\u7f13\u5b58\u4e2d\u8bfb\u53d6\uff0c\u800c\u4e0d\u662f\u518d\u6b21\u8bbf\u95ee\u78c1\u76d8\u3002\u8fd9\u79cd\u673a\u5236\u53ef\u4ee5\u663e\u8457\u63d0\u9ad8\u6587\u4ef6\u8bbf\u95ee\u901f\u5ea6\u3002 \u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684C\u4ee3\u7801\u793a\u4f8b\uff0c\u5c55\u793a\u4e86\u5982\u4f55\u4f7f\u7528\u5185\u5b58\u7f13\u5b58\uff1a #include <stdio.h> #include <stdlib.h> #include <fcntl.h> #include <unistd.h> #include <sys> #include <sys> #include <sys> int main() { int fd; struct stat sb; char *file_data; \/\/ \u6253\u5f00\u6587\u4ef6 fd = open(“test.txt”, O_RDONLY); if (fd == -1) { perror(“open”); exit(1); } \/\/ \u83b7\u53d6\u6587\u4ef6\u5927\u5c0f if (fstat(fd, &amp;sb) == -1) { perror(“fstat”); […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-62867","post","type-post","status-publish","format-standard","hentry","category-os"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/62867","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=62867"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/62867\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=62867"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=62867"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=62867"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}