{"id":63153,"date":"2025-04-29T09:51:01","date_gmt":"2025-04-29T01:51:01","guid":{"rendered":"https:\/\/fwq.ai\/blog\/63153\/"},"modified":"2025-04-29T09:51:01","modified_gmt":"2025-04-29T01:51:01","slug":"%e6%8e%a2%e7%b4%a2linux-ext2%e6%96%87%e4%bb%b6%e7%b3%bb%e7%bb%9f%e4%b8%ad%e7%9a%84%e7%a3%81%e7%9b%98%e5%ad%98%e5%82%a8%e6%9c%ba%e5%88%b6-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/63153\/","title":{"rendered":"\u63a2\u7d22Linux ext2\u6587\u4ef6\u7cfb\u7edf\u4e2d\u7684\u78c1\u76d8\u5b58\u50a8\u673a\u5236"},"content":{"rendered":"

\"\u63a2\u7d22Linux<\/p>\n

\u5728\u8ba1\u7b97\u673a\u79d1\u5b66\u9886\u57df\uff0c\u6587\u4ef6\u7cfb\u7edf\u662f\u64cd\u4f5c\u7cfb\u7edf\u7528\u6765\u7ba1\u7406\u548c\u7ec4\u7ec7\u5b58\u50a8\u8bbe\u5907\u4e0a\u6587\u4ef6\u7684\u4e00\u79cd\u673a\u5236\u3002\u5176\u4e2d\uff0cext2\u6587\u4ef6\u7cfb\u7edf\u662fLinux\u64cd\u4f5c\u7cfb\u7edf\u6700\u65e9\u4f7f\u7528\u7684\u4e00\u79cd\u6587\u4ef6\u7cfb\u7edf\uff0c\u5b83\u91c7\u7528\u57fa\u4e8e\u78c1\u76d8\u7684\u5b58\u50a8\u673a\u5236\u6765\u7ba1\u7406\u6587\u4ef6\u6570\u636e\u548c\u5143\u6570\u636e\uff0c\u662fLinux\u7cfb\u7edf\u4e2d\u8f83\u4e3a\u7ecf\u5178\u7684\u6587\u4ef6\u7cfb\u7edf\u4e4b\u4e00\u3002\u672c\u6587\u5c06\u6df1\u5165\u63a2\u7d22Linux ext2\u6587\u4ef6\u7cfb\u7edf\u4e2d\u7684\u78c1\u76d8\u5b58\u50a8\u673a\u5236\uff0c\u5305\u62ec\u78c1\u76d8\u5206\u533a\u3001\u7ec4\u63cf\u8ff0\u7b26\u3001\u7d22\u5f15\u8282\u70b9\u3001\u6570\u636e\u5757\u7b49\u5173\u952e\u6982\u5ff5\uff0c\u5e76\u63d0\u4f9b\u76f8\u5e94\u7684\u4ee3\u7801\u793a\u4f8b\u8fdb\u884c\u89e3\u6790\u3002<\/p>\n

1. \u78c1\u76d8\u5206\u533a<\/h3>\n

\u5728Linux\u7cfb\u7edf\u4e2d\uff0c\u78c1\u76d8\u901a\u5e38\u4f1a\u88ab\u5206\u4e3a\u591a\u4e2a\u5206\u533a\u6765\u5b58\u50a8\u4e0d\u540c\u7c7b\u578b\u7684\u6570\u636e\u3002\u5728\u4f7f\u7528ext2\u6587\u4ef6\u7cfb\u7edf\u65f6\uff0c\u78c1\u76d8\u662f\u6309\u7167\u5757\uff08block\uff09\u4e3a\u5355\u4f4d\u8fdb\u884c\u7ba1\u7406\u7684\u3002\u6bcf\u4e2a\u5757\u7684\u5927\u5c0f\u5728\u4e0d\u540c\u7684\u7cfb\u7edf\u4e0a\u53ef\u80fd\u4f1a\u6709\u6240\u4e0d\u540c\uff0c\u4f46\u901a\u5e38\u662f4KB\u3002\u78c1\u76d8\u4e0a\u7684\u5757\u53ef\u4ee5\u6839\u636e\u9700\u8981\u5206\u914d\u7ed9\u4e0d\u540c\u7684\u6587\u4ef6\u6216\u76ee\u5f55\u8fdb\u884c\u6570\u636e\u5b58\u50a8\u3002<\/p>\n

2. \u7ec4\u63cf\u8ff0\u7b26<\/h3>\n

\u5728ext2\u6587\u4ef6\u7cfb\u7edf\u4e2d\uff0c\u6bcf\u4e2a\u5206\u533a\u88ab\u5206\u6210\u82e5\u5e72\u4e2a\u7ec4\uff08block group\uff09\uff0c\u6bcf\u4e2a\u7ec4\u5305\u542b\u4e00\u5b9a\u6570\u91cf\u7684\u5757\u3002\u6bcf\u4e2a\u7ec4\u90fd\u6709\u5bf9\u5e94\u7684\u7ec4\u63cf\u8ff0\u7b26\uff0c\u7528\u4e8e\u63cf\u8ff0\u7ec4\u7684\u4e00\u4e9b\u57fa\u672c\u4fe1\u606f\uff0c\u6bd4\u5982\u7ec4\u4e2d\u7684\u7a7a\u95f2\u5757\u6570\u91cf\u3001\u7d22\u5f15\u8282\u70b9\u6570\u91cf\u7b49\u3002\u7ec4\u63cf\u8ff0\u7b26\u901a\u5e38\u5b58\u50a8\u5728\u78c1\u76d8\u4e0a\uff0c\u901a\u8fc7\u8bfb\u53d6\u7ec4\u63cf\u8ff0\u7b26\u53ef\u4ee5\u83b7\u53d6\u7ec4\u7684\u76f8\u5173\u4fe1\u606f\u3002<\/p>\n

\u4e0b\u9762\u662f\u4e00\u4e2a\u7b80\u5355\u7684C\u4ee3\u7801\u793a\u4f8b\uff0c\u7528\u4e8e\u8bfb\u53d6ext2\u6587\u4ef6\u7cfb\u7edf\u4e2d\u7684\u7ec4\u63cf\u8ff0\u7b26\uff1a<\/p>\n

#include <stdio.h>\n#include <fcntl.h>\n#include <ext2fs>\n\nint main() {\n    int fd = open(\"\/dev\/sda1\", O_RDONLY);\n\n    struct ext2_group_desc groupDesc;\n    lseek(fd, 2048, SEEK_SET);  \/\/ \u5047\u8bbe\u7ec4\u63cf\u8ff0\u7b26\u5728\u78c1\u76d8\u4e0a\u7684\u504f\u79fb\u91cf\u4e3a2048\n    read(fd, &amp;groupDesc, sizeof(struct ext2_group_desc));\n\n    printf(\"Group Descriptor Info:\n\");\n    printf(\"Number of free blocks: %u\n\", groupDesc.bg_free_blocks_count);\n    printf(\"Number of free inodes: %u\n\", groupDesc.bg_free_inodes_count);\n\n    close(fd);\n    return 0;\n}<\/ext2fs><\/fcntl.h><\/stdio.h><\/pre>\n
  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
3. \u7d22\u5f15\u8282\u70b9<\/h3>\n
ext2\u6587\u4ef6\u7cfb\u7edf\u4e2d\u7684\u7d22\u5f15\u8282\u70b9\uff08inode\uff09\u7528\u4e8e\u5b58\u50a8\u6587\u4ef6\u7684\u5143\u6570\u636e\uff0c\u5305\u62ec\u6587\u4ef6\u7684\u6743\u9650\u3001\u6240\u6709\u8005\u3001\u5927\u5c0f\u3001\u8bbf\u95ee\u65f6\u95f4\u3001\u4fee\u6539\u65f6\u95f4\u7b49\u4fe1\u606f\u3002\u6bcf\u4e2a\u6587\u4ef6\u5728ext2\u6587\u4ef6\u7cfb\u7edf\u4e2d\u90fd\u6709\u5bf9\u5e94\u7684\u7d22\u5f15\u8282\u70b9\uff0c\u53ef\u4ee5\u901a\u8fc7\u7d22\u5f15\u8282\u70b9\u6765\u67e5\u627e\u6587\u4ef6\u7684\u5b9e\u9645\u6570\u636e\u5757\u3002<\/p>\n
\u4e0b\u9762\u662f\u4e00\u4e2a\u7b80\u5355\u7684C\u4ee3\u7801\u793a\u4f8b\uff0c\u7528\u4e8e\u8bfb\u53d6\u6587\u4ef6\u7684\u7d22\u5f15\u8282\u70b9\u4fe1\u606f\uff1a<\/p>\n
#include <stdio.h>\n#include <fcntl.h>\n#include <ext2fs>\n\nint main() {\n    int fd = open(\"\/dev\/sda1\", O_RDONLY);\n\n    struct ext2_inode inode;\n    lseek(fd, 1024 * 3, SEEK_SET);  \/\/ \u5047\u8bbe\u7b2c\u4e00\u4e2a\u7d22\u5f15\u8282\u70b9\u5728\u78c1\u76d8\u4e0a\u7684\u504f\u79fb\u91cf\u4e3a3072\n    read(fd, &amp;inode, sizeof(struct ext2_inode));\n\n    printf(\"Inode Info:\n\");\n    printf(\"File size: %d bytes\n\", inode.i_size);\n    printf(\"Owner: %d\n\", inode.i_uid);\n    printf(\"Permission: %o\n\", inode.i_mode);\n\n    close(fd);\n    return 0;\n}<\/ext2fs><\/fcntl.h><\/stdio.h><\/pre>\n
  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
4. \u6570\u636e\u5757<\/h3>\n
\u6570\u636e\u5757\u662fext2\u6587\u4ef6\u7cfb\u7edf\u4e2d\u7528\u4e8e\u5b58\u50a8\u6587\u4ef6\u5b9e\u9645\u6570\u636e\u7684\u5355\u4f4d\u3002\u6bcf\u4e2a\u6587\u4ef6\u4f1a\u7531\u4e00\u4e2a\u6216\u591a\u4e2a\u6570\u636e\u5757\u7ec4\u6210\uff0c\u8fd9\u4e9b\u6570\u636e\u5757\u5206\u5e03\u5728\u78c1\u76d8\u4e0a\u7684\u4e0d\u540c\u4f4d\u7f6e\uff0c\u901a\u8fc7\u7d22\u5f15\u8282\u70b9\u4e2d\u7684\u6570\u636e\u5757\u6307\u9488\u53ef\u4ee5\u627e\u5230\u8fd9\u4e9b\u6570\u636e\u5757\u3002<\/p>\n
\u4e0b\u9762\u662f\u4e00\u4e2a\u7b80\u5355\u7684C\u4ee3\u7801\u793a\u4f8b\uff0c\u7528\u4e8e\u8bfb\u53d6\u6587\u4ef6\u7684\u6570\u636e\u5757\u4fe1\u606f\uff1a<\/p>\n
#include <stdio.h>\n#include <fcntl.h>\n#include <ext2fs>\n\nint main() {\n    int fd = open(\"\/dev\/sda1\", O_RDONLY);\n\n    struct ext2_inode inode;\n    lseek(fd, 1024 * 3, SEEK_SET);  \/\/ \u5047\u8bbe\u7b2c\u4e00\u4e2a\u7d22\u5f15\u8282\u70b9\u5728\u78c1\u76d8\u4e0a\u7684\u504f\u79fb\u91cf\u4e3a3072\n    read(fd, &amp;inode, sizeof(struct ext2_inode));\n\n    printf(\"Data Blocks Info:\n\");\n    for (int i = 0; i <p>\u901a\u8fc7\u4ee5\u4e0a\u4ee3\u7801\u793a\u4f8b\uff0c\u6211\u4eec\u5bf9Linux ext2\u6587\u4ef6\u7cfb\u7edf\u4e2d\u7684\u78c1\u76d8\u5b58\u50a8\u673a\u5236\u6709\u4e86\u66f4\u6df1\u5165\u7684\u4e86\u89e3\u3002\u78c1\u76d8\u5206\u533a\u3001\u7ec4\u63cf\u8ff0\u7b26\u3001\u7d22\u5f15\u8282\u70b9\u4ee5\u53ca\u6570\u636e\u5757\u662f\u6784\u5efaext2\u6587\u4ef6\u7cfb\u7edf\u7684\u5173\u952e\u8981\u7d20\uff0c\u5b83\u4eec\u76f8\u4e92\u914d\u5408\uff0c\u5b9e\u73b0\u4e86\u5bf9\u6587\u4ef6\u6570\u636e\u548c\u5143\u6570\u636e\u7684\u9ad8\u6548\u7ba1\u7406\u548c\u7ec4\u7ec7\u3002\u5bf9\u4e8e\u60f3\u8981\u6df1\u5165\u4e86\u89e3Linux\u6587\u4ef6\u7cfb\u7edf\u7684\u5f00\u53d1\u8005\u6765\u8bf4\uff0c\u638c\u63e1\u8fd9\u4e9b\u6838\u5fc3\u6982\u5ff5\u81f3\u5173\u91cd\u8981\u3002<\/p><\/ext2fs><\/fcntl.h><\/stdio.h><\/pre>\n
  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
\u4ee5\u4e0a\u5c31\u662f\u63a2\u7d22Linux ext2\u6587\u4ef6\u7cfb\u7edf\u4e2d\u7684\u78c1\u76d8\u5b58\u50a8\u673a\u5236\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8FDCServers\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5728\u8ba1\u7b97\u673a\u79d1\u5b66\u9886\u57df\uff0c\u6587\u4ef6\u7cfb\u7edf\u662f\u64cd\u4f5c\u7cfb\u7edf\u7528\u6765\u7ba1\u7406\u548c\u7ec4\u7ec7\u5b58\u50a8\u8bbe\u5907\u4e0a\u6587\u4ef6\u7684\u4e00\u79cd\u673a\u5236\u3002\u5176\u4e2d\uff0cext2\u6587\u4ef6\u7cfb\u7edf\u662fLinux\u64cd\u4f5c\u7cfb\u7edf\u6700\u65e9\u4f7f\u7528\u7684\u4e00\u79cd\u6587\u4ef6\u7cfb\u7edf\uff0c\u5b83\u91c7\u7528\u57fa\u4e8e\u78c1\u76d8\u7684\u5b58\u50a8\u673a\u5236\u6765\u7ba1\u7406\u6587\u4ef6\u6570\u636e\u548c\u5143\u6570\u636e\uff0c\u662fLinux\u7cfb\u7edf\u4e2d\u8f83\u4e3a\u7ecf\u5178\u7684\u6587\u4ef6\u7cfb\u7edf\u4e4b\u4e00\u3002\u672c\u6587\u5c06\u6df1\u5165\u63a2\u7d22Linux ext2\u6587\u4ef6\u7cfb\u7edf\u4e2d\u7684\u78c1\u76d8\u5b58\u50a8\u673a\u5236\uff0c\u5305\u62ec\u78c1\u76d8\u5206\u533a\u3001\u7ec4\u63cf\u8ff0\u7b26\u3001\u7d22\u5f15\u8282\u70b9\u3001\u6570\u636e\u5757\u7b49\u5173\u952e\u6982\u5ff5\uff0c\u5e76\u63d0\u4f9b\u76f8\u5e94\u7684\u4ee3\u7801\u793a\u4f8b\u8fdb\u884c\u89e3\u6790\u3002 1. \u78c1\u76d8\u5206\u533a \u5728Linux\u7cfb\u7edf\u4e2d\uff0c\u78c1\u76d8\u901a\u5e38\u4f1a\u88ab\u5206\u4e3a\u591a\u4e2a\u5206\u533a\u6765\u5b58\u50a8\u4e0d\u540c\u7c7b\u578b\u7684\u6570\u636e\u3002\u5728\u4f7f\u7528ext2\u6587\u4ef6\u7cfb\u7edf\u65f6\uff0c\u78c1\u76d8\u662f\u6309\u7167\u5757\uff08block\uff09\u4e3a\u5355\u4f4d\u8fdb\u884c\u7ba1\u7406\u7684\u3002\u6bcf\u4e2a\u5757\u7684\u5927\u5c0f\u5728\u4e0d\u540c\u7684\u7cfb\u7edf\u4e0a\u53ef\u80fd\u4f1a\u6709\u6240\u4e0d\u540c\uff0c\u4f46\u901a\u5e38\u662f4KB\u3002\u78c1\u76d8\u4e0a\u7684\u5757\u53ef\u4ee5\u6839\u636e\u9700\u8981\u5206\u914d\u7ed9\u4e0d\u540c\u7684\u6587\u4ef6\u6216\u76ee\u5f55\u8fdb\u884c\u6570\u636e\u5b58\u50a8\u3002 2. \u7ec4\u63cf\u8ff0\u7b26 \u5728ext2\u6587\u4ef6\u7cfb\u7edf\u4e2d\uff0c\u6bcf\u4e2a\u5206\u533a\u88ab\u5206\u6210\u82e5\u5e72\u4e2a\u7ec4\uff08block group\uff09\uff0c\u6bcf\u4e2a\u7ec4\u5305\u542b\u4e00\u5b9a\u6570\u91cf\u7684\u5757\u3002\u6bcf\u4e2a\u7ec4\u90fd\u6709\u5bf9\u5e94\u7684\u7ec4\u63cf\u8ff0\u7b26\uff0c\u7528\u4e8e\u63cf\u8ff0\u7ec4\u7684\u4e00\u4e9b\u57fa\u672c\u4fe1\u606f\uff0c\u6bd4\u5982\u7ec4\u4e2d\u7684\u7a7a\u95f2\u5757\u6570\u91cf\u3001\u7d22\u5f15\u8282\u70b9\u6570\u91cf\u7b49\u3002\u7ec4\u63cf\u8ff0\u7b26\u901a\u5e38\u5b58\u50a8\u5728\u78c1\u76d8\u4e0a\uff0c\u901a\u8fc7\u8bfb\u53d6\u7ec4\u63cf\u8ff0\u7b26\u53ef\u4ee5\u83b7\u53d6\u7ec4\u7684\u76f8\u5173\u4fe1\u606f\u3002 \u4e0b\u9762\u662f\u4e00\u4e2a\u7b80\u5355\u7684C\u4ee3\u7801\u793a\u4f8b\uff0c\u7528\u4e8e\u8bfb\u53d6ext2\u6587\u4ef6\u7cfb\u7edf\u4e2d\u7684\u7ec4\u63cf\u8ff0\u7b26\uff1a #include <stdio.h> #include <fcntl.h> #include <ext2fs> int main() { int fd = open(“\/dev\/sda1”, O_RDONLY); struct ext2_group_desc groupDesc; lseek(fd, 2048, SEEK_SET); \/\/ \u5047\u8bbe\u7ec4\u63cf\u8ff0\u7b26\u5728\u78c1\u76d8\u4e0a\u7684\u504f\u79fb\u91cf\u4e3a2048 read(fd, &amp;groupDesc, sizeof(struct ext2_group_desc)); printf(“Group Descriptor Info: “); printf(“Number of free blocks: %u “, groupDesc.bg_free_blocks_count); printf(“Number of free inodes: %u “, groupDesc.bg_free_inodes_count); close(fd); […]<\/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-63153","post","type-post","status-publish","format-standard","hentry","category-os"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/63153","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=63153"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/63153\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=63153"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=63153"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=63153"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}