尊龙凯时人生就是搏

̽ÌÖLinux MBRµÄ×÷ÓÃ

Linux MBR£¨Master Boot Record£¬Ö÷Ö¸µ¼¼Í¼£©ÊÇ´æ´¢ÔÚÓ²ÅÌÉϵÚÒ»¸öÉÈÇøµÄÌØÊâÖ¸µ¼¼Í¼£¬ÓÃÓÚÆô¶¯ÅÌËã»ú²¢¼ÓÔزÙ×÷ϵͳ¡£ÏàʶLinux MBRµÄ¹¦Ð§¹ØÓÚÉîÈëÃ÷È·ÅÌËã»úÖ¸µ¼Àú³ÌºÍ²Ù×÷ϵͳ¼ÓÔØÀú³ÌºÜÊÇÖ÷Òª¡£±¾ÎĽ«ÏÈÈÝLinux MBRµÄ¹¦Ð§£¬²¢ÌṩÏêϸµÄ´úÂëʾÀýÀ´×ÊÖú¶ÁÕ߸üºÃµØÃ÷È·¡£

1. Linux MBRµÄ¸ÅÊö

Linux MBR°üÀ¨Á½²¿·ÖÐÅÏ¢£ºÖ÷Ö¸µ¼´úÂëºÍ·ÖÇø±í¡£Ö÷Ö¸µ¼´úÂëÊÇÒ»¸öСµÄ³ÌÐò£¬ÈÏÕæÆô¶¯Ö¸µ¼Àú³Ì£¬²¢½«¿ØÖÆȨת½»¸ø²Ù×÷ϵͳµÄÖ¸µ¼³ÌÐò¡£·ÖÇø±í¼Í¼ÁËÓ²ÅÌ·ÖÇøµÄÐÅÏ¢£¬°üÀ¨Ã¿¸ö·ÖÇøµÄÆðʼλÖᢾÞϸºÍ·ÖÇøÀàÐ͵È¡£

2. Linux MBRµÄ¹¦Ð§

1. Æô¶¯ÅÌËã»ú

µ±ÅÌËã»ú¿ª»úʱ£¬BIOS»áÊ×ÏȼÓÔØÓ²ÅÌÉϵĵÚÒ»¸öÉÈÇø£¨¼´Linux MBR£©£¬²¢Ö´ÐÐÆäÖеÄÖ¸µ¼´úÂë¡£Ö¸µ¼´úÂë»á³õʼ»¯ÏµÍ³ÇéÐβ¢¼ÓÔزÙ×÷ϵͳµÄÖ¸µ¼³ÌÐò¡£

2. ¼ÓÔزÙ×÷ϵͳ

Linux MBR»á¶ÁÈ¡·ÖÇø±íÐÅÏ¢£¬²¢Æ¾Ö¤ÆäÖмͼµÄ·ÖÇøÐÅÏ¢ÕÒµ½²Ù×÷ϵͳËùÔڵķÖÇø£¬²¢½«¿ØÖÆȨ½»¸ø¸Ã·ÖÇøÖеÄÖ¸µ¼³ÌÐò£¨ÈçGRUB»òLILO£©¡£Ö¸µ¼³ÌÐò»á¼ÌÐø¼ÓÔزÙ×÷ϵͳµÄÄں˺ÍÎļþϵͳ£¬×îÖÕÍê³ÉϵͳµÄÆô¶¯Àú³Ì¡£

3. Ïêϸ´úÂëʾÀý

ÏÂÃæÊÇÒ»¸ö¼òÆÓµÄʾÀý´úÂ룬ÑÝʾÔõÑù¶ÁÈ¡Linux MBRÖеķÖÇø±íÐÅÏ¢£º

#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>

#define SECTOR_SIZE 512
#define PARTITION_TABLE_OFFSET 446
#define PARTITION_TABLE_ENTRY_SIZE 16

int main() {
    int fd = open("/dev/sda", O_RDONLY);
    if (fd == -1) {
        perror("open");
        return 1;
    }

    unsigned char mbr[SECTOR_SIZE];
    if (read(fd, mbr, SECTOR_SIZE) != SECTOR_SIZE) {
        perror("read");
        close(fd);
        return 1;
    }

    unsigned char* partitionTable = mbr + PARTITION_TABLE_OFFSET;
    for (int i = 0; i < 4; i++) {
        printf("Partition %d:
", i+1);
        printf("Status: %02x
", partitionTable[i*PARTITION_TABLE_ENTRY_SIZE]);
        // Êä³ö¸ü¶à·ÖÇøÐÅÏ¢£¬ÈçÆðʼλÖᢷÖÇøÀàÐ͵È
    }

    close(fd);
    return 0;
}

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½áÓï

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