Magic Number 在 Linux 引导加载中的作用是什么 [关闭]

Magic Number在Linux引导加载中的作用

c
#include 
typedef struct {
    unsigned char magic[4];
    // Other fields in the ELF header...
} ElfHeader;
int main() {
    ElfHeader elfHeader;
    // Read the first 4 bytes of the file into the magic field
    FILE *file = fopen("kernel.elf", "rb");
    fread(elfHeader.magic, 1, 4, file);
    fclose(file);
    // Check if the magic number is equal to the ELF magic number
    if (elfHeader.magic[0] == 0x7F && elfHeader.magic[1] == 'E' && elfHeader.magic[2] == 'L' && elfHeader.magic[3] == 'F') {
        printf("ELF Magic Number is present. It's an ELF file.%
");
    } else {
        printf("This is not an ELF file.%
");
    }
    return 0;
}