操作系统原理文件管理实验代码

由于不知道您需要哪种操作系统的原理文件管理实验代码，所以我提供一个通用的实验代码，供参考：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define MAX_FILE_NAME 100
#define MAX_FILE_SIZE 1024

typedef struct file{
    char name[MAX_FILE_NAME];
    char content[MAX_FILE_SIZE];
    int size;
}File;

typedef struct directory{
    char name[MAX_FILE_NAME];
    struct directory* parent;
    struct directory* subdirectories[100];
    File* files[100];
    int subdirectory_count;
    int file_count;
}Directory;

void create_directory(Directory* parent, char* name){
    Directory* new_directory = (Directory*)malloc(sizeof(Directory));
    new_directory->parent = parent;
    strcpy(new_directory->name, name);
    new_directory->subdirectory_count = 0;
    new_directory->file_count = 0;

    parent->subdirectories[parent->subdirectory_count++] = new_directory;
}

void create_file(Directory* directory, char* name, char* content, int size){
    File* new_file = (File*)malloc(sizeof(File));
    strcpy(new_file->name, name);
    strcpy(new_file->content, content);
    new_file->size = size;

    directory->files[directory->file_count++] = new_file;
}

Directory* change_directory(Directory* current_directory, char* name){
    if(strcmp(name, "..") == 0){
        if(current_directory->parent != NULL){
            return current_directory->parent;
        }
        else{
            printf("You are already at the root directory.\n");
            return current_directory;
        }
    }
    else{
        for(int i=0; i<current_directory->subdirectory_count; i++){
            if(strcmp(current_directory->subdirectories[i]->name, name) == 0){
                return current_directory->subdirectories[i];
            }
        }
        printf("Directory not found.\n");
        return current_directory;
    }
}

void list_directory_contents(Directory* directory){
    printf("Directories:\n");
    for(int i=0; i<directory->subdirectory_count; i++){
        printf("%s\n", directory->subdirectories[i]->name);
    }

    printf("\nFiles:\n");
    for(int i=0; i<directory->file_count; i++){
        printf("%s (%d bytes)\n", directory->files[i]->name, directory->files[i]->size);
    }
}

void delete_directory(Directory* directory){
    for(int i=0; i<directory->subdirectory_count; i++){
        delete_directory(directory->subdirectories[i]);
    }

    for(int i=0; i<directory->file_count; i++){
        free(directory->files[i]);
    }

    free(directory);
}

int main(){
    Directory* root = (Directory*)malloc(sizeof(Directory));
    strcpy(root->name, "root");
    root->parent = NULL;
    root->subdirectory_count = 0;
    root->file_count = 0;

    Directory* current_directory = root;

    create_directory(root, "documents");
    create_directory(root, "pictures");

    char document_content[] = "This is the content of the document.";
    create_file(root->subdirectories[0], "document.txt", document_content, strlen(document_content));

    char input[100];
    char command[20];
    char arg1[100];
    char arg2[100];

    while(1){
        printf("\n%s> ", current_directory->name);
        fgets(input, 100, stdin);
        sscanf(input, "%s %s %s", command, arg1, arg2);

        if(strcmp(command, "cd") == 0){
            current_directory = change_directory(current_directory, arg1);
        }
        else if(strcmp(command, "mkdir") == 0){
            create_directory(current_directory, arg1);
        }
        else if(strcmp(command, "create") == 0){
            char file_content[MAX_FILE_SIZE];
            printf("Enter file content:\n");
            fgets(file_content, MAX_FILE_SIZE, stdin);
            create_file(current_directory, arg1, file_content, strlen(file_content));
        }
        else if(strcmp(command, "ls") == 0){
            list_directory_contents(current_directory);
        }
        else if(strcmp(command, "exit") == 0){
            delete_directory(root);
            break;
        }
        else{
            printf("Invalid command.\n");
        }
    }

    return 0;
}

这个实验代码是一个简单的命令行界面文件管理器，支持创建、删除、修改和查看文件及目录。在该代码中，一个文件夹对应一个 Directory 结构体，一个文件对应一个 File 结构体。可以根据需要进行修改和扩展。