rollback.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "rollback.h"
#include "utils.h"

// 定义备份文件路径
#define BACKUP_FILE "backup_system_state.dat"
#define SYSTEM_STATE_FILE "system_state.dat"

// 模拟从备份文件恢复系统状态
int restore_backup() {
    FILE *backup = fopen(BACKUP_FILE, "rb");
    FILE *system_state = fopen(SYSTEM_STATE_FILE, "wb");

    if (backup == NULL || system_state == NULL) {
        log_message("Error opening backup or system state file.");
        if (backup != NULL) fclose(backup);
        if (system_state != NULL) fclose(system_state);
        return 0;
    }

    char buffer[1024];
    size_t bytes;
    while ((bytes = fread(buffer, 1, sizeof(buffer), backup)) > 0) {
        fwrite(buffer, 1, bytes, system_state);
    }

    fclose(backup);
    fclose(system_state);
    return 1;
}

// 检查系统状态是否有效
int check_system_state() {
    // 在这里添加具体的系统状态检查逻辑
    // 例如，检查文件是否存在，配置是否正确等

    FILE *system_state = fopen(SYSTEM_STATE_FILE, "r");
    if (system_state == NULL) {
        log_message("System state file not found.");
        return 0;
    }
    fclose(system_state);
    return 1;
}

int rollback_system() {
    log_message("Starting system rollback...");

    if (!check_system_state()) {
        log_message("Current system state is invalid. Attempting to restore from backup...");
        if (restore_backup()) {
            log_message("System state restored from backup.");
        } else {
            log_message("Failed to restore system state from backup.");
            return 0;
        }
    }

    // 在这里添加其他回滚步骤，例如重启服务、恢复配置等
    log_message("Performing additional rollback steps...");

    // 模拟回滚过程
    int success = 1; // 1 表示成功，0 表示失败

    if (success) {
        log_message("System rollback completed.");
        return 1;
    } else {