在C编程中使用win32接口获取所有本地用户及其对给定文件的权限的程序

#include <stdio.h>
#include <windows.h>
#include <aclapi.h>

void GetFilePermissions(const char* filename) {
    DWORD dwRes;
    PSECURITY_DESCRIPTOR pSD = NULL;
    PACL pDacl = NULL;
    PSID pSidOwner = NULL;
    PSID pSidGroup = NULL;
    BOOL bOwnerDefaulted = FALSE;
    BOOL bGroupDefaulted = FALSE;
    DWORD dwAclSize;
    DWORD dwAceCount;
    LPSTR pszUserName = NULL;

    // 获取文件的安全描述符
    dwRes = GetNamedSecurityInfoA(filename, SE_FILE_OBJECT, OWNER_SECURITY_INFORMATION | GROUP_SECURITY_INFORMATION | DACL_SECURITY_INFORMATION, &pSidOwner, &pSidGroup, &pDacl, NULL, &pSD);
    if (dwRes != ERROR_SUCCESS) {
        printf("获取文件安全描述符失败，错误码：%d\n", dwRes);
        return;
    }

    // 获取DACL的大小和ACE的数量
    dwRes = GetAclInformation(pDacl, (LPVOID)&dwAclSize, sizeof(dwAclSize), AclSizeInformation);
    if (dwRes != ERROR_SUCCESS) {
        printf("获取DACL信息失败，错误码：%d\n", dwRes);
        return;
    }
    dwAceCount = dwAclSize / sizeof(ACCESS_ALLOWED_ACE);

    // 遍历DACL中的ACE，获取用户及其权限
    for (DWORD i = 0; i < dwAceCount; i++) {
        ACCESS_ALLOWED_ACE* pAce;
        SID_NAME_USE sidType;
        DWORD dwUserNameSize = 0;
        DWORD dwDomainNameSize = 0;
        LPSTR pszDomainName = NULL;

        // 获取ACE
        if (!GetAce(pDacl, i, (LPVOID*)&pAce)) {
            printf("获取ACE失败\n");
            return;
        }

        // 获取SID对应的用户名和域名
        LookupAccountSidA(NULL, &(pAce->SidStart), NULL, &dwUserNameSize, NULL, &dwDomainNameSize, &sidType);
        if (dwUserNameSize > 0) {
            pszUserName = (LPSTR)LocalAlloc(LPTR, dwUserNameSize);
        }
        if (dwDomainNameSize > 0) {
            pszDomainName = (LPSTR)LocalAlloc(LPTR, dwDomainNameSize);
        }
        if (!LookupAccountSidA(NULL, &(pAce->SidStart), pszUserName, &dwUserNameSize, pszDomainName, &dwDomainNameSize, &sidType)) {
            printf("获取用户名失败\n");
            return;
        }

        // 打印用户及其权限
        printf("用户：%s\\%s\n", pszDomainName, pszUserName);
        printf("权限：");
        if (pAce->Mask & GENERIC_READ) {
            printf("读取 ");
        }
        if (pAce->Mask & GENERIC_WRITE) {
            printf("写入 ");
        }
        if (pAce->Mask & GENERIC_EXECUTE) {
            printf("执行 ");
        }
        if (pAce->Mask & GENERIC_ALL) {
            printf("全部 ");
        }
        printf("\n");

        // 释放内存
        if (pszUserName != NULL) {
            LocalFree(pszUserName);
            pszUserName = NULL;
        }
        if (pszDomainName != NULL) {
            LocalFree(pszDomainName);
            pszDomainName = NULL;
        }
    }

    // 释放内存
    if (pSD != NULL) {
        LocalFree(pSD);
        pSD = NULL;
    }
}

int main() {
    const char* filename = "C:\\path\\to\\file.txt";
    GetFilePermissions(filename);
    return 0;
}