file - 如何在 Windows 8 上通过 C++ MFC 授予“所有人”写入权限？

Question

我正在努力改变权限。在 Windows 8 上，我需要将文件的权限更改为具有组“每个人”的写入权限。我该怎么做？我试图用 C++ MFC 编辑一个文件，该文件已经存在而没有检查“写入”（每个人），这给我带来了很多问题。

Answer 1

您的应用程序需要有权更改文件的权限。

#pragma comment(lib, "Advapi32.lib") 

#include "Aclapi.h"
#include "Sddl.h"
#include <io.h>
#include <sys/stat.h>

void AllowEveryone(CString path) 
{
    PACL pDacl,pNewDACL;
    EXPLICIT_ACCESS ExplicitAccess;
    PSECURITY_DESCRIPTOR ppSecurityDescriptor;
    PSID psid;

    LPTSTR lpStr;
    CString str = path;
    lpStr = str.GetBuffer();

    GetNamedSecurityInfo(lpStr, SE_FILE_OBJECT,DACL_SECURITY_INFORMATION, NULL, NULL, &pDacl, NULL, &ppSecurityDescriptor);
    ConvertStringSidToSid("S-1-1-0", &psid);

    ExplicitAccess.grfAccessMode = SET_ACCESS;
    ExplicitAccess.grfAccessPermissions = GENERIC_ALL;
    ExplicitAccess.grfInheritance = CONTAINER_INHERIT_ACE | OBJECT_INHERIT_ACE;
    ExplicitAccess.Trustee.MultipleTrusteeOperation = NO_MULTIPLE_TRUSTEE;
    ExplicitAccess.Trustee.pMultipleTrustee = NULL;
    ExplicitAccess.Trustee.ptstrName = (LPTSTR) psid;
    ExplicitAccess.Trustee.TrusteeForm = TRUSTEE_IS_SID;
    ExplicitAccess.Trustee.TrusteeType = TRUSTEE_IS_UNKNOWN;

    SetEntriesInAcl(1, &ExplicitAccess, pDacl, &pNewDACL);
    SetNamedSecurityInfo(lpStr,SE_FILE_OBJECT,DACL_SECURITY_INFORMATION,NULL,NULL,pNewDACL,NULL);

    LocalFree(pNewDACL);
    LocalFree(psid);

    str.ReleaseBuffer();
}