在Win7中，你可以在cmd中输入whoami/user来轻松获取sid信息，但是，要在程序中获得，该怎么做呢？如下（Windows API, 我服了你）：
#include <stdio.h>#include <windows.h>#define MAX_NAME 256void ConvertSid(PSID pSid, LPTSTR TextualSid){PSID_IDENTIFIER_AUTHORITY psia = GetSidIdentifierAuthority(pSid);DWORD sidLen = sprintf(TextualSid, TEXT("S-%lu-"), SID_REVISION);sidLen += sprintf(TextualSid + strlen(TextualSid), TEXT("%lu"), psia->Value[5]);int i = 0;int subAuthorities = *GetSidSubAuthorityCount(pSid);for (i = 0; i < subAuthorities; i++){sidLen += sprintf(TextualSid + sidLen, TEXT("-%lu"), *GetSidSubAuthority(pSid, i));}}void GetLocalSid(LPTSTR szSid){char szUserName[MAX_NAME] = {0};DWORD nameSize = sizeof(szUserName) ;GetUserName(szUserName, &nameSize);char szUserSid[MAX_NAME] = {0};char szUserDomain[MAX_NAME] = {0};DWORD sidSize = sizeof(szUserSid);DWORD domainSize = sizeof(szUserDomain);SID_NAME_USE snu;LookupAccountName( NULL,szUserName,(PSID)szUserSid,&sidSize,szUserDomain,&domainSize,&snu);ConvertSid(szUserSid, szSid);}int main(){char szSid[MAX_NAME] = {0};GetLocalSid(szSid);printf("%s\n", szSid);return 0;}
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