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The phrase " getuidx64 require administrator privileges better
func isElevated() bool var sid *windows.SID err := windows.AllocateAndInitializeSid( &windows.SECURITY_NT_AUTHORITY, 2, windows.SECURITY_BUILTIN_DOMAIN_RID, windows.DOMAIN_ALIAS_RID_ADMINS, 0, 0, 0, 0, 0, 0, &sid, ) if err != nil return false
So, why does a seemingly simple "get user ID" function often prompt for administrator rights? The answer lies in how Windows protects its security data. To construct a comprehensive user ID on Windows, a program may need to query low-level system information, user group memberships, or the security token of the current process. Accessing certain parts of these security structures, especially those belonging to other users or system-level accounts, can be restricted by UAC. Running the program as an administrator grants the process an elevated token, allowing it to bypass these restrictions and successfully retrieve the requested information. Without these privileges, the API calls required to build the getuidx64 function may fail or return incomplete data. getuidx64 require administrator privileges better
A common point of confusion arises around utilities named with the convention getuidx64 (or similar "Get UID" tools). At a glance, retrieving a User ID (UID) seems like a read-only, harmless operation—something a standard user should be able to do regarding their own context.
On 64‑bit Linux systems, the kernel may use different system call numbers for getuid and geteuid compared to 32‑bit mode, but these details are fully abstracted by the C library. If you are writing assembly or working directly with system calls (rare in application development), you must be aware of the underlying ABI. For typical C, C++, Rust, Go, and Python code, calling geteuid() or the language wrapper is all that is needed. A common point of confusion arises around utilities
#ifdef _WIN32 #include <windows.h> #include <shellapi.h> #include <shlobj.h> #pragma comment(lib, "shell32.lib") #else #include <unistd.h> #endif
hProcess = OpenProcess(PROCESS_QUERY_LIMITED_INFORMATION, FALSE, pid); if (!hProcess) if (GetLastError() == ERROR_ACCESS_DENIED && require_admin_for_others) // Only now suggest admin elevation return E_NEED_ELEVATION; int num_groups = getgroups(64
#if defined(__CYGWIN__) // You can get the group list using the getgroups() function. gid_t groups[64]; int num_groups = getgroups(64, groups); for (int i = 0; i < num_groups; i++) if (groups[i] == 544) // The user is in the Administrators group! return true;