logon.c File Reference

#include "precomp.h"

Go to the source code of this file.

Functions
BOOL	_RegisterLogonProcess (DWORD dwProcessId, BOOL fSecure)
UINT	_LockWindowStation (PWINDOWSTATION pwinsta)
BOOL	_UnlockWindowStation (PWINDOWSTATION pwinsta)
BOOL	_SetLogonNotifyWindow (PWND pwnd)

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Function Documentation

UINT _LockWindowStation (  PWINDOWSTATION  pwinsta  )

Definition at line 57 of file logon.c. References BOOL, tagWINDOWSTATION::dwWSF_Flags, FALSE, GetCurrentProcessId, gpidLogon, grpdeskLogon, NULL, OBJECT_TO_OBJECT_HEADER, tagWINDOWSTATION::rpdeskList, tagDESKTOP::rpdeskNext, TRUE, UINT, WSF_OPENLOCK, WSF_SHUTDOWN, and WSF_SWITCHLOCK. Referenced by NtUserLockWindowStation(). { PDESKTOP pdesk; BOOL fBusy = FALSE; /* * Make sure the caller is the logon process */ if (GetCurrentProcessId() != gpidLogon) { RIPERR0(ERROR_ACCESS_DENIED, RIP_WARNING, "Access denied in _LockWindowStation"); return WSS_ERROR; } /* * Prevent desktop switches */ pwinsta->dwWSF_Flags |= WSF_SWITCHLOCK; /* * Determine whether the station is busy */ pdesk = pwinsta->rpdeskList; while (pdesk != NULL) { if (pdesk != grpdeskLogon && OBJECT_TO_OBJECT_HEADER(pdesk)->HandleCount != 0) { /* * This desktop is open, thus the station is busy */ fBusy = TRUE; break; } pdesk = pdesk->rpdeskNext; } if (pwinsta->dwWSF_Flags & WSF_SHUTDOWN) pwinsta->dwWSF_Flags |= WSF_OPENLOCK; /* * Unlock opens if the station is busy and is not in the middle * of shutting down. */ if (fBusy) return WSS_BUSY; else return WSS_IDLE; }

BOOL _RegisterLogonProcess (  DWORD  dwProcessId, BOOL  fSecure )

Definition at line 25 of file logon.c. References BOOL, FALSE, gpidLogon, IsPrivileged(), psTcb, and TRUE. { UNREFERENCED_PARAMETER(fSecure); /* * Allow only one logon process and then only if it has TCB * privilege. */ if (gpidLogon != 0 || !IsPrivileged(&psTcb)) { RIPERR0(ERROR_ACCESS_DENIED, RIP_WARNING, "Access denied in _RegisterLogonProcess"); return FALSE; } gpidLogon = (HANDLE)LongToHandle( dwProcessId ); return TRUE; }

BOOL _SetLogonNotifyWindow (  PWND  pwnd  )

Definition at line 153 of file logon.c. References BOOL, FALSE, GetCurrentProcessId, gpidLogon, gspwndLogonNotify, Lock, and TRUE. Referenced by NtUserSetLogonNotifyWindow(). { /* * Make sure the caller is the logon process */ if (GetCurrentProcessId() != gpidLogon) { RIPERR0(ERROR_ACCESS_DENIED, RIP_WARNING, "Access denied in _SetLogonNotifyWindow"); return FALSE; } Lock(&gspwndLogonNotify, pwnd); return TRUE; }

BOOL _UnlockWindowStation (  PWINDOWSTATION  pwinsta  )

Definition at line 119 of file logon.c. References BOOL, tagWINDOWSTATION::dwWSF_Flags, FALSE, GetCurrentProcessId, gpidLogon, TRUE, WSF_OPENLOCK, WSF_SHUTDOWN, and WSF_SWITCHLOCK. Referenced by NtUserUnlockWindowStation(). { /* * Make sure the caller is the logon process */ if (GetCurrentProcessId() != gpidLogon) { RIPERR0(ERROR_ACCESS_DENIED, RIP_WARNING, "Access denied in _UnlockWindowStation"); return FALSE; } /* * If shutdown is occuring, only remove the switch lock. */ if (pwinsta->dwWSF_Flags & WSF_SHUTDOWN) pwinsta->dwWSF_Flags &= ~WSF_SWITCHLOCK; else pwinsta->dwWSF_Flags &= ~(WSF_OPENLOCK | WSF_SWITCHLOCK); return TRUE; }

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