ref: 1398c8aed38b0d42e7081410ae1710858d335f7e
dir: /opl/ioperm_sys.c/
// Emacs style mode select -*- C++ -*- //----------------------------------------------------------------------------- // // Copyright(C) 2002, 2003 Marcel Telka // Copyright(C) 2009 Simon Howard // // This program is free software; you can redistribute it and/or // modify it under the terms of the GNU General Public License // as published by the Free Software Foundation; either version 2 // of the License, or (at your option) any later version. // // This program is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // // You should have received a copy of the GNU General Public License // along with this program; if not, write to the Free Software // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA // 02111-1307, USA. // // DESCRIPTION: // Interface to the ioperm.sys driver, based on code from the // Cygwin ioperm library. // //----------------------------------------------------------------------------- #ifdef _WIN32 #include <stdio.h> #define WIN32_LEAN_AND_MEAN #include <windows.h> #include <winioctl.h> #include <errno.h> #define IOPERM_FILE "\\\\.\\ioperm" #define IOCTL_IOPERM \ CTL_CODE(FILE_DEVICE_UNKNOWN, 0xA00, METHOD_BUFFERED, FILE_ANY_ACCESS) struct ioperm_data { unsigned long from; unsigned long num; int turn_on; }; static SC_HANDLE scm = NULL; static SC_HANDLE svc = NULL; static int service_was_created = 0; static int service_was_started = 0; int IOperm_EnablePortRange(unsigned int from, unsigned int num, int turn_on) { HANDLE h; struct ioperm_data ioperm_data; DWORD BytesReturned; BOOL r; h = CreateFile(IOPERM_FILE, GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL); if (h == INVALID_HANDLE_VALUE) { errno = ENODEV; return -1; } ioperm_data.from = from; ioperm_data.num = num; ioperm_data.turn_on = turn_on; r = DeviceIoControl(h, IOCTL_IOPERM, &ioperm_data, sizeof ioperm_data, NULL, 0, &BytesReturned, NULL); if (!r) { errno = EPERM; } CloseHandle(h); return r != 0; } // Load ioperm.sys driver. // Returns 1 for success, 0 for failure. // Remember to call IOperm_UninstallDriver to uninstall the driver later. int IOperm_InstallDriver(void) { int error; int result = 1; scm = OpenSCManager(NULL, NULL, SC_MANAGER_ALL_ACCESS); if (scm == NULL) { error = GetLastError(); fprintf(stderr, "IOperm_InstallDriver: OpenSCManager failed (%i)\n", error); return 0; } svc = CreateService(scm, TEXT("ioperm"), TEXT("I/O port access driver"), SERVICE_ALL_ACCESS, SERVICE_KERNEL_DRIVER, SERVICE_AUTO_START, SERVICE_ERROR_NORMAL, "ioperm.sys", NULL, NULL, NULL, NULL, NULL); if (svc == NULL) { error = GetLastError(); if (error != ERROR_SERVICE_EXISTS) { fprintf(stderr, "IOperm_InstallDriver: Failed to create service (%i)\n", error); } else { svc = OpenService(scm, TEXT("ioperm"), SERVICE_ALL_ACCESS); if (svc == NULL) { error = GetLastError(); fprintf(stderr, "IOperm_InstallDriver: Failed to open service (%i)\n", error); } } if (svc == NULL) { CloseServiceHandle(scm); return 0; } } else { service_was_created = 1; } if (!StartService(svc, 0, NULL)) { error = GetLastError(); if (error != ERROR_SERVICE_ALREADY_RUNNING) { fprintf(stderr, "IOperm_InstallDriver: Failed to start service (%i)\n", error); result = 0; } else { printf("IOperm_InstallDriver: ioperm driver already running\n"); } } else { printf("IOperm_InstallDriver: ioperm driver installed\n"); service_was_started = 1; } if (result == 0) { CloseServiceHandle(svc); CloseServiceHandle(scm); } return result; } int IOperm_UninstallDriver(void) { SERVICE_STATUS stat; int result = 1; int error; // If we started the service, stop it. if (service_was_started) { if (!ControlService(svc, SERVICE_CONTROL_STOP, &stat)) { error = GetLastError(); if (error == ERROR_SERVICE_NOT_ACTIVE) { fprintf(stderr, "IOperm_UninstallDriver: Service not active? (%i)\n", error); } else { fprintf(stderr, "IOperm_UninstallDriver: Failed to stop service (%i)\n", error); result = 0; } } } // If we created the service, delete it. if (service_was_created) { if (!DeleteService(svc)) { error = GetLastError(); fprintf(stderr, "IOperm_UninstallDriver: DeleteService failed (%i)\n", error); result = 0; } } // Close handles. if (svc != NULL) { CloseServiceHandle(svc); svc = NULL; } if (scm != NULL) { CloseServiceHandle(scm); scm = NULL; } service_was_created = 0; service_was_started = 0; return result; } #endif /* #ifndef _WIN32 */