Voglio eseguire un programma C++ con il mio back-end PHP. Il programma C++ è responsabile della rimozione di dispositivi USB come chiavette USB dal mio PC. Quando apro il programma (che si trova su un'unità locale separata) con la CLI senza diritti amministrativi, il programma inizia e termina il lavoro correttamente.Il programma eseguito PHP non riesce
Quando avvio il programma con PHP utilizzando exec("/path/to/my/program.exe and-parameters")
che è letteralmente lo stesso della CLI, il programma si avvia e ritorna "non riuscito", quindi qualcosa è diverso quando si utilizza la CLI.
Il Codice C++:
//
// RemoveDriveByLetter.cpp by Uwe Sieber - www.uwe-sieber.de
//
// Simple demonstration how to prepare a disk drive for save removal
//
// Works with removable and fixed drives under W2K, XP, W2K3, Vista
//
// Console application - expects the drive letter of the drive to remove as parameter
//
// you are free to use this code in your projects
//
#include "stdafx.h"
#include <stdio.h>
#include <windows.h>
#include <Setupapi.h>
#include <winioctl.h>
#include <winioctl.h>
#include <cfgmgr32.h>
#include <string>
//-------------------------------------------------
DEVINST GetDrivesDevInstByDeviceNumber(long DeviceNumber, UINT DriveType, char* szDosDeviceName);
//-------------------------------------------------
//-------------------------------------------------
int main(int argc, char* argv[])
{
/*if (argc != 2) {
return 1;
}*/
char DriveLetter = argv[1][0];
DriveLetter &= ~0x20; // uppercase
if (DriveLetter < 'A' || DriveLetter > 'Z') {
return 1;
}
std::string path = "";
path += DriveLetter;
path.append(":\\");
printf(path.c_str());
char szRootPath[sizeof(path)] ="";
strncpy(szRootPath, path.c_str(), sizeof(path));
std::string device = "";
device += DriveLetter;
device.append(":");
printf(device.c_str());
char szDevicePath[sizeof(device)] = "";
strncpy(szDevicePath, device.c_str(), sizeof(device));
std::string accesspath = "";
accesspath += "\\\\.\\";
accesspath += device;
printf(accesspath.c_str());
char szVolumeAccessPath[sizeof(accesspath)] = ""; // "\\.\X:" -> to open the volume
strncpy(szVolumeAccessPath, accesspath.c_str(), sizeof(accesspath));
long DeviceNumber = -1;
// open the storage volume
HANDLE hVolume = CreateFile(szVolumeAccessPath, 0, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, NULL, NULL);
if (hVolume == INVALID_HANDLE_VALUE) {
return 1;
}
// get the volume's device number
STORAGE_DEVICE_NUMBER sdn;
DWORD dwBytesReturned = 0;
long res = DeviceIoControl(hVolume, IOCTL_STORAGE_GET_DEVICE_NUMBER, NULL, 0, &sdn, sizeof(sdn), &dwBytesReturned, NULL);
if (res) {
DeviceNumber = sdn.DeviceNumber;
}
CloseHandle(hVolume);
if (DeviceNumber == -1) {
return 1;
}
// get the drive type which is required to match the device numbers correctely
UINT DriveType = GetDriveType(szRootPath);
// get the dos device name (like \device\floppy0) to decide if it's a floppy or not - who knows a better way?
char szDosDeviceName[MAX_PATH];
res = QueryDosDevice(szDevicePath, szDosDeviceName, MAX_PATH);
if (!res) {
return 1;
}
// get the device instance handle of the storage volume by means of a SetupDi enum and matching the device number
DEVINST DevInst = GetDrivesDevInstByDeviceNumber(DeviceNumber, DriveType, szDosDeviceName);
if (DevInst == 0) {
return 1;
}
PNP_VETO_TYPE VetoType = PNP_VetoTypeUnknown;
WCHAR VetoNameW[MAX_PATH];
VetoNameW[0] = 0;
bool bSuccess = false;
// get drives's parent, e.g. the USB bridge, the SATA port, an IDE channel with two drives!
DEVINST DevInstParent = 0;
res = CM_Get_Parent(&DevInstParent, DevInst, 0);
for (long tries=1; tries<=3; tries++) { // sometimes we need some tries...
VetoNameW[0] = 0;
// CM_Query_And_Remove_SubTree doesn't work for restricted users
//res = CM_Query_And_Remove_SubTreeW(DevInstParent, &VetoType, VetoNameW, MAX_PATH, CM_REMOVE_NO_RESTART); // CM_Query_And_Remove_SubTreeA is not implemented under W2K!
//res = CM_Query_And_Remove_SubTreeW(DevInstParent, NULL, NULL, 0, CM_REMOVE_NO_RESTART); // with messagebox (W2K, Vista) or balloon (XP)
res = CM_Request_Device_EjectW(DevInstParent, &VetoType, VetoNameW, MAX_PATH, 0);
//res = CM_Request_Device_EjectW(DevInstParent, NULL, NULL, 0, 0); // with messagebox (W2K, Vista) or balloon (XP)
bSuccess = (res==CR_SUCCESS && VetoType==PNP_VetoTypeUnknown);
if (bSuccess) {
break;
}
Sleep(500); // required to give the next tries a chance!
}
if (bSuccess) {
printf("Success\n\n");
return 0;
}
printf("failed\n");
printf("Result=0x%2X\n", res);
if (VetoNameW[0]) {
printf("VetoName=%ws)\n\n", VetoNameW);
}
return 1;
}
//-----------------------------------------------------------
char* appendCharToCharArray(char* array, char a)
{
size_t len = strlen(array);
char* ret = new char[len+2];
strcpy(ret, array);
ret[len] = a;
ret[len+1] = '\0';
return ret;
}
//----------------------------------------------------------------------
// returns the device instance handle of a storage volume or 0 on error
//----------------------------------------------------------------------
DEVINST GetDrivesDevInstByDeviceNumber(long DeviceNumber, UINT DriveType, char* szDosDeviceName)
{
bool IsFloppy = (strstr(szDosDeviceName, "\\Floppy") != NULL); // who knows a better way?
GUID* guid;
switch (DriveType) {
case DRIVE_REMOVABLE:
if (IsFloppy) {
guid = (GUID*)&GUID_DEVINTERFACE_FLOPPY;
} else {
guid = (GUID*)&GUID_DEVINTERFACE_DISK;
}
break;
case DRIVE_FIXED:
guid = (GUID*)&GUID_DEVINTERFACE_DISK;
break;
case DRIVE_CDROM:
guid = (GUID*)&GUID_DEVINTERFACE_CDROM;
break;
default:
return 0;
}
// Get device interface info set handle for all devices attached to system
HDEVINFO hDevInfo = SetupDiGetClassDevs(guid, NULL, NULL, DIGCF_PRESENT | DIGCF_DEVICEINTERFACE);
if (hDevInfo == INVALID_HANDLE_VALUE) {
return 0;
}
// Retrieve a context structure for a device interface of a device information set
DWORD dwIndex = 0;
long res;
BYTE Buf[1024];
PSP_DEVICE_INTERFACE_DETAIL_DATA pspdidd = (PSP_DEVICE_INTERFACE_DETAIL_DATA)Buf;
SP_DEVICE_INTERFACE_DATA spdid;
SP_DEVINFO_DATA spdd;
DWORD dwSize;
spdid.cbSize = sizeof(spdid);
while (true) {
res = SetupDiEnumDeviceInterfaces(hDevInfo, NULL, guid, dwIndex, &spdid);
if (!res) {
break;
}
dwSize = 0;
SetupDiGetDeviceInterfaceDetail(hDevInfo, &spdid, NULL, 0, &dwSize, NULL); // check the buffer size
if (dwSize!=0 && dwSize<=sizeof(Buf)) {
pspdidd->cbSize = sizeof(*pspdidd); // 5 Bytes!
ZeroMemory(&spdd, sizeof(spdd));
spdd.cbSize = sizeof(spdd);
long res = SetupDiGetDeviceInterfaceDetail(hDevInfo, &spdid, pspdidd, dwSize, &dwSize, &spdd);
if (res) {
// in case you are interested in the USB serial number:
// the device id string contains the serial number if the device has one,
// otherwise a generated id that contains the '&' char...
/*
DEVINST DevInstParent = 0;
CM_Get_Parent(&DevInstParent, spdd.DevInst, 0);
char szDeviceIdString[MAX_PATH];
CM_Get_Device_ID(DevInstParent, szDeviceIdString, MAX_PATH, 0);
printf("DeviceId=%s\n", szDeviceIdString);
*/
// open the disk or cdrom or floppy
HANDLE hDrive = CreateFile(pspdidd->DevicePath, 0, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, NULL);
if (hDrive != INVALID_HANDLE_VALUE) {
// get its device number
STORAGE_DEVICE_NUMBER sdn;
DWORD dwBytesReturned = 0;
res = DeviceIoControl(hDrive, IOCTL_STORAGE_GET_DEVICE_NUMBER, NULL, 0, &sdn, sizeof(sdn), &dwBytesReturned, NULL);
if (res) {
if (DeviceNumber == (long)sdn.DeviceNumber) { // match the given device number with the one of the current device
CloseHandle(hDrive);
SetupDiDestroyDeviceInfoList(hDevInfo);
return spdd.DevInst;
}
}
CloseHandle(hDrive);
}
}
}
dwIndex++;
}
SetupDiDestroyDeviceInfoList(hDevInfo);
return 0;
}
//-----------------------------------------------------------
Il programma ritorna:
array (2) ([0] => (stringa) D: \ D: \ \ D:. Fallito [ 1] => (stringa) Risultato = 0x33)
Qualcuno un suggerimento?
Perché la funzione 'exec' esegue il programma richiesto utilizzando lo stesso utente del server Web? Che probabilmente non hanno i diritti per fare ciò che vuoi fare. –
questo è stato anche il mio primo pensiero, ma l'utente autenticato ha gli stessi diritti del sistema. – Snickbrack
mostra solo 'ls -l' di questo file exe più dovresti ottenere più feedback da exec visualizzare tutti gli errori e così via – Zgr3doo