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// loaddrv.c - Dynamic driver install/start/stop/remove
// based on Paula Tomlinson's LOADDRV program.
// She describes it in her May 1995 article in Windows/DOS Developer's
// Journal (now Windows Developer's Journal).
// i removed the old/ugly dialog, it now accepts command line options and
// prints error messages with textual description from the OS.
#include <windows.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "loaddrv.h"
// globals
SC_HANDLE hSCMan = NULL;
//get ext messages for windows error codes:
void DisplayErrorText(DWORD dwLastError) {
LPSTR MessageBuffer;
DWORD dwBufferLength;
DWORD dwFormatFlags = FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_IGNORE_INSERTS |
FORMAT_MESSAGE_FROM_SYSTEM ;
if (dwBufferLength = FormatMessageA(
dwFormatFlags,
NULL, // module to get message from (NULL == system)
dwLastError,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // default language
(LPSTR) &MessageBuffer,
0,
NULL
))
{
// Output message
puts(MessageBuffer);
// Free the buffer allocated by the system.
LocalFree(MessageBuffer);
}
}
int main(int argc, char *argv[]) {
DWORD status = 0;
if (argc < 3) {
printf("USGAE: loaddrv start|stop|install|remove drivername [fullpathforinstall]");
exit(1);
}
LoadDriverInit();
if (strcmp(argv[1], "start") == 0) {
printf("starting %s... ", argv[2]);
status = DriverStart(argv[2]);
if ( status != OKAY) {
printf("start failed (status %ld):\n", status);
} else {
printf("ok.\n");
}
} else if (strcmp(argv[1], "stop") == 0) {
printf("stoping %s... ", argv[2]);
status = DriverStop(argv[2]);
if ( status != OKAY) {
printf("stop failed (status %ld):\n", status);
} else {
printf("ok.\n");
}
} else if (strcmp(argv[1], "install") == 0) {
char path[MAX_PATH*2];
if (argc<4) {
char cwd[MAX_PATH];
getcwd(cwd, sizeof cwd);
sprintf(path, "%s\\%s.sys", cwd, argv[2]);
} else {
strncpy(path, argv[3], MAX_PATH);
}
printf("installing %s from %s... ", argv[2], path);
status = DriverInstall(path, argv[2]);
if ( status != OKAY) {
printf("install failed (status %ld):\n", status);
} else {
printf("ok.\n");
}
} else if (strcmp(argv[1], "remove") == 0) {
printf("removing %s... ", argv[2]);
status = DriverRemove(argv[2]);
if ( status != OKAY) {
printf("remove failed (status %ld):\n", status);
} else {
printf("ok.\n");
}
} else {
printf("USGAE: loaddrv start|stop|install|remove drivername [fullpathforinstall]");
exit(1);
}
if (status) DisplayErrorText(status);
LoadDriverCleanup();
return 0;
}
DWORD LoadDriverInit(void) {
// connect to local service control manager
if ((hSCMan = OpenSCManager(NULL, NULL,
SC_MANAGER_ALL_ACCESS)) == NULL) {
return -1;
}
return OKAY;
}
void LoadDriverCleanup(void) {
if (hSCMan != NULL) CloseServiceHandle(hSCMan);
}
/**-----------------------------------------------------**/
DWORD DriverInstall(LPSTR lpPath, LPSTR lpDriver)
{
BOOL dwStatus = OKAY;
SC_HANDLE hService = NULL;
// add to service control manager's database
if ((hService = CreateService(hSCMan, lpDriver,
lpDriver, SERVICE_ALL_ACCESS, SERVICE_KERNEL_DRIVER,
SERVICE_DEMAND_START, SERVICE_ERROR_NORMAL, lpPath,
NULL, NULL, NULL, NULL, NULL)) == NULL)
dwStatus = GetLastError();
else CloseServiceHandle(hService);
return dwStatus;
} // DriverInstall
/**-----------------------------------------------------**/
DWORD DriverStart(LPSTR lpDriver)
{
BOOL dwStatus = OKAY;
SC_HANDLE hService = NULL;
// get a handle to the service
if ((hService = OpenService(hSCMan, lpDriver,
SERVICE_ALL_ACCESS)) != NULL)
{
// start the driver
if (!StartService(hService, 0, NULL))
dwStatus = GetLastError();
} else dwStatus = GetLastError();
if (hService != NULL) CloseServiceHandle(hService);
return dwStatus;
} // DriverStart
/**-----------------------------------------------------**/
DWORD DriverStop(LPSTR lpDriver)
{
BOOL dwStatus = OKAY;
SC_HANDLE hService = NULL;
SERVICE_STATUS serviceStatus;
// get a handle to the service
if ((hService = OpenService(hSCMan, lpDriver,
SERVICE_ALL_ACCESS)) != NULL)
{
// stop the driver
if (!ControlService(hService, SERVICE_CONTROL_STOP,
&serviceStatus))
dwStatus = GetLastError();
} else dwStatus = GetLastError();
if (hService != NULL) CloseServiceHandle(hService);
return dwStatus;
} // DriverStop
/**-----------------------------------------------------**/
DWORD DriverRemove(LPSTR lpDriver)
{
BOOL dwStatus = OKAY;
SC_HANDLE hService = NULL;
// get a handle to the service
if ((hService = OpenService(hSCMan, lpDriver,
SERVICE_ALL_ACCESS)) != NULL)
{
// remove the driver
if (!DeleteService(hService))
dwStatus = GetLastError();
} else dwStatus = GetLastError();
if (hService != NULL) CloseServiceHandle(hService);
return dwStatus;
} // DriverRemove
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