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630 lines
15 KiB
630 lines
15 KiB
/*++
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Copyright (c) 1993-1996 Microsoft Corporation
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Module Name:
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nvram.c
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Abstract:
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ARC/NV-RAM manipulation routines for 32-bit winnt setup.
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Also works on boot.ini on i386 machines.
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Author:
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Ted Miller (tedm) 19-December-1993
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Revision History:
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--*/
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#include "nvram.h"
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typedef enum {
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BootVarSystemPartition,
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BootVarOsLoader,
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BootVarOsLoadPartition,
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BootVarOsLoadFilename,
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BootVarLoadIdentifier,
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BootVarOsLoadOptions,
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BootVarCountdown,
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BootVarMax
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} BOOT_VARS;
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PWSTR BootVarNames[BootVarMax] = { L"SYSTEMPARTITION",
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L"OSLOADER",
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L"OSLOADPARTITION",
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L"OSLOADFILENAME",
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L"LOADIDENTIFIER",
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L"OSLOADOPTIONS",
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L"COUNTDOWN"
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};
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PWSTR PaddedBootVarNames[BootVarMax] = { L"SYSTEMPARTITION",
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L" OSLOADER",
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L"OSLOADPARTITION",
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L" OSLOADFILENAME",
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L" LOADIDENTIFIER",
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L" OSLOADOPTIONS",
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L" COUNTDOWN"
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};
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#ifndef i386
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//
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// Helper macro to make object attribute initialization a little cleaner.
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//
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#define INIT_OBJA(Obja,UnicodeString,UnicodeText) \
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\
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RtlInitUnicodeString((UnicodeString),(UnicodeText)); \
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\
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InitializeObjectAttributes( \
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(Obja), \
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(UnicodeString), \
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OBJ_CASE_INSENSITIVE, \
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NULL, \
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NULL \
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)
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BOOL
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DoSetNvRamVar(
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IN PWSTR VarName,
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IN PWSTR VarValue
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)
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{
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UNICODE_STRING U1,U2;
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RtlInitUnicodeString(&U1,VarName);
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RtlInitUnicodeString(&U2,VarValue);
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return(NT_SUCCESS(NtSetSystemEnvironmentValue(&U1,&U2)));
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}
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VOID
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PrintNvRamVariable(
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IN PWSTR VariableName,
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IN PWSTR VariableValue
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)
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{
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PWSTR pEnd;
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WCHAR c;
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BOOL FirstComponent = TRUE;
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while(*VariableValue) {
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//
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// Find the termination of the current component,
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// which is either a ; or 0.
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//
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pEnd = wcschr(VariableValue,L';');
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if(!pEnd) {
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pEnd = wcschr(VariableValue,0);
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}
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c = *pEnd;
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*pEnd = 0;
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wprintf(
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L"%s%s %s\n",
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FirstComponent ? VariableName : L" ",
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FirstComponent ? L":" : L" ",
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VariableValue
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);
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*pEnd = c;
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VariableValue = pEnd + (c ? 1 : 0);
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FirstComponent = FALSE;
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}
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}
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VOID
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RotateNvRamVariable(
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IN PWSTR VariableValue
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)
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{
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PWSTR pEnd;
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WCHAR Buffer[32768];
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//
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// Find the termination of the current component,
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// which is either a ; or 0.
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//
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pEnd = wcschr(VariableValue,L';');
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if(!pEnd) {
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pEnd = wcschr(VariableValue,0);
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}
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//
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// Copy VariableValue into Buffer starting at second entry
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//
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wcscpy(Buffer, pEnd + (*pEnd ? 1 : 0));
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//
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// Append first entry at the end of Buffer
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//
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if (*pEnd) wcscpy(Buffer + wcslen(Buffer), L";");
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*pEnd = 0;
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wcscpy(Buffer + wcslen(Buffer), VariableValue);
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//
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// Copy whole thing back into VariableValue
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//
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wcscpy(VariableValue, Buffer);
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}
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int _cdecl main(
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IN int argc,
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IN char *argv[]
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)
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{
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DWORD var;
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UNICODE_STRING UnicodeString;
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NTSTATUS Status;
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BOOLEAN OldPriv;
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WCHAR Buffer[32768];
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WCHAR Buffer1[32768];
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WCHAR Buffer2[32768];
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Status = RtlAdjustPrivilege(
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SE_SYSTEM_ENVIRONMENT_PRIVILEGE,
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TRUE,
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FALSE,
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&OldPriv
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);
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if(!NT_SUCCESS(Status)) {
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wprintf(L"Insufficient privilege.\n");
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return(0);
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}
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if(argc == 1) {
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for(var=0; var<BootVarMax; var++) {
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RtlInitUnicodeString(&UnicodeString,BootVarNames[var]);
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Status = NtQuerySystemEnvironmentValue(
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&UnicodeString,
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Buffer,
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SIZECHARS(Buffer),
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NULL
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);
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if(NT_SUCCESS(Status)) {
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PrintNvRamVariable(PaddedBootVarNames[var],Buffer);
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} else {
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wprintf(L"%s: <empty>\n",PaddedBootVarNames[var]);
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}
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wprintf(L"\n");
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}
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}
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if((argc == 2) && !lstrcmpiA(argv[1],"rotate")){
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for(var=0; var<BootVarMax; var++) {
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RtlInitUnicodeString(&UnicodeString,BootVarNames[var]);
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Status = NtQuerySystemEnvironmentValue(
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&UnicodeString,
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Buffer,
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SIZECHARS(Buffer),
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NULL
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);
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if(NT_SUCCESS(Status)) {
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RotateNvRamVariable(Buffer);
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printf(
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"Setting variable %ws to %ws [%s]\n",
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UnicodeString.Buffer,
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Buffer,
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DoSetNvRamVar(UnicodeString.Buffer,Buffer) ? "OK" : "Error"
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);
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} else {
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wprintf(L"%s: <empty>\n",PaddedBootVarNames[var]);
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}
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wprintf(L"\n");
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}
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}
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if((argc == 5) && !lstrcmpiA(argv[1]+1,"set") && !lstrcmpA(argv[3],"=")) {
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MultiByteToWideChar(
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CP_OEMCP,
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MB_PRECOMPOSED,
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argv[2],
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-1,
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Buffer1,
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SIZECHARS(Buffer1)
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);
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MultiByteToWideChar(
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CP_OEMCP,
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MB_PRECOMPOSED,
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argv[4],
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-1,
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Buffer2,
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SIZECHARS(Buffer2)
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);
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printf(
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"Setting variable %ws to %ws [%s]\n",
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Buffer1,
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Buffer2,
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DoSetNvRamVar(Buffer1,Buffer2) ? "OK" : "Error"
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);
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}
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return(0);
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}
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#else
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TCHAR LoadID[500]; // load identifier (no quotes)
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TCHAR CountDown[100]; // countdown timer
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TCHAR OsLoadOptions[500]; // load options
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TCHAR OsName[500]; // name of default os
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TCHAR OsLine[500]; // complete line of os description and options
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#define STR_BOOTINI TEXT("c:\\boot.ini")
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#define STR_BOOTLDR TEXT("boot loader")
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#define STR_TIMEOUT TEXT("timeout")
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#define STR_DEFAULT TEXT("default")
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#define STR_OPERATINGSYS TEXT("operating systems")
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#define STR_NULL TEXT("")
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//
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// HandleOption - add option to OsLoadOptions
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//
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VOID HandleOption( TCHAR* Option )
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{
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TCHAR SlashOption[200];
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TCHAR SlashOptionSlash[200];
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//
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// find out if option already exists
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// add blank to end to prevent debug from matching debugport
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//
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wsprintf( SlashOption, TEXT("/%s "), Option );
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wsprintf( SlashOptionSlash, TEXT("/%s/"), Option );
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if( wcsstr( OsLoadOptions, SlashOption ) ||
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wcsstr( OsLoadOptions, SlashOptionSlash ) )
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{
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printf("option already exists: %ws\n",Option);
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}
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else
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{
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//
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// append option without the trailing blank
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//
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printf("added option %ws\n",Option);
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lstrcat( OsLoadOptions, TEXT("/") );
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lstrcat( OsLoadOptions, Option );
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}
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}
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//
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// WriteBootIni - update the boot.ini file with our changes
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//
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VOID WriteBootIni()
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{
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DWORD FileAttr;
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//
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// Get file attributes of boot.ini for later restoration
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//
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FileAttr= GetFileAttributes( STR_BOOTINI );
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//
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// Change file attributes on boot.ini so we can write to it.
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//
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if( !SetFileAttributes( STR_BOOTINI, FILE_ATTRIBUTE_NORMAL ) )
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{
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printf("Failed to turn off read-only on boot.ini (lasterr= %d)\n",
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GetLastError() );
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}
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//
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// Update boot.ini strings
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//
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if( !WritePrivateProfileString( STR_BOOTLDR, STR_TIMEOUT,
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CountDown, STR_BOOTINI ) )
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{
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printf("failed to write timeout (lasterr= %d)\n",GetLastError());
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}
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//
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// create the osline from its parts
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//
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wsprintf(OsLine, TEXT("\"%s\"%s"), LoadID, OsLoadOptions );
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if( !WritePrivateProfileString( STR_OPERATINGSYS, OsName,
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OsLine, STR_BOOTINI ) )
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{
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printf("failed to write OS line (lasterr= %d)\n",GetLastError());
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}
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//
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// Restore boot.ini file attributes
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//
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if( FileAttr != 0xFFFFFFFF )
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{
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SetFileAttributes( STR_BOOTINI, FileAttr );
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}
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}
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//
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// Usage - print out usage information
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//
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VOID Usage()
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{
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printf("\nUsage:\n");
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printf(" no parameters: prints current settings.\n");
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printf(" /set parameter = value : sets value in boot.ini\n");
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printf(" rotate : rotates default build through boot options\n");
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printf("\n");
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printf("Example: nvram /set osloadoptions = debug\n");
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printf(" This will set the debug option on\n\n");
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printf("Available options:\n");
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printf(" loadidentifier, osloadoptions, countdown\n");
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}
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int _cdecl main(
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IN int argc,
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IN char *argv[]
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)
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{
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DWORD dwStatus;
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LPWSTR* pArgs;
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// parse command line in unicode
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pArgs= CommandLineToArgvW( GetCommandLine(), &argc );
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//
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// Get the boot information from boot.ini
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//
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// timeout
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dwStatus= GetPrivateProfileString(
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STR_BOOTLDR,
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STR_TIMEOUT,
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STR_NULL,
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CountDown,
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SIZECHARS(CountDown),
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STR_BOOTINI );
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if( !dwStatus )
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{
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printf("Failed to get timeout value\n");
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return(-1);
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}
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// default os description and options
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dwStatus= GetPrivateProfileString(
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STR_BOOTLDR,
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STR_DEFAULT,
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STR_NULL,
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OsName,
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SIZECHARS(OsName),
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STR_BOOTINI );
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if( !dwStatus )
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{
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printf("Failed to get default OS name\n");
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return(-1);
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}
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dwStatus= GetPrivateProfileString(
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STR_OPERATINGSYS,
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OsName,
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STR_NULL,
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OsLine,
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SIZECHARS(OsLine),
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STR_BOOTINI );
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if( !dwStatus )
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{
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printf("Failed to get default os description\n");
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return(-1);
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}
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//
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// Now parse the line into description and options.
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// If it starts with a quote, it may have options.
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// If it doesn't start with a quote, it won't.
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//
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*LoadID= *OsLoadOptions= TEXT('\0');
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if( *OsLine == TEXT('"') )
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{
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INT i;
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for( i=1; OsLine[i]; i++ )
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{
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LoadID[i-1]= OsLine[i];
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if( OsLine[i] == TEXT('"') )
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break;
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}
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if( OsLine[i] )
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{
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LoadID[i-1]= TEXT('\0'); // don't copy final quote
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lstrcpy( OsLoadOptions, &OsLine[i+1] );
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lstrcat( OsLoadOptions, TEXT(" ") ); // all options end with blank
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}
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}
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else
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{
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lstrcpy( LoadID, OsLine );
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lstrcpy( OsLoadOptions, TEXT("") );
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}
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// no parameters prints out values
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if( argc == 1 )
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{
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printf("%ws: %ws\n",PaddedBootVarNames[BootVarLoadIdentifier], LoadID);
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printf("%ws: %ws\n",PaddedBootVarNames[BootVarOsLoadOptions], OsLoadOptions);
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printf("%ws: %ws\n",PaddedBootVarNames[BootVarCountdown], CountDown);
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}
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// -set parameter = value
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// sets parameter to some value
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if( (argc == 2) &&
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!lstrcmpiW(pArgs[1],L"rotate") )
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{
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INT i;
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DWORD FileAttr;
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//
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// Read in all boot options
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//
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dwStatus= GetPrivateProfileString(
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STR_OPERATINGSYS,
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NULL,
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STR_NULL,
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OsLine,
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SIZECHARS(OsLine),
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STR_BOOTINI );
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if( !dwStatus )
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{
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printf("Failed to get os section\n");
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return(-1);
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}
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//
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// read through boot options until we find default entry
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//
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i = 0;
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while( lstrcmpiW( OsName, &(OsLine[i]) ) ){
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i = i + wcslen(&OsLine[i]) + 1;
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}
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//
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// increment one more entry
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//
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i = i + wcslen(&OsLine[i]) + 1;
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//
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// if we've gone off the end then start over
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//
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if (!lstrcmpiW( &(OsLine[i]), L"\0\0" ) ){
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i = 0;
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}
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//
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// Get file attributes of boot.ini for later restoration
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//
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FileAttr= GetFileAttributes( STR_BOOTINI );
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//
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// Change file attributes on boot.ini so we can write to it.
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//
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if( !SetFileAttributes( STR_BOOTINI, FILE_ATTRIBUTE_NORMAL ) )
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{
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printf("Failed to turn off read-only on boot.ini (lasterr= %d)\n",
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GetLastError() );
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}
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if( !WritePrivateProfileString( STR_BOOTLDR, STR_DEFAULT,
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&(OsLine[i]), STR_BOOTINI ) )
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{
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printf("failed to write default (lasterr= %d)\n",GetLastError());
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}
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//
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// Restore boot.ini file attributes
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//
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if( FileAttr != 0xFFFFFFFF )
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{
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SetFileAttributes( STR_BOOTINI, FileAttr );
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}
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}
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if( (argc == 5) &&
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!lstrcmpiW(pArgs[1]+1,L"set") &&
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!lstrcmpW(pArgs[3],L"=") )
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{
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INT i;
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// see if we understand parameter
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for( i=0; i<BootVarMax; i++ )
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{
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if( lstrcmpiW( pArgs[2], BootVarNames[i] ) == 0 )
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break;
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}
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// handle the ones we can
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switch( i )
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{
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default:
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printf("Not valid parameter name to set: %ws\n",pArgs[2]);
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Usage();
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return(-1);
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break;
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case BootVarLoadIdentifier:
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lstrcpyW( LoadID, pArgs[4] );
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break;
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case BootVarOsLoadOptions:
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HandleOption( pArgs[4] );
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break;
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case BootVarCountdown:
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lstrcpyW( CountDown, pArgs[4] );
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break;
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}
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WriteBootIni();
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}
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// -?
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// usage message
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if( argc == 2 && !lstrcmpW(pArgs[1]+1, L"?") )
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{
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Usage();
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}
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return(0);
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}
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#endif
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