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Utils.c
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Utils.c
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/*
* Copyright (C) 2017 Andrei Evgenievich Warkentin
*
* This program and the accompanying materials
* are licensed and made available under the terms and conditions of the BSD License
* which accompanies this distribution. The full text of the license may be found at
* http://opensource.org/licenses/bsd-license.php
*
* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
*/
#include <Uefi.h>
#include <Library/UefiLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/UtilsLib.h>
#include <Protocol/SimpleFileSystem.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Protocol/LoadedImage.h>
#include <Protocol/EfiShellInterface.h>
#include <Protocol/ShellParameters.h>
#include <Guid/FileInfo.h>
EFI_STATUS
GetOpt(IN UINTN Argc,
IN CHAR16 **Argv,
IN CHAR16 *OptionsWithArgs,
IN OUT GET_OPT_CONTEXT *Context)
{
UINTN Index;
UINTN SkipCount;
if (Context->OptIndex >= Argc ||
*Argv[Context->OptIndex] != L'-') {
return EFI_END_OF_MEDIA;
}
if (*(Argv[Context->OptIndex] + 1) == L'\0') {
/*
* A lone dash is used to signify end of options list.
*
* Like above, but we want to skip the dash.
*/
Context->OptIndex++;
return EFI_END_OF_MEDIA;
}
SkipCount = 1;
Context->Opt = *(Argv[Context->OptIndex] + 1);
if (OptionsWithArgs != NULL) {
UINTN ArgsLen = StrLen(OptionsWithArgs);
for (Index = 0; Index < ArgsLen; Index++) {
if (OptionsWithArgs[Index] == Context->Opt) {
if (*(Argv[Context->OptIndex] + 2) != L'\0') {
/*
* Argument to the option may immediately follow
* the option (not separated by space).
*/
Context->OptArg = Argv[Context->OptIndex] + 2;
} else if (Context->OptIndex + 1 < Argc &&
*(Argv[Context->OptIndex + 1]) != L'-') {
/*
* If argument is separated from option by space, it
* cannot look like an option (i.e. begin with a dash).
*/
Context->OptArg = Argv[Context->OptIndex + 1];
SkipCount++;
} else {
/*
* No argument. Maybe it was optional? Up to the caller
* to decide.
*/
Context->OptArg = NULL;
}
break;
}
}
}
Context->OptIndex += SkipCount;
return EFI_SUCCESS;
}
EFI_STATUS
FileSystemSave (
IN EFI_HANDLE Handle,
IN CHAR16 *VolSubDir,
IN CHAR16 *Path,
IN VOID *Table,
IN UINTN TableSize
)
{
EFI_STATUS Status;
EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *FsProtocol;
EFI_FILE_PROTOCOL *Fs;
EFI_FILE_PROTOCOL *Dir;
EFI_FILE_PROTOCOL *File;
UINTN Size;
Status = gBS->HandleProtocol(Handle, &gEfiSimpleFileSystemProtocolGuid,
(void **) &FsProtocol);
if (Status != EFI_SUCCESS) {
Print(L"Could not open filesystem: %r\n", Status);
return Status;
}
Status = FsProtocol->OpenVolume(FsProtocol, &Fs);
if (Status != EFI_SUCCESS) {
Print(L"Could not open volume: %r\n", Status);
return Status;
}
Status = Fs->Open(Fs, &Dir, VolSubDir, EFI_FILE_MODE_CREATE |
EFI_FILE_MODE_READ | EFI_FILE_MODE_WRITE,
EFI_FILE_DIRECTORY);
if (Status != EFI_SUCCESS) {
Print(L"Could not open '\\%s': %r\n", VolSubDir, Status);
return Status;
}
if (Dir->Open(Dir, &File, Path, EFI_FILE_MODE_READ |
EFI_FILE_MODE_WRITE, 0) == EFI_SUCCESS) {
/*
* Delete existing file.
*/
Print(L"Overwriting existing'\\%s\\%s': %r\n", VolSubDir, Path);
Status = Dir->Delete(File);
File = NULL;
if (Status != EFI_SUCCESS) {
Print(L"Could not delete existing '\\%s\\%s': %r\n", VolSubDir, Path, Status);
goto closeDir;
}
}
Status = Dir->Open(Dir, &File, Path, EFI_FILE_MODE_CREATE | EFI_FILE_MODE_READ |
EFI_FILE_MODE_WRITE, 0);
if (Status != EFI_SUCCESS) {
Print(L"Could not open '\\%s\\%s': %r\n", VolSubDir, Path, Status);
goto closeDir;
return Status;
}
Size = TableSize;
Status = File->Write(File, &Size, (void *) Table);
if (Status != EFI_SUCCESS || Size != TableSize) {
Print(L"Writing '\\%s\\%s' failed: %r\n", VolSubDir, Path, Status);
} else {
File->Flush(File);
}
Dir->Close(File);
closeDir:
Fs->Close(Dir);
return Status;
}
VOID *
GetTable (
IN EFI_GUID *Guid
)
{
UINTN i;
for (i = 0; i < gST->NumberOfTableEntries; i++) {
if (CompareGuid(&gST->ConfigurationTable[i].VendorGuid, Guid)) {
return gST->ConfigurationTable[i].VendorTable;
}
}
return NULL;
}
INTN
StriCmp (
IN CONST CHAR16 *FirstString,
IN CONST CHAR16 *SecondString
)
{
CHAR16 UpperFirstString;
CHAR16 UpperSecondString;
UpperFirstString = CharToUpper(*FirstString);
UpperSecondString = CharToUpper(*SecondString);
while ((*FirstString != '\0') && (UpperFirstString == UpperSecondString)) {
FirstString++;
SecondString++;
UpperFirstString = CharToUpper(*FirstString);
UpperSecondString = CharToUpper(*SecondString);
}
return UpperFirstString - UpperSecondString;
}
CHAR16 *
StrDuplicate (
IN CONST CHAR16 *Src
)
{
CHAR16 *Dest;
UINTN Size;
Size = StrSize (Src);
Dest = AllocateZeroPool (Size);
if (Dest != NULL) {
CopyMem (Dest, Src, Size);
}
return Dest;
}
EFI_STATUS
GetShellArgcArgv(
IN EFI_HANDLE ImageHandle,
OUT UINTN *Argcp,
OUT CHAR16 ***Argvp
)
{
EFI_STATUS Status;
EFI_SHELL_PARAMETERS_PROTOCOL *EfiShellParametersProtocol;
EFI_SHELL_INTERFACE *EfiShellInterface;
Status = gBS->OpenProtocol(ImageHandle,
&gEfiShellParametersProtocolGuid,
(VOID **)&EfiShellParametersProtocol,
ImageHandle,
NULL,
EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
if (!EFI_ERROR(Status)) {
/*
* Shell 2.0 interface.
*/
*Argcp = EfiShellParametersProtocol->Argc;
*Argvp = EfiShellParametersProtocol->Argv;
return EFI_SUCCESS;
}
Status = gBS->OpenProtocol(ImageHandle,
&gEfiShellInterfaceGuid,
(VOID **)&EfiShellInterface,
ImageHandle,
NULL,
EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
if (!EFI_ERROR(Status)) {
/*
* 1.0 interface.
*/
*Argcp = EfiShellInterface->Argc;
*Argvp = EfiShellInterface->Argv;
return EFI_SUCCESS;
}
return EFI_NOT_FOUND;
}