f8ebcfc077
Add char16_t('u') literals
Remove wchar_t('L') literals
Signed-off-by: Callum Farmer <gmbr3@opensuse.org>
120 lines
3.8 KiB
C
120 lines
3.8 KiB
C
#include "lib.h"
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#include "efiprot.h"
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#include "efishell.h"
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#include "efishellintf.h"
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#ifndef MAX_ARGV_CONTENTS_SIZE
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# define MAX_CMDLINE_SIZE 1024
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#endif
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#ifndef MAX_ARGC
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# define MAX_CMDLINE_ARGC 32
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#endif
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/*
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Parse LoadedImage options area, called only in case the regular
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shell protos are not available.
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Format of LoadedImage->LoadOptions appears to be a
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single-space-separated list of args (looks like the shell already
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pre-parses the input, it apparently folds several consecutive spaces
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into one):
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argv[0] space argv[1] (etc.) argv[N] space \0 cwd \0 other data
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For safety, we support the trailing \0 without a space before, as
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well as several consecutive spaces (-> several args).
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*/
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static
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INTN
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GetShellArgcArgvFromLoadedImage(
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EFI_HANDLE ImageHandle,
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CHAR16 **ResultArgv[]
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)
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{
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EFI_STATUS Status;
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void *LoadedImage = NULL;
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static CHAR16 ArgvContents[MAX_CMDLINE_SIZE];
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static CHAR16 *Argv[MAX_CMDLINE_ARGC], *ArgStart, *c;
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UINTN Argc = 0, BufLen;
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Status = uefi_call_wrapper(BS->OpenProtocol, 6,
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ImageHandle,
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&LoadedImageProtocol,
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&LoadedImage,
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ImageHandle,
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NULL,
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EFI_OPEN_PROTOCOL_GET_PROTOCOL
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);
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if (EFI_ERROR(Status))
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return -1;
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BufLen = ((EFI_LOADED_IMAGE *)LoadedImage)->LoadOptionsSize;
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if (BufLen < 2) /* We are expecting at least a \0 */
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return -1;
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else if (BufLen > sizeof(ArgvContents))
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BufLen = sizeof(ArgvContents);
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CopyMem(ArgvContents, ((EFI_LOADED_IMAGE *)LoadedImage)->LoadOptions, BufLen);
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ArgvContents[MAX_CMDLINE_SIZE - 1] = u'\0';
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for (c = ArgStart = ArgvContents ; *c != u'\0' ; ++c) {
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if (*c == u' ') {
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*c = u'\0';
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if (Argc < MAX_CMDLINE_ARGC) Argv[Argc++] = ArgStart;
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ArgStart = c + 1;
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}
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}
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if ((*ArgStart != u'\0') && (Argc < MAX_CMDLINE_ARGC))
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Argv[Argc++] = ArgStart;
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// Print(u"Got argc/argv from loaded image proto\n");
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*ResultArgv = Argv;
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return Argc;
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}
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INTN GetShellArgcArgv(EFI_HANDLE ImageHandle, CHAR16 **Argv[])
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{
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// Code inspired from EDK2's
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// ShellPkg/Library/UefiShellCEntryLib/UefiShellCEntryLib.c (BSD)
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EFI_STATUS Status;
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static const EFI_GUID ShellInterfaceProtocolGuid
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= SHELL_INTERFACE_PROTOCOL_GUID;
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EFI_SHELL_PARAMETERS_PROTOCOL *EfiShellParametersProtocol = NULL;
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EFI_SHELL_INTERFACE *EfiShellInterfaceProtocol = NULL;
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Status = uefi_call_wrapper(BS->OpenProtocol, 6,
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ImageHandle,
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(EFI_GUID*)&ShellParametersProtocolGuid,
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(VOID **)&EfiShellParametersProtocol,
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ImageHandle,
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NULL,
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EFI_OPEN_PROTOCOL_GET_PROTOCOL
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);
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if (!EFI_ERROR(Status))
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{
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// use shell 2.0 interface
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// Print(u"Got argc/argv from shell intf proto\n");
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*Argv = EfiShellParametersProtocol->Argv;
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return EfiShellParametersProtocol->Argc;
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}
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// try to get shell 1.0 interface instead.
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Status = uefi_call_wrapper(BS->OpenProtocol, 6,
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ImageHandle,
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(EFI_GUID*)&ShellInterfaceProtocolGuid,
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(VOID **)&EfiShellInterfaceProtocol,
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ImageHandle,
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NULL,
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EFI_OPEN_PROTOCOL_GET_PROTOCOL
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);
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if (!EFI_ERROR(Status))
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{
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// Print(u"Got argc/argv from shell params proto\n");
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*Argv = EfiShellInterfaceProtocol->Argv;
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return EfiShellInterfaceProtocol->Argc;
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}
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// shell 1.0 and 2.0 interfaces failed
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return GetShellArgcArgvFromLoadedImage(ImageHandle, Argv);
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}
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