152 lines
6.8 KiB
C
152 lines
6.8 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ This program is free software; you can redistribute it and/or modify │
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│ it under the terms of the GNU General Public License as published by │
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│ the Free Software Foundation; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ WITHOUT ANY WARRANTY; without even the implied warranty of │
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│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
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│ General Public License for more details. │
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│ │
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│ You should have received a copy of the GNU General Public License │
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│ along with this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/bits/bits.h"
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#include "libc/bits/pushpop.h"
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#include "libc/bits/weaken.h"
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#include "libc/dce.h"
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#include "libc/nt/console.h"
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#include "libc/nt/enum/consolemodeflags.h"
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#include "libc/nt/enum/filetype.h"
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#include "libc/nt/enum/loadlibrarysearch.h"
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#include "libc/nt/files.h"
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#include "libc/nt/pedef.h"
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#include "libc/nt/process.h"
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#include "libc/nt/runtime.h"
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#include "libc/nt/struct/teb.h"
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#include "libc/runtime/getdosenviron.h"
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#include "libc/runtime/internal.h"
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#include "libc/runtime/missioncritical.h"
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#include "libc/runtime/runtime.h"
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static struct CmdExe {
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bool result;
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struct OldNtConsole {
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uint32_t codepage;
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uint32_t mode;
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int64_t handle;
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} oldin, oldout;
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} g_cmdexe;
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static textwindows void MitigateDriveByDownloads(void) {
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unsigned wrote;
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if (!SetDefaultDllDirectories(kNtLoadLibrarySearchSearchSystem32)) {
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WriteFile(GetStdHandle(kNtStdErrorHandle), "nodll\n", 6, &wrote, NULL);
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ExitProcess(1);
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}
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}
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static textwindows void RestoreCmdExe(void) {
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if (g_cmdexe.oldin.handle) {
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SetConsoleCP(g_cmdexe.oldin.codepage);
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SetConsoleMode(g_cmdexe.oldin.handle, g_cmdexe.oldin.mode);
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}
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if (g_cmdexe.oldout.handle) {
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SetConsoleOutputCP(g_cmdexe.oldout.codepage);
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SetConsoleMode(g_cmdexe.oldout.handle, g_cmdexe.oldout.mode);
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}
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}
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static textwindows void SetTrueColor(void) {
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SetEnvironmentVariable(u"TERM", u"xterm-truecolor");
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}
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static textwindows void NormalizeCmdExe(void) {
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int64_t handle, hstdin, hstdout, hstderr;
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if ((int)weakaddr("v_ntsubsystem") == kNtImageSubsystemWindowsCui &&
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NtGetVersion() >= kNtVersionWindows10) {
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atexit(RestoreCmdExe);
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hstdin = GetStdHandle(pushpop(kNtStdInputHandle));
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hstdout = GetStdHandle(pushpop(kNtStdOutputHandle));
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hstderr = GetStdHandle(pushpop(kNtStdErrorHandle));
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if (GetFileType((handle = hstdin)) == kNtFileTypeChar) {
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SetTrueColor();
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g_cmdexe.oldin.handle = handle;
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g_cmdexe.oldin.codepage = GetConsoleCP();
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SetConsoleCP(kNtCpUtf8);
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GetConsoleMode(handle, &g_cmdexe.oldin.mode);
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SetConsoleMode(handle, g_cmdexe.oldin.mode | kNtEnableProcessedInput |
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kNtEnableEchoInput | kNtEnableLineInput |
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kNtEnableWindowInput |
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kNtEnableVirtualTerminalInput);
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}
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if (GetFileType((handle = hstdout)) == kNtFileTypeChar ||
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GetFileType((handle = hstderr)) == kNtFileTypeChar) {
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SetTrueColor();
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g_cmdexe.oldout.handle = handle;
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g_cmdexe.oldout.codepage = GetConsoleOutputCP();
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SetConsoleOutputCP(kNtCpUtf8);
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GetConsoleMode(handle, &g_cmdexe.oldout.mode);
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SetConsoleMode(handle, g_cmdexe.oldout.mode | kNtEnableProcessedOutput |
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kNtEnableWrapAtEolOutput |
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(NtGetVersion() >= kNtVersionWindows10
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? kNtEnableVirtualTerminalProcessing
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: 0));
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}
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}
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}
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/**
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* Main function on Windows NT.
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*
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* The Cosmopolitan Runtime provides the following services, which aim
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* to bring Windows NT behavior closer in harmony with System Five:
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*
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* 1. We configure CMD.EXE for UTF-8 and enable ANSI colors on Win10.
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*
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* 2. Command line arguments are passed as a blob of UTF-16 text. We
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* chop them up into an char *argv[] UTF-8 data structure, in
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* accordance with the DOS conventions for argument quoting.
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*
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* 3. Environment variables are passed to us as a sorted UTF-16 double
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* NUL terminated list. We translate this to char ** using UTF-8.
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*
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* 4. NT likes to choose a stack address that's beneath the program
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* image. We want to be able to assume that stack addresses are
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* located at higher addresses than heap and program memory. So the
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* _executive() function will switch stacks appropriately.
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*
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* 5. Windows users are afraid of "drive-by downloads" where someone
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* might accidentally an evil DLL to their Downloads folder which
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* then overrides the behavior of a legitimate EXE being run from
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* the downloads folder. Since we don't even use dynamic linking,
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* we've cargo culted some API calls, that may harden against it.
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*
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*/
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textwindows int WinMain(void *hInstance, void *hPrevInstance,
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const char *lpCmdLine, int nCmdShow) {
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int i, count;
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const char16_t *cmd16, *env16;
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char *argarray[512], *envarray[512];
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char argblock[ARG_MAX], envblock[ENV_MAX];
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long auxarray[][2] = {{pushpop(0L), pushpop(0L)}};
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MitigateDriveByDownloads();
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NormalizeCmdExe();
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*(/*unconst*/ int *)&hostos = WINDOWS;
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cmd16 = GetCommandLine();
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env16 = GetEnvironmentStrings();
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count = GetDosArgv(cmd16, argblock, ARG_MAX, argarray, 512);
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for (i = 0; argarray[0][i]; ++i) {
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if (argarray[0][i] == '\\') argarray[0][i] = '/';
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}
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GetDosEnviron(env16, envblock, ENV_MAX, envarray, 512);
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FreeEnvironmentStrings(env16);
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_executive(count, argarray, envarray, auxarray);
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}
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