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authorrjohnson <rjohnson>1998-03-26 14:56:55 (GMT)
committerrjohnson <rjohnson>1998-03-26 14:56:55 (GMT)
commit72d823b9193f9ee2b0318563b49363cd08c11f24 (patch)
treec168cc164a71f320db9dcdfe7518ba7bd0d2c8d9 /win/stub16.c
parent2b5738da524e944cda39e24c0a87b745a43bd8c3 (diff)
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Initial revision
Diffstat (limited to 'win/stub16.c')
-rw-r--r--win/stub16.c198
1 files changed, 198 insertions, 0 deletions
diff --git a/win/stub16.c b/win/stub16.c
new file mode 100644
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--- /dev/null
+++ b/win/stub16.c
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+/*
+ * stub16.c
+ *
+ * A helper program used for running 16-bit DOS applications under
+ * Windows 95.
+ *
+ * Copyright (c) 1996 by Sun Microsystems, Inc.
+ *
+ * See the file "license.terms" for information on usage and redistribution
+ * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ *
+ * SCCS: @(#) stub16.c 1.5 96/12/11 20:01:58
+ */
+
+#define STRICT
+
+#include <windows.h>
+#include <stdio.h>
+
+static HANDLE CreateTempFile(void);
+
+/*
+ *---------------------------------------------------------------------------
+ *
+ * main
+ *
+ * Entry point for the 32-bit console mode app used by Windows 95 to
+ * help run the 16-bit program specified on the command line.
+ *
+ * 1. EOF on a pipe that connects a detached 16-bit process and a
+ * 32-bit process is never seen. So, this process runs the 16-bit
+ * process _attached_, and then it is run detached from the calling
+ * 32-bit process.
+ *
+ * 2. If a 16-bit process blocks reading from or writing to a pipe,
+ * it never wakes up, and eventually brings the whole system down
+ * with it if you try to kill the process. This app simulates
+ * pipes. If any of the stdio handles is a pipe, this program
+ * accumulates information into temp files and forwards it to or
+ * from the DOS application as appropriate. This means that this
+ * program must receive EOF from a stdin pipe before it will actually
+ * start the DOS app, and the DOS app must finish generating stdout
+ * or stderr before the data will be sent to the next stage of the
+ * pipe. If the stdio handles are not pipes, no accumulation occurs
+ * and the data is passed straight through to and from the DOS
+ * application.
+ *
+ * Results:
+ * None.
+ *
+ * Side effects:
+ * The child process is created and this process waits for it to
+ * complete.
+ *
+ *---------------------------------------------------------------------------
+ */
+
+int
+main()
+{
+ DWORD dwRead, dwWrite;
+ char *cmdLine;
+ HANDLE hStdInput, hStdOutput, hStdError;
+ HANDLE hFileInput, hFileOutput, hFileError;
+ STARTUPINFO si;
+ PROCESS_INFORMATION pi;
+ char buf[8192];
+ DWORD result;
+
+ hFileInput = INVALID_HANDLE_VALUE;
+ hFileOutput = INVALID_HANDLE_VALUE;
+ hFileError = INVALID_HANDLE_VALUE;
+ result = 1;
+
+ /*
+ * Don't get command line from argc, argv, because the command line
+ * tokenizer will have stripped off all the escape sequences needed
+ * for quotes and backslashes, and then we'd have to put them all
+ * back in again. Get the raw command line and parse off what we
+ * want ourselves. The command line should be of the form:
+ *
+ * stub16.exe program arg1 arg2 ...
+ */
+
+ cmdLine = strchr(GetCommandLine(), ' ');
+ if (cmdLine == NULL) {
+ return 1;
+ }
+ cmdLine++;
+
+ hStdInput = GetStdHandle(STD_INPUT_HANDLE);
+ hStdOutput = GetStdHandle(STD_OUTPUT_HANDLE);
+ hStdError = GetStdHandle(STD_ERROR_HANDLE);
+
+ if (GetFileType(hStdInput) == FILE_TYPE_PIPE) {
+ hFileInput = CreateTempFile();
+ if (hFileInput == INVALID_HANDLE_VALUE) {
+ goto cleanup;
+ }
+ while (ReadFile(hStdInput, buf, sizeof(buf), &dwRead, NULL) != FALSE) {
+ if (dwRead == 0) {
+ break;
+ }
+ if (WriteFile(hFileInput, buf, dwRead, &dwWrite, NULL) == FALSE) {
+ goto cleanup;
+ }
+ }
+ SetFilePointer(hFileInput, 0, 0, FILE_BEGIN);
+ SetStdHandle(STD_INPUT_HANDLE, hFileInput);
+ }
+ if (GetFileType(hStdOutput) == FILE_TYPE_PIPE) {
+ hFileOutput = CreateTempFile();
+ if (hFileOutput == INVALID_HANDLE_VALUE) {
+ goto cleanup;
+ }
+ SetStdHandle(STD_OUTPUT_HANDLE, hFileOutput);
+ }
+ if (GetFileType(hStdError) == FILE_TYPE_PIPE) {
+ hFileError = CreateTempFile();
+ if (hFileError == INVALID_HANDLE_VALUE) {
+ goto cleanup;
+ }
+ SetStdHandle(STD_ERROR_HANDLE, hFileError);
+ }
+
+ ZeroMemory(&si, sizeof(si));
+ si.cb = sizeof(si);
+ if (CreateProcess(NULL, cmdLine, NULL, NULL, TRUE, 0, NULL, NULL, &si,
+ &pi) == FALSE) {
+ goto cleanup;
+ }
+
+ WaitForInputIdle(pi.hProcess, 5000);
+ WaitForSingleObject(pi.hProcess, INFINITE);
+ CloseHandle(pi.hProcess);
+ CloseHandle(pi.hThread);
+ result = 0;
+
+ if (hFileOutput != INVALID_HANDLE_VALUE) {
+ SetFilePointer(hFileOutput, 0, 0, FILE_BEGIN);
+ while (ReadFile(hFileOutput, buf, sizeof(buf), &dwRead, NULL) != FALSE) {
+ if (dwRead == 0) {
+ break;
+ }
+ if (WriteFile(hStdOutput, buf, dwRead, &dwWrite, NULL) == FALSE) {
+ break;
+ }
+ }
+ }
+ if (hFileError != INVALID_HANDLE_VALUE) {
+ SetFilePointer(hFileError, 0, 0, FILE_BEGIN);
+ while (ReadFile(hFileError, buf, sizeof(buf), &dwRead, NULL) != FALSE) {
+ if (dwRead == 0) {
+ break;
+ }
+ if (WriteFile(hStdError, buf, dwRead, &dwWrite, NULL) == FALSE) {
+ break;
+ }
+ }
+ }
+
+cleanup:
+ if (hFileInput != INVALID_HANDLE_VALUE) {
+ CloseHandle(hFileInput);
+ }
+ if (hFileOutput != INVALID_HANDLE_VALUE) {
+ CloseHandle(hFileOutput);
+ }
+ if (hFileError != INVALID_HANDLE_VALUE) {
+ CloseHandle(hFileError);
+ }
+ CloseHandle(hStdInput);
+ CloseHandle(hStdOutput);
+ CloseHandle(hStdError);
+ ExitProcess(result);
+ return 1;
+}
+
+static HANDLE
+CreateTempFile()
+{
+ char name[MAX_PATH];
+ SECURITY_ATTRIBUTES sa;
+
+ if (GetTempPath(sizeof(name), name) == 0) {
+ return INVALID_HANDLE_VALUE;
+ }
+ if (GetTempFileName(name, "tcl", 0, name) == 0) {
+ return INVALID_HANDLE_VALUE;
+ }
+
+ sa.nLength = sizeof(sa);
+ sa.lpSecurityDescriptor = NULL;
+ sa.bInheritHandle = TRUE;
+ return CreateFile(name, GENERIC_READ | GENERIC_WRITE, 0, &sa,
+ CREATE_ALWAYS, FILE_ATTRIBUTE_TEMPORARY | FILE_FLAG_DELETE_ON_CLOSE,
+ NULL);
+}