diff options
Diffstat (limited to 'tcl/win/stub16.c')
| -rw-r--r-- | tcl/win/stub16.c | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/tcl/win/stub16.c b/tcl/win/stub16.c new file mode 100644 index 00000000000..2138d508017 --- /dev/null +++ b/tcl/win/stub16.c @@ -0,0 +1,198 @@ +/* + * 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. + * + * RCS: @(#) $Id$ + */ + +#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); +} |