Staging
v0.8.1
v0.8.1
https://github.com/python/cpython
Tip revision: 74f4bd53e03ded8408bcc2de67cf0f5a4ac5b1a1 authored by Barry Warsaw on 23 February 2012, 15:59:38 UTC
Bump some more copyright years (as per PEP 101), since this is the first
Bump some more copyright years (as per PEP 101), since this is the first
Tip revision: 74f4bd5
w9xpopen.c
/*
* w9xpopen.c
*
* Serves as an intermediate stub Win32 console application to
* avoid a hanging pipe when redirecting 16-bit console based
* programs (including MS-DOS console based programs and batch
* files) on Window 95 and Windows 98.
*
* This program is to be launched with redirected standard
* handles. It will launch the command line specified 16-bit
* console based application in the same console, forwarding
* its own redirected standard handles to the 16-bit child.
* AKA solution to the problem described in KB: Q150956.
*/
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <stdio.h>
#include <stdlib.h> /* for malloc and its friends */
const char *usage =
"This program is used by Python's os.popen function\n"
"to work around a limitation in Windows 95/98. It is\n"
"not designed to be used as a stand-alone program.";
int main(int argc, char *argv[])
{
BOOL bRet;
STARTUPINFO si;
PROCESS_INFORMATION pi;
DWORD exit_code=0;
size_t cmdlen = 0;
int i;
char *cmdline, *cmdlinefill;
if (argc < 2) {
if (GetFileType(GetStdHandle(STD_INPUT_HANDLE))==FILE_TYPE_CHAR)
/* Attached to a console, and therefore not executed by Python
Display a message box for the inquisitive user
*/
MessageBox(NULL, usage, argv[0], MB_OK);
else {
/* Eeek - executed by Python, but args are screwed!
Write an error message to stdout so there is at
least some clue for the end user when it appears
in their output.
A message box would be hidden and blocks the app.
*/
fprintf(stdout, "Internal popen error - no args specified\n%s\n", usage);
}
return 1;
}
/* Build up the command-line from the args.
Args with a space are quoted, existing quotes are escaped.
To keep things simple calculating the buffer size, we assume
every character is a quote - ie, we allocate double what we need
in the worst case. As this is only double the command line passed
to us, there is a good chance this is reasonably small, so the total
allocation will almost always be < 512 bytes.
*/
for (i=1;i<argc;i++)
cmdlen += strlen(argv[i])*2 + 3; /* one space, maybe 2 quotes */
cmdline = cmdlinefill = (char *)malloc(cmdlen+1);
if (cmdline == NULL)
return -1;
for (i=1;i<argc;i++) {
const char *arglook;
int bQuote = strchr(argv[i], ' ') != NULL;
if (bQuote)
*cmdlinefill++ = '"';
/* escape quotes */
for (arglook=argv[i];*arglook;arglook++) {
if (*arglook=='"')
*cmdlinefill++ = '\\';
*cmdlinefill++ = *arglook;
}
if (bQuote)
*cmdlinefill++ = '"';
*cmdlinefill++ = ' ';
}
*cmdlinefill = '\0';
/* Make child process use this app's standard files. */
ZeroMemory(&si, sizeof si);
si.cb = sizeof si;
si.dwFlags = STARTF_USESTDHANDLES;
si.hStdInput = GetStdHandle(STD_INPUT_HANDLE);
si.hStdOutput = GetStdHandle(STD_OUTPUT_HANDLE);
si.hStdError = GetStdHandle(STD_ERROR_HANDLE);
bRet = CreateProcess(
NULL, cmdline,
NULL, NULL,
TRUE, 0,
NULL, NULL,
&si, &pi
);
free(cmdline);
if (bRet) {
if (WaitForSingleObject(pi.hProcess, INFINITE) != WAIT_FAILED) {
GetExitCodeProcess(pi.hProcess, &exit_code);
}
CloseHandle(pi.hProcess);
CloseHandle(pi.hThread);
return exit_code;
}
return 1;
}