1 files changed, 112 insertions, 0 deletions
diff --git a/PC/w9xpopen.c b/PC/w9xpopen.c
new file mode 100644
index 0000000..b3978dd
--- /dev/null
+++ b/PC/w9xpopen.c
@@ -0,0 +1,112 @@
+/*
+ * 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;
+}