All the Executor source as-is from the subversion tree it was last worked on.

packages/box/Makefile

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+box.exe:	box.c
+	i486-pc-cygwin32-gcc -O -Wall -windows -o box.exe box.c

packages/box/box.c

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+/*
+ * box command...
+ * box -delete file command ...
+ *
+ * Runs command... and if "-delete file" is specified, deletes the
+ * file after the command has been run.  This is a Win32 program and
+ * by using it from within a DOS-based application it's possible to
+ * get the original DOS-based application to spawn a new box to run
+ * the command in.  Specifically this comes in handy with Executor.
+ */
+
+#include <windows.h>
+#include <nonansi/process.h>
+#include <nonansi/dir.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <ctype.h>
+
+/* Change CRLF to ' ', and drop trailing space.  The code below is overkill,
+   because when we read in "text" mode, CRLF gets converted to a single LF
+   which means we could just change that LF to a space in place, but I didn't
+   know that when I wrote the code. */
+
+static void
+change_crlf_to_space (char *p)
+{
+  char *ip, *op;
+  int last_was_space;
+
+  last_was_space = 0;
+  for (ip = p, op = p; *ip; ++ip)
+    {
+      switch (*ip)
+	{
+	case '\r':
+	case '\n':
+	  if (!last_was_space)
+	    {
+	      *op++ = ' ';
+	      last_was_space = 1;
+	    }
+	  break;
+	default:
+	  *op++ = *ip;
+	  last_was_space = 0;
+	  break;
+	}
+    }
+  if (last_was_space)
+    --op;
+  *op++ = 0;
+}
+
+int PASCAL
+WinMain(HINSTANCE hInst, HINSTANCE hPrev, LPSTR szCmdLine, int sw)
+{
+  char *p, *file_to_delete;
+  int mess_value;
+  FILE *message_fp;
+  
+  /*
+   * Format of box.txt: first line is name we should give to the new window
+   * succesive lines are coalesced into warning message that's presented to
+   * user.
+   */
+  
+  mess_value = IDCANCEL-1;
+  message_fp = fopen ("box.txt", "r");
+  if (message_fp)
+    {
+      char buf[1024];
+      size_t nread;
+      
+      nread = fread (buf, 1, sizeof buf, message_fp);
+      if (nread > 0)
+	{
+	  char *p;
+	  
+	  if (nread < sizeof buf)
+	    buf[nread] = 0;
+	  else
+	    buf[sizeof buf - 1] = 0;
+	  p = strchr (buf, '\n');
+	  if (p)
+	    {
+	      *p = 0;
+	      ++p;
+	      while (*p && isspace(*p))
+		++p;
+	      change_crlf_to_space (p);
+	      mess_value = MessageBox (NULL, p, buf,
+				       MB_ICONINFORMATION|MB_OKCANCEL);
+	    }
+	}
+    }
+  for (p = szCmdLine; *p && isspace (*p); ++p)
+    ;
+
+#define DELETE_TOKEN "-delete"
+
+  file_to_delete = 0;
+  if (strncasecmp (p, DELETE_TOKEN, sizeof (DELETE_TOKEN)-1) == 0)
+    {
+      p += sizeof (DELETE_TOKEN)-1;
+      if (!isspace (*p))
+	p = szCmdLine;
+      else
+	{
+	  while (*p && isspace (*p))
+	    ++p;
+	  if (*p)
+	    {
+	      file_to_delete = p;
+	      while (*p && !isspace (*p))
+		++p;
+	      if (*p)
+		{
+		  *p = 0;
+		  ++p;
+		}
+	    }
+	}	
+    }
+
+  if (mess_value == IDCANCEL)
+    {
+     if (file_to_delete)
+       DeleteFile (file_to_delete);
+    }
+  else
+    {
+      STARTUPINFO startinfo;
+      PROCESS_INFORMATION procinfo;
+      BOOL create_success;
+
+      memset (&startinfo, 0, sizeof startinfo);
+      startinfo.cb = sizeof startinfo;
+      startinfo.dwFlags = STARTF_USESHOWWINDOW;
+      startinfo.wShowWindow = SW_MINIMIZE;
+      create_success = CreateProcess (
+				      NULL,
+				      p,
+				      NULL,
+				      NULL,
+				      FALSE,
+				      0, /* DETACHED_PROCESS */
+				      NULL, /* environment */
+				      NULL, /* start dir "c:\\tts\\gs", */
+				      &startinfo,
+				      &procinfo
+				      );
+
+      if (create_success)
+	{
+	  CloseHandle (procinfo.hThread);
+	  WaitForSingleObject (procinfo.hProcess, INFINITE);
+	  CloseHandle (procinfo.hProcess);
+	  if (file_to_delete)
+	    DeleteFile (file_to_delete);
+	}
+    }
+  return 0;
+}