use Emacs in windowing (GUI) mode, and will not want to have an extra
console window lying around. */
-#define WIN32
+/*
+ You may want to define this if you want to be able to install updated
+ emacs binaries even when other users are using the current version.
+ The problem with some file servers (notably Novell) is that an open
+ file cannot be overwritten, deleted, or even renamed. So if someone
+ is running emacs.exe already, you cannot install a newer version.
+ By defining CHOOSE_NEWEST_EXE, you can name your new emacs.exe
+ something else which matches "emacs*.exe", and runemacs will
+ automatically select the newest emacs executeable in the bin directory.
+ (So you'll probably be able to delete the old version some hours/days
+ later).
+*/
+
+/* #define CHOOSE_NEWEST_EXE */
#include <windows.h>
#include <string.h>
SECURITY_DESCRIPTOR sec_desc;
PROCESS_INFORMATION child;
int wait_for_child = FALSE;
+ DWORD priority_class = NORMAL_PRIORITY_CLASS;
DWORD ret_code = 0;
- char * new_cmdline;
- char * p;
+ char *new_cmdline;
+ char *p;
char modname[MAX_PATH];
if (!GetModuleFileName (NULL, modname, MAX_PATH))
goto error;
*p = 0;
- new_cmdline = alloca (MAX_PATH + strlen (cmdline) + 1);
- strcpy (new_cmdline, modname);
- strcat (new_cmdline, "\\emacs.exe ");
+ new_cmdline = alloca (MAX_PATH + strlen (cmdline) + 3);
+ /* Quote executable name in case of spaces in the path. */
+ *new_cmdline = '"';
+ strcpy (new_cmdline + 1, modname);
- /* append original arguments if any; first look for -wait as first
- argument, and apply that ourselves */
- if (strncmp (cmdline, "-wait", 5) == 0)
+#ifdef CHOOSE_NEWEST_EXE
{
- wait_for_child = TRUE;
- cmdline += 5;
+ /* Silly hack to allow new versions to be installed on
+ server even when current version is in use. */
+
+ char * best_name = alloca (MAX_PATH + 1);
+ FILETIME best_time = {0,0};
+ WIN32_FIND_DATA wfd;
+ HANDLE fh;
+ p = new_cmdline + strlen (new_cmdline);
+ strcpy (p, "\\emacs*.exe\" ");
+ fh = FindFirstFile (new_cmdline, &wfd);
+ if (fh == INVALID_HANDLE_VALUE)
+ goto error;
+ do
+ {
+ if (wfd.ftLastWriteTime.dwHighDateTime > best_time.dwHighDateTime
+ || (wfd.ftLastWriteTime.dwHighDateTime == best_time.dwHighDateTime
+ && wfd.ftLastWriteTime.dwLowDateTime > best_time.dwLowDateTime))
+ {
+ best_time = wfd.ftLastWriteTime;
+ strcpy (best_name, wfd.cFileName);
+ }
+ }
+ while (FindNextFile (fh, &wfd));
+ FindClose (fh);
+ *p++ = '\\';
+ strcpy (p, best_name);
+ strcat (p, " ");
}
+#else
+ strcat (new_cmdline, "\\emacs.exe\" ");
+#endif
+
+ /* Append original arguments if any; first look for arguments we
+ recognise (-wait, -high, and -low), and apply them ourselves. */
+ while (cmdline[0] == '-' || cmdline[0] == '/')
+ {
+ if (strncmp (cmdline+1, "wait", 4) == 0)
+ {
+ wait_for_child = TRUE;
+ cmdline += 5;
+ }
+ else if (strncmp (cmdline+1, "high", 4) == 0)
+ {
+ priority_class = HIGH_PRIORITY_CLASS;
+ cmdline += 5;
+ }
+ else if (strncmp (cmdline+1, "low", 3) == 0)
+ {
+ priority_class = IDLE_PRIORITY_CLASS;
+ cmdline += 4;
+ }
+ else
+ break;
+ }
strcat (new_cmdline, cmdline);
- /* set emacs_dir variable if runemacs was in "%emacs_dir%\bin" */
+ /* Set emacs_dir variable if runemacs was in "%emacs_dir%\bin". */
if ((p = strrchr (modname, '\\')) && stricmp (p, "\\bin") == 0)
- {
- *p = 0;
- SetEnvironmentVariable ("emacs_dir", modname);
- }
+ {
+ *p = 0;
+ for (p = modname; *p; p++)
+ if (*p == '\\') *p = '/';
+ SetEnvironmentVariable ("emacs_dir", modname);
+ }
memset (&start, 0, sizeof (start));
start.cb = sizeof (start);
sec_attrs.lpSecurityDescriptor = NULL;
sec_attrs.bInheritHandle = FALSE;
- if (CreateProcess (NULL, new_cmdline, &sec_attrs, NULL, TRUE, 0,
- NULL, NULL, &start, &child))
+ if (CreateProcess (NULL, new_cmdline, &sec_attrs, NULL, TRUE, priority_class,
+ GetEnvironmentStrings (), NULL, &start, &child))
{
if (wait_for_child)
{