Some X apps and window managers accept a "-display" command line
option. Some use "--display". All appear to honor the DISPLAY
environmental variable.
This bit me some time ago with the Debian menu system, which
facilitates changing window managers on-the-fly. Switching to
e went horribly wrong because it didn't know what DISPLAY to use.
There may be a better way to do this, but no one has complained
in the couple of years that I've carried the patch.
--- enlightenment-0.16.6-upstream/src/session.c 2003-11-05 12:58:51.000000000 -0500
+++ enlightenment-0.16.6-debian/src/session.c 2003-11-06 05:07:03.000000000 -0500
@@ -1196,7 +1196,7 @@
#endif
XCloseDisplay(disp);
disp = NULL;
- Esnprintf(s, sizeof(s), "exec %s -display %s", atword(params, 2), dstr);
+ Esnprintf(s, sizeof(s), "DISPLAY=%s exec %s", dstr, atword(params, 2));
execl(DEFAULT_SH_PATH, DEFAULT_SH_PATH, "-c", s, NULL);
}
else if (!strcmp(s, "restart"))
