+static void commonfatalbox(char *p, va_list ap)
+{
+ char errorbuf[2048];
+ NSAlert *alert;
+
+ /*
+ * We may have come here because we ran out of memory, in which
+ * case it's entirely likely that that further memory
+ * allocations will fail. So (a) we use vsnprintf to format the
+ * error message rather than the usual dupvprintf; and (b) we
+ * have a fallback way to get the message out via stderr if
+ * even creating an NSAlert fails.
+ */
+ vsnprintf(errorbuf, lenof(errorbuf), p, ap);
+
+ alert = [NSAlert alloc];
+ if (!alert) {
+ fprintf(stderr, "fatal error (and NSAlert failed): %s\n", errorbuf);
+ } else {
+ alert = [[alert init] autorelease];
+ [alert addButtonWithTitle:@"Terminate"];
+ [alert setInformativeText:[NSString stringWithCString:errorbuf]];
+ [alert runModal];
+ }
+ exit(1);
+}
+
+void fatalbox(char *p, ...)