[hackers] [dmenu] Use slow path if stdin is a tty || dok

[git]

commit 11a65377da8fc198d15cf041dbbbb9718e5798cd
Author:     dok <d...@grehack.fr>
AuthorDate: Sat Jan 26 15:49:15 2019 +0100
Commit:     Hiltjo Posthuma <hil...@codemadness.org>
CommitDate: Sun Jan 27 15:26:04 2019 +0100

    Use slow path if stdin is a tty
    
    If stdin is a tty and dmenu is ran with the fast option then it's
    impossible to close stdin because the keyboard is already grabbed.

diff --git a/dmenu.c b/dmenu.c
index 5c835dd..6b8f51b 100644
--- a/dmenu.c
+++ b/dmenu.c
@@ -6,9 +6,7 @@
 #include <string.h>
 #include <strings.h>
 #include <time.h>
-#ifdef __OpenBSD__
 #include <unistd.h>
-#endif
 
 #include <X11/Xlib.h>
 #include <X11/Xatom.h>
@@ -754,7 +752,7 @@ main(int argc, char *argv[])
                die("pledge");
 #endif
 
-       if (fast) {
+       if (fast && !isatty(0)) {
                grabkeyboard();
                readstdin();
        } else {