tif isatty() first read from stdin and then grab the keyboard, otherwise first grab the keyboard and then read from stdin - dmenu - Dmenu fork with xft fonts.
 (HTM) git clone git://r-36.net/dmenu
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       ---
 (DIR) commit 8a066fabd9796ca80f5a359c3c6cf57c947b1b95
 (DIR) parent 6c0e05eb0d297a0d26080bea3b6040ab14ad65ae
 (HTM) Author: Anselm R. Garbe <arg@suckless.org>
       Date:   Mon, 26 Feb 2007 11:44:41 +0100
       
       if isatty() first read from stdin and then grab the keyboard, otherwise first grab the keyboard and then read from stdin
       Diffstat:
         main.c                              |      27 +++++++++++++++++----------
       
       1 file changed, 17 insertions(+), 10 deletions(-)
       ---
 (DIR) diff --git a/main.c b/main.c
       t@@ -108,6 +108,13 @@ drawmenu(void) {
                XFlush(dpy);
        }
        
       +static void
       +grabkeyboard(void) {
       +        while(XGrabKeyboard(dpy, root, True, GrabModeAsync,
       +                         GrabModeAsync, CurrentTime) != GrabSuccess)
       +                usleep(1000);
       +}
       +
        static unsigned long
        initcolor(const char *colstr) {
                Colormap cmap = DefaultColormap(dpy, screen);
       t@@ -418,12 +425,6 @@ main(int argc, char *argv[]) {
                XModifierKeymap *modmap;
                XSetWindowAttributes wa;
        
       -        if(argc == 2 && !strncmp("-v", argv[1], 3))
       -                eprint("dmenu-"VERSION", (C)opyright MMVI-MMVII Anselm R. Garbe\n");
       -        else if(isatty(STDIN_FILENO)) {
       -                fputs("error: dmenu can't run in an interactive shell\n", stdout);
       -                usage();
       -        }
                /* command line args */
                for(i = 1; i < argc; i++)
                        if(!strncmp(argv[i], "-b", 3)) {
       t@@ -447,6 +448,8 @@ main(int argc, char *argv[]) {
                        else if(!strncmp(argv[i], "-sf", 4)) {
                                if(++i < argc) selfg = argv[i];
                        }
       +                else if(!strncmp(argv[i], "-v", 3))
       +                        eprint("dmenu-"VERSION", (C)opyright MMVI-MMVII Anselm R. Garbe\n");
                        else
                                usage();
                setlocale(LC_CTYPE, "");
       t@@ -455,10 +458,14 @@ main(int argc, char *argv[]) {
                        eprint("dmenu: cannot open display\n");
                screen = DefaultScreen(dpy);
                root = RootWindow(dpy, screen);
       -        while(XGrabKeyboard(dpy, root, True, GrabModeAsync,
       -                         GrabModeAsync, CurrentTime) != GrabSuccess)
       -                usleep(1000);
       -        maxname = readstdin();
       +        if(isatty(STDIN_FILENO)) {
       +                maxname = readstdin();
       +                grabkeyboard();
       +        }
       +        else { /* prevent keypress loss */
       +                grabkeyboard();
       +                maxname = readstdin();
       +        }
                /* init modifier map */
                modmap = XGetModifierMapping(dpy);
                for (i = 0; i < 8; i++) {