1 files changed, 7 insertions, 1 deletions

diff --git a/shell/shell_common.c b/shell/shell_common.c
index 4329ca05c..0ffe21e0b 100644
--- a/shell/shell_common.c
+++ b/shell/shell_common.c
@@ -138,7 +138,13 @@ shell_builtin_read(void FAST_FUNC (*setvar)(const char *name, const char *val),
                 old_tty = tty;
                 if (nchars) {
                         tty.c_lflag &= ~ICANON;
-                        tty.c_cc[VMIN] = nchars < 256 ? nchars : 255;
+                        // Setting it to more than 1 breaks poll():
+                        // it blocks even if there's data. !??
+                        //tty.c_cc[VMIN] = nchars < 256 ? nchars : 255;
+                        /* reads would block only if < 1 char is available */
+                        tty.c_cc[VMIN] = 1;
+                        /* no timeout (reads block forever) */
+                        tty.c_cc[VTIME] = 0;
                 }
                 if (read_flags & BUILTIN_READ_SILENT) {
                         tty.c_lflag &= ~(ECHO | ECHOK | ECHONL);