From: jpellegrini <j_p@aleph0.info>
Date: Mon, 4 Apr 2022 00:23:55 +0000 (-0300)
Subject: Make sure terminal output is unbuffered on POSIX systems (#110)
X-Git-Url: https://git.gag.com/?a=commitdiff_plain;h=fa8de1fa6ddd9d3c394b851ba87db15a22505bea;p=debian%2Fpforth

Make sure terminal output is unbuffered on POSIX systems (#110)

Call setvbuf on terminal initialization in
csrc/posix/pf_io_posix.c. At least on one platform (OpenWRT),
pForth was buffering the characters while the user typed,
instead of echoing them immediately; this fixes that issue.

Fixes #109
Fixes #87
---

diff --git a/csrc/posix/pf_io_posix.c b/csrc/posix/pf_io_posix.c
index bd0c50e..156e860 100644
--- a/csrc/posix/pf_io_posix.c
+++ b/csrc/posix/pf_io_posix.c
@@ -131,6 +131,10 @@ void sdTerminalInit(void)
         {
             perror("sdTerminalInit: tcsetattr");
         }
+        if (setvbuf(stdout, NULL, _IONBF, (size_t) 0) != 0)
+        {
+            perror("sdTerminalInit: setvbuf");
+        }
     }
 }