libc/termios: Implement TCSADRAIN and TCSAFLUSH for tcsetattr

Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com> Change-Id: If87a4931cd5a55e064f58c19a22c7ce13f538000
2021-05-07 00:39:08 -07:00 · 2021-05-07 00:39:08 -07:00 · b8ed17b9da
parent bf733f7213
commit b8ed17b9da
1 changed files with 8 additions and 3 deletions
--- a/libs/libc/termios/lib_tcsetattr.c
+++ b/libs/libc/termios/lib_tcsetattr.c
@ -83,10 +83,15 @@

 int tcsetattr(int fd, int options, FAR const struct termios *termiosp)
 {
-  if (options == TCSANOW)
+  if (options != TCSANOW)
    {
-      return ioctl(fd, TCSETS, (unsigned long)termiosp);
+      tcdrain(fd);
    }

-  return -ENOSYS;
+  if (options == TCSAFLUSH)
+    {
+      tcflush(fd, TCIFLUSH);
+    }
+
+  return ioctl(fd, TCSETS, (unsigned long)termiosp);
 }