os: InputThreadFillPipe doesn't need select or poll

The file descriptors passed to InputThreadFillPipe are always
blocking, so there's no need to use Select (or poll).

Signed-off-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>

1 files changed, 2 insertions, 16 deletions

diff --git a/os/inputthread.c b/os/inputthread.c
index 40a044375..a4266e92d 100644
--- a/os/inputthread.c
+++ b/os/inputthread.c
@@ -127,24 +127,10 @@ InputThreadFillPipe(int writeHead)
 {
     int ret;
     char byte = 0;
-    fd_set writePipe;
 
-    FD_ZERO(&writePipe);
-
-    while (1) {
+    do {
         ret = write(writeHead, &byte, 1);
-        if (!ret)
-            FatalError("input-thread: write() returned 0");
-        if (ret > 0)
-            break;
-
-        if (errno != EAGAIN)
-            FatalError("input-thread: filling pipe");
-
-        DebugF("input-thread: pipe full\n");
-        FD_SET(writeHead, &writePipe);
-        Select(writeHead + 1, NULL, &writePipe, NULL, NULL);
-    }
+    } while (ret < 0 && ETEST(errno));
 }
 
 /**