From: simon <simon@cda61777-01e9-0310-a592-d414129be87e>
Date: Sat, 6 Nov 2010 17:22:38 +0000 (+0000)
Subject: David Laight reports that sometimes reads on a serial port will
X-Git-Url: https://git.distorted.org.uk/~mdw/sgt/putty/commitdiff_plain/0620c88abd34d2aa7d47bb9dfd383be247728185

David Laight reports that sometimes reads on a serial port will
attempt to block, and hence return EAGAIN/EWOULDBLOCK, in spite of
the port having been reported readable by select(2). Don't treat
those errors as fatal.


git-svn-id: svn://svn.tartarus.org/sgt/putty@9020 cda61777-01e9-0310-a592-d414129be87e
---

diff --git a/unix/uxser.c b/unix/uxser.c
index 92961a7d..22f4a065 100644
--- a/unix/uxser.c
+++ b/unix/uxser.c
@@ -342,6 +342,14 @@ static int serial_select_result(int fd, int event)
 	     */
 	    finished = TRUE;
 	} else if (ret < 0) {
+#ifdef EAGAIN
+	    if (errno == EAGAIN)
+		return 1;	       /* spurious */
+#endif
+#ifdef EWOULDBLOCK
+	    if (errno == EWOULDBLOCK)
+		return 1;	       /* spurious */
+#endif
 	    perror("read serial port");
 	    exit(1);
 	} else if (ret > 0) {