From: Ken Hornstein <kenh@pobox.com>
Date: Thu, 18 May 2017 01:40:57 +0000 (-0400)
Subject: Apparently on Linux if a slave pty is closed, instead of the master
X-Git-Url: https://diplodocus.org/git/nmh/commitdiff_plain/d11f8c6ba92fc28c3ea4d76676ff7d5148c36d7d?ds=inline

Apparently on Linux if a slave pty is closed, instead of the master
getting an EOF they get an EIO, which strikes me as unfriendly.  So
make sure we exit the main read loop without complaint on an EOF or
error.
---

diff --git a/test/runpty.c b/test/runpty.c
index a2fe6f48..e5de14e0 100644
--- a/test/runpty.c
+++ b/test/runpty.c
@@ -136,12 +136,7 @@ main(int argc, char *argv[])
 	if (cc > 0 && FD_ISSET(master, &readfds)) {
 	    cc = read(master, readbuf, sizeof(readbuf));
 
-	    if (cc < 0) {
-		fprintf(stderr, "read() failed: %s\n", strerror(errno));
-		exit(1);
-	    }
-
-	    if (cc == 0)
+	    if (cc <= 0)
 		break;
 
 	    fwrite(readbuf, 1, cc, output);