From: Richard M. Stallman <rms@gnu.org>
Date: Mon, 23 Jun 1997 02:39:44 +0000 (+0000)
Subject: (read_avail_input): Check for failure with EIO.
X-Git-Tag: emacs-20.1~1541
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=498545661afb521e84a57bcf7066186c357803c5;p=emacs.git

(read_avail_input): Check for failure with EIO.
---

diff --git a/src/keyboard.c b/src/keyboard.c
index 50f20d639fd..0303ab4fa65 100644
--- a/src/keyboard.c
+++ b/src/keyboard.c
@@ -4924,6 +4924,13 @@ read_avail_input (expected)
 #else
 	  nread = read (input_fd, cbuf, n_to_read);
 #endif
+	  /* POSIX infers that processes which are not in the session leader's
+	     process group won't get SIGHUP's at logout time.  BSDI adheres to
+	     this part standard and returns -1 from read(0) with errno==EIO
+	     when the control tty is taken away.
+	     Jeffrey Honig <jch@bsdi.com> says this is generally safe.  */
+	  if (nread == -1 && errno == EIO)
+	    kill (0, SIGHUP);
 #if defined (AIX) && (! defined (aix386) && defined (_BSD))
 	  /* The kernel sometimes fails to deliver SIGHUP for ptys.
 	     This looks incorrect, but it isn't, because _BSD causes