(read_avail_input): Check for failure with EIO.

diff --git a/src/keyboard.c b/src/keyboard.c
index 50f20d639fdb0046bf7cac68146bf1218a5e7abc..0303ab4fa6504b65989bbd1da9333cc61bce8e86 100644 (file)
--- 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