(read_avail_input): Check for failure with EIO.

1 files changed, 7 insertions, 0 deletions

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