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-rw-r--r--docs/ctty.htm4
1 files changed, 3 insertions, 1 deletions
diff --git a/docs/ctty.htm b/docs/ctty.htm
index 26d2c7956..b8bce003c 100644
--- a/docs/ctty.htm
+++ b/docs/ctty.htm
@@ -365,7 +365,7 @@ this is a great mystery.
becomes its controlling tty.
</p><p>The BSD approach is that one has to explicitly call
</p><blockquote>
-<pre>ioctl(fd, TIOCSCTTY, ...);
+<pre>ioctl(fd, TIOCSCTTY, 0/1);
</pre>
</blockquote>
@@ -378,6 +378,8 @@ and (ii) it does not yet have a controlling tty, and
(iii) maybe the tty should not already control some other session;
if it does it is an error if we aren't root, or we steal the tty
if we are all-powerful.
+[vda: correction: third parameter controls this: if 1, we steal tty from
+any such session, if 0, we don't steal]
</p><p>Opening some terminal will give us a controlling tty,
provided that (i) the current process is a session leader, and
(ii) it does not yet have a controlling tty, and