Mention that keyboard input does not work with "pintos -v".

[pintos-anon] / doc / userprog.texi

diff --git a/doc/userprog.texi b/doc/userprog.texi
index ab6115ce6c67b348a40f5eb1c7e9707c8e1d29c9..d401fda025f1f98b81ed78a31c743ccbd30bf68e 100644 (file)
--- a/doc/userprog.texi
+++ b/doc/userprog.texi
@@ -599,7 +599,7 @@ the program cannot load or run for any reason.
 @deftypefn {System Call} int wait (pid_t @var{pid})
 Waits for process @var{pid} to die and returns the status it passed to
 @code{exit}.  Returns -1 if @var{pid}
-was terminated by the kernel (i.e.@: killed due to an exception).  If
+was terminated by the kernel (e.g.@: killed due to an exception).  If
 @var{pid} is does not refer to a child of the
 calling thread, or if @code{wait} has already been successfully
 called for the given @var{pid}, returns -1 immediately, without
@@ -665,7 +665,8 @@ Reads @var{size} bytes from the file open as @var{fd} into
 @var{buffer}.  Returns the number of bytes actually read (0 at end of
 file), or -1 if the file could not be read (due to a condition other
 than end of file).  Fd 0 reads from the keyboard using
-@func{kbd_getc}.
+@func{kbd_getc}.  (Keyboard input will not work if you pass the
+@option{-v} option to @command{pintos}.)
 
 Consider implementing this function in terms of @func{file_read}.
 @end deftypefn