[PATCH] ttyslot.3: Add description of the function is not thread-safe

[Peng Haitao <penght-BthXqXjhjHXQFUHtdCDX3A@public.gmane.org>]

The function calls thread-unsafe function, so it is not thread-safe.

Signed-off-by: Peng Haitao <penght-BthXqXjhjHXQFUHtdCDX3A@public.gmane.org>
---
 man3/ttyslot.3 |    9 ++++++++-
 1 files changed, 8 insertions(+), 1 deletions(-)

diff --git a/man3/ttyslot.3 b/man3/ttyslot.3
index 516366d..5fa8c25 100644
--- a/man3/ttyslot.3
+++ b/man3/ttyslot.3
@@ -23,7 +23,7 @@
 .\" This replaces an earlier man page written by Walter Harms
 .\" <walter.harms-jNDFPZUTrfTUvfpBxBsQfasoZZ7OtMbqG9Ur7JDdleE@public.gmane.org>.
 .\"
-.TH TTYSLOT 3 2010-09-20 "GNU" "Linux Programmer's Manual"
+.TH TTYSLOT 3 2011-09-15 "GNU" "Linux Programmer's Manual"
 .SH NAME
 ttyslot \- find the slot of the current user's terminal in some file
 .SH SYNOPSIS
@@ -118,6 +118,13 @@ On error (e.g., if none of the file descriptors 0, 1 or 2 is
 associated with a terminal that occurs in this data base)
 it returns 0 on UNIX V6 and V7 and BSD-like systems,
 but \-1 on System V-like systems.
+.SH ATTRIBUTES
+.SS Multithreading (see pthreads(7))
+The
+.BR ttyslot ()
+calls thread-unsafe function
+.BR getttyent (),
+so it is not thread-safe.
 .SH "CONFORMING TO"
 SUSv1; marked as LEGACY in SUSv2; removed in POSIX.1-2001.
 SUSv2 requires \-1 on error.
-- 
1.7.1

-- 
Best Regards,
Peng Haitao

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