From c1f295aa8666eb1c08a1edf944ac5617659a066c Mon Sep 17 00:00:00 2001
From: d <>
Date: Fri, 20 Nov 1998 11:18:51 +0000
Subject: Add thread-safety to libc, so that libc_r will build (on i386 at
 least). All POSIX libc api now there (to P1003.1c/D10)   (more md stuff is
 needed for other libc/arch/*)   (setlogin is no longer a special syscall) Add
 -pthread option to gcc (that makes it use -lc_r and -D_POSIX_THREADS). Doc
 some re-entrant routines Add libc_r to intro(3) dig() uses some libc srcs and
 an extra -I was needed there. Add more md stuff to libc_r. Update includes
 for the pthreads api Update libc_r TODO

---
 src/lib/libc/stdlib/rand.3 | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

(limited to 'src/lib/libc/stdlib/rand.3')

diff --git a/src/lib/libc/stdlib/rand.3 b/src/lib/libc/stdlib/rand.3
index 32d32761f1..28496ec12a 100644
--- a/src/lib/libc/stdlib/rand.3
+++ b/src/lib/libc/stdlib/rand.3
@@ -33,7 +33,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.\"	$OpenBSD: rand.3,v 1.4 1998/07/05 19:54:22 millert Exp $
+.\"	$OpenBSD: rand.3,v 1.5 1998/11/20 11:18:50 d Exp $
 .\"
 .Dd June 29, 1991
 .Dt RAND 3
@@ -48,6 +48,8 @@
 .Fn srand "unsigned seed"
 .Ft int
 .Fn rand void
+.Ft int
+.Fn rand_r "unsigned int *seed"
 .Sh DESCRIPTION
 .Bf -symbolic
 These interfaces are obsoleted by
@@ -73,6 +75,14 @@ with the same seed value.
 .Pp
 If no seed value is provided, the functions are automatically
 seeded with a value of 1.
+.Pp
+The
+.Fn rand_r
+is a thread-safe version of
+.Fn rand .
+Storage for the seed must be provided through the
+.Ar seed
+argument, and needs to have been initialized by the caller.
 .Sh SEE ALSO
 .Xr arc4random 3 ,
 .Xr rand48 3 ,
@@ -85,3 +95,10 @@ and
 functions
 conform to
 .St -ansiC .
+.Pp
+The
+.Fn rand_r
+function
+conforms to ISO/IEC 9945-1 ANSI/IEEE
+.Pq Dq Tn POSIX
+Std 1003.1c Draft 10.
-- 
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