diff options
Diffstat (limited to 'lib/libc/stdlib/rand.3')
| -rw-r--r-- | lib/libc/stdlib/rand.3 | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/lib/libc/stdlib/rand.3 b/lib/libc/stdlib/rand.3 index 32d32761f19..28496ec12aa 100644 --- a/lib/libc/stdlib/rand.3 +++ b/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. |