Date: Fri, 24 May 2002 15:41:32 -0700 (PDT) From: Andreas Gustafsson <gson@nominum.com> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/38527: /dev/random does not obey O_NONBLOCK flag Message-ID: <200205242241.g4OMfWVD095116@www.freebsd.org>
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>Number: 38527 >Category: kern >Synopsis: /dev/random does not obey O_NONBLOCK flag >Confidential: no >Severity: serious >Priority: medium >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Fri May 24 15:50:01 PDT 2002 >Closed-Date: >Last-Modified: >Originator: Andreas Gustafsson >Release: 4.5-STABLE >Organization: Nominum, Inc >Environment: FreeBSD yomiko.engr.nominum.com 4.5-STABLE FreeBSD 4.5-STABLE #0: Wed May 1 17:12:00 PDT 2002 root@yomiko.engr.nominum.com:/usr/obj/usr/src/sys/YOMIKO i386 >Description: In FreeBSD 4.5, reads on /dev/random are nonblocking by default. This is incompatible with both the NetBSD and the Linux /dev/random. Reads should be nonblocking if and only if the O_NONBLOCK flag was passed to open(). >How-To-Repeat: Type "od -c </dev/random" and note that the od process exits after printing a few bytes of random data. Repeat on a NetBSD or Linux system and note that od blocks until more entropy has been gathered (e.g., after vigorous movement of the mouse). >Fix: >Release-Note: >Audit-Trail: >Unformatted: To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-bugs" in the body of the message
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