680 lines
27 KiB
Plaintext
680 lines
27 KiB
Plaintext
<articleinfo>
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<title>&os;/&arch; &release.current; Release Notes</title>
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<corpauthor>The FreeBSD Project</corpauthor>
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<pubdate>$FreeBSD$</pubdate>
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<copyright>
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<year>2000</year>
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<year>2001</year>
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<year>2002</year>
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<year>2003</year>
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<holder role="mailto:doc@FreeBSD.org">The FreeBSD Documentation Project</holder>
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</copyright>
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<abstract>
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<para>The release notes for &os; &release.current; contain a summary
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of
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<![ %include.historic; [
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the changes made to the &os; base system since &release.prev;.
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]]>
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<![ %no.include.historic; [
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recent changes made to the &os; base system on the &release.branch;
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development branch.
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]]>
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Both changes for kernel and userland are listed, as well as
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applicable security advisories that were issued since the last
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release. Some brief remarks on upgrading are also presented.</para>
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</abstract>
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</articleinfo>
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<sect1 id="intro">
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<title>Introduction</title>
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<para>This document contains the release notes for &os;
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&release.current; on the &arch.print; hardware platform. It
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describes recently added, changed, or deleted features of &os;.
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It also provides some notes on upgrading
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from previous versions of &os;.</para>
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<![ %release.type.snapshot [
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<para>The &release.type; distribution to which these release notes
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apply represents a point along the &release.branch; development
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branch between &release.prev; and the future &release.next;. Some
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pre-built, binary &release.type; distributions along this branch
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can be found at <ulink url="&release.url;"></ulink>.</para>
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]]>
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<![ %release.type.release [
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<para>This distribution of &os; &release.current; is a
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&release.type; distribution. It can be found at <ulink
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url="&release.url;"></ulink> or any of its mirrors. More
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information on obtaining this (or other) &release.type;
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distributions of &os; can be found in the <ulink
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url="http://www.FreeBSD.org/doc/en_US.ISO8859-1/books/handbook/mirrors.html"><quote>Obtaining
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FreeBSD</quote> appendix</ulink> to the <ulink
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url="http://www.FreeBSD.org/doc/en_US.ISO8859-1/books/handbook/">FreeBSD
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Handbook</ulink>.</para>
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]]>
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</sect1>
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<sect1 id="new">
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<title>What's New</title>
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<para>This section describes
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<![ %include.historic; [
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the most user-visible new or changed features in &os;
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since &release.prev;.
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In general, changes described here are unique to the &release.branch;
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branch unless specifically marked as &merged; features.
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]]>
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<![ %no.include.historic; [
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many of the user-visible new or changed features in &os;
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since &release.prev;. It includes items that are unique to the
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&release.branch; branch, as well as some features that may have been
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recently merged to
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other branches (after &os; &release.prev.historic;). The later
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items are marked as &merged;.
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]]>
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</para>
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<para>Typical release note items
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document new drivers or hardware support, new commands or options,
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major bugfixes, or contributed software upgrades. Applicable security
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advisories issued after &release.prev.historic; are also listed.</para>
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<para>Many additional changes were made to &os; that are not listed
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here for lack of space. For example, documentation was corrected
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and improved, minor bugs were fixed, insecure coding practices
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were audited and corrected, and source code was cleaned up.</para>
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<sect2 id="security">
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<title>Security Advisories</title>
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<para>A remotely exploitable vulnerability in
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<application>CVS</application> has been corrected with the
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import of version 1.11.5. More details can be found in security
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advisory <ulink
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url="ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-03:01.cvs.asc">FreeBSD-SA-03:01</ulink>.
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&merged;</para>
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<para>A timing-based attack on <application>OpenSSL</application>,
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which could allow a very powerful attacker access to plaintext
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under certain circumstances, has been prevented via an upgrade
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to <application>OpenSSL</application> 0.9.7. See security
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advisory <ulink
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url="ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-03:02.openssl.asc">FreeBSD-SA-03:02</ulink>
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for more details. &merged;</para>
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<para>The security and performance of the
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<quote>syncookies</quote> feature has been improved to decrease
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the chance of an attacker being able to spoof connections.
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More details are given in security advisory <ulink
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url="ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-03:03.syncookies.asc">FreeBSD-SA-03:03</ulink>. &merged;</para>
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<para>A remotely-exploitable buffer overflow vulnerability in
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<application>sendmail</application> has been fixed by updating
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<application>sendmail</application> to version 8.12.8. For more
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details, see security advisory <ulink
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url="ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-03:04.sendmail.asc">FreeBSD-SA-03:04</ulink>.
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&merged;</para>
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<para>A bounds-checking bug in the XDR implementation, which could
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allow a remote attacker to cause a denial-of-service, has been
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fixed. For more details see security advisory <ulink
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url="ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-03:05.xdr.asc">FreeBSD-SA-03:05</ulink>.
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&merged;</para>
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<para>Two recently-publicized flaws in
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<application>OpenSSL</application> have been corrected. For
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more details, see security advisory <ulink
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url="ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-03:06.openssl.asc">FreeBSD-SA-03:06</ulink>.
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&merged;</para>
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</sect2>
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<sect2 id="kernel">
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<title>Kernel Changes</title>
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<para arch="pc98">Support for the CanBe power management
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controller has been added. &merged;</para>
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<para>&man.devfs.5; is now mandatory; the
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<literal>NODEVFS</literal> option has been removed from the set of
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possible kernel configuration options.</para>
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<para arch="i386,pc98">The DRM kernel modules have been updated to
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a snapshot from the DRI CVS repository, roughly equivalent to
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XFree86 4.3.0 but also including some additional
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bugfixes.</para>
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<para>A minor bug in the permissions handling of
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<filename>/dev/tty</filename> has been fixed. As a result,
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&man.ssh.1; can now be used after &man.su.1;.</para>
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<para>A bug that caused &man.fstat.2; to return
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<literal>0</literal> as the number of bytes available to read
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from a TCP socket has been fixed.</para>
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<para>A bug that caused &man.kqueue.2; to report
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<literal>0</literal> as the number of bytes available to read
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from a TCP socket has been fixed. The
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<literal>NOTE_LOWAT</literal> flag for
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<literal>EVFILT_READ</literal> has been fixed.</para>
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<para>Linux emulation mode now supports IPv6.</para>
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<!-- Above this line, sort kernel changes by manpage/keyword-->
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<para>A second process scheduler, designed to be a general purpose
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scheduler with many SMP benefits, has been added to the scheduler
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framework. Exactly one scheduler must be specified in a kernel
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configuration. The original scheduler may be selected using
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<literal>options SCHED_4BSD</literal>. The newer
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(experimental) scheduler can be selected by using
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<literal>options SCHED_ULE</literal>.</para>
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<para>Device major numbers are now allocated dynamically by
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default. This change greatly decreases the need for a static,
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centralized table of major number assignments to device drivers
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(a few drivers retain their old static major numbers for
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compatability), and also reduces the possibility of running out
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of device major numbers.</para>
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<sect3>
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<title>Processor/Motherboard Support</title>
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<para arch="i386">&os; now has rudimentary support for
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HyperThreading (HTT). SMP kernels with the
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<literal>HTT</literal> kernel option will detect and start up
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the logical processors on HTT-capable machines. The logical
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processors will be treated like additional physical processors
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for the purposes of process scheduling. &merged;</para>
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</sect3>
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<sect3>
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<title>Bootloader Changes</title>
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<para arch="alpha">The alpha boot loader
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(<filename>boot1</filename>) can now be called
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<filename>boot</filename> for consistency with other
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platforms.</para>
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<para arch="i386,pc98">The two parts of the boot loader
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(<filename>boot1</filename> and <filename>boot2</filename>)
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have been combined into a single <filename>boot</filename>
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file, to simplify programs that need to write or otherwise
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manipulate the boot loader.</para>
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<para arch="pc98">The PC98 bootloader now has support for
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booting from SCSI MO media. &merged;</para>
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<para>The <filename>/modules</filename> directory (once the
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default location for modules on &os; 4.X) is no longer a
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part of the default <varname>kern.module_path</varname>.
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Third-party modules should be placed in
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<filename>/boot/modules</filename>.
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<note>
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<para>Modules designed for use with &os; 4.X are likely to
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panic and should be used with extreme caution.</para>
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</note>
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</para>
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<!-- Above this line, order bootloader changes by keyword-->
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</sect3>
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<sect3>
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<title>Network Interface Support</title>
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<para>The cm driver now supports IPX. &merged;</para>
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<para>A new wlan module provides 802.11 link-layer support. The
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&man.wi.4; driver now uses this facility.</para>
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<para arch="i386,alpha,pc98,sparc64">A timing bug in the
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&man.xl.4; driver, which could cause a kernel panic (or other
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problems) when configuring an interface, has been
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fixed.</para>
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</sect3>
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<sect3>
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<title>Network Protocols</title>
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<para>&man.ipfw.4; <literal>skipto</literal> rules can once
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again be used with the <literal>log</literal> keyword.
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&man.ipfw.4; <literal>uid</literal> rules are once again
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working.</para>
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<para>It is now possible to build the
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<literal>FAST_IPSEC</literal> and <literal>INET6</literal>
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options into the same kernel. (They still cannot be used
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together, however.)</para>
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<para>A bug in TCP NewReno, which caused premature exit from
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fast recovery when NewReno was enabled, has been
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fixed. &merged;</para>
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<para>TCP now has support for the <quote>Limited
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Transmit</quote> mechanism proposed by RFC 3042. This feature
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is intended to improve the effectiveness of TCP loss recovery
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in certain circumstances. It is off by default but can be
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enabled with the <varname>net.inet.tcp.rfc3042</varname>
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sysctl variable. More information can be found in
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&man.tcp.4;.</para>
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<para>TCP now has support for increased initial congestion
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window sizes as described in RFC 3390. This feature can
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improve the throughput of short transfers, as well as
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high-bandwidth, large propagation-delay connections. It is
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off by default but can be enabled with the
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<varname>net.inet.tcp.rfc3390</varname> sysctl variable. More
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information can be found in &man.tcp.4;.</para>
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<para>The IP fragment reassembly code behaves more gracefully
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when receiving a large number of packet fragments (it is
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designed to be more resistant to fragment-based denial of
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service attacks). &merged;</para>
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<para>TCP connections in the <literal>TIME_WAIT</literal> state
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now use a special protocol control block that uses less space
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than a full-blown TCP PCB. This allows some of the data
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structures and resources used by such a connection to be freed
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earlier.</para>
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<para>It is now possible to specify the range of
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<quote>privileged ports</quote> (TCP and UDP ports that
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require superuser access to &man.bind.2; to). The range is
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now specified with the
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<varname>net.inet.ip.portrange.reservedlow</varname> and
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<varname>net.inet.ip.portrange.reservedhigh</varname> sysctl
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variables, defaulting to the traditional UNIX behavior. This
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feature is intended to help network servers bind
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to traditionally privileged ports without requiring superuser
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access. &man.ip.4; has more details.</para>
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<para>Some bugs in the non-blocking RPC code has been fixed. As
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a result, &man.amd.8; users are now able to mount volumes from
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a &release.current; server.</para>
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<para>Support for XNS networking, which has not worked
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correctly for almost seven years, has been removed.</para>
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</sect3>
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<sect3>
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<title>Disks and Storage</title>
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<para>The &man.aac.4; driver now runs free of the Giant kernel
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lock. This change has given a nearly 20% performance speedup
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on an SMP system running multiple I/O intensive loads.</para>
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<para>The &man.ata.4; driver now supports all known SiS
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chipsets. (More details can be found in the Hardware
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Notes.)</para>
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<para>A number of changes have been made to the &man.cd.4;
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driver. The primary user-visible change is improved
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compatability with ATAPI/USB/Firewire CDROM drives.</para>
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<para>&man.geom.4; is now mandatory; the
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<literal>NO_GEOM</literal> has been removed from the set of
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kernel configuration options.</para>
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<para>A bug in the &man.mly.4; driver that caused hangs has been
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corrected.</para>
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<para>Support has been added for volume labels on UFS and UFS2
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filesystems. These labels are strings that can be used to
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identify a volume, regardless of what device it appears on.
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Labels can be set with the <option>-L</option> options to
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&man.newfs.8; or &man.tunefs.8;. With the
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<literal>GEOM_VOL</literal> module, volumes can be accessed
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using their labels under <filename>/dev/vol</filename>.</para>
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<para>The root filesystem can now be located on a &man.vinum.4;
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volume. More information can be found in the &man.vinum.4;
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manual page.</para>
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<para arch="pc98">The wfd and wst drivers, which have been
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broken for some time, have been removed.</para>
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</sect3>
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<sect3>
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<title>Filesystems</title>
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<para>NETNCP and Netware Filesystem Support (nwfs) are once
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again working.</para>
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<para>Bugs that could cause the unmounting of a smbfs share to
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fail or cause a kernel panic have been fixed.</para>
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</sect3>
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<sect3>
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<title>PCCARD Support</title>
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<para></para>
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</sect3>
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<sect3>
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<title>Multimedia Support</title>
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<para></para>
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</sect3>
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<sect3>
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<title>Contributed Software</title>
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<para><application>IPFilter</application> has been updated to
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3.4.31. &merged;</para>
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</sect3>
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</sect2>
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<sect2 id="userland">
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<title>Userland Changes</title>
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<para>&man.adduser.8; now correctly handles setting user passwords
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containing special shell characters.</para>
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<para arch="alpha,i386">The <filename>compat4x</filename>
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distribution now includes the
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<filename>libcrypto.so.2</filename>,
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<filename>libgmp.so.3</filename>, and
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<filename>libssl.so.2</filename> libraries from &os;
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4.7-RELEASE.</para>
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<para>&man.config.8; now implements a <literal>nodevice</literal>
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kernel configuration file directive that cancels the effect of a
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<literal>device</literal> directive. The new
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<literal>nooption</literal> and <literal>nomakeoption</literal>
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directives cancel prior <literal>option</literal> and
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<literal>makeoption</literal> directives, respectively.</para>
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<para>The <option>-N</option> and <option>-W</option> flags to
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&man.disklabel.8; have been retired.</para>
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<para>&man.disklabel.8; is now only built for architectures where
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it is useful (i386, pc98, alpha, and ia64).</para>
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<para>The <option>-s</option> to &man.disklabel.8; has been
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removed because the i386 boot loader now resides in a single
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file.</para>
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<para>&man.dump.8; now supports caching of disk blocks with the
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<option>-C</option> option. This can improve dump performance
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at the cost of possibly missing filesystem updates that occur
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between passes.</para>
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<para>&man.dumpfs.8; now supports a <option>-m</option> flag to
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print file system parameters in the form of a &man.newfs.8;
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command.</para>
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<para>&man.elfdump.1;, a utility to display information about &man.elf.5;
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format executable files, has been added.</para>
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<para>&man.fetch.1; uses the <filename>.netrc</filename> support
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in &man.fetch.3; and also supports a <option>-N</option> to
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specify an alternate <filename>.netrc</filename> file.</para>
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<para>&man.fetch.3; now has support for
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<filename>.netrc</filename> files (see &man.ftp.1; for more
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details).</para>
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<para>&man.ftpd.8; now supports a <option>-h</option> option to
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disable printing any host-specific information, such as the
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&man.ftpd.8; version or hostname, in server messages.
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&merged;</para>
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<para>&man.ftpd.8; now supports a <option>-P</option> option to
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specify a port on which to listen in daemon mode. The default
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data port number is now set to be one less than the control port
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number, rather than being hard-coded. &merged;</para>
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<para>&man.ftpd.8; now supports an extended format of the
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<filename>/etc/ftpchroot</filename> file. Please refer
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to the &man.ftpchroot.5; manpage, which is now available,
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for details. &merged;</para>
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<para>&man.ftpd.8; now supports login directory pathnames
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that specify simultaneously a directory for &man.chroot.2;
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and that to change to in the chrooted environment. The
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<literal>/./</literal> separator is used for
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this purpose, like in other FTP daemons having this feature.
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It may be used in both &man.ftpchroot.5; and &man.passwd.5;.
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&merged;</para>
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<para>&man.fwcontrol.8; now supports <option>-R</option> and
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<option>-S</option> options for receiving and sending DV
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streams. &merged;</para>
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<para>&man.ipfw.8; now supports <literal>enable</literal> and
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<literal>disable</literal> commands to control various aspects
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of the operation of &man.ipfw.4; (including enabling and
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disabling the firewall itself). These provide a more convenient
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and visible interface than the existing sysctl
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variables. &merged;</para>
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<para>&man.kenv.1; has been moved from
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<filename>/usr/bin</filename> to <filename>/bin</filename> to
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make it available at times during system startup when only the
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root filesystem is mounted.</para>
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|
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<para>The MAKEDEV script is now unnecessary, due to the mandatory
|
|
presence of &man.devfs.5;, and has been removed.</para>
|
|
|
|
<para>The &man.libgeom.3; library has been added to allow some
|
|
userland access to the &man.geom.4; subsystem.</para>
|
|
|
|
<para>The mac_portacl MAC policy module has been added. It
|
|
provides a simple ACL mechanism to permit users and groups to
|
|
bind ports for TCP or UDP, and is intended to be used in
|
|
conjunction with the recently-added
|
|
<varname>net.inet.ip.portrange.reservedhigh</varname> sysctl.
|
|
|
|
<para>The &man.mksnap.ffs.8; program has been added to allow
|
|
easier creation of FFS snapshots. It is a
|
|
SUID-<username>root</username> executable designed for use by
|
|
members of the <groupname>operator</groupname>group.</para>
|
|
|
|
<para>&man.mount.nfs.8; now supports a <option>-c</option> flag to
|
|
avoid doing a &man.connect.2; for UDP mount points. This option
|
|
must be used if the server does not reply to requests from the
|
|
standard NFS port number 2049 or if it replies to requests using
|
|
a different IP address (which can occur if the server is
|
|
multi-homed). Setting the
|
|
<varname>vfs.nfs.nfs_ip_paranoia</varname> sysctl to
|
|
<literal>0</literal> will make this option the
|
|
default. &merged;</para>
|
|
|
|
<para>&man.newsyslog.8; now supports a <literal>W</literal> flag
|
|
to force previously-started compression jobs for an entry (or
|
|
group of entries specified with the <literal>G</literal> flag)
|
|
to finish before beginning a new one. This feature is designed
|
|
to prevent system overloads caused by starting several
|
|
compression jobs on big files simultaneously. &merged;</para>
|
|
|
|
<para>&man.pam.ssh.8; has been rewritten. One side effect of the
|
|
rewrite is that it now starts a separate instance of
|
|
&man.ssh-agent.1; for each session instead of trying to connect
|
|
each session to the agent started by the first session.</para>
|
|
|
|
<para>&man.ping.8; now supports a <option>-D</option> flag to set
|
|
the <quote>Don't Fragment</quote> bit on outgoing packets.</para>
|
|
|
|
<para>&man.ping.8; now supports a <option>-M</option> option to use
|
|
ICMP mask request or timestamp request messages instead of ICMP echo requests.</para>
|
|
|
|
<para>&man.ping.8; now supports a <option>-z</option> flag to set
|
|
the Type of Service bits in outgoing packets.</para>
|
|
|
|
<para>&man.pw.8; can now add a user whose name ends with a
|
|
<literal>$</literal> character; this change is intended to help
|
|
administration of <application>Samba</application>
|
|
services. &merged;</para>
|
|
|
|
<para>A bug in &man.rand.3; that could cause a sequence to remain
|
|
stuck at <literal>0</literal> has been fixed. (&man.rand.3;
|
|
remains unsuitable for all but trivial uses.)</para>
|
|
|
|
<para>&man.sem.open.3; now correctly handles multiple opens of the
|
|
same semaphore; as a result, &man.sem.close.3; no longer crashes
|
|
calling programs.</para>
|
|
|
|
<para>The seeding algorithm used by &man.srandom.3; has been
|
|
strengthened.</para>
|
|
|
|
<para arch="sparc64">The sunlabel utility, a program analogous to
|
|
&man.disklabel.8; that works on Sun disk labels, has been
|
|
added.</para>
|
|
|
|
<para>The &man.swapoff.8; command has been added to disable paging
|
|
and swapping on a device. A related &man.swapctl.8; command has
|
|
been added to provide an interface to &man.swapon.8; and
|
|
&man.swapoff.8; similar to other BSDs.
|
|
|
|
<note>
|
|
<para>The &man.swapoff.8; feature should be considered
|
|
experimental.</para>
|
|
</note>
|
|
</para>
|
|
|
|
<para>&man.syslogd.8; now allows multiple hosts or programs to be
|
|
named in host or program specifications in &man.syslog.conf.5;
|
|
files.</para>
|
|
|
|
<para>&man.systat.1; now includes an <option>-ifstat</option>
|
|
display mode that displays the network traffic going through
|
|
active intrfaces on the system.</para>
|
|
|
|
<para>&man.xargs.1; now supports a <option>-P</option> option to
|
|
execute multiple copies of the same utility in parallel.</para>
|
|
|
|
<sect3>
|
|
<title>Contributed Software</title>
|
|
|
|
<para><application>awk</application> from Bell Labs has been
|
|
updated to a 14 March 2003 snapshot.</para>
|
|
|
|
<para><application>BIND</application> has been updated to
|
|
version 8.3.4. &merged;</para>
|
|
|
|
<para>All of the <application>bzip2</application> suite of
|
|
applications is now installed in the base system (in
|
|
particular, <command>bzip2recover</command> is now built and
|
|
installed). &merged;</para>
|
|
|
|
<para><application>CVS</application> has been updated to
|
|
1.11.5. &merged;</para>
|
|
|
|
<para><application>FILE</application> has been updated to
|
|
3.41. &merged;</para>
|
|
|
|
<para><application>GCC</application> has been updated to
|
|
3.2.2 (release version).</para>
|
|
|
|
<para>The <application>ISC DHCP</application> client has been
|
|
updated to 3.0.1RC11. &merged;</para>
|
|
|
|
<para><application>Kerberos IV</application> support (in the
|
|
form of <application>KTH eBones</application>) has been
|
|
removed. Users requiring this functionality can still get it
|
|
from the <filename role="port">security/krb4</filename> port
|
|
(or package). Kerberos IV compatability mode for Kerberos 5
|
|
has been removed, and the
|
|
<literal>k5<replaceable>program</replaceable></literal>
|
|
userland utilities have been renamed to
|
|
<literal>k<replaceable>program</replaceable></literal>.</para>
|
|
|
|
<para><application>libpcap</application> now has support for
|
|
selecting among multiple data link types on an
|
|
interface.</para>
|
|
|
|
<para><application>OpenPAM</application> has been updated to the
|
|
<quote>Daffodil</quote> release.</para>
|
|
|
|
<para><application>OpenSSL</application> has been updated to
|
|
release 0.9.7a. Among other features, this release includes
|
|
support for AES and takes advantage of &man.crypto.4;
|
|
devices. &merged;</para>
|
|
|
|
<para><application>sendmail</application> has been updated to
|
|
version 8.12.8. &merged;</para>
|
|
|
|
<para>&man.tcpdump.1; has been updated to version 3.7.2. &merged;
|
|
It also now supports a <option>-L</option> flag to
|
|
list the data link types available on an interface and a
|
|
<option>-y</option> option to specify the data link type to use while
|
|
capturing packets.</para>
|
|
|
|
</sect3>
|
|
|
|
<sect3>
|
|
<title>Ports/Packages Collection Infrastructure</title>
|
|
|
|
<para>The one-line <filename>pkg-comment</filename> files have
|
|
been eliminated from each port skeleton; their contents have
|
|
been moved into each port's <filename>Makefile</filename>.
|
|
This change reduces the disk space and inodes used by the
|
|
ports tree. &merged;</para>
|
|
|
|
</sect3>
|
|
</sect2>
|
|
|
|
<sect2>
|
|
<title>Release Engineering and Integration</title>
|
|
|
|
<para>The supported release of <application>GNOME</application>
|
|
has been updated to 2.2. &merged;</para>
|
|
|
|
<para>The supported release of <application>KDE</application>
|
|
has been updated to 3.1. &merged;</para>
|
|
|
|
<para>&man.sysinstall.8; once again supports installing individual
|
|
components of <application>XFree86</application>. Supporting
|
|
changes (not user-visible) generalize the concept of installing
|
|
parts of distributions as packages.</para>
|
|
|
|
<para>The supported release of <application>XFree86</application>
|
|
has been updated to 4.3.0. &merged;</para>
|
|
|
|
</sect2>
|
|
|
|
<sect2>
|
|
<title>Documentation</title>
|
|
|
|
<para></para>
|
|
</sect2>
|
|
|
|
</sect1>
|
|
|
|
<sect1 id="upgrade">
|
|
<title>Upgrading from previous releases of &os;</title>
|
|
|
|
<para>Users with existing &os; systems are
|
|
<emphasis>highly</emphasis> encouraged to read the <quote>Early
|
|
Adopter's Guide to &os; 5.0</quote>. This document generally has
|
|
the filename <filename>EARLY.TXT</filename> on the distribution
|
|
media, or any other place that the release notes can be found. It
|
|
offers some notes on upgrading, but more importantly, also
|
|
discusses some of the relative merits of upgrading to &os;
|
|
5.<replaceable>X</replaceable> versus running &os;
|
|
4.<replaceable>X</replaceable>.</para>
|
|
|
|
<important>
|
|
<para>Upgrading &os; should, of course, only be attempted after
|
|
backing up <emphasis>all</emphasis> data and configuration
|
|
files.</para>
|
|
</important>
|
|
</sect1>
|