6. Building a Patch
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## 6. Building a Patch

Every time a security advisory or security notice is announced, a patch update can be built.

For this example, 7.1-RELEASE will be used.

A couple of assumptions are made for a different release build:

- Setup the correct directory structure for the initial build.

- Perform an initial build for 7.1-RELEASE.

Create the patch directory of the respective release under `/usr/local/freebsd-update-server/patches/`.

`%` `mkdir -p /usr/local/freebsd-update-server/patches/7.1-RELEASE/` `%` `cd /usr/local/freebsd-update-server/patches/7.1-RELEASE`

As an example, take the patch for named(8). Read the advisory, and grab the necessary file from FreeBSD Security Advisories. More information on interpreting the advisory, can be found in the FreeBSD Handbook.

In the security brief, this advisory is called `SA-09:12.bind`. After downloading the file, it is required to rename the file to an appropriate patch level. It is suggested to keep this consistent with official FreeBSD patch levels, but its name may be freely chosen. For this build, let us follow the currently established practice of FreeBSD and call this `p7`. Rename the file:

`%` `cd /usr/local/freebsd-update-server/patches/7.1-RELEASE/; mv bind.patch 7-SA-09:12.bind`

### Note:

When running a patch level build, it is assumed that previous patches are in place. When a patch build is run, it will run all patches contained in the patch directory.

There can be custom patches added to any build. Use the number zero, or any other number.

### Warning:

It is up to the administrator of the FreeBSD Update Server to take appropriate measures to verify the authenticity of every patch.

At this point, a diff is ready to be built. The software checks first to see if a `scripts/init.sh` has been run on the respective release prior to running the diff build.

`#` `cd /usr/local/freebsd-update-server` `#` `sh scripts/diff.sh `amd64 7.1-RELEASE 7``

What follows is a sample of a differential build run.

`#` `sh -e scripts/diff.sh amd64 7.1-RELEASE 7` Wed Aug 26 10:09:59 PDT 2009 Extracting world+src for FreeBSD/amd64 7.1-RELEASE-p7 Wed Aug 26 17:10:25 UTC 2009 Building world for FreeBSD/amd64 7.1-RELEASE-p7 Wed Aug 26 18:05:11 UTC 2009 Distributing world for FreeBSD/amd64 7.1-RELEASE-p7 Wed Aug 26 18:06:16 UTC 2009 Building and distributing kernels for FreeBSD/amd64 7.1-RELEASE-p7 Wed Aug 26 18:17:50 UTC 2009 Constructing world components for FreeBSD/amd64 7.1-RELEASE-p7 Wed Aug 26 18:18:02 UTC 2009 Distributing source for FreeBSD/amd64 7.1-RELEASE-p7 Wed Aug 26 11:19:23 PDT 2009 Moving components into staging area for FreeBSD/amd64 7.1-RELEASE-p7 Wed Aug 26 11:19:37 PDT 2009 Extracting extra docs for FreeBSD/amd64 7.1-RELEASE-p7 Wed Aug 26 11:19:42 PDT 2009 Indexing world0 for FreeBSD/amd64 7.1-RELEASE-p7 Wed Aug 26 11:23:02 PDT 2009 Extracting world+src for FreeBSD/amd64 7.1-RELEASE-p7 Thu Sep 30 18:23:29 UTC 2010 Building world for FreeBSD/amd64 7.1-RELEASE-p7 Thu Sep 30 19:18:15 UTC 2010 Distributing world for FreeBSD/amd64 7.1-RELEASE-p7 Thu Sep 30 19:19:18 UTC 2010 Building and distributing kernels for FreeBSD/amd64 7.1-RELEASE-p7 Thu Sep 30 19:30:52 UTC 2010 Constructing world components for FreeBSD/amd64 7.1-RELEASE-p7 Thu Sep 30 19:31:03 UTC 2010 Distributing source for FreeBSD/amd64 7.1-RELEASE-p7 Thu Sep 30 12:32:25 PDT 2010 Moving components into staging area for FreeBSD/amd64 7.1-RELEASE-p7 Wed Aug 26 12:32:39 PDT 2009 Extracting extra docs for FreeBSD/amd64 7.1-RELEASE-p7 Wed Aug 26 12:32:43 PDT 2009 Indexing world1 for FreeBSD/amd64 7.1-RELEASE-p7 Wed Aug 26 12:35:54 PDT 2009 Locating build stamps for FreeBSD/amd64 7.1-RELEASE-p7 Wed Aug 26 12:36:58 PDT 2009 Reverting changes due to build stamps for FreeBSD/amd64 7.1-RELEASE-p7 Wed Aug 26 12:37:14 PDT 2009 Cleaning staging area for FreeBSD/amd64 7.1-RELEASE-p7 Wed Aug 26 12:37:14 PDT 2009 Preparing to copy files into staging area for FreeBSD/amd64 7.1-RELEASE-p7 Wed Aug 26 12:37:15 PDT 2009 Copying data files into staging area for FreeBSD/amd64 7.1-RELEASE-p7 Wed Aug 26 12:43:23 PDT 2009 Copying metadata files into staging area for FreeBSD/amd64 7.1-RELEASE-p7 Wed Aug 26 12:43:25 PDT 2009 Constructing metadata index and tag for FreeBSD/amd64 7.1-RELEASE-p7 ... Files found which include build stamps: kernel|generic|/GENERIC/hptrr.ko kernel|generic|/GENERIC/kernel world|base|/boot/loader world|base|/boot/pxeboot world|base|/etc/mail/freebsd.cf world|base|/etc/mail/freebsd.submit.cf world|base|/etc/mail/sendmail.cf world|base|/etc/mail/submit.cf world|base|/lib/libcrypto.so.5 world|base|/usr/bin/ntpq world|base|/usr/include/osreldate.h world|base|/usr/lib/libalias.a world|base|/usr/lib/libalias_cuseeme.a world|base|/usr/lib/libalias_dummy.a world|base|/usr/lib/libalias_ftp.a ... Values of build stamps, excluding library archive headers: v1.2 (Aug 26 2009 18:13:46) v1.2 (Aug 26 2009 18:11:44) @(#)FreeBSD 7.1-RELEASE-p7 #0: Wed Aug 26 18:11:50 UTC 2009 FreeBSD 7.1-RELEASE-p7 #0: Wed Aug 26 18:11:50 UTC 2009 root@server.myhost.com:/usr/obj/usr/src/sys/GENERIC 7.1-RELEASE-p7 Wed Aug 26 17:29:15 UTC 2009 Wed Aug 26 17:29:15 UTC 2009 ##### built by root@server.myhost.com on Wed Aug 26 17:49:58 UTC 2009 ##### built by root@server.myhost.com on Wed Aug 26 17:49:58 UTC 2009 ##### built by root@server.myhost.com on Wed Aug 26 17:49:58 UTC 2009 ##### built by root@server.myhost.com on Wed Aug 26 17:49:58 UTC 2009 Wed Aug 26 17:20:39 UTC 2009 ntpq 4.2.4p5-a Wed Aug 26 17:29:42 UTC 2009 (1) * Copyright (c) 1992-2009 The FreeBSD Project. Wed Aug 26 17:20:39 UTC 2009 Wed Aug 26 17:29:30 UTC 2009 Aug 26 2009 ntpd 4.2.4p5-a Wed Aug 26 17:29:41 UTC 2009 (1) ntpdate 4.2.4p5-a Wed Aug 26 17:29:42 UTC 2009 (1) ntpdc 4.2.4p5-a Wed Aug 26 17:29:42 UTC 2009 (1) Wed Aug 26 17:55:02 UTC 2009 Wed Aug 26 17:55:02 UTC 2009 Wed Aug 26 17:55:02 UTC 2009 Wed Aug 26 17:20:39 UTC 2009 ...

Updates are printed, and approval is requested.

New updates: kernel|generic|/GENERIC/kernel.symbols|f|0|0|0555|0|7c8dc176763f96ced0a57fc04e7c1b8d793f27e006dd13e0b499e1474ac47e10| kernel|generic|/GENERIC/kernel|f|0|0|0555|0|33197e8cf15bbbac263d17f39c153c9d489348c2c534f7ca1120a1183dec67b1| kernel|generic|/|d|0|0|0755|0|| src|base|/|d|0|0|0755|0|| src|bin|/|d|0|0|0755|0|| src|cddl|/|d|0|0|0755|0|| src|contrib|/contrib/bind9/bin/named/update.c|f|0|10000|0644|0|4d434abf0983df9bc47435670d307fa882ef4b348ed8ca90928d250f42ea0757| src|contrib|/contrib/bind9/lib/dns/openssldsa_link.c|f|0|10000|0644|0|c6805c39f3da2a06dd3f163f26c314a4692d4cd9a2d929c0acc88d736324f550| src|contrib|/contrib/bind9/lib/dns/opensslrsa_link.c|f|0|10000|0644|0|fa0f7417ee9da42cc8d0fd96ad24e7a34125e05b5ae075bd6e3238f1c022a712| ... FreeBSD/amd64 7.1-RELEASE update build complete. Please review the list of build stamps printed above and the list of updated files to confirm that they look sensible, then run # sh -e approve.sh amd64 7.1-RELEASE to sign the build.

Follow the same process as noted before for approving a build:

`#` `sh -e scripts/approve.sh amd64 7.1-RELEASE` Wed Aug 26 12:50:06 PDT 2009 Signing build for FreeBSD/amd64 7.1-RELEASE Wed Aug 26 12:50:06 PDT 2009 Copying files to patch source directories for FreeBSD/amd64 7.1-RELEASE Wed Aug 26 12:50:06 PDT 2009 Copying files to upload staging area for FreeBSD/amd64 7.1-RELEASE Wed Aug 26 12:50:07 PDT 2009 Updating databases for FreeBSD/amd64 7.1-RELEASE Wed Aug 26 12:50:07 PDT 2009 Cleaning staging area for FreeBSD/amd64 7.1-RELEASE The FreeBSD/amd64 7.1-RELEASE update build has been signed and is ready to be uploaded. Remember to run # sh -e umountkey.sh to unmount the decrypted key once you have finished signing all the new builds.

After approving the build, upload the software:

`#` `cd /usr/local/freebsd-update-server` `#` `sh scripts/upload.sh `amd64 7.1-RELEASE``

For reference, the entire run of `diff.sh` is attached.

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