SYSMERGE(8) OpenBSD System Manager's Manual SYSMERGE(8)NAMEsysmerge - update system configuration files
SYNOPSISsysmerge [-bd] [-s [src | etcXX.tgz]] [-x xetcXX.tgz]
DESCRIPTIONsysmerge is a ksh(1) script designed to help the administrator update
configuration files after upgrading to a new release or snapshot. The
configuration files are typically those held in /etc, though sysmerge is
also able to update files held in /dev, /root, and /var.
It is HIGHLY recommended to back up the /etc directory before running
this script.
sysmerge works by comparing a temporary reference root directory against
currently installed files. The reference files are created from a cvs(1)
source tree or a ``.tgz'' release or snapshot file. The default, if no
source is specified on the command line, is to use /usr/src. All work is
done under ${TMPDIR}/sysmerge.XXXXX (known as the work directory). The
temporary root directory temproot is created under the work directory.
Each modified and/or replaced file is saved under the backup directory
inside the work directory.
To make sure configuration files are in sync with the actual binaries,
use the same source as was used to upgrade the system: /usr/src when
upgrading from source; etcXX.tgz and xetcXX.tgz when upgrading from
binary sets.
sysmerge will work through the fileset, offering the chance to merge any
differences using ${MERGE_CMD}. Merged files may be edited using a
default editor, or one defined by the ${VISUAL} or ${EDITOR} environment
variables. Files may also be left to deal with at a later date. Should
any problems occur, such as a failure to upgrade a file, the user will be
notified and have to deal with the issue by hand.
By default (if -d is not used) sysmerge only compares files whose
reference sources have changed since the last run and attempts to
automatically upgrade them to the newest version, provided that they have
no local changes. It automatically installs missing files and binaries,
and updates files differing only by CVS Id. Files whose reference
sources have matching CVS Id are skipped from comparison. /etc/fbtab,
/etc/login.conf, /etc/sysctl.conf, and /etc/ttys are created using helper
scripts and are always compared. Users and groups that are missing from
the current installation but present in the new master.passwd(5) and
group(5) files will be automatically created.
sysmerge will finish by running mtree(8) to make sure the directory
structure has correct permissions.
The options are as follows:
-b Batch mode. sysmerge runs non-interactively, saving differing
files for later manual processing.
-d Diff mode. In this mode, sysmerge will not take any automatic
action, allowing for a full diff comparison.
-s [src | etcXX.tgz]
Specify a path to an OpenBSD top src directory or an etcXX.tgz
tarball. A tarball path specified as an FTP or HTTP URL will be
passed to ${FETCH_CMD}.
-x xetcXX.tgz
Specify a path to an xetcXX.tgz tarball. A tarball path
specified as an FTP or HTTP URL will be passed to ${FETCH_CMD}.
Files and directories can be excluded from comparison by listing them in
the file /etc/sysmerge.ignore, each entry separated by white space or a
new line. The following files will always be skipped from comparison:
/etc/*.db, /etc/mail/*.db, /etc/passwd, /etc/motd, /etc/myname,
/var/db/locate.database, /var/db/sysmerge/etcsum,
/var/db/sysmerge/xetcsum, /var/games/tetris.scores, /var/mail/root.
The sendmail(8) configuration files /etc/mail/localhost.cf,
/etc/mail/sendmail.cf and /etc/mail/submit.cf will always differ because
they include their build date and directories. A special test was added
to handle this and they are offered for comparison only if they really
differ.
ENVIRONMENT
DBDIR Directory in which checksum files are stored. If unset, this
defaults to /var/db/sysmerge.
DESTDIR Directory in which to merge and install files. If unset,
this defaults to /.
EDITOR, VISUAL
Specifies an editor to use. If both EDITOR and VISUAL are
set, VISUAL takes precedence. If neither EDITOR nor VISUAL
are set, the default is vi(1).
FETCH_CMD Command used to fetch remote files. Defaults to ftp(1).
FTP_KEEPALIVE
Have ftp(1) send a byte after every FTP_KEEPALIVE seconds, so
that incorrectly configured network equipment won't
aggressively drop it. See ``ftp -k'' for more information.
MERGE_CMD Command used to merge diffs. This will be called with three
arguments: the first argument is the output file to create,
the second argument is the currently installed file and the
third argument is the reference file. If unset, this
defaults to ``sdiff -as -w ${SWIDTH} -o''.
PAGER Specifies the pagination program to use.
REPORT Log summary which may contain information for further,
manual, updating. Defaults to ${WRKDIR}/sysmerge.log.
TMPDIR Directory in which the work directory is created. If unset,
this defaults to /var/tmp.
FILES
${TMPDIR}/sysmerge.XXXXX Default work directory. The temproot and
backup directories are created relative to
this.
${WRKDIR}/sysmerge.log Default log file.
/etc/sysmerge.ignore Files and directories to ignore from
comparison.
SEE ALSOcap_mkdb(1), chpass(1), diff(1), mktemp(1), more(1), sdiff(1),
groupadd(8), MAKEDEV(8), makemap(8), mtree(8), newaliases(8), pwd_mkdb(8)
/usr/src/etc/Makefile
http://www.openbsd.org/faq/current.html
http://www.openbsd.org/faq/upgradeXX.html
HISTORY
The sysmerge script first appeared in OpenBSD 4.4.
AUTHORS
The sysmerge shell script was written by Antoine Jacoutot
<ajacoutot@openbsd.org> using FreeBSD mergemaster written by Douglas
Barton <DougB@FreeBSD.org> as a base.
OpenBSD 4.9 November 11, 2010 OpenBSD 4.9
