.\" $OpenBSD: sysmerge.8,v 1.40 2013/09/10 08:44:38 ajacoutot Exp $ .\" .\" Copyright (c) 2008 Antoine Jacoutot .\" .\" Permission to use, copy, modify, and distribute this software for any .\" purpose with or without fee is hereby granted, provided that the above .\" copyright notice and this permission notice appear in all copies. .\" .\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES .\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF .\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR .\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES .\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. .\" .Dd $Mdocdate: September 10 2013 $ .Dt SYSMERGE 8 .Os .Sh NAME .Nm sysmerge .Nd update system configuration files .Sh SYNOPSIS .Nm .Bk -words .Op Fl bd .Op Fl s Op Ar src \*(Ba etcXX.tgz .Op Fl x Ar xetcXX.tgz .Ek .Sh DESCRIPTION .Nm is a .Xr 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 .Pa /etc , though .Nm is also able to update files held in .Pa /dev , .Pa /root , and .Pa /var . .Pp .Nm works by comparing a temporary reference root directory against currently installed files. The reference files are created from a .Xr cvs 1 source tree or a .Dq .tgz release or snapshot file. All work is done under .Pa ${TMPDIR}/sysmerge.XXXXXXXXXX (known as the .Em work directory ) . The temporary root directory .Pa temproot is created under the work directory. Each modified and/or replaced file is saved under the .Pa backup directory inside the work directory. .Pp If no source is specified on the command line, .Nm uses ${FETCH_CMD} to fetch the required sets from the URI pointed to by the .Ev SM_PATH environment variable, and falls back to .Pa /usr/src if this variable is unset. .Pp To make sure configuration files are in sync with the actual binaries, use the same source as was used to upgrade the system: .Pa /usr/src when upgrading from source; .Pa etcXX.tgz and .Pa xetcXX.tgz when upgrading from binary sets. .Pp .Nm 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. .Pp By default (if .Fl d is not used) .Nm 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. .Pa /etc/fbtab , .Pa /etc/login.conf , .Pa /etc/sysctl.conf , and .Pa /etc/ttys are created using helper scripts and are .Sy always compared. Users and groups that are missing from the current installation but present in the new .Xr master.passwd 5 and .Xr group 5 files will .Sy always be automatically (re)created. .Pp .Nm will finish by running .Xr mtree 8 to make sure the directory structure has correct permissions. .Pp The options are as follows: .Bl -tag -width Ds .It Fl b Batch mode. .Nm runs non-interactively, saving differing files for later manual processing. .It Fl d Diff mode. In this mode, .Nm will not take any automatic action, allowing for a full diff comparison. .It Fl s Op Ar src \*(Ba etcXX.tgz Specify a path to an .Ox top src directory or an etcXX.tgz tarball. A tarball path specified as an FTP or HTTP URL will be passed to ${FETCH_CMD}. .It Fl x Ar 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}. .El .Pp Files and directories can be excluded from comparison by listing them in the file .Pa /etc/sysmerge.ignore , each entry separated by white space or a new line. The following files will always be skipped from comparison: .Pa /etc/*.db , .Pa /etc/mail/*.db , .Pa /etc/passwd , .Pa /etc/motd , .Pa /etc/myname , .Pa /var/db/locate.database , .Pa /var/db/sysmerge/etcsum , .Pa /var/db/sysmerge/xetcsum , .Pa /var/games/tetris.scores , .Pa /var/mail/root . .Pp The .Xr sendmail 8 configuration files .Pa /etc/mail/localhost.cf , .Pa /etc/mail/sendmail.cf and .Pa /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. .Sh ENVIRONMENT .Bl -tag -width "DESTDIRXXX" .It Ev DBDIR Directory in which checksum files are stored. If unset, this defaults to .Pa /var/db/sysmerge . .It Ev DESTDIR Directory in which to merge and install files. If unset, this defaults to .Pa / . .It Ev EDITOR , VISUAL Specifies an editor to use. If both .Ev EDITOR and .Ev VISUAL are set, .Ev VISUAL takes precedence. If neither .Ev EDITOR nor .Ev VISUAL are set, the default is .Xr vi 1 . .It Ev FETCH_CMD Command used to fetch remote files. Defaults to .Xr ftp 1 . .It Ev FTP_KEEPALIVE Have .Xr ftp 1 send a byte after every .Ev FTP_KEEPALIVE seconds, so that incorrectly configured network equipment won't aggressively drop it. See .Dq ftp -k for more information. .It Ev 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 .Dq sdiff -as -w ${SWIDTH} -o . .It Ev PAGER Specifies the pagination program to use. .It Ev REPORT Log summary which may contain information for further, manual, updating. Defaults to .Pa ${WRKDIR}/sysmerge.log . .It Ev SM_PATH A URI, specifying the directory to search for sets if none are specified on the command line. .It Ev TMPDIR Directory in which the work directory is created. If unset, this defaults to .Pa /var/tmp . .El .Sh FILES .Bl -tag -width "${TMPDIR}/sysmerge.XXXXXXXXXX" -compact .It ${TMPDIR}/sysmerge.XXXXXXXXXX Default work directory. The .Sy temproot and .Sy backup directories are created relative to this. .It ${WRKDIR}/sysmerge.log Default log file. .It /etc/sysmerge.ignore Files and directories to ignore from comparison. .El .Sh SEE ALSO .Xr cap_mkdb 1 , .Xr chpass 1 , .Xr diff 1 , .Xr mktemp 1 , .Xr more 1 , .Xr sdiff 1 , .Xr groupadd 8 , .Xr MAKEDEV 8 , .Xr makemap 8 , .Xr mtree 8 , .Xr newaliases 8 , .Xr pwd_mkdb 8 .Pp .Pa /usr/src/etc/Makefile .Pp .Lk http://www.openbsd.org/faq/current.html .Lk http://www.openbsd.org/faq/upgradeXX.html .Sh HISTORY The .Nm script first appeared in .Ox 4.4 . .Sh AUTHORS .An -nosplit The .Nm shell script was written by .An Antoine Jacoutot Aq Mt ajacoutot@openbsd.org using .Fx mergemaster written by .An Douglas Barton Aq Mt DougB@FreeBSD.org as a base.