76 lines
3.0 KiB
Groff
76 lines
3.0 KiB
Groff
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.TH SYNCTREE 1
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.SH NAME
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synctree \- synchronize directory trees.
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.SH SYNOPSIS
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.nf
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\fBsynctree\fP [\fB\-iuf\fP] [[\fIuser1\fP@]\fImachine1\fP:]\fIdir1\fP [[\fIuser2\fP@]\fImachine2\fP:]\fIdir2\fP
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.fi
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.SH DESCRIPTION
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.B Synctree
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synchronizes the directory tree rooted at \fIdir2\fP with \fIdir1\fP. It
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walks recursively through both trees, and deletes and adds files in
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\fIdir2\fP to make it equal to \fIdir1\fP. Mode, owner and group are set for
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each file unless the \fB\-u\fP flag is given. In its normal mode of operation,
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synctree will ask if it may delete or add directories assuming that you don't
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want to. Non-directories are simply deleted or added, but synctree will ask if
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it needs to update a normal file with a default answer of 'y'. Simply typing
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return will choose the default answer, typing end-of-file is like typing
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return to this question and all other questions.
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.PP
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You can specify a hostname and user-id to be used to access \fIdir1\fP or
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\fIdir2\fP. Synctree will use \fBrsh\fP(1) to run a copy of itself on
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the remote machine. The call interface mimics that of \fBrcp\fP(1), but
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you can use more than one user@machine prefix if you want to make things
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really interesting.
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.PP
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Hard links are enforced, an update is done by first deleting the old file
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so that links to unknown files are broken. Links to files within \fIdir2\fP
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will be restored.
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.PP
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If either directory contains the file \fB.backup\fP, then this file will
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be used as an alternate inode table. This allows one to make a backup copy
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of a file tree full of special files and differing user-ids on a remote
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machine under an unpriviledged user-id.
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.PP
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.SH OPTIONS
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.TP 5
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.B \-i
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Ask for permission (with default answer 'n') to delete or
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add any file or directory.
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.TP 5
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.B \-u
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Only install newer files, i.e. merge the directory trees.
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.TP 5
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.B \-f
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Don't ask, think 'yes' on any question.
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.SH "SEE ALSO"
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.BR remsync (1),
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.BR rsh (1),
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.BR rcp (1),
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.BR perror (3).
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.SH DIAGNOSTICS
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Messages may come from three different processes. One named "Slave" running
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in \fIdir1\fP, one named "Master" running in \fIdir2\fP, and synctree itself
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in a mediator role. The mediator will also perform the task of either the
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master or the slave if one of them is running locally. You need to know this
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to interpret the error messages coming from one of these processes. The
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messages are normally based on \fBperror\fP(3). Failure to contact a remote
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machine will be reported by \fBrsh\fP. \fBSynctree\fP should have a zero
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exit status if no errors have been encountered.
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.SH BUGS
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Directory \fIdir2\fP will be created without asking.
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.PP
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The master and slave processes get their error output mixed up sometimes
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(nice puzzle).
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.PP
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The local and remote machine must use the same file type encoding.
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.PP
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The link replacement strategy may lead to lack of space on a small device.
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Let \fBsynctree\fP run to completion and then rerun it to pick up the pieces.
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.PP
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Letting the local process keep its "synctree" name may be a mistake.
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.PP
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It talks too much.
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.SH AUTHOR
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Kees J. Bot, (kjb@cs.vu.nl)
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