SYNCTREE.1
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- SYNCTREE(1) Minix Programmer's Manual SYNCTREE(1)
- NAME
- synctree - synchronize directory trees.
- SYNOPSIS
- synctree [-iuf] [[user1@]machine1:]dir1 [[user2@]machine2:]dir2
- DESCRIPTION
- Synctree synchronizes the directory tree rooted at dir2 with dir1. It
- walks recursively through both trees, and deletes and adds files in dir2
- to make it equal to dir1. Mode, owner and group are set for each file
- unless the -u flag is given. In its normal mode of operation, synctree
- will ask if it may delete or add directories assuming that you don't want
- to. Non-directories are simply deleted or added, but synctree will ask if
- it needs to update a normal file with a default answer of 'y'. Simply
- typing return will choose the default answer, typing end-of-file is like
- typing return to this question and all other questions.
- You can specify a hostname and user-id to be used to access dir1 or dir2.
- Synctree will use rsh(1) to run a copy of itself on the remote machine.
- The call interface mimics that of rcp(1), but you can use more than one
- user@machine prefix if you want to make things really interesting.
- Hard links are enforced, an update is done by first deleting the old file
- so that links to unknown files are broken. Links to files within dir2
- will be restored.
- If either directory contains the file .backup, then this file will be
- used as an alternate inode table. This allows one to make a backup copy
- of a file tree full of special files and differing user-ids on a remote
- machine under an unpriviledged user-id.
- OPTIONS
- -i Ask for permission (with default answer 'n') to delete or add any
- file or directory.
- -u Only install newer files, i.e. merge the directory trees.
- -f Don't ask, think 'yes' on any question.
- SEE ALSO
- remsync(1), cpdir(1), rsh(1), rcp(1), perror(3).
- DIAGNOSTICS
- Messages may come from three different processes. One named "Slave"
- running in dir1, one named "Master" running in dir2, and synctree itself
- in a mediator role. The mediator will also perform the task of either
- the master or the slave if one of them is running locally. You need to
- know this to interpret the error messages coming from one of these
- processes. The messages are normally based on perror(3). Failure to
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- SYNCTREE(1) Minix Programmer's Manual SYNCTREE(1)
- contact a remote machine will be reported by rsh. Synctree should have a
- zero exit status if no errors have been encountered.
- BUGS
- Directory dir2 will be created without asking.
- The master and slave processes get their error output mixed up sometimes
- (nice puzzle).
- The local and remote machine must use the same file type encoding.
- The link replacement strategy may lead to lack of space on a small
- device. Let synctree run to completion and then rerun it to pick up the
- pieces.
- Letting the local process keep its "synctree" name may be a mistake.
- It talks too much.
- AUTHOR
- Kees J. Bot, (kjb@cs.vu.nl)
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