recursive search and ftp Post: 302512153

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Top Forums UNIX for Dummies Questions & Answers recursive search and ftp Post 302512153 by DGPickett on Friday 8th of April 2011 01:32:51 PM

04-08-2011

Registered User

This should be simple, even with an ftp layer.

Do you need to worry about copying a file while being written? If so, you can detect others on the file with fuser. Can you wait on the writer to finish, near term? Are there other local readers that would confuse fuser? Can you make the files you want to move read-only, immediately once created, so implicity there are not being written?

First, both sender and recipient will cd to the head dir over the subtree in question. I like to use "find * -type f -newer /elsewhere/mark_file ! -newer /elsewhere/mark_next" and a marker file created with touch. 'touch' a new file at the start of every cycle, /elsewhere/mark_next. Then sleep a second so anything written in that second and also the next will be excluded. Sleep longer if it helps eliminate files being written. After the find and send, "mv /elsewhere/mark_next /elsewhere/mark_file" to support the next batch, seamlessly. Pipe the find to a "while read f" do loop that knows how to check for writing users and ftp the file using relative paths. If the files to be moved are read-only, test with 'if [ -w "$f" ]' and if writable, 'touch' their modify time forward so they are considered on the next pass.

Last edited by DGPickett; 04-08-2011 at 02:38 PM..

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LEARN ABOUT OPENSOLARIS

touch

touch(1B)					     SunOS/BSD Compatibility Package Commands						 touch(1B)

NAME

       touch - change file access and modification times

SYNOPSIS

       /usr/ucb/touch [-acfm] file...

DESCRIPTION

       touch sets the access and modification times of each file to the current time. file is created if it does not already exist.

OPTIONS

       -a    Change the access time of file. Do not change the modification time unless -m is also specified.

       -c    Do not create file if it does not exist.

       -f    Attempt to force the touch in spite of read and write permissions on file.

       -m    Change the modification time of file. Do not change the access time unless -a is also specified.

USAGE

       See largefile(5) for the description of the behavior of touch when encountering files greater than or equal to 2 Gbyte ( 2^31 bytes).

EXIT STATUS

       The following exit values are returned:

       0     touch executed successfully and all requested changes were made.

       >0    An error occurred. touch returns the number of files for which the times could not be successfully modified.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWscpu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       touch(1), attributes(5), largefile(5)

SunOS 5.11							    26 Oct 1995 							 touch(1B)