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 LINUX

shtool-move

SHTOOL-MOVE.TMP(1)					      GNU Portable Shell Tool						SHTOOL-MOVE.TMP(1)

NAME

       shtool-move - GNU shtool enhanced mv(1) replacement

SYNOPSIS

       shtool move [-v|--verbose] [-t|--trace] [-e|--expand] [-p|--preserve] src-file dst-file

DESCRIPTION

       This is a mv(1) style command enhanced with the ability to rename multiple files in a single operation and the ability to detect and not
       touch existing equal destinations files, thus preserving timestamps.

OPTIONS

       The following command line options are available.

       -v, --verbose
	   Display some processing information.

       -t, --trace
	   Enable the output of the essential shell commands which are executed.

       -e, --expand
	   Expand asterisk in src to be used as ""%"n" (where n is 1,2,...) in dst-file. This is useful for renaming multiple files at once.

       -p, --preserve
	   Detect src-file and dst-file having equal content and not touch existing destination files, thus perserving timestamps. This is useful
	   for applications that monitor timestamps, i.e. suppress make(1L) repeating actions for unchanged files.

EXAMPLE

	#   shell script
	shtool move -v -e '*.txt' %1.asc

	#   Makefile
	scanner.c: scanner.l
	    lex scanner.l
	    shtool move -t -p lex.yy.c scanner.c

HISTORY

       The GNU shtool move command was originally written by Ralf S.  Engelschall <rse@engelschall.com> in 1999 for GNU shtool.

SEE ALSO

       shtool(1), mv(1), make(1).

18-Jul-2008							   shtool 2.0.8 						SHTOOL-MOVE.TMP(1)