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Full Discussion: Making a script to copy files not seen before (using md5sum)
Top Forums Shell Programming and Scripting Making a script to copy files not seen before (using md5sum) Post 302848957 by nbsparks on Friday 30th of August 2013 01:34:46 PM
Old 08-30-2013
Thank you for suggestions. But rsync is not my solution. I want to be able to delete all the files in the $DST folder but yet not have files copy over again, even if the $DST is empty and the $SRC is full. Bottom line, if the files that are "currently" in $SRC have already been copied once over to $DST, then the don't copy again (unless I intentionally restart be deleting the MD5 list).

I was ponder this code last night too and I realized that it's just parsing a filename in an MD5 list. It's almost like I need to do something like this...

Code:
#!/bin/bash

USER=$1
SRC=/user/$USER/.phonesync/photos-backup
DST=/user/$USER/.phonesync/photos-new
MD5=/user/$USER/.phonesync/photos-backup.md5

for f in $SRC/*
do
  FMD5=md5sum $f
  grep -q $FMD5 $MD5
  if [[ $? -ne 0 ]]; then
    cp $SRC/$f $DST
    md5sum $f >> $MD5
  fi
done

Unfortunately, I'm not where I can test this right now, but does that seem like it would work?

---------- Post updated at 10:34 AM ---------- Previous update was at 09:39 AM ----------

OK... I had a moment to test a script and this is what happened.

Here are the two directories I'm working with as a sample:
Code:
nick@server ~$ ls t* -a -l
test1:
total 12
drwxr-xr-x 2 nick nick 4096 Aug 30 10:12 .
drwxr-xr-x 7 nick nick 4096 Aug 30 10:20 ..
-rw-r--r-- 1 nick nick   51 Aug 30 10:28 testfile1.jpg

test2:
total 8
drwxr-xr-x 2 nick nick 4096 Aug 30 10:09 .
drwxr-xr-x 7 nick nick 4096 Aug 30 10:20 ..

Here is my code:
Code:
#!/bin/bash

# The source directory where the photo folder on the phone is mirrored to
SRC=test1

# The destination directory where we want to copy only new photos we have copied before
DST=test2

# The MD5 list file that tracks which files we have copied before
MD5=test1.md5

# Check files against the MD5 list and then copy if not previously copied
# Then add the md5 for that file to the MD5 list
for f in $SRC/*
do
  FMD5=md5sum $f
  grep -q $FMD5 $MD5
  if [[ $? -ne 0 ]]; then
    cp $SRC/$f $DST
    md5sum $f >> $MD5
  fi
done

Here is the output:
Code:
nick@server ~$ ./copy.sh
./copy2.sh: line 16: test1/testfile1.jpg: Permission denied

Anyone tell me where I went wrong?
 

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LEARN ABOUT DEBIAN

ii

ii(1)							      General Commands Manual							     ii(1)

NAME

       ii - irc it or irc improved

DESCRIPTION

       ii  is  a  minimalistic FIFO and filesystem based IRC client.  It creates an irc directory tree with server, channel and nick name directo-
       ries.  In every directory a FIFO file (in) and and normal file (out) is placed. This will be for example ~/irc/irc.freenode.net/.   The	in
       file  is  used  to communicate with the servers and the out files includes the server messages. For every channel and every nick name there
       will be new in and out files.  The basic idea of this is to be able to communicate with an IRC server with basic command line  tools.   For
       example if you will join a channel just do echo "/j #channel" > in and ii creates a new channel directory with in and out file.

SYNOPSIS

       ii [-s servername] [-p port] [-k password] [-i prefix] [-n nickname] [-f realname]

OPTIONS

       -s servername
	      lets you override the default servername (irc.freenode.net)

       -p port
	      lets you override the default port (6667)

       -k password
	      lets  you  use a password to authenticate your nick on the server (be aware of the problem that this is visible in the process list,
	      if you don't want this use a query to submit your password)

       -i prefix
	      lets you override the default irc path (~/irc)

       -n nickname
	      lets you override the default nick ($USER)

       -f realname
	      lets you specify your real name associated with your nick

DIRECTORIES

       ~/irc  In this directory the irc tree will be created. In this directory you will find a directory for  your  server  (default:	irc.freen-
	      ode.net)	in  which the FIFO and the output file will be stored.	If you join a channel a new directory with the name of the channel
	      will be created in the ~/irc/$servername/ directory.

COMMANDS

       /a [<message>]
	      mark yourself as away

       /j #channel/nickname [<message>]
	      join a channel or open private conversation with user

       /l #channel/nickname
	      leave a channel or query

       /n nick
	      change the nick name

       /t topic
	      set the topic of a channel

       Everything which is not a command will simply be posted into the channel or to the server.
	      So if you need /who just write /WHO as described in the RFC to the server in FIFO.

       out file usage
	      Write wrappers, pagers or use your tools of choice to display the out file contents (loco, multitail, etc.).

CONTACT

       Write to ii (at) modprobe (dot) de for suggestions, fixes, 7|-|>< ;) etc.

AUTHORS

       Copyright (C) 2005-2006 by Anselm R. Garbe <garbeam (at) gmail (dot) com> and Copyright (C) 2005-2008 by Nico Golde <nico (at) ngolde (dot)
       de>

SEE ALSO

       echo(1), tail(1),

																	     ii(1)
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