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Full Discussion: Cp & skipping exiting files
Top Forums Shell Programming and Scripting Cp & skipping exiting files Post 302962974 by Don Cragun on Monday 21st of December 2015 03:09:56 PM
Old 12-21-2015
Assuming that you just want to copy files from the directory /p2/arch/log (and not from subdirectories of that directory), you could try something like the following. It is untested, but should come close to what you were trying to do:
Code:
cd /p2/arch/log
for f in *
do	[ -f "$f" ] || continue		# If this isn't a regular file, skip it.
	[ -e "/p2/bkp/$f" ] && continue	# If a backup already exists, skip it.
	cp "$f" /p2/bkp			# Make a backup copy.
done

This should work with any shell based on Bourne shell syntax (e.g., ash, bash, dash, ksh, sh,zsh, etc.), but will not work with csh and its derivatives.
This User Gave Thanks to Don Cragun For This Post:
Daniel Gate
 

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use

USE(1)								   User Commands							    USE(1)

NAME

       use - Frontend to the Usepackage Environment Manager

SYNOPSIS

       csh and derivatives:
	       source /usr/share/usepackage/use.csh

       bourne shell and derivatives:
	       source /usr/share/usepackage/use.bsh

       korn shell:
	       . /usr/share/usepackage/use.ksh

       use [-vs] [-f file] package ...

       use -l

DESCRIPTION

       Usepackage  is an environment management program. It is based on the principle of packages - collections of executables that share a common
       set of necessary environment variables, such as PATH, MANPATH or LD_LIBRARY_PATH.

       For each given package, use sources the appropriate environment information into the current shell.  The environment information is  speci-
       fied in a configuration file, see usepackage(1).

   OPTIONS
       -v     Output verbose information to the standard error stream.

       -s     Silence  warnings  for  un-matched  packages. This is useful in a shell rc script when a package is known not to be available on all
	      architectures that the shell is used on.

       -f file
	      Specify an alternate initial configuration file.

       -l     List available packages and groups.

FILES

       /usr/share/usepackage/usepackage.conf
		      The default configuration file.

       /usr/share/usepackage/use.csh
		      Shell setup for csh and derivatives.

       /usr/share/usepackage/use.bsh
		      Shell setup for bourne shell and derivatives.

       /usr/share/usepackage/use.ksh
		      Shell setup for ksh.

       /usr/bin/usepackage
		      The underlying Usepackage executable.

ENVIRONMENT

       Other than the reading and re-definition of environment variables for package setup, use also uses the following environment variables  for
       user configuration:

       PACKAGES_PATH  Colon-separated  path  list  giving  the directories to search for configuration files. Shell-style tilde (~) user-directory
		      escapes are expanded.

       HOME	      If present in the environment, this is used to provide the expansion for the tilde (~) user-directory.

       SHELL	      If present in the environment, the last path component of this is used for shell matching (see  SYNTAX)  and  detecting  the
		      style of environment output that should be used, see usepackage(1).

COPYRIGHT

       Usepackage Environment Manager
       Copyright (C) 1995-2005	Jonathan Hogg

       This  program  is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by
       the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

       This program is distributed in the hope that it will be useful, but WITHOUT ANY	WARRANTY;  without  even  the  implied	warranty  of  MER-
       CHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.

       You  should  have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation,
       Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

SEE ALSO

       usepackage(1), csh(1), sh(1), ksh(1)

Usepackage						   $Date: 2005/12/11 16:42:09 $ 						    USE(1)
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