Usage of find and cp with duplicate Post: 302821211

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Top Forums Shell Programming and Scripting Usage of find and cp with duplicate Post 302821211 by drl on Friday 14th of June 2013 07:49:34 AM

06-14-2013

Registered User

Hi.

Some versions of cp will do a numbered backup for you:

Code:

#!/usr/bin/env bash

# @(#) s1	Demonstrate cp making "backup" copies of file that exist.

# Utility functions: print-as-echo, print-line-with-visual-space, debug.
# export PATH="/usr/local/bin:/usr/bin:/bin"
pe() { for _i;do printf "%s" "$_i";done; printf "\n"; }
pl() { pe;pe "-----" ;pe "$*"; }
db() { ( printf " db, ";for _i;do printf "%s" "$_i";done;printf "\n" ) >&2 ; }
db() { : ; }
C=$HOME/bin/context && [ -f $C ] && $C cp

FILE=data
N=${1-3}

pl " Input data file $FILE, making $N copies:"
cat $FILE

rm -rf d1
mkdir d1
pl " Initial content of directory d1:"
ls d1

pl " Content after making $N copies:"
for i in $( seq 1 $N )
do
  pe " Making copy $i"
  cp --backup=numbered $FILE d1
done
ls d1

exit 0

producing:

Code:

% ./s1

Environment: LC_ALL = C, LANG = C
(Versions displayed with local utility "version")
OS, ker|rel, machine: Linux, 2.6.26-2-amd64, x86_64
Distribution        : Debian GNU/Linux 5.0.8 (lenny) 
bash GNU bash 3.2.39
cp (GNU coreutils) 6.10

-----
 Input data file data, making 3 copies:
Now is the time.

-----
 Initial content of directory d1:

-----
 Content after making 3 copies:
 Making copy 1
 Making copy 2
 Making copy 3
data  data.~1~	data.~2~

See man cp for details.

Best wishes ... cheers, drl

drl

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LEARN ABOUT OPENSOLARIS

shells

shells(4)							   File Formats 							 shells(4)

NAME

       shells - shell database

SYNOPSIS

       /etc/shells

DESCRIPTION

       The shells file contains a list of the shells on the system. Applications use this file to determine whether a shell is valid. See getuser-
       shell(3C). For each shell a single line should be present, consisting of the shell's path, relative to root.

       A hash mark (#) indicates the beginning of a comment; subsequent characters up to the end of the line are not interpreted by  the  routines
       which search the file. Blank lines are also ignored.

       The following default shells are used by utilities: /bin/bash, /bin/csh, /bin/jsh, /bin/ksh, /bin/ksh93, /bin/pfcsh, /bin/pfksh, /bin/pfsh,
       /bin/sh, /bin/tcsh, /bin/zsh, /sbin/jsh, /sbin/sh, /usr/bin/bash, /usr/bin/csh, /usr/bin/jsh, /usr/bin/ksh, /usr/bin/ksh93, /usr/bin/pfcsh,
       /usr/bin/pfksh, /usr/bin/pfsh, and /usr/bin/sh, /usr/bin/tcsh, /usr/bin/zsh, and /usr/sfw/bin/zsh. /etc/shells overrides the default list.

       Invalid shells in /etc/shells could cause unexpected behavior, such as being unable to log in by way of ftp(1).

FILES

       /etc/shells    list of shells on system

SEE ALSO

       vipw(1B), ftpd(1M), sendmail(1M), getusershell(3C), aliases(4)

SunOS 5.11							    20 Nov 2007 							 shells(4)

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