help with a 'while read' loop to change the names of files Post: 302171958

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Top Forums Shell Programming and Scripting help with a 'while read' loop to change the names of files Post 302171958 by ghostdog74 on Saturday 1st of March 2008 10:26:44 AM

03-01-2008

Registered User

Code:

#!/bin/sh

path="/path/oldnames"
newpath="/path/newname"
ls $path | awk -v path=$path -v newpath=$newpath ' pass the variables path and newpath to awk
BEGIN{ 
  # this "BEGIN" block will be executed first before any input record is processed
 q="\047"  # set variable q to contain the single quote
 while( (getline f < "names" ) > 0 ) { 
   # get the contents of "names" file, using f to store each line as the while loop iterates the file
   # then store the value of each line (f) to array "a". "c" is the index of the array
   a[++c]=f
 } 
 close("names") # close the file
}
{
  # process the results of "ls" command, putting each file listed into array "b", and increment the index
 b[++d]=$0  # 
}
END{
  # the below is done at the very end of processing the inputs.
  for ( i=1; i<=c;i++) {
    cmd="cp "q path"/"b[i] q" "q newpath"/"a[i]q
    print cmd
    #system(cmd) #uncomment to execute
  }
}
'

Last edited by ghostdog74; 03-01-2008 at 10:04 PM..

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rscript

Rscript(1)								FSF								Rscript(1)

NAME

       Rscript - front end for scripting with R

SYNOPSIS

       Rscript [--options] [-e expr] file [args]

DESCRIPTION

       A binary front-end to R, for use in scripting applications.

       expr   An optional expression to be evaluated, used in place of expr.

       file   Input file of R expressions

       args   Optional further arguments to be processed by commandArgs in the R interpreter.

OPTIONS

       --options accepted are

       --help Print usage and exit

       --version
	      Print version and exit

       --verbose
	      Print information on progress

       --default-packages=list
	      Where 'list' is a comma-separated set of package names, or 'NULL'

       and also options to R (in addition to --slave --no-restore), such as

       --save Do save workspace at the end of the session

       --no-environ
	      Don't read the site and user environment files

       --no-site-file
	      Don't read the site-wide Rprofile

       --no-init-file
	      Don't read the user R profile

       --restore
	      Do restore previously saved objects at startup

       --vanilla
	      Combine --no-save, --no-restore, --no-site-file --no-init-file and --no-environ

SEE ALSO

       R(1)

R scripting							    April 2007								Rscript(1)

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