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Full Discussion: While loop a file containing list of file names until the files are found?
Top Forums Shell Programming and Scripting While loop a file containing list of file names until the files are found? Post 302941641 by Scrutinizer on Saturday 18th of April 2015 07:13:32 PM
Old 04-18-2015
Hi, it can be done with arrays, like Don Cragun suggested. One way would be to use associative arrays (it could also be done with regular arrays). For example:

Code:
#!/bin/ksh
typeset -A files

while read f
do
  files["$f"]=
done < /home/user/ctlfile.txt

until [ ${#files[@]} -eq 0 ]
do
  for f in "${!files[@]}"
  do
    if [ -e "/data/project/US/$f" ]; then
      unset files["$f"]
    fi
  done 
  sleep 1
done

printf "%s\n" "All files are present."

This is just a rudimentary example you could try, checks would need to be added and some extra code to break it off after two hours ...



--
Note that the method you are proposing has a potential flaw, if it can happen that a file is placed in the directory and suequently removed then it will still be wrongfully reported as present...
So it may be advisable to have an extra final check for all files that need to be present..
Last edited by Scrutinizer; 04-19-2015 at 04:04 AM..
 

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LEARN ABOUT DEBIAN

prename

RENAME(1)						 Perl Programmers Reference Guide						 RENAME(1)

NAME

       rename - renames multiple files

SYNOPSIS

       rename [ -v ] [ -n ] [ -f ] perlexpr [ files ]

DESCRIPTION

       "rename" renames the filenames supplied according to the rule specified as the first argument.  The perlexpr argument is a Perl expression
       which is expected to modify the $_ string in Perl for at least some of the filenames specified.	If a given filename is not modified by the
       expression, it will not be renamed.  If no filenames are given on the command line, filenames will be read via standard input.

       For example, to rename all files matching "*.bak" to strip the extension, you might say

	       rename 's/.bak$//' *.bak

       To translate uppercase names to lower, you'd use

	       rename 'y/A-Z/a-z/' *

OPTIONS

       -v, --verbose
	       Verbose: print names of files successfully renamed.

       -n, --no-act
	       No Action: show what files would have been renamed.

       -f, --force
	       Force: overwrite existing files.

ENVIRONMENT

       No environment variables are used.

AUTHOR

       Larry Wall

SEE ALSO

       mv(1), perl(1)

DIAGNOSTICS

       If you give an invalid Perl expression you'll get a syntax error.

BUGS

       The original "rename" did not check for the existence of target filenames, so had to be used with care.	I hope I've fixed that (Robin
       Barker).

perl v5.14.2							    2014-09-26								 RENAME(1)
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