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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 MOJAVE

zmore

ZMORE(1)						    BSD General Commands Manual 						  ZMORE(1)

NAME

     zmore, zless -- view compressed files

SYNOPSIS

     zmore [flags] [file ...]
     zless [flags] [file ...]

DESCRIPTION

     zmore is a filter that allows the viewing of files compressed with Lempel-Ziv encoding.  Such files generally have a ``Z'' or ``gz'' exten-
     sion (both the compress(1) and gzip(1) formats are supported).  Any flags that are specified are passed to the user's preferred PAGER (which
     is /usr/bin/more by default).

     zless is equivalent to zmore but uses less(1) as a pager instead of more(1).

     When multiple files are specified, zmore will pause at the end of each file and present the following prompt to the user:

	   prev_file (END) - Next: next_file

     Where prev_file is the file that was just displayed and next_file is the next file to be displayed.  The following keys are recognized at the
     prompt:

	   e or q  quit zmore.

	   s	   skip the next file (or exit if the next file is the last).

     If no files are specified, zmore will read from the standard input.  In this mode zmore will assume gzip(1) style compression since there is
     no suffix on which to make a decision.

ENVIRONMENT

     PAGER  Program used to display files.  If unset, /usr/bin/more is used (zmore) or /usr/bin/less (zless).

SEE ALSO

     compress(1), less(1), more(1)

BSD
								 October 22, 2014							       BSD
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