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Full Discussion: Deleting file basing on the timestamp substring in the file name
Top Forums UNIX for Dummies Questions & Answers Deleting file basing on the timestamp substring in the file name Post 302889449 by thuyetti on Thursday 20th of February 2014 04:20:53 PM
Old 02-20-2014
bakunin,
Thanks again so much for taking young time to help me ( and all of the users here...).
It works like a charm now. Here my code :
Code:
#!/bin/sh
DATE=$(date "+%d-%m-%Y_%Hh%Mm%S")
LOG=/Volumes/BACKUP/LOGS/Trash-$DATE.txt

typeset -i TODAY=$(date +%s)
# numbers of day to keep ( 86400 = 1 day )
NDAYS=86400
BCK_DIR=/Volumes/BACKUP/BCK_DATA/_ARCHIVES_
TRASHDIR=/Volumes/BACKUP/Trash

if [ ! -d "$TRASHDIR" ] ; then
     echo "Error: $TRASHDIR does not exist or is not a directory." >> $LOG
     exit 2
fi

touch "${TRASHDIR}/$$"
if [ $? -gt 0 ] ; then
     echo "Error: $TRASHDIR cannot be written to." >>$LOG
     exit 2
else
     rm "${TRASHDIR}/$$"
fi



ls -1 $BCK_DIR | while read FILE ; do
     TS="${FILE#*+}"
	(( OFFSET = TODAY - $TS ))
     if [ $OFFSET -gt $NDAYS ] ; then   # i.e. range check
          #mv "${BCK_DIR}/${FILE}" "${TRASHDIR}/${FILE}"
          mv -v "${BCK_DIR}/${FILE}" "$TRASHDIR" >>$LOG
     fi
done

I don't know why print does not work to output error, so I use echo ( does it matter ? )
And

---------- Post updated at 04:20 PM ---------- Previous update was at 04:16 PM ----------

Bakunin,
I learned so much thanks to you, I'll like to learn more about "modern shell".
Can you please point me to some clues where to start.
Thanks again
Thibault
 

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LEARN ABOUT XFREE86

touch

TOUCH(1)							   User Commands							  TOUCH(1)

NAME

       touch - change file timestamps

SYNOPSIS

       touch [OPTION]... FILE...

DESCRIPTION

       Update the access and modification times of each FILE to the current time.

       A FILE argument that does not exist is created empty, unless -c or -h is supplied.

       A FILE argument string of - is handled specially and causes touch to change the times of the file associated with standard output.

       Mandatory arguments to long options are mandatory for short options too.

       -a     change only the access time

       -c, --no-create
	      do not create any files

       -d, --date=STRING
	      parse STRING and use it instead of current time

       -f     (ignored)

       -h, --no-dereference
	      affect each symbolic link instead of any referenced file (useful only on systems that can change the timestamps of a symlink)

       -m     change only the modification time

       -r, --reference=FILE
	      use this file's times instead of current time

       -t STAMP
	      use [[CC]YY]MMDDhhmm[.ss] instead of current time

       --time=WORD
	      change the specified time: WORD is access, atime, or use: equivalent to -a WORD is modify or mtime: equivalent to -m

       --help display this help and exit

       --version
	      output version information and exit

       Note that the -d and -t options accept different time-date formats.

DATE STRING

       The  --date=STRING is a mostly free format human readable date string such as "Sun, 29 Feb 2004 16:21:42 -0800" or "2004-02-29 16:21:42" or
       even "next Thursday".  A date string may contain items indicating calendar date, time of day, time zone, day of week, relative time,  rela-
       tive  date,  and numbers.  An empty string indicates the beginning of the day.  The date string format is more complex than is easily docu-
       mented here but is fully described in the info documentation.

AUTHOR

       Written by Paul Rubin, Arnold Robbins, Jim Kingdon, David MacKenzie, and Randy Smith.

REPORTING BUGS

       GNU coreutils online help: <http://www.gnu.org/software/coreutils/>
       Report touch translation bugs to <http://translationproject.org/team/>

COPYRIGHT

       Copyright (C) 2017 Free Software Foundation, Inc.  License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
       This is free software: you are free to change and redistribute it.  There is NO WARRANTY, to the extent permitted by law.

SEE ALSO

       Full documentation at: <http://www.gnu.org/software/coreutils/touch>
       or available locally via: info '(coreutils) touch invocation'

GNU coreutils 8.28						   January 2018 							  TOUCH(1)
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