Hi friends,

I am using below script to gzip files after naming them in a particular order.
but I intend to name them in numerical order as per their timings(earlier updated fle with a smaller numeric extension than later updated),but this script is not working as planned.
please help with this.

 
func_grease_logs_gzip ()
{
v1=`ls -lrt | grep "gz$" | awk '{print $9}' | cut -d "." -f 3 | tail -1`
v2=1
find . -type f \( -name 'grease*' -a ! -name '*.gz' -a ! -newer ${REFERENCE} \) -print | while read FILENAME
do
  v1=`expr $v1 + $v2`
  v3=`echo  ${FILENAME} | cut -d "." -f 1,2`
  mv ${FILENAME} $v3.$v1
  gzip $v3.$v1
done
}

What does it do? Please give examples, including example before and after filenames.
You might find that using the current date and time as a suffix is easier to code.

Hi Methyl,

script performs below operation

suppose i have below files in a directory

 
 
-rw-r--r--   1 asgadmin1 bea815    756669 Jun  4 19:53 greaseRetry.log.236.gz
-rw-r--r--   1 asgadmin1 bea815    766149 Jun  5 19:45 greaseRetry.log.237.gz
-rw-r--r--   1 asgadmin1 bea815    732137 Jun  6 19:36 greaseRetry.log.238.gz
-rw-r--r--   1 asgadmin1 bea815   1858851 Jun  7 13:29 greaseBatch.log.239.gz
-rw-r--r--   1 asgadmin1 bea815    675340 Jun  7 19:27 greaseRetry.log.240.gz
-rw-r--r--   1 asgadmin1 bea815    762870 Jun  7 20:01 greaseRetry.log.241.gz
-rw-r--r--   1 asgadmin1 bea815    190537 Jun  7 20:15 greaseRetry.log.242.gz
-rw-r--r--   1 bea815   bea815    802449 Jun  8 20:06 greaseRetry.log.243.gz
-rw-r--r--   1 bea815   bea815    774030 Jun  9 19:42 greaseRetry.log.244.gz
-rw-r--r--   1 bea815   bea815    774030 Jun  9 19:43 greaseRetry.log.1
-rw-r--r--   1 bea815   bea815    774030 Jun  9 19:44 greaseRetry.log.2
-rw-r--r--   1 bea815   bea815    774030 Jun  9 19:45 greaseRetry.log

-rw-r--r--   1 bea815   bea815    774030 Jun  9 19:42 greaseRetry.log.244.gz

-rw-r--r--   1 bea815   bea815    774030 Jun  9 19:43 greaseRetry.log.1
-rw-r--r--   1 bea815   bea815    774030 Jun  9 19:44 greaseRetry.log.2
-rw-r--r--   1 bea815   bea815    774030 Jun  9 19:45 greaseRetry.log

-rw-r--r--   1 bea815   bea815    774030 Jun  9 19:43 greaseRetry.log.245.gz
-rw-r--r--   1 bea815   bea815    774030 Jun  9 19:44 greaseRetry.log.246.gz
-rw-r--r--   1 bea815   bea815    774030 Jun  9 19:45 greaseRetry.log247.gz

Infortunately the suffix on the unzipped files does not seem to relate to the timestamp or we could have used that to increment the new suffix.

Armed with the knowledge that there are small number of files per run, the following construct should work in order to process the files in chronological order within the loop. Note that this is ls-hyphen-one (not ls-hyphen-ell). All we are doing extra is placing the output of find onto a ls line so we can sort by timestamp. This technique does not work if any filenames contain space characters.

ls -1tr $(find ..... ) 2>/dev/null | while read FILENAME
do

done

thanks Methyl,
this code is placing the files in chronological order but here i am facing a issue

 
YYYYMMDD="`date +%Y%m%d`"       # Reversed date yyyymmdd
REFERENCE=/tmp/reference.${YYYYMMDD}.$$
touch -t ${YYYYMMDD}0000 ${REFERENCE}   # First thing today
v1=`ls -lrt | grep "gz$" | awk '{print $9}' | cut -d "." -f 3 | tail -1`
v2=1
ls -1tr $(find . -type f \( -name 'grease*' -a ! -name '*.gz' -a ! -newer ${REFERENCE} \) -print) 2>/dev/null | while read FILENAME
do
                v1=`expr $v1 + $v2`
                v3=`echo  ${FILENAME} | cut -d "." -f 1,2`
                echo  $v1
                mv ${FILENAME} $v3.$v1
  gzip $v3.$v1
done

 
expr: non-numeric argument
./greaseBatch.
expr: syntax error
./greaseRetry.
expr: syntax error

 
 
v1=$(($v1 + $v2))

Try diagnostic echoes of the values of $v1 and $v2.
More likely that this line is picking up the wrong file. Are there other gzip files in this directory which do not start with "grease" ?
Perhaps try:

v1=`ls -1rt grease*.gz 2>/dev/null | cut -d "." -f 3 | tail -1`

thanks methyl,
above problem is resolved.
but i am facing a issue for below command

 
ls -1tr $(find . -type f \( -name 'grease*' -a ! -name '*.gz' -a ! -newer ${REFERENCE} \) -print) 2>/dev/null

find . -type f \( -name 'grease*' -a ! -name '*.gz' -a ! -newer ${REFERENCE} \) -print

find . -type f \( -name 'grease*' -a ! -name '*.gz' -a ! -newer ${REFERENCE} \) -print

 
ls -1tr $(find . -type f \( -name 'grease*' -a ! -name '*.gz' -a ! -newer ${REFERENCE} \) -print) 2>/dev/null