CODEWITHSUNDEEP
shellunixshunix-timestampsolaris-10
user3484214
user3484214

Reputation: 41

How to check if a file is older than 30 minutes in unix

I've written a script to iterate though a directory in Solaris. The script looks for files which are older than 30 minutes and echo. However, my if condition is always returning true regardless how old the file is. Someone please help to fix this issue.

for f in `ls -1`;
# Take action on each file. $f store current file name
do
  if [ -f "$f" ]; then
  #Checks if the file is a file not a directory
  if test 'find "$f" -mmin +30'
  # Check if the file is older than 30 minutes after modifications
  then
     echo $f is older than 30 mins
  fi
 fi
 done

Upvotes: 3

Views: 12985

Answers (3)

Melanie
Melanie

Reputation: 21

Since you are iterating through a directory you could try the below command which will find all files ending with log type edited in the past 30 min. Using:

  • -mmin +30 would give all files edited before 30 minutes ago

  • -mmin -30 would give all files that have changed within the last 30 minutes

 

find ./ -type f -name "*.log" -mmin -30 -exec ls -l {} \;

Upvotes: 2

Adrian Frühwirth
Adrian Frühwirth

Reputation: 45656

  1. You should not parse the output of ls
  2. You invoke find for every file which is unnecessarily slow

You can replace your whole script with

find . -maxdepth 1 -type f -mmin +30 | while IFS= read -r file; do
    [ -e "${file}" ] && echo "${file} is older than 30 mins"
done

or, if your default shell on Solaris supports process substitution

while IFS= read -r file; do
    [ -e "${file}" ] && echo "${file} is older than 30 mins"
done < <(find . -maxdepth 1 -type f -mmin +30)

If you have GNU find available on your system the whole thing can be done in one line:

find . -maxdepth 1 -type f -mmin +30 -printf "%s is older than 30 mins\n"

Upvotes: 4

Reinstate Monica Please
Reinstate Monica Please

Reputation: 11613

Another option would be to use to check the time. Something like below should work. 

for f in *
# Take action on each file. $f store current file name
do
  if [ -f "$f" ]; then
    #Checks if the file is a file not a directory
    fileTime=$(stat --printf "%Y" "$f")
    curTime=$(date +%s)
    if (( ( ($curTime - $fileTime) / 60 ) < 30 ))
      echo "$f is less than 30 mins old"
    then
      echo "$f is older than 30 mins"
    fi
  fi
done

Upvotes: 1

Related Questions