Expression error in bash script

bash bash-script

6,321

I've actually made the changes suggested by the 3 guys at the comments and all of them were necessary for the script to work.

Final code below:

temptime=$(date +%s)
temptime=`expr $temptime - 2592000`

for DIR in $DIRS
do
tempdir=$DIR/
echo $tempdir
tempval=$(stat -c %Y $tempdir)
echo $tempval
if [[ $tempval -gt $temptime ]]; then
    echo "Exiting gracefully!!!"
    exit
else
    continue
fi
done

6,321

Vaios Argiropoulos

Updated on September 18, 2022

Comments

Vaios Argiropoulos almost 2 years
I am getting this really weird error despite of the fact that the same script runs fine on one platform (Arch linux) but not on my other mobile platform (Maemo Linux). I'll pass here the relevant part of the code with the line numbering:
```
41 for DIR in $DIRS
42 do
43 tempdir=$DIR/
44 tempval=$(stat -c %Y $tempdir)
45 echo $tempval
46 if (( $tempval > $(date +%s) - 3600*24*30 )); then
47     echo "I am done basically. Exiting..."
48     exit
49 else
50     continue
51 fi
52 done
```
In the code above DIRS is a list which contains names of directories. In this loop i am trying to find one directory of the list which is newer than 30 days old and if i find one i exit the script.

Line 45 is put there for debugging purposes basically.

I am getting the error below:
```
./script.sh : line 52 : 1372757584 : not found
```
After some changes suggested from the comments:

Ok the error now is below:
```
scone.sh: line 46: ((: 1372768246 -gt 1372770593 - 3600*24*30 : syntax error
in expression (error token is "1372770593 - 3600*24*30 ")
```
- Hauke Laging almost 11 years
  
  Please run it as bash -vx ./script.sh. Are the bash versions on the two platforms different? You may use if [ "$tempval" -gt $(($(date +%s) - 3600*24*30)) ] instead.
- tripleee almost 11 years
  
  Is it being run in bash in both instances? And/or could there be a runaway construct which starts somewhere in lines 1-40 which ends at line 52 and expands to the number you see?
- Vaios Argiropoulos almost 11 years
  
  Ok i've actually done both what you suggested. I run on bash and replaced > sign with -gt expression,and now i am getting the error above.See first post for the new error.
- Admin almost 11 years
  
  -gt only works with [ and [[.
- Admin almost 11 years
  
  If you have found a solution to your problem, post it as an answer to this question and accept it.
ott-- almost 11 years

These backticks are hard to read on the screen. You could consider using things like $(expr $temptime - 2592000) instead.