Shell Programming and Scripting

 
20100430235830
20100501000200

touch -t 201004302358.30 file1
touch -t 201005010002.00 file2
time_elap=$(echo `stat -c%Y file2` - `stat -c%Y file1` | bc)
echo $time_elap

perl -MTime::Local -le'
  /(....)(..)(..)(..)(..)(..)/g and
    push @dt, timelocal $6, $5, $4, $3, $2 - 1, $1 - 1900 
      for @ARGV;
  print $dt[1] - $dt[0]; 
  ' dt1 dt2

% perl -MTime::Local -le'
  /(....)(..)(..)(..)(..)(..)/g and
    push @dt, timelocal $6, $5, $4, $3, $2 - 1, $1 - 1900
      for @ARGV;
  print $dt[1] - $dt[0];
  ' 20100430235830 20100501000200
210

$ cat temp.sh
perl -MTime::Local -le'
/(....)(..)(..)(..)(..)(..)/g and
push @dt, timelocal $6, $5, $4, $3, $2 - 1, $1 - 1900
for @ARGV;
print $dt[1] - $dt[0] if eof;
' 20100430235830 20100501000200

$ perl temp.sh
Number found where operator expected at temp.sh line 7, near "' 20100430235830"
  (Might be a runaway multi-line '' string starting on line 2)
        (Missing operator before  20100430235830?)
Number found where operator expected at temp.sh line 7, near "20100430235830 20100501000200"
        (Missing operator before  20100501000200?)
syntax error at temp.sh line 2, near "-le"
Execution of temp.sh aborted due to compilation errors.