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Full Discussion: Turn For Loop into While Loop
Top Forums Shell Programming and Scripting Turn For Loop into While Loop Post 302339851 by cbo0485 on Friday 31st of July 2009 01:25:51 PM
Old 07-31-2009
Quote:
Originally Posted by jim mcnamara
If you need to start at pos 6 then go on to the end of the line change the awk to
Code:
  .| awk '$1>=5000' {print substr($0,6)

is that what you mean?
What I'm wondering is there a way to make it more dynamic, that way, say a log file decides to start growing like crazy at 01, and my crontab just ran, but won't run again for 29 minutes. If it grows enough to where the size field will be longer than the 4 characters it is now, the variable set by the ls command will be off, either it will have an extra space or it will have a number in it, causing the basename/dirname command to fail.

here's the example of when the script was ran and the size was too many digits:

Code:
size not big enough
size not big enough
dirname: too many arguments
Try `dirname --help' for more information.
./sizeTest.sh: line 13: ./rotate*: No such file or directory
dirname: too many arguments
Try `dirname --help' for more information.
./sizeTest.sh: line 13: ./rotate*: No such file or directory
size not big enough

As you can see the size of the log file had too many characters and screwed up the dirname/basename command:

Code:
ls -s $(find . -name nohup*.out) | cut -d'.' -f 1
    92
    32
166066
 10314
   104

Code:
 ls -s $(find . -name nohup*.out) | cut -b 6-100
2 ./path/to/nohupFile.out
2 ./path/to/nohupFile.out
6 ./path/to/nohupFile.out
4 ./path/to/nohupFile.out
4 ./path/to/nohupFile.out

I tried using a '.' as the delimiter, but that screws it up b/c then it delimit's the .out as well, so it doesn't pick up the entire filename.

---------- Post updated at 01:25 PM ---------- Previous update was at 01:18 PM ----------

Played with it a bit more, I think I got the dynamic part down:


Code:
#!/bin/sh
baseDirVar="/opt/user/"
cd ${baseDirVar}
sizeVar=`ls -s $(find . -name nohup*.out) | cut -d'.' -f 1`
for i in $sizeVar
do
        if [ "$i" -ge "1000" ];
                then
                        dirVar=`ls -s $(find . -name nohup*.out) | grep $i | cut -d'.' -f 2`
                        curFile=`basename .${dirVar}.out`
                        curDir=`dirname .${dirVar}.out`
                        cd ${curDir}
#                       ./rotate*
                        pwd;echo "${curDir}/${curFile}"
                        cd ${baseDirVar}
                        curFile=''
                        curDir=''
                else
                        curFile=''
                        curDir=''
                        echo "size not big enough"
                        cd ${baseDirVar}
        fi
done

I cahnged the cut line to do it by period, but then for curFile and curDir I just added the period in front of and the .out behind the variable and the dirname and basename command's ran fine. I had to change it to 1000 for the size, rather than the 5000, that way I'd get some results.

Now, this one ran even a bit slower than before, but that is probably b/c I had like 6 results instead of just 1 or 2.
 

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