Shell Programming and Scripting

Table 29.5. Fields Returned by stat
Index Field Meaning 
0 $dev Device number of filesystem 
1 $ino Inode number 
2 $mode File mode (type and permissions) 
3 $nlink Number of (hard) links to the file 
4 $uid Numeric user ID of file's owner 
5 $gid Numeric group ID of file's designated group 
6 $rdev The device identifier (special files only) 
7 $size Total size of file, in bytes 
8 $atime Last access time in seconds since the epoch 
9 $mtime Last modify time in seconds since the epoch 
10 $ctime Inode change time (not creation time!) in seconds since the epoch 
11 $blksize Preferred blocksize for file system I/O 
12 $blocks Actual number of blocks allocated

$ cd /path/to/archive
$ du -sk *
60000     archive1
55000     archive2
20000     archive3
10        myfile.txt
20        report.txt

#!/usr/bin/ksh 

#----missing some code here to loop thru each sub-dir
#    and load the names and used space into into arrays
#----I'll just hard-code some values
dirname[0]=archive1
dirsize[0]=60000
dirname[1]=archive2
dirsize[1]=55000
#---etc

#---2nd loop: move files into archives
du -sk *|while read filesize filename
do
    #----only process plain files
    [ -f $filename ] || continue
    #----missing some code here to choose a sub-directory
    #     depending on the free space available and
    #     the size of the file.
    #----I'll just use the first one: set array index to 0
    idx=0   
    #----move file to sub-directory
    mv $filename ${dirname[$idx]}
    #----update directory array with the new size
    dirsize[$idx]=$(( ${dirsize[$idx]}+filesize ))
done