solaris - du (1)

     du - summarize disk usage

     /usr/bin/du [ -adkr ] [ -s | -o ] [ file ... ]
     /usr/xpg4/bin/du [ -a | -s ] [ -krx ] [ file ... ]

  /usr/bin/du
     SUNWcsu

  /usr/xpg4/bin/du
     SUNWxcu4

     The du utility writes to standard output  the  size  of  the
     file  space  allocated  to,  and  the size of the file space
     allocated to each subdirectory of, the file hierarchy rooted
     in  each of the specified files.  The size of the file space
     allocated to a file of type directory is defined as the  sum
     total  of space allocated to all files in the file hierarchy
     rooted in the directory plus  the  space  allocated  to  the
     directory itself.

     Files with multiple links will be counted  and  written  for
     only one entry.  The directory entry that is selected in the
     report is unspecified.  By default, file sizes  are  written
     in 512-byte units, rounded up to the next 512-byte unit.

  /usr/xpg4/bin/du
     When du cannot obtain file attributes  or  read  directories
     (see  stat(2)),  it  will  report an error condition and the
     final exit status will be affected.

     The following  options  are  supported  by  /usr/bin/du  and
     /usr/xpg4/bin/du:

     -a    In addition to the default output, report the size  of
          each  file  not of type directory in the file hierarchy
          rooted in the specified file.  Regardless of the  pres-
          ence  of  the  -a option, non-directories given as file
          operands will always be listed.

     -k    Write the files sizes in units of 1024  bytes,  rather
          than the default 512-byte units.

     -s    Instead of the default output, report only  the  total
          sum for each of the specified files.

  /usr/bin/du
     The following options are supported by /usr/bin/du only:
     -d    Do not cross filesystem boundaries. "du  -d  /"  would
          report usage only on the root partition, for example.

     -o    Do not add child  directories'  usage  to  a  parent's
          total.   Without  this  option,  the usage listed for a
          particular directory is the space taken by the files in
          that directory, as well as the files in all directories
          beneath it.  This option does nothing if -s is used.

     -r    Generate messages about  directories  that  cannot  be
          read, files that cannot be opened, and so forth, rather
          than being silent (the default).

  /usr/xpg4/bin/du
     The following  options  are  supported  by  /usr/xpg4/bin/du
     only:

     -r    By default, generate messages about  directories  that
          cannot  be  read,  files  that cannot be opened, and so
          forth.

     -x    When evaluating file sizes, evaluate only those  files
          that  have the same device as the file specified by the
          file operand.

     The following operand is supported:

     file    The path name of a file whose size is to be written.
             If  no  file  is specified, the current directory is
             used.

     The output from du consists of the amount of the space allo-
     cated to a file and the name of the file.

     See environ(5) for descriptions of the following environment
     variables  that  affect  the  execution  of  du:   LC_CTYPE,
     LC_MESSAGES, and NLSPATH.

     The following exit values are returned:

     0   Successful completion.

     >0  An error occurred.

     ls(1), stat(2), environ(5)


     System Administration Guide, Volume II

     A file with two or more links is  counted  only  once.   If,
     however,  there  are links between files in different direc-
     tories where the directories are on separate branches of the
     file  system  hierarchy, du will count the excess files more
     than once.

     Files containing holes will result  in  an  incorrect  block
     count.