solaris - sum (1)

NAME

     sum - print checksum and block count for a file

SYNOPSIS

     sum [-r] [file...]

AVAILABILITY

     SUNWesu

DESCRIPTION

     The sum utility calculates and prints a 16-bit checksum  for
     the  named  file,  and  also  prints  the number of 512-byte
     blocks in the file.  It is typically used to  look  for  bad
     spots,   or  to  validate  a  file  communicated  over  some
     transmission line.

OPTIONS

     The following options are supported:

     -r    Use an alternate (machine-dependent) algorithm in com-
          puting the checksum.

OPERANDS

     The following operands are supported:

     file A path name of a file.  If  no  files  are  named,  the
          standard input is used.

ENVIRONMENT

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

EXIT STATUS

     The following exit values are returned.

     0   Successful completion.

     >0  An error occurred.

SEE ALSO

     cksum(1), wc(1), environ(5)

DIAGNOSTICS

     "Read error" is indistinguishable from end of file  on  most
     devices; check the block count.

NOTES

     Portable applications should use cksum(1).