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EuroTcl/OpenACS 11 - 12 JULY 2024, VIENNA


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NAME

sum - Calculate a sum(1) compatible checksum

Table Of Contents

SYNOPSIS

package require Tcl 8.5 9
package require sum ?1.1.3?

::crc::sum ?-bsd | -sysv? ?-format fmt? ?-chunksize size? [ -filename file | -channel chan | string ]

DESCRIPTION

This package provides a Tcl-only implementation of the sum(1) command which calculates a 16 bit checksum value from the input data. The BSD sum algorithm is used by default but the SysV algorithm is also available.

COMMANDS

OPTIONS

EXAMPLES

% crc::sum "Hello, World!"
37287

% crc::sum -format 0x%X "Hello, World!"
0x91A7

% crc::sum -file sum.tcl
13392

AUTHORS

Pat Thoyts

Bugs, Ideas, Feedback

This document, and the package it describes, will undoubtedly contain bugs and other problems. Please report such in the category crc of the Tcllib Trackers. Please also report any ideas for enhancements you may have for either package and/or documentation.

When proposing code changes, please provide unified diffs, i.e the output of diff -u.

Note further that attachments are strongly preferred over inlined patches. Attachments can be made by going to the Edit form of the ticket immediately after its creation, and then using the left-most button in the secondary navigation bar.

SEE ALSO

cksum(n), crc32(n), sum(1)

KEYWORDS

checksum, cksum, crc, crc32, cyclic redundancy check, data integrity, security, sum

CATEGORY

Hashes, checksums, and encryption

COPYRIGHT

Copyright © 2002, Pat Thoyts