<!-- Copyright (C) 2003 Red Hat, Inc. -->
|
<!-- Copyright (C) 2003 Red Hat, Inc. -->
|
<!-- This material may be distributed only subject to the terms -->
|
<!-- This material may be distributed only subject to the terms -->
|
<!-- and conditions set forth in the Open Publication License, v1.0 -->
|
<!-- and conditions set forth in the Open Publication License, v1.0 -->
|
<!-- or later (the latest version is presently available at -->
|
<!-- or later (the latest version is presently available at -->
|
<!-- http://www.opencontent.org/openpub/). -->
|
<!-- http://www.opencontent.org/openpub/). -->
|
<!-- Distribution of the work or derivative of the work in any -->
|
<!-- Distribution of the work or derivative of the work in any -->
|
<!-- standard (paper) book form is prohibited unless prior -->
|
<!-- standard (paper) book form is prohibited unless prior -->
|
<!-- permission is obtained from the copyright holder. -->
|
<!-- permission is obtained from the copyright holder. -->
|
<HTML
|
<HTML
|
><HEAD
|
><HEAD
|
><TITLE
|
><TITLE
|
>cksum</TITLE
|
>cksum</TITLE
|
><meta name="MSSmartTagsPreventParsing" content="TRUE">
|
><meta name="MSSmartTagsPreventParsing" content="TRUE">
|
<META
|
<META
|
NAME="GENERATOR"
|
NAME="GENERATOR"
|
CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+
|
CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+
|
"><LINK
|
"><LINK
|
REL="HOME"
|
REL="HOME"
|
TITLE="eCos Reference Manual"
|
TITLE="eCos Reference Manual"
|
HREF="ecos-ref.html"><LINK
|
HREF="ecos-ref.html"><LINK
|
REL="UP"
|
REL="UP"
|
TITLE="Common Commands"
|
TITLE="Common Commands"
|
HREF="common-commands.html"><LINK
|
HREF="common-commands.html"><LINK
|
REL="PREVIOUS"
|
REL="PREVIOUS"
|
TITLE="channel"
|
TITLE="channel"
|
HREF="channel-command.html"><LINK
|
HREF="channel-command.html"><LINK
|
REL="NEXT"
|
REL="NEXT"
|
TITLE="disks"
|
TITLE="disks"
|
HREF="disks-command.html"></HEAD
|
HREF="disks-command.html"></HEAD
|
><BODY
|
><BODY
|
CLASS="REFENTRY"
|
CLASS="REFENTRY"
|
BGCOLOR="#FFFFFF"
|
BGCOLOR="#FFFFFF"
|
TEXT="#000000"
|
TEXT="#000000"
|
LINK="#0000FF"
|
LINK="#0000FF"
|
VLINK="#840084"
|
VLINK="#840084"
|
ALINK="#0000FF"
|
ALINK="#0000FF"
|
><DIV
|
><DIV
|
CLASS="NAVHEADER"
|
CLASS="NAVHEADER"
|
><TABLE
|
><TABLE
|
SUMMARY="Header navigation table"
|
SUMMARY="Header navigation table"
|
WIDTH="100%"
|
WIDTH="100%"
|
BORDER="0"
|
BORDER="0"
|
CELLPADDING="0"
|
CELLPADDING="0"
|
CELLSPACING="0"
|
CELLSPACING="0"
|
><TR
|
><TR
|
><TH
|
><TH
|
COLSPAN="3"
|
COLSPAN="3"
|
ALIGN="center"
|
ALIGN="center"
|
>eCos Reference Manual</TH
|
>eCos Reference Manual</TH
|
></TR
|
></TR
|
><TR
|
><TR
|
><TD
|
><TD
|
WIDTH="10%"
|
WIDTH="10%"
|
ALIGN="left"
|
ALIGN="left"
|
VALIGN="bottom"
|
VALIGN="bottom"
|
><A
|
><A
|
HREF="channel-command.html"
|
HREF="channel-command.html"
|
ACCESSKEY="P"
|
ACCESSKEY="P"
|
>Prev</A
|
>Prev</A
|
></TD
|
></TD
|
><TD
|
><TD
|
WIDTH="80%"
|
WIDTH="80%"
|
ALIGN="center"
|
ALIGN="center"
|
VALIGN="bottom"
|
VALIGN="bottom"
|
></TD
|
></TD
|
><TD
|
><TD
|
WIDTH="10%"
|
WIDTH="10%"
|
ALIGN="right"
|
ALIGN="right"
|
VALIGN="bottom"
|
VALIGN="bottom"
|
><A
|
><A
|
HREF="disks-command.html"
|
HREF="disks-command.html"
|
ACCESSKEY="N"
|
ACCESSKEY="N"
|
>Next</A
|
>Next</A
|
></TD
|
></TD
|
></TR
|
></TR
|
></TABLE
|
></TABLE
|
><HR
|
><HR
|
ALIGN="LEFT"
|
ALIGN="LEFT"
|
WIDTH="100%"></DIV
|
WIDTH="100%"></DIV
|
><H1
|
><H1
|
><A
|
><A
|
NAME="CKSUM-COMMAND">cksum</H1
|
NAME="CKSUM-COMMAND">cksum</H1
|
><DIV
|
><DIV
|
CLASS="REFNAMEDIV"
|
CLASS="REFNAMEDIV"
|
><A
|
><A
|
NAME="AEN3155"
|
NAME="AEN3155"
|
></A
|
></A
|
><H2
|
><H2
|
>Name</H2
|
>Name</H2
|
>cksum -- Compute POSIX checksums</DIV
|
>cksum -- Compute POSIX checksums</DIV
|
><DIV
|
><DIV
|
CLASS="REFSYNOPSISDIV"
|
CLASS="REFSYNOPSISDIV"
|
><A
|
><A
|
NAME="AEN3158"><H2
|
NAME="AEN3158"><H2
|
>Synopsis</H2
|
>Synopsis</H2
|
><P
|
><P
|
><B
|
><B
|
CLASS="COMMAND"
|
CLASS="COMMAND"
|
>cksum</B
|
>cksum</B
|
> {-b <TT
|
> {-b <TT
|
CLASS="REPLACEABLE"
|
CLASS="REPLACEABLE"
|
><I
|
><I
|
>location</I
|
>location</I
|
></TT
|
></TT
|
>} {-l <TT
|
>} {-l <TT
|
CLASS="REPLACEABLE"
|
CLASS="REPLACEABLE"
|
><I
|
><I
|
>length</I
|
>length</I
|
></TT
|
></TT
|
>}</P
|
>}</P
|
></DIV
|
></DIV
|
><DIV
|
><DIV
|
CLASS="REFSECT1"
|
CLASS="REFSECT1"
|
><A
|
><A
|
NAME="AEN3165"
|
NAME="AEN3165"
|
></A
|
></A
|
><H2
|
><H2
|
>Arguments</H2
|
>Arguments</H2
|
><DIV
|
><DIV
|
CLASS="INFORMALTABLE"
|
CLASS="INFORMALTABLE"
|
><A
|
><A
|
NAME="AEN3167"><P
|
NAME="AEN3167"><P
|
></P
|
></P
|
><TABLE
|
><TABLE
|
BORDER="1"
|
BORDER="1"
|
CLASS="CALSTABLE"
|
CLASS="CALSTABLE"
|
><THEAD
|
><THEAD
|
><TR
|
><TR
|
><TH
|
><TH
|
WIDTH="25%"
|
WIDTH="25%"
|
ALIGN="LEFT"
|
ALIGN="LEFT"
|
VALIGN="TOP"
|
VALIGN="TOP"
|
>Name</TH
|
>Name</TH
|
><TH
|
><TH
|
WIDTH="25%"
|
WIDTH="25%"
|
ALIGN="LEFT"
|
ALIGN="LEFT"
|
VALIGN="TOP"
|
VALIGN="TOP"
|
>Type</TH
|
>Type</TH
|
><TH
|
><TH
|
WIDTH="25%"
|
WIDTH="25%"
|
ALIGN="LEFT"
|
ALIGN="LEFT"
|
VALIGN="TOP"
|
VALIGN="TOP"
|
>Description</TH
|
>Description</TH
|
><TH
|
><TH
|
WIDTH="25%"
|
WIDTH="25%"
|
ALIGN="LEFT"
|
ALIGN="LEFT"
|
VALIGN="TOP"
|
VALIGN="TOP"
|
>Default</TH
|
>Default</TH
|
></TR
|
></TR
|
></THEAD
|
></THEAD
|
><TBODY
|
><TBODY
|
><TR
|
><TR
|
><TD
|
><TD
|
WIDTH="25%"
|
WIDTH="25%"
|
ALIGN="LEFT"
|
ALIGN="LEFT"
|
VALIGN="TOP"
|
VALIGN="TOP"
|
>-b <TT
|
>-b <TT
|
CLASS="REPLACEABLE"
|
CLASS="REPLACEABLE"
|
><I
|
><I
|
>location</I
|
>location</I
|
></TT
|
></TT
|
></TD
|
></TD
|
><TD
|
><TD
|
WIDTH="25%"
|
WIDTH="25%"
|
ALIGN="LEFT"
|
ALIGN="LEFT"
|
VALIGN="TOP"
|
VALIGN="TOP"
|
>Memory address</TD
|
>Memory address</TD
|
><TD
|
><TD
|
WIDTH="25%"
|
WIDTH="25%"
|
ALIGN="LEFT"
|
ALIGN="LEFT"
|
VALIGN="TOP"
|
VALIGN="TOP"
|
>Location in memory for stat of data.</TD
|
>Location in memory for stat of data.</TD
|
><TD
|
><TD
|
WIDTH="25%"
|
WIDTH="25%"
|
ALIGN="LEFT"
|
ALIGN="LEFT"
|
VALIGN="TOP"
|
VALIGN="TOP"
|
><SPAN
|
><SPAN
|
CLASS="emphasis"
|
CLASS="emphasis"
|
><I
|
><I
|
CLASS="EMPHASIS"
|
CLASS="EMPHASIS"
|
>none</I
|
>none</I
|
></SPAN
|
></SPAN
|
></TD
|
></TD
|
></TR
|
></TR
|
><TR
|
><TR
|
><TD
|
><TD
|
WIDTH="25%"
|
WIDTH="25%"
|
ALIGN="LEFT"
|
ALIGN="LEFT"
|
VALIGN="TOP"
|
VALIGN="TOP"
|
>-l <TT
|
>-l <TT
|
CLASS="REPLACEABLE"
|
CLASS="REPLACEABLE"
|
><I
|
><I
|
>length</I
|
>length</I
|
></TT
|
></TT
|
></TD
|
></TD
|
><TD
|
><TD
|
WIDTH="25%"
|
WIDTH="25%"
|
ALIGN="LEFT"
|
ALIGN="LEFT"
|
VALIGN="TOP"
|
VALIGN="TOP"
|
>Number</TD
|
>Number</TD
|
><TD
|
><TD
|
WIDTH="25%"
|
WIDTH="25%"
|
ALIGN="LEFT"
|
ALIGN="LEFT"
|
VALIGN="TOP"
|
VALIGN="TOP"
|
>Length of data</TD
|
>Length of data</TD
|
><TD
|
><TD
|
WIDTH="25%"
|
WIDTH="25%"
|
ALIGN="LEFT"
|
ALIGN="LEFT"
|
VALIGN="TOP"
|
VALIGN="TOP"
|
><SPAN
|
><SPAN
|
CLASS="emphasis"
|
CLASS="emphasis"
|
><I
|
><I
|
CLASS="EMPHASIS"
|
CLASS="EMPHASIS"
|
>none</I
|
>none</I
|
></SPAN
|
></SPAN
|
></TD
|
></TD
|
></TR
|
></TR
|
></TBODY
|
></TBODY
|
></TABLE
|
></TABLE
|
><P
|
><P
|
></P
|
></P
|
></DIV
|
></DIV
|
></DIV
|
></DIV
|
><DIV
|
><DIV
|
CLASS="REFSECT1"
|
CLASS="REFSECT1"
|
><A
|
><A
|
NAME="AEN3194"
|
NAME="AEN3194"
|
></A
|
></A
|
><H2
|
><H2
|
>Description</H2
|
>Description</H2
|
><P
|
><P
|
>Computes the POSIX checksum on a range of memory (either RAM or FLASH).
|
>Computes the POSIX checksum on a range of memory (either RAM or FLASH).
|
The values printed (decimal cksum, decimal length, hexadecimal cksum,
|
The values printed (decimal cksum, decimal length, hexadecimal cksum,
|
hexadecimal length) can be compared with the output from the Linux program 'cksum'.</P
|
hexadecimal length) can be compared with the output from the Linux program 'cksum'.</P
|
></DIV
|
></DIV
|
><DIV
|
><DIV
|
CLASS="REFSECT1"
|
CLASS="REFSECT1"
|
><A
|
><A
|
NAME="AEN3197"
|
NAME="AEN3197"
|
></A
|
></A
|
><H2
|
><H2
|
>Examples</H2
|
>Examples</H2
|
><P
|
><P
|
>Checksum a buffer.
|
>Checksum a buffer.
|
<TABLE
|
<TABLE
|
BORDER="5"
|
BORDER="5"
|
BGCOLOR="#E0E0F0"
|
BGCOLOR="#E0E0F0"
|
WIDTH="70%"
|
WIDTH="70%"
|
><TR
|
><TR
|
><TD
|
><TD
|
><PRE
|
><PRE
|
CLASS="SCREEN"
|
CLASS="SCREEN"
|
>
|
>
|
RedBoot> <TT
|
RedBoot> <TT
|
CLASS="USERINPUT"
|
CLASS="USERINPUT"
|
><B
|
><B
|
>cksum -b 0x100000 -l 0x100</B
|
>cksum -b 0x100000 -l 0x100</B
|
></TT
|
></TT
|
>
|
>
|
POSIX cksum = 3286483632 256 (0xc3e3c2b0 0x00000100)</PRE
|
POSIX cksum = 3286483632 256 (0xc3e3c2b0 0x00000100)</PRE
|
></TD
|
></TD
|
></TR
|
></TR
|
></TABLE
|
></TABLE
|
>
|
>
|
</P
|
</P
|
><P
|
><P
|
>Checksum an area of memory after loading a file. Note that the base
|
>Checksum an area of memory after loading a file. Note that the base
|
address and length parameters are provided by the preceding
|
address and length parameters are provided by the preceding
|
load command.
|
load command.
|
<TABLE
|
<TABLE
|
BORDER="5"
|
BORDER="5"
|
BGCOLOR="#E0E0F0"
|
BGCOLOR="#E0E0F0"
|
WIDTH="70%"
|
WIDTH="70%"
|
><TR
|
><TR
|
><TD
|
><TD
|
><PRE
|
><PRE
|
CLASS="SCREEN"
|
CLASS="SCREEN"
|
>
|
>
|
RedBoot> <TT
|
RedBoot> <TT
|
CLASS="USERINPUT"
|
CLASS="USERINPUT"
|
><B
|
><B
|
>load -r -b %{FREEMEMLO} redboot.bin</B
|
>load -r -b %{FREEMEMLO} redboot.bin</B
|
></TT
|
></TT
|
>
|
>
|
Raw file loaded 0x06012800-0x0602f0a8
|
Raw file loaded 0x06012800-0x0602f0a8
|
RedBoot> <TT
|
RedBoot> <TT
|
CLASS="USERINPUT"
|
CLASS="USERINPUT"
|
><B
|
><B
|
>cksum</B
|
>cksum</B
|
></TT
|
></TT
|
>
|
>
|
Computing cksum for area 0x06012800-0x0602f0a8
|
Computing cksum for area 0x06012800-0x0602f0a8
|
POSIX cksum = 2092197813 116904 (0x7cb467b5 0x0001c8a8)</PRE
|
POSIX cksum = 2092197813 116904 (0x7cb467b5 0x0001c8a8)</PRE
|
></TD
|
></TD
|
></TR
|
></TR
|
></TABLE
|
></TABLE
|
>
|
>
|
</P
|
</P
|
></DIV
|
></DIV
|
><DIV
|
><DIV
|
CLASS="NAVFOOTER"
|
CLASS="NAVFOOTER"
|
><HR
|
><HR
|
ALIGN="LEFT"
|
ALIGN="LEFT"
|
WIDTH="100%"><TABLE
|
WIDTH="100%"><TABLE
|
SUMMARY="Footer navigation table"
|
SUMMARY="Footer navigation table"
|
WIDTH="100%"
|
WIDTH="100%"
|
BORDER="0"
|
BORDER="0"
|
CELLPADDING="0"
|
CELLPADDING="0"
|
CELLSPACING="0"
|
CELLSPACING="0"
|
><TR
|
><TR
|
><TD
|
><TD
|
WIDTH="33%"
|
WIDTH="33%"
|
ALIGN="left"
|
ALIGN="left"
|
VALIGN="top"
|
VALIGN="top"
|
><A
|
><A
|
HREF="channel-command.html"
|
HREF="channel-command.html"
|
ACCESSKEY="P"
|
ACCESSKEY="P"
|
>Prev</A
|
>Prev</A
|
></TD
|
></TD
|
><TD
|
><TD
|
WIDTH="34%"
|
WIDTH="34%"
|
ALIGN="center"
|
ALIGN="center"
|
VALIGN="top"
|
VALIGN="top"
|
><A
|
><A
|
HREF="ecos-ref.html"
|
HREF="ecos-ref.html"
|
ACCESSKEY="H"
|
ACCESSKEY="H"
|
>Home</A
|
>Home</A
|
></TD
|
></TD
|
><TD
|
><TD
|
WIDTH="33%"
|
WIDTH="33%"
|
ALIGN="right"
|
ALIGN="right"
|
VALIGN="top"
|
VALIGN="top"
|
><A
|
><A
|
HREF="disks-command.html"
|
HREF="disks-command.html"
|
ACCESSKEY="N"
|
ACCESSKEY="N"
|
>Next</A
|
>Next</A
|
></TD
|
></TD
|
></TR
|
></TR
|
><TR
|
><TR
|
><TD
|
><TD
|
WIDTH="33%"
|
WIDTH="33%"
|
ALIGN="left"
|
ALIGN="left"
|
VALIGN="top"
|
VALIGN="top"
|
>channel</TD
|
>channel</TD
|
><TD
|
><TD
|
WIDTH="34%"
|
WIDTH="34%"
|
ALIGN="center"
|
ALIGN="center"
|
VALIGN="top"
|
VALIGN="top"
|
><A
|
><A
|
HREF="common-commands.html"
|
HREF="common-commands.html"
|
ACCESSKEY="U"
|
ACCESSKEY="U"
|
>Up</A
|
>Up</A
|
></TD
|
></TD
|
><TD
|
><TD
|
WIDTH="33%"
|
WIDTH="33%"
|
ALIGN="right"
|
ALIGN="right"
|
VALIGN="top"
|
VALIGN="top"
|
>disks</TD
|
>disks</TD
|
></TR
|
></TR
|
></TABLE
|
></TABLE
|
></DIV
|
></DIV
|
></BODY
|
></BODY
|
></HTML
|
></HTML
|
|
|
