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<!-- Copyright (C) 2003 Red Hat, Inc.                                -->
<!-- This material may be distributed only subject to the terms      -->
<!-- and conditions set forth in the Open Publication License, v1.0  -->
<!-- or later (the latest version is presently available at          -->
<!-- http://www.opencontent.org/openpub/).                           -->
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<HTML
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>cksum</TITLE
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><HR
ALIGN="LEFT"
WIDTH="100%"></DIV
><H1
><A
NAME="CKSUM-COMMAND">cksum</H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN3155"
></A
><H2
>Name</H2
>cksum&nbsp;--&nbsp;Compute POSIX checksums</DIV
><DIV
CLASS="REFSYNOPSISDIV"
><A
NAME="AEN3158"><H2
>Synopsis</H2
><P
><B
CLASS="COMMAND"
>cksum</B
>  {-b <TT
CLASS="REPLACEABLE"
><I
>location</I
></TT
>} {-l <TT
CLASS="REPLACEABLE"
><I
>length</I
></TT
>}</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN3165"
></A
><H2
>Arguments</H2
><DIV
CLASS="INFORMALTABLE"
><A
NAME="AEN3167"><P
></P
><TABLE
BORDER="1"
CLASS="CALSTABLE"
><THEAD
><TR
><TH
WIDTH="25%"
ALIGN="LEFT"
VALIGN="TOP"
>Name</TH
><TH
WIDTH="25%"
ALIGN="LEFT"
VALIGN="TOP"
>Type</TH
><TH
WIDTH="25%"
ALIGN="LEFT"
VALIGN="TOP"
>Description</TH
><TH
WIDTH="25%"
ALIGN="LEFT"
VALIGN="TOP"
>Default</TH
></TR
></THEAD
><TBODY
><TR
><TD
WIDTH="25%"
ALIGN="LEFT"
VALIGN="TOP"
>-b <TT
CLASS="REPLACEABLE"
><I
>location</I
></TT
></TD
><TD
WIDTH="25%"
ALIGN="LEFT"
VALIGN="TOP"
>Memory address</TD
><TD
WIDTH="25%"
ALIGN="LEFT"
VALIGN="TOP"
>Location in memory for stat of data.</TD
><TD
WIDTH="25%"
ALIGN="LEFT"
VALIGN="TOP"
><SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>none</I
></SPAN
></TD
></TR
><TR
><TD
WIDTH="25%"
ALIGN="LEFT"
VALIGN="TOP"
>-l <TT
CLASS="REPLACEABLE"
><I
>length</I
></TT
></TD
><TD
WIDTH="25%"
ALIGN="LEFT"
VALIGN="TOP"
>Number</TD
><TD
WIDTH="25%"
ALIGN="LEFT"
VALIGN="TOP"
>Length of data</TD
><TD
WIDTH="25%"
ALIGN="LEFT"
VALIGN="TOP"
><SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>none</I
></SPAN
></TD
></TR
></TBODY
></TABLE
><P
></P
></DIV
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN3194"
></A
><H2
>Description</H2
><P
>Computes the POSIX checksum on a range of memory (either RAM or FLASH).
The values printed (decimal cksum, decimal length, hexadecimal cksum,
          hexadecimal length) can be compared with the output from the Linux program 'cksum'.</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN3197"
></A
><H2
>Examples</H2
><P
>Checksum a buffer.
<TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="SCREEN"
>
RedBoot&#62; <TT
CLASS="USERINPUT"
><B
>cksum -b 0x100000 -l 0x100</B
></TT
>
POSIX cksum = 3286483632 256 (0xc3e3c2b0 0x00000100)</PRE
></TD
></TR
></TABLE
>
      </P
><P
>Checksum an area of memory after loading a file. Note that the base
address and length parameters are provided by the preceding
load command.
<TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="SCREEN"
>
RedBoot&#62; <TT
CLASS="USERINPUT"
><B
>load -r -b %{FREEMEMLO} redboot.bin</B
></TT
>
Raw file loaded 0x06012800-0x0602f0a8
RedBoot&#62; <TT
CLASS="USERINPUT"
><B
>cksum</B
></TT
>
Computing cksum for area 0x06012800-0x0602f0a8
POSIX cksum = 2092197813 116904 (0x7cb467b5 0x0001c8a8)</PRE
></TD
></TR
></TABLE
>
      </P
></DIV
><DIV
CLASS="NAVFOOTER"
><HR
ALIGN="LEFT"
WIDTH="100%"><TABLE
SUMMARY="Footer navigation table"
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
><A
HREF="channel-command.html"
ACCESSKEY="P"
>Prev</A
></TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="ecos-ref.html"
ACCESSKEY="H"
>Home</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
><A
HREF="disks-command.html"
ACCESSKEY="N"
>Next</A
></TD
></TR
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
>channel</TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="common-commands.html"
ACCESSKEY="U"
>Up</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
>disks</TD
></TR
></TABLE
></DIV
></BODY
></HTML
>

Line No.	Rev	Author	Line
1	28	unneback	`<!-- Copyright (C) 2003 Red Hat, Inc. -->`
2			`<!-- This material may be distributed only subject to the terms -->`
3			`<!-- and conditions set forth in the Open Publication License, v1.0 -->`
4			`<!-- or later (the latest version is presently available at -->`
5			`<!-- http://www.opencontent.org/openpub/). -->`
6			`<!-- Distribution of the work or derivative of the work in any -->`
7			`<!-- standard (paper) book form is prohibited unless prior -->`
8			`<!-- permission is obtained from the copyright holder. -->`
9			`<HTML`
10			`><HEAD`
11			`><TITLE`
12			`>cksum</TITLE`
13			`><meta name="MSSmartTagsPreventParsing" content="TRUE">`
14			`<META`
15			`NAME="GENERATOR"`
16			`CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+`
17			`"><LINK`
18			`REL="HOME"`
19			`TITLE="eCos Reference Manual"`
20			`HREF="ecos-ref.html"><LINK`
21			`REL="UP"`
22			`TITLE="Common Commands"`
23			`HREF="common-commands.html"><LINK`
24			`REL="PREVIOUS"`
25			`TITLE="channel"`
26			`HREF="channel-command.html"><LINK`
27			`REL="NEXT"`
28			`TITLE="disks"`
29			`HREF="disks-command.html"></HEAD`
30			`><BODY`
31			`CLASS="REFENTRY"`
32			`BGCOLOR="#FFFFFF"`
33			`TEXT="#000000"`
34			`LINK="#0000FF"`
35			`VLINK="#840084"`
36			`ALINK="#0000FF"`
37			`><DIV`
38			`CLASS="NAVHEADER"`
39			`><TABLE`
40			`SUMMARY="Header navigation table"`
41			`WIDTH="100%"`
42			`BORDER="0"`
43			`CELLPADDING="0"`
44			`CELLSPACING="0"`
45			`><TR`
46			`><TH`
47			`COLSPAN="3"`
48			`ALIGN="center"`
49			`>eCos Reference Manual</TH`
50			`></TR`
51			`><TR`
52			`><TD`
53			`WIDTH="10%"`
54			`ALIGN="left"`
55			`VALIGN="bottom"`
56			`><A`
57			`HREF="channel-command.html"`
58			`ACCESSKEY="P"`
59			`>Prev</A`
60			`></TD`
61			`><TD`
62			`WIDTH="80%"`
63			`ALIGN="center"`
64			`VALIGN="bottom"`
65			`></TD`
66			`><TD`
67			`WIDTH="10%"`
68			`ALIGN="right"`
69			`VALIGN="bottom"`
70			`><A`
71			`HREF="disks-command.html"`
72			`ACCESSKEY="N"`
73			`>Next</A`
74			`></TD`
75			`></TR`
76			`></TABLE`
77			`><HR`
78			`ALIGN="LEFT"`
79			`WIDTH="100%"></DIV`
80			`><H1`
81			`><A`
82			`NAME="CKSUM-COMMAND">cksum</H1`
83			`><DIV`
84			`CLASS="REFNAMEDIV"`
85			`><A`
86			`NAME="AEN3155"`
87			`></A`
88			`><H2`
89			`>Name</H2`
90			`>cksum -- Compute POSIX checksums</DIV`
91			`><DIV`
92			`CLASS="REFSYNOPSISDIV"`
93			`><A`
94			`NAME="AEN3158"><H2`
95			`>Synopsis</H2`
96			`><P`
97			`><B`
98			`CLASS="COMMAND"`
99			`>cksum</B`
100			`> {-b <TT`
101			`CLASS="REPLACEABLE"`
102			`><I`
103			`>location</I`
104			`></TT`
105			`>} {-l <TT`
106			`CLASS="REPLACEABLE"`
107			`><I`
108			`>length</I`
109			`></TT`
110			`>}</P`
111			`></DIV`
112			`><DIV`
113			`CLASS="REFSECT1"`
114			`><A`
115			`NAME="AEN3165"`
116			`></A`
117			`><H2`
118			`>Arguments</H2`
119			`><DIV`
120			`CLASS="INFORMALTABLE"`
121			`><A`
122			`NAME="AEN3167"><P`
123			`></P`
124			`><TABLE`
125			`BORDER="1"`
126			`CLASS="CALSTABLE"`
127			`><THEAD`
128			`><TR`
129			`><TH`
130			`WIDTH="25%"`
131			`ALIGN="LEFT"`
132			`VALIGN="TOP"`
133			`>Name</TH`
134			`><TH`
135			`WIDTH="25%"`
136			`ALIGN="LEFT"`
137			`VALIGN="TOP"`
138			`>Type</TH`
139			`><TH`
140			`WIDTH="25%"`
141			`ALIGN="LEFT"`
142			`VALIGN="TOP"`
143			`>Description</TH`
144			`><TH`
145			`WIDTH="25%"`
146			`ALIGN="LEFT"`
147			`VALIGN="TOP"`
148			`>Default</TH`
149			`></TR`
150			`></THEAD`
151			`><TBODY`
152			`><TR`
153			`><TD`
154			`WIDTH="25%"`
155			`ALIGN="LEFT"`
156			`VALIGN="TOP"`
157			`>-b <TT`
158			`CLASS="REPLACEABLE"`
159			`><I`
160			`>location</I`
161			`></TT`
162			`></TD`
163			`><TD`
164			`WIDTH="25%"`
165			`ALIGN="LEFT"`
166			`VALIGN="TOP"`
167			`>Memory address</TD`
168			`><TD`
169			`WIDTH="25%"`
170			`ALIGN="LEFT"`
171			`VALIGN="TOP"`
172			`>Location in memory for stat of data.</TD`
173			`><TD`
174			`WIDTH="25%"`
175			`ALIGN="LEFT"`
176			`VALIGN="TOP"`
177			`><SPAN`
178			`CLASS="emphasis"`
179			`><I`
180			`CLASS="EMPHASIS"`
181			`>none</I`
182			`></SPAN`
183			`></TD`
184			`></TR`
185			`><TR`
186			`><TD`
187			`WIDTH="25%"`
188			`ALIGN="LEFT"`
189			`VALIGN="TOP"`
190			`>-l <TT`
191			`CLASS="REPLACEABLE"`
192			`><I`
193			`>length</I`
194			`></TT`
195			`></TD`
196			`><TD`
197			`WIDTH="25%"`
198			`ALIGN="LEFT"`
199			`VALIGN="TOP"`
200			`>Number</TD`
201			`><TD`
202			`WIDTH="25%"`
203			`ALIGN="LEFT"`
204			`VALIGN="TOP"`
205			`>Length of data</TD`
206			`><TD`
207			`WIDTH="25%"`
208			`ALIGN="LEFT"`
209			`VALIGN="TOP"`
210			`><SPAN`
211			`CLASS="emphasis"`
212			`><I`
213			`CLASS="EMPHASIS"`
214			`>none</I`
215			`></SPAN`
216			`></TD`
217			`></TR`
218			`></TBODY`
219			`></TABLE`
220			`><P`
221			`></P`
222			`></DIV`
223			`></DIV`
224			`><DIV`
225			`CLASS="REFSECT1"`
226			`><A`
227			`NAME="AEN3194"`
228			`></A`
229			`><H2`
230			`>Description</H2`
231			`><P`
232			`>Computes the POSIX checksum on a range of memory (either RAM or FLASH).`
233			`The values printed (decimal cksum, decimal length, hexadecimal cksum,`
234			`hexadecimal length) can be compared with the output from the Linux program 'cksum'.</P`
235			`></DIV`
236			`><DIV`
237			`CLASS="REFSECT1"`
238			`><A`
239			`NAME="AEN3197"`
240			`></A`
241			`><H2`
242			`>Examples</H2`
243			`><P`
244			`>Checksum a buffer.`
245			`<TABLE`
246			`BORDER="5"`
247			`BGCOLOR="#E0E0F0"`
248			`WIDTH="70%"`
249			`><TR`
250			`><TD`
251			`><PRE`
252			`CLASS="SCREEN"`
253			`>`
254			`RedBoot> <TT`
255			`CLASS="USERINPUT"`
256			`><B`
257			`>cksum -b 0x100000 -l 0x100</B`
258			`></TT`
259			`>`
260			`POSIX cksum = 3286483632 256 (0xc3e3c2b0 0x00000100)</PRE`
261			`></TD`
262			`></TR`
263			`></TABLE`
264			`>`
265			`</P`
266			`><P`
267			`>Checksum an area of memory after loading a file. Note that the base`
268			`address and length parameters are provided by the preceding`
269			`load command.`
270			`<TABLE`
271			`BORDER="5"`
272			`BGCOLOR="#E0E0F0"`
273			`WIDTH="70%"`
274			`><TR`
275			`><TD`
276			`><PRE`
277			`CLASS="SCREEN"`
278			`>`
279			`RedBoot> <TT`
280			`CLASS="USERINPUT"`
281			`><B`
282			`>load -r -b %{FREEMEMLO} redboot.bin</B`
283			`></TT`
284			`>`
285			`Raw file loaded 0x06012800-0x0602f0a8`
286			`RedBoot> <TT`
287			`CLASS="USERINPUT"`
288			`><B`
289			`>cksum</B`
290			`></TT`
291			`>`
292			`Computing cksum for area 0x06012800-0x0602f0a8`
293			`POSIX cksum = 2092197813 116904 (0x7cb467b5 0x0001c8a8)</PRE`
294			`></TD`
295			`></TR`
296			`></TABLE`
297			`>`
298			`</P`
299			`></DIV`
300			`><DIV`
301			`CLASS="NAVFOOTER"`
302			`><HR`
303			`ALIGN="LEFT"`
304			`WIDTH="100%"><TABLE`
305			`SUMMARY="Footer navigation table"`
306			`WIDTH="100%"`
307			`BORDER="0"`
308			`CELLPADDING="0"`
309			`CELLSPACING="0"`
310			`><TR`
311			`><TD`
312			`WIDTH="33%"`
313			`ALIGN="left"`
314			`VALIGN="top"`
315			`><A`
316			`HREF="channel-command.html"`
317			`ACCESSKEY="P"`
318			`>Prev</A`
319			`></TD`
320			`><TD`
321			`WIDTH="34%"`
322			`ALIGN="center"`
323			`VALIGN="top"`
324			`><A`
325			`HREF="ecos-ref.html"`
326			`ACCESSKEY="H"`
327			`>Home</A`
328			`></TD`
329			`><TD`
330			`WIDTH="33%"`
331			`ALIGN="right"`
332			`VALIGN="top"`
333			`><A`
334			`HREF="disks-command.html"`
335			`ACCESSKEY="N"`
336			`>Next</A`
337			`></TD`
338			`></TR`
339			`><TR`
340			`><TD`
341			`WIDTH="33%"`
342			`ALIGN="left"`
343			`VALIGN="top"`
344			`>channel</TD`
345			`><TD`
346			`WIDTH="34%"`
347			`ALIGN="center"`
348			`VALIGN="top"`
349			`><A`
350			`HREF="common-commands.html"`
351			`ACCESSKEY="U"`
352			`>Up</A`
353			`></TD`
354			`><TD`
355			`WIDTH="33%"`
356			`ALIGN="right"`
357			`VALIGN="top"`
358			`>disks</TD`
359			`></TR`
360			`></TABLE`
361			`></DIV`
362			`></BODY`
363			`></HTML`
364			`>`

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