[U-Boot-Users] autoscr can't execute script in u-boot 1.2.0

[Wolfgang Denk]

In message <200709261025129335711 at 163.com> you wrote:
>
> I have tested the autoscr command and found that autoscr can't execute script in u-boot 1.2.0. 
> The steps follow here:
> 1. Generate autos.img
> 	1) echo "printenv serverip" >>test.txt

Note that you *append* to "test.txt" here, so you probably already
have garbage in that file... ?

> 	2) mkimage
> [frisky at FC6 test]$ mkimage -A ppc -O linux -T script -C none -a 0 -e 0  -n "auto script example"  -d test.txt autos.img && rm -rf /tftpboot/coreblade/autos.img &&  cp autos.img /tftpboot/coreblade/ 
> Image Name:   auto script example
> Created:      Wed Sep 26 10:17:46 2007
> Image Type:   PowerPC Linux Script (uncompressed)
> Data Size:    27 Bytes = 0.03 kB = 0.00 MB
> Load Address: 0x00000000
> Entry Point:  0x00000000
> Contents:
>    Image 0:       19 Bytes =    0 kB = 0 MB

This looks wrong to me.

If you execute the commands above with an empty/nonexisting file
"test.txt", the result should be:

-> ls -l test.txt
-rw-rw-r-- 1 wd wd 18 Sep 26 08:44 test.txt

i.e. the file should be 18 bytes, not 19 as in your case.

It seems you already had one byte of garbage in "test.txt"

> 	3) Run it!!
> coreblade => autoscr 200000
> ## Executing script at 00200000
> " not definedrverip
> 
> 	4) But I can see the serverip defined.
> coreblade => printe serverip
> serverip=10.3.8.66 
> 
> I don't know what's the problem.  Could you please help me? Thank you very much!

This works fine for me:

=> md 200000
00200000: 27051956 321bc087 46f9ffe1 0000001a    '..V2...F.......
00200010: 00000000 00000000 e68800bd 05070600    ................
00200020: 6175746f 20736372 69707420 6578616d    auto script exam
00200030: 706c6500 00000000 00000000 00000000    ple.............
00200040: 00000012 00000000 7072696e 74656e76    ........printenv
00200050: 20736572 76657269 700a0000 00000000     serverip.......
00200060: 00000000 00000000 00000000 00000000    ................
00200070: 00000000 00000000 00000000 00000000    ................
00200080: 00000000 00000000 00000000 00000000    ................
...
=> imi 200000

## Checking Image at 00200000 ...
   Image Name:   auto script example
   Image Type:   PowerPC Linux Script (uncompressed)
   Data Size:    26 Bytes =  0 kB
   Load Address: 00000000
   Entry Point:  00000000
   Verifying Checksum ... OK
=> autoscr 200000
## Executing script at 00200000
serverip=192.168.1.1
=>

I thing what you see is a GIGO effect (garbage in, garbage out)...

Best regards,

Wolfgang Denk

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