Examples in Hurd Hacking Guide not working

[James Joseph]

Hi,
I have a Hurd H4 system, which i recently upgraded (using the long 
version of the instructions given by Marcus) to hurd-20020804.  
The system seemed to be working fine.  But when i use the included 
gcc-3.0 compiler to compile one of the first examples in The Hurd 
Hacking Guide, it does not execute as expected.  The function 
io_read(...) used to read the specified file into a buffer is 
reading zero bytes!  The program run fine BEFORE i did the 
upgrade.  I am including the source file dump.c as an attachment.  
Aren't these examples supposed to run on the upgraded system?  
Please help.
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dump.c
Description: Binary data