From: "Steven R." <steverummel@...>
Date: 2006-07-16T22:25:06+09:00
Subject: Re: Newbie question on an I/O loop

Jay Daniels wrote:
> I got a question that's puzzling me. Am new to Ruby but programming for 
> decades. Here's the problem. This apparently simple loop reads 396 bytes 
> of a file and no more. The actual file is 1.5KB and I can display it 
> easily in a hex dumper. The bytes Ruby has read are all correct. It just 
> seems to stop after 396 bytes. Any idea what's wrong or where I should 
> be looking?
> 
> Many thanks in advance,
> 
> JK Daniels
> 
>>>> code >>>
> 
> if ARGV[0] == nil
>     puts( "\n" + $help )
> else
>     i = 0
>     tfm = File.open( ARGV[0] )
>     tfm.each_byte{ |c| i = i + 1; printf( "%d: %X\n", i, c ) }
>     if tfm.eof
>         puts "at eof" else puts "not at eof"
>     end
> end
> 
> <<< end code <<<
> 
> This outputs the first 396 bytes and then state it's at EOF. If it makes 
> any difference, the last three bytes it reads are (all hex): C0 A4 00 
> and the next three (unread) bytes in the file are: 1A C0 B5
> 

I tested this on a file that was 29,184 bytes - it worked fine.

Could it be something in your data or environment?

Sorry I couldn't be of more help.