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Full Discussion: Binary line being inserted while truncating a file
Top Forums UNIX for Dummies Questions & Answers Binary line being inserted while truncating a file Post 302353261 by pludi on Tuesday 15th of September 2009 02:56:58 AM
Old 09-15-2009
You've got to give us some more information on how you truncate the file, what kind of link you use, and what and how another application might write into that file, because I can't yet reproduce that behaviour:
Code:
bash-3.2$ perl -e 'for($i=0;$i<100;$i++){print chr(ord('A')+$i%26)x40,"\n";}' > test1.txt
bash-3.2$ ln -s test1.txt test2.txt
bash-3.2$ ln test1.txt test3.txt
bash-3.2$ ll test*.txt
-rw-r--r-- 2 pludi users 4100 15. Sep 08:53 test1.txt
lrwxrwxrwx 1 pludi users    9 15. Sep 08:53 test2.txt -> test1.txt
-rw-r--r-- 2 pludi users 4100 15. Sep 08:53 test3.txt
bash-3.2$ head test1.txt
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB
CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD
EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE
FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG
HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII
JJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJ
bash-3.2$ head test2.txt
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB
CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD
EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE
FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG
HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII
JJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJ
bash-3.2$ head test3.txt
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB
CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD
EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE
FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG
HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII
JJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJ
bash-3.2$ : > test1.txt
bash-3.2$ head test1.txt
bash-3.2$ head test2.txt
bash-3.2$ head test3.txt
bash-3.2$ ll test*.txt
-rw-r--r-- 2 pludi users 0 15. Sep 08:54 test1.txt
lrwxrwxrwx 1 pludi users 9 15. Sep 08:53 test2.txt -> test1.txt
-rw-r--r-- 2 pludi users 0 15. Sep 08:54 test3.txt

 

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LEARN ABOUT DEBIAN

binary.getblockchunk

Binary.getBlockChunk(3kaya)				       Kaya module reference				       Binary.getBlockChunk(3kaya)

NAME

       Binary::getBlockChunk - Return a chunk from a block as an array.

SYNOPSIS

       [Int] getBlockChunk( Binary block, Int offset, Int bsize )

ARGUMENTS

       block The binary block

       offset The offset to start at (zero-indexed)

       bsize The length of chunk to read

DESCRIPTION

       Return  a  chunk from a block as an array. Throws an Binary.OffsetOutOfRange(3kaya) Exception if it attempts to access a value outside the
       block.

AUTHORS

       Kaya standard library by Edwin Brady, Chris Morris and others (kaya@kayalang.org). For further information see http://kayalang.org/

LICENSE

       The Kaya standard library is free software; you can redistribute it and/or modify it under the terms  of  the  GNU  Lesser  General  Public
       License (version 2.1 or any later version) as published by the Free Software Foundation.

RELATED

       Binary.Binary(3kaya)
       Binary.array(3kaya)
       Binary.copyChunk(3kaya)
       Binary.peek(3kaya)
       Binary.peekString(3kaya)
       Binary.setBlockData(3kaya)

Kaya								   October 2012 				       Binary.getBlockChunk(3kaya)
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