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Shell Programming and Scripting

structured file update

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# 1  
Old 06-24-2009
structured file update
Hi
I have a very structured file consisting of multiple lines as follows:

3752 AVAILABLE 06/24/2009 FFFF 000000 0000 0000
3753 TRADITION (ASIA) LTD TACB 008329 0000 0000
3754 WACHOVIA CONVS/PRFDS WBCP 001099 0000 0000
3755 AVAILABLE 05/12/2009 FFFF 000000 0000 0000
3756 TAIPEI FUBON BANK TFCB 062640 0000 0000
3757 DAISHIN SECURITIES DSSK 034951 0000 0000
3758 Dexia Capital Mkts DEXT 005253 0000 0000

Is there a way to substitute line:

"3756 TAIPEI FUBON BANK TFCB 062640 0000 0000"

with the following:

"3756 AVAILABLE 06/24/2009 FFFF 000000 0000 0000"

without opening the file.... Thanks a lot -A
# 2  
Old 06-24-2009
In a word... no! (unless someone else has a better idea)

And if you don't mind me saying, that's a rather odd question.

It's like having a dentist giving you a filling, without you opening your mouth Smilie
# 3  
Old 06-24-2009
Well, if the target and replacement lines are of identical length, one could theoretically open up the raw device, find the sector which contains this data, and rewrite that sector with the new data.

But if you make one little mistake... oops! there goes the filesystem!
# 4  
Old 06-24-2009
One could quite equally go to a Sudanese dentist?
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