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[vox-tech] [C] randomly accessing file data in C
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[vox-tech] [C] randomly accessing file data in C


I'm trying to access data in a file in C.  I want to read some portion of
it, modify it, then rewrite that portion back into the file.

Reading isn't a problem -- I can use fseek or lseek or whatever and read
the data I want using fread or read.  No problem.

Writing is another matter.  When I seek to the spot and write the modified
data, it destroys the data that comes afterwards.

There's another catch: I gotta use 64-bit safe calls because the file I'm
reading/writing is quite big (> 2GB).  And since the file is so big, I
can't store the data that follows to prevent it from getting overwritten.

Anybody know how to do this?  I'm so disheartened.  Please help!!  Thanks!


Mark K. Kim
PGP key available upon request.

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