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Top Forums Shell Programming and Scripting Show Percentage Compression in GZIP Post 302834111 by Corona688 on Thursday 18th of July 2013 11:11:34 AM
Old 07-18-2013
Not really... It's not supposed to know or care how long the file is, it just reads and writes and churns until the OS says 'ok, all done'. If a stream compressor can't handle input of arbitrary length, that's a bug.

So the code that broke down here technically had nothing to do with the compression. Fortunately. Smilie
 

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FREAD(3)						     Linux Programmer's Manual							  FREAD(3)

NAME
fread, fwrite - binary stream input/output SYNOPSIS
#include <stdio.h> size_t fread(void *ptr, size_t size, size_t nmemb, FILE *stream); size_t fwrite(const void *ptr, size_t size, size_t nmemb, FILE *stream); DESCRIPTION
The function fread reads nmemb elements of data, each size bytes long, from the stream pointed to by stream, storing them at the location given by ptr. The function fwrite writes nmemb elements of data, each size bytes long, to the stream pointed to by stream, obtaining them from the loca- tion given by ptr. For non-locking counterparts, see unlocked_stdio(3). RETURN VALUE
fread and fwrite return the number of items successfully read or written (i.e., not the number of characters). If an error occurs, or the end-of-file is reached, the return value is a short item count (or zero). fread does not distinguish between end-of-file and error, and callers must use feof(3) and ferror(3) to determine which occurred. CONFORMING TO
The functions fread and fwrite conform to ANSI X3.159-1989 (``ANSI C''). SEE ALSO
read(2), write(2), feof(3), ferror(3), unlocked_stdio(3) BSD MANPAGE
1996-05-17 FREAD(3)
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