Message-ID: <37B5BAFA.504E01BB@unb.ca>
From: Endlisnis <s257m AT unb DOT ca>
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Subject: Re: length of file (baffling me)
References: <7p3u7u$ncb$1 AT nnrp1 DOT deja DOT com>
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Date: Sat, 14 Aug 1999 18:53:51 GMT
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

jsc AT lds DOT co DOT uk wrote:

> Hello all, this must be an easy question, but I can't seem to get it to work.
> All I'm trying to do is work out the length of a file. I use
>
> FILE *fp;
> fp = fopen(filename, "rb");
> printf( "File length: %i", filelength((int)fp) );
>
> I get -1 returned, indicating an error, but I can't see why.
> If anyone could help, I'd really appreciate it.

If you would have read the documentation on the filelength function, you would
have discovered that it takes an argument of a filedescriptor, and you can't just
cast a FILE* to an int and hope it works.  The docs clearly say to use the fileno
macro.

printf("File length: %i", filelength(fileno(fp)));


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