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Top Forums Programming Doubt in C programming (copying data from one file to another) Post 302461579 by jim mcnamara on Monday 11th of October 2010 05:40:34 PM
Old 10-11-2010
Why bother converting between 'FILE *' and 'int'??
Because it is easier to use fopen for a beginner. open requires flags and mode settings.

does partial write need be considered??
That is what len does. It remembers how many bytes the read call got, for the write call.
the K&R code which seems to confuse people:
Code:
#include <stdlib.h>
#include <unistd.h>
int main(int argc, char **argv)
{
    char buf[8192]={0x0};
    int sz=0;
    while( (sz=read(0, buf, sizeof(buf) ) )>0  )
           write(1, buf, sz);
    return 0;
}

-- usage: ./copy < infile > outfile
That simple enough?
 

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DRRACKET(1)						      General Commands Manual						       DRRACKET(1)

NAME
drracket - the Racket programming environment SYNOPSIS
drracket [ Xoption ... ] [ file ... ] DESCRIPTION
DrRacket is the Racket programming environment. The drracket program treats non-switch command-line arguments as files to open. X OPTIONS
When running in X11, DrRacket accepts the following standard Xoptions: -display disp, -geometry geom, -bg color, -background color, -fg color, -foreground color, -fn font, -font font, -iconic, -name name, -rv, -reverse, +rv, -selectionTimeout time, -synchronous, -title name, -xnllanguage lang, -xrm file. In addition, the option -singleInstance is treated like an X option (it must appear before all other options), and it runs DrRacket in sin- gle-instance mode. In single-instance mode, when an existing instance is running with the same host and executable name, all non-option arguments are treated as file names and sent to the existing instance. MORE INFORMATION
For further information, run raco docs to open installed documentation in your web browser. Alternately, consult the on-line documentation and other information available at http://racket-lang.org/ AUTHOR
DrRacket was implemented by PLT. SEE ALSO
raco(1), racket(1), gracket(1) 4th Berkeley Distribution May 2010 DRRACKET(1)
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