🚀 go-pugleaf

In article <jono.670739550@dec06> jono@dec06.cs.monash.edu.au (Jonathan Oliver) writes:
>	system("copy file1 file2");
>
>there was not enough memory to perform the copy.

The two problems with your approach are that system() has to load a
copy of the command processor to do its job (which takes additional
time and memory), and you're assuming that there's a command called
"copy" on the system running your program.  Since "copy" is a
COMMAND.COM internal command, and not everyone who runs DOS uses
COMMAND.COM, your program is non-portable.  Also, system() usually
fails when your switch character is not set to "/".  In other words,
system() is not usually a wise choice in any "serious" program.

You should open "file1" and "file2" and do the copy yourself, something
like this:

int	copy(FILE *infile, FILE *outfile)
{
char	buf[BUFSIZ];
int		cnt;

while (cnt = fread(buf, sizeof(*buf), sizeof(buf), infile))
	if (fwrite(buf, sizeof(*buf), cnt, outfile) != cnt)
		return 1;			/* probably disk full */

return 0;
}
-- 
John W. Temples -- john@jwt.UUCP (uunet!jwt!john)