In a message written on Tue, Jul 29, 2003 at 05:27:14PM +0200, Bogdan TARU wrote: > I have tried to create some files of myself, with 'spaces' in them > (holes?), but they don't act like this. So could you please explain what > 'sparse' means, and the 'trick' to create them?
% cat sparse.c
#include <sys/types.h>
#include <sys/uio.h>
#include <fcntl.h>
#include <unistd.h>
int main(void) {
int fd;
fd = open("sparse-file", O_RDWR|O_CREAT);
lseek(fd, 1024*1024*1024, SEEK_SET);
write(fd, "0123456789", 10);
close(fd);
}
% cc -o sparse sparse.c
% ./sparse
% ls -lag sparse-file
-r-xr----- 1 bicknell bicknell 1073741834 Jul 29 11:52 sparse-file*
% du -k sparse-file
48 sparse-file
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Leo Bicknell - [EMAIL PROTECTED] - CCIE 3440
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