Messages in this thread | | | Date | Sun, 26 Jan 2003 16:42:10 -0800 | From | David Ashley <> | Subject | Re: Serious filesystem bug in linux [nevermind] |
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>On Sun, Jan 26, 2003 at 03:18:49PM -0800, David Ashley wrote: > >> -rw-r--r-- 1 root root 1965107636224 Jan 26 14:59 output1.iso > >You know about the Unix concept of files with holes?
No, but I can look into it. There is definitely some bug in my program but I wouldn't expect this behaviour. So if I seek way the hell out to nowhere, do a write, I'll have a file of the total amount I've skipped over?
I just wrote a test program and it did exactly this. Thanks!
Here is the program #define _LARGEFILE64_SOURCE #include <fcntl.h> #include <unistd.h>
main() { int fd; char buff[32]; fd=open("/tmp/crazybigfile",O_RDWR|O_CREAT|O_TRUNC|O_LARGEFILE,0644); lseek64(fd,1000000000000ll,SEEK_SET); write(fd,buff,32); close(fd);
}
Live and learn. Sorry for the alarm!
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