#include <sys/mman.h>
#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>
main() {
 int ff=open("test",O_RDWR|O_CREAT,0666);
 char *adr;
 lseek(ff,1<<24,0);
 write(ff,"",1);
 adr=mmap(0,1<<24,PROT_READ|PROT_WRITE,MAP_NOCORE,ff,0);


Try MAP_NOCORE|MAP_SHARED here. It's probably defaulting to a private
mapping.

WORKS!!! thank you.

another question - do i need to create 16MB hole to be able to write directly up to 16MB data. it would be nice if mmap is able to extend the file as needed without lseek/write. is it possible?

_______________________________________________
freebsd-questions@freebsd.org mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-questions
To unsubscribe, send any mail to "[EMAIL PROTECTED]"

Reply via email to