On 9/29/07, Anthony DeRobertis <[EMAIL PROTECTED]> wrote:
> Hmm, if you're root you probably can. Something like this (completely
> untested; probably doesn't even compile):
Yes, it works, and AFAIK it has always done. A shorter program to test it:
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
int
main(void) {
struct stat s1, s2;
chdir("/");
chroot("/tmp");
stat(".", &s1);
stat("..", &s2);
if (s1.st_dev != s2.st_dev || s1.st_ino != s2.st_ino) {
printf("we are in a chroot\n");
}
return 0;
}
> Actually, come to think of it, I wonder if stat'ing "/.." would work...
> If it does, then you don't even need root.
No, it doesn't. "/" is always equal to "/.."; if not, anyone could
escape anytime from a chroot environment.
Juan
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