That's nice. But NetBSDs init.c executes /etc/rc before calling
chroot(), and that's what i'm looking for, and for a moment tried to
implement, but i'm not very familiar with FreeBSD code :)
For example that kenv() came to me as a suprise. I'll have to try to
implement the NetBSD way where /etc/rc is executed before chroot().
Ofcourse now that i dont have to use sysctls, it's alot easier.
M. Warner Losh wrote:
BTW, here's a patch to test. Since FreeBSD has kenv(2), the patch is
actually very small.
Warner
------------------------------------------------------------------------
Index: init.c
===================================================================
RCS file: /cache/ncvs/src/sbin/init/init.c,v
retrieving revision 1.62
diff -u -r1.62 init.c
--- init.c 8 Jun 2006 14:04:36 -0000 1.62
+++ init.c 28 Dec 2006 20:39:33 -0000
@@ -55,6 +55,7 @@
#include <db.h>
#include <errno.h>
#include <fcntl.h>
+#include <kenv.h>
#include <libutil.h>
#include <paths.h>
#include <signal.h>
@@ -187,6 +188,7 @@
int
main(int argc, char *argv[])
{
+ char init_chroot[PATH_MAX];
int c;
struct sigaction sa;
sigset_t mask;
@@ -239,6 +241,12 @@
*/
openlog("init", LOG_CONS|LOG_ODELAY, LOG_AUTH);
+ *init_chroot = '\0';
+ kenv(KENV_GET, "init_chroot", init_chroot, sizeof(init_chroot));
+ if (*init_chroot)
+ if (chdir(init_chroot) != 0 || chroot(".") != 0)
+ warning("Can't chroot to %s: %m", init_chroot);
+
/*
* Create an initial session.
*/
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