Messages in this thread | | | Date | Sat, 22 May 1999 10:23:38 -0500 | From | Jeff Epler <> | Subject | Re: access to proc filesystem from chrooted process |
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On Fri, May 21, 1999 at 03:14:31PM +0100, Riley Williams wrote: > Are you referring to some means of mounting /proc so it appears > visible to ALL processes no matter where they're chroot'd to? If so, > I'd love to know how. > > Sure, I know that the proc file system does not have to be mounted > over /proc (although it usually is), but I'd love to know how to mount > it so that it's visible to two processes that are respectively > chroot'd as follows: > > 1. /home/ftp (aka ~ftp) > > 2. /usr/mirrors (aka ~mirrors) > > As you can see, there are no common subdirectories between those two > processes...
craie# id uid=0(root) gid=405(jepler) groups=405(jepler),0(root),6(disk),10(wheel),19(floppy) craie# /bin/pwd /tmp/proc-test craie# for i in a b c d e f g; do mkdir $i; mount -t proc none /tmp/proc-test/$i; done craie# ls -l ?/self/exe lrwx------ 1 root jepler 0 May 22 10:22 a/self/exe -> /bin/ls lrwx------ 1 root jepler 0 May 22 10:22 b/self/exe -> /bin/ls lrwx------ 1 root jepler 0 May 22 10:22 c/self/exe -> /bin/ls lrwx------ 1 root jepler 0 May 22 10:22 d/self/exe -> /bin/ls lrwx------ 1 root jepler 0 May 22 10:22 e/self/exe -> /bin/ls lrwx------ 1 root jepler 0 May 22 10:22 f/self/exe -> /bin/ls lrwx------ 1 root jepler 0 May 22 10:22 g/self/exe -> /bin/ls
Just mount /proc in any place you want it.
Heck, you could even do something "fancy" like #!/bin/sh [ -d $1/proc ] || mkdir $1/proc mount -t proc none $1/proc exec /sbin/real-chroot $* umount $1/proc # only if not a daemon
Jeff -- \/ http://incolor.inetnebr.com/jepler/ Jeff Epler jepler@inetnebr.com Send some filthy mail.
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