On 07 Oct 2016 14:33, Michael Kerrisk (man-pages) wrote: > On 10/06/2016 07:23 PM, Mike Frysinger wrote: > > If the target process is in a different mount namespace, the root symlink > > actually shows that view of the filesystem. As an example: > > /* Terminal 1 */ > > $ unshare -Urnm > > # mount -t tmpfs tmpfs /etc > > # mount --bind /bin /dev > > # echo $$ > > 17168 > > > > /* Terminal 2 */ > > # ls /etc # Normal view of /etc files. > > # ls /proc/17168/root/etc # Empty view of the tmpfs. > > # ls /dev # Normal view of /dev files. > > # ls /proc/17168/root/dev # Contents of /bin files. > > Thanks for the patch! And thanks for the commit message, which is I think > actually useful text for the man page itself, so I added it (in somewhat > modified form) to the page itself. looks like some formatting is off ? -mike --- a/man5/proc.5 +++ b/man5/proc.5 @@ -1525,7 +1525,7 @@ and in that shell we create some new mount points: $ \fBPS1='sh1# ' unshare \-Urnm\fP sh1# \fBmount \-t tmpfs tmpfs /etc\fP # Mount empty tmpfs at /etc sh1# \fBmount \-\-bind /usr /dev\fP # Mount /usr at /dev -sh1# \fBecho $$ +sh1# \fBecho $$\fP 27123 .in .fi @@ -1533,10 +1533,10 @@ sh1# \fBecho $$ In a second terminal window, in the initial mount namespace, we look at the contents of the corresponding mounts in the initial and new namespaces: - + .nf .in +4n -$ \fBPS1='sh2# ' sudo sh +$ \fBPS1='sh2# ' sudo sh\fP sh2# \fBls /etc | wc \-l\fP # In initial NS 309 sh2# \fBls /proc/27123/root/etc | wc \-l\fP # /etc in other NS
Attachment:
signature.asc
Description: Digital signature
