On 10/07/2016 09:21 PM, Mike Frysinger wrote: > 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 $$ >>> 17168 >>> >>> /* Terminal 2 */ >>> # ls /etc # Normal view of /etc files. >>> # ls /proc/17168/root/etc # Empty view of the tmpfs. >>> # ls /dev # Normal view of /dev files. >>> # ls /proc/17168/root/dev # Contents of /bin files. >> >> Thanks for the patch! And thanks for the commit message, which is I think >> actually useful text for the man page itself, so I added it (in somewhat >> modified form) to the page itself. > > looks like some formatting is off ? Thanks, Mike. Patch applied. Cheers, Michael > --- a/man5/proc.5 > +++ b/man5/proc.5 > @@ -1525,7 +1525,7 @@ and in that shell we create some new mount points: > $ \fBPS1='sh1# ' unshare \-Urnm\fP > sh1# \fBmount \-t tmpfs tmpfs /etc\fP # Mount empty tmpfs at /etc > sh1# \fBmount \-\-bind /usr /dev\fP # Mount /usr at /dev > -sh1# \fBecho $$ > +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 > -- Michael Kerrisk Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ Linux/UNIX System Programming Training: http://man7.org/training/ -- To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
