On 9/30/18 5:24 PM, Elvira Khabirova wrote: > Based on text from Documentation/filesystems/ramfs-rootfs-initramfs.txt. > > Signed-off-by: Elvira Khabirova <lineprinter@xxxxxxxxxxxx> Thanks, Elvira. Patch applied. Cheers, Michael > --- > man2/pivot_root.2 | 11 +++++++++++ > 1 file changed, 11 insertions(+) > > diff --git a/man2/pivot_root.2 b/man2/pivot_root.2 > index 2f8f5f4b9..f01b128a3 100644 > --- a/man2/pivot_root.2 > +++ b/man2/pivot_root.2 > @@ -131,6 +131,17 @@ is Linux-specific and hence is not portable. > .SH NOTES > Glibc does not provide a wrapper for this system call; call it using > .BR syscall (2). > +.PP > +The rootfs (initial ramfs) cannot be > +.BR pivot_root ()ed. > +The recommended method of changing the root filesystem in this case is to delete > +everything in rootfs, overmount rootfs with the new root, attach > +.IR stdin / stdout / stderr > +to the new > +.IR /dev/console , > +and exec the new init. Helper > +programs for this process exist; see > +.BR switch_root (8). > .SH BUGS > .BR pivot_root () > should not have to change root and current working directory of all other > -- Michael Kerrisk Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ Linux/UNIX System Programming Training: http://man7.org/training/
