Setting up a chroot environnement to build rpm

Since I got an access on a remote computer without root access, I was wondering how to build rpm and test it. Some time, I need to install packages, -devel packages as dependencies or my own packages to test them. It seems to me unfair to notiy this computer administrator each time I want a package installed. Since root access isnot a good method, I thinks the best one is to set up a chroot enviromment.

chroot envirionnement have plenty of avantage for building. You may build packages in a fresh environnement each time you want to build one, install packages or remove it, etc.

To create it, I've just created a chroot directory in my home directory. I copied /bin, /usr, /sbin, /var, /opt, /srv. You must then create dev, proc and sys, and mount the corresponding pseudo-filesystems.  Then you canchange root. You may ask to your admin to mount e pseudo-filesystems and to give you access to chroot() syscall via sudo. You just need to ask for %user ALL NOPASSWD: /usr/sbin/chroot

In a nutshell, commands are :

mkdir $HOME/chroot

cp -r /bin /sbin /root /usr /opt /var /srv $HOME/chroot

mkdir $HOME/chroot/{proc,dev,sys}

As root (or ask your admin)

mount -t proc none /home/user/chroot/proc

mount -t sysfs none /home/user/chroot/sys

mount -t debugfs none /home/user/chroot/sys/kernel/debug

mount -o bind /dev /home/user/chroot/dev

Then you just have to do chroot $HOME/chroot /bin/bash

If you plan to share the chroot with other users, you should be carefull, as everyone may be root at the same time.