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Though the petitboot UI is a user application, it is currently being run by root only because we use getty to display it on the console. Create an unprivileged user to run the UI instead. The unix socket the pb-discover daemon sets up is accessible to "petitgroup", so that should be the gid, with arbitrary uid "petituser" to match. This is currently the chain of processes leading to the UI: 1. /etc/init.d/pb-console start console 2. /usr/libexec/petitboot/pb-console --getty --detach -- -n -i 0 console linux 3. /sbin/getty -l/usr/libexec/petitboot/pb-console -n -i 0 console linux 4. /usr/libexec/petitboot/pb-console 5. /usr/sbin/petitboot-nc Instead of (3) running the pb-console helper directly with "getty -l", we can use "agetty -a" to autologin petituser, and run pb-console via petituser's login shell: 1. /etc/init.d/pb-console start console 2. /usr/libexec/petitboot/pb-console --getty=/sbin/agetty --detach -- -a petituser -n -i console linux 3. /sbin/agetty -a petituser -n -i console linux 4. /home/petituser/.profile 5. /usr/libexec/petitboot/pb-console 6. /usr/sbin/petiboot-nc Here, everything from (4) down is running as petituser. In (4), use $PPID to determine if we're logging in via getty, so that logging in by other means will give a normal shell. Otherwise we would recurse when trying to get a shell from the menu. Signed-off-by: Reza Arbab <arbab@linux.ibm.com> [Arnout: explicitly select util-linux, even though it comes indirectly through other dependencies] Signed-off-by: Arnout Vandecappelle <arnout@mind.be>
Buildroot is a simple, efficient and easy-to-use tool to generate embedded Linux systems through cross-compilation. The documentation can be found in docs/manual. You can generate a text document with 'make manual-text' and read output/docs/manual/manual.text. Online documentation can be found at http://buildroot.org/docs.html To build and use the buildroot stuff, do the following: 1) run 'make menuconfig' 2) select the target architecture and the packages you wish to compile 3) run 'make' 4) wait while it compiles 5) find the kernel, bootloader, root filesystem, etc. in output/images You do not need to be root to build or run buildroot. Have fun! Buildroot comes with a basic configuration for a number of boards. Run 'make list-defconfigs' to view the list of provided configurations. Please feed suggestions, bug reports, insults, and bribes back to the buildroot mailing list: buildroot@buildroot.org You can also find us on #buildroot on OFTC IRC. If you would like to contribute patches, please read https://buildroot.org/manual.html#submitting-patches