I have an embedded system built with busy box. I allow a user named "app" to download a program/script to a directory and it will be run on boot.
The program should be allowed to set the date. It is run as 'app' user.
How do I set busybox to allow the non-root user 'app' to set the date? I have tried to add the suid permission:
chmod u+s /bin/busybox.nosuid But it doesn't work. Also busybox is very anemic on why there is nosuid and suid versions, but apparently they've been compiled with different apps in them. There is no 'sudo' on the system.
root# which date /bin/date root# ls -l /bin/date lrwxrwxrwx 1 root root 19 Apr 22 2016 /bin/date -> /bin/busybox.nosuid root# ls -l /bin/busybox.nosuid -rwsr-xr-x 1 root root 14 Apr 22 2016 /bin/busybox.nosuid root# date Thu Jan 15 03:43:24 CET 1970 root# date -s 10:30 Thu Jan 15 10:30:00 CET 1970 root# date Thu Jan 15 10:30:01 CET 1970 root# su app app$ date Thu Jan 15 10:30:10 CET 1970 app$ date -s 11:00 date: can't set date: Operation not permitted Thu Jan 15 11:00:00 CET 1970 app$ date Thu Jan 15 10:30:21 CET 1970