sudo ...

busybox 好像沒有包 sudo 進去。
只有：

config FEATURE_SUID_CONFIG
        bool "Enable SUID configuration via /etc/busybox.conf"
        default y
        depends on FEATURE_SUID
        help
        Allow the SUID/SGID state of an applet to be determined at runtime
        by checking /etc/busybox.conf. (This is sort of a poor man's sudo.)
        The format of this file is as follows:

        APPLET = [Ssx-][Ssx-][x-] [USER.GROUP]

        s: USER or GROUP is allowed to execute APPLET.
           APPLET will run under USER or GROUP
           (regardless of who's running it).
        S: USER or GROUP is NOT allowed to execute APPLET.
           APPLET will run under USER or GROUP.
           This option is not very sensical.
        x: USER/GROUP/others are allowed to execute APPLET.
           No UID/GID change will be done when it is run.
        -: USER/GROUP/others are not allowed to execute APPLET.

        An example might help:

        |[SUID]
        |su = ssx root.0 # applet su can be run by anyone and runs with
        |                # euid=0,egid=0
        |su = ssx        # exactly the same
        |
        |mount = sx- root.disk # applet mount can be run by root and members
        |                      # of group disk (but not anyone else)
        |                      # and runs with euid=0 (egid is not changed)
        |
        |cp = --- # disable applet cp for everyone

        The file has to be owned by user root, group root and has to be
        writeable only by root:
                (chown 0.0 /etc/busybox.conf; chmod 600 /etc/busybox.conf)
        The busybox executable has to be owned by user root, group
        root and has to be setuid root for this to work:
                (chown 0.0 /bin/busybox; chmod 4755 /bin/busybox)

        Robert 'sandman' Griebl has more information here:

• Link: suid