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Download Embedded Linux Primer: A Practical, Real-World
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outputs a line for each symlink created. For brevity, only the first few and last few symlink announcementsaredisplayed.Theellipsisinthelistingrepresentsthosewehaveeliminated. The message about setuid is also displayed by the install script, to remind you that it might be necessary to make your busybox executable setuid root. This is to allow BusyBox functions that require root access to function properly even when invoked by a nonroot user. This is not strictly necessary, especially in an embedded Linux environment, where it is common to have only a root accountonasystem.Ifthisisnecessaryforyourinstallation,therequiredcommand(chmod+s)is showninListing11-9. Theresultofthisinstallationstepisthatthebusyboxbinaryandsymlinktreeareinstalledonour targetrootfilesystem.TheendresultlooksverysimilartoListing11-4. ItisusefultonotethatBusyBoxalsohasanoptiontoenablecreationofthissymlinktreeonthe target system at runtime. This option is enabled in the BusyBox configuration and is invoked at runtimebyexecutingbusyboxwiththe-installoption.Youmusthavethe/procfilesystemmountedon yourtargetsystemforthissupporttowork.
