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LWP_CACHE_CREDS(9)	 BSD Kernel Developer's Manual	    LWP_CACHE_CREDS(9)

NAME
     LWP_CACHE_CREDS — synchronize LWP credential with process credential

SYNOPSIS
     #include <sys/lwp.h>

     void
     LWP_CACHE_CREDS(lwp_t *l, struct proc *p);

DESCRIPTION
     LWP_CACHE_CREDS() updates the LWP's cached credential to match with the
     process' credential if the latter has been changed after the last syn‐
     chronization.

     Each LWPs have its cached credential so that it can be used without wor‐
     rying about potential of other LWP changing the process' credential.
     kauth_cred_get() returns the cached credential.

     LWP_CACHE_CREDS() is called by MD entry code for system call and various
     traps.  LWPs which can live in kernel for long period should call
     LWP_CACHE_CREDS() by itsself to refresh its credential.

     LWP_CACHE_CREDS() takes the following arguments.

     l	The calling lwp.

     p	The process which the lwp l belongs to.

     LWP_CACHE_CREDS() might be implemented as a macro.

SEE ALSO
     intro(9), kauth(9)

BSD			       December 9, 2007				   BSD

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