LWP_CACHE_CREDS(9)

💖 LWP_CACHE_CREDS(9) 💖

okay so bestie, we're in the Kernel Developer's Manual and this page is literally all about LWP_CACHE_CREDS — the sync-up that keeps an LWP's cached credential matching the process credential. ✨

🌸 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 so it matches the process' credential if the latter has been changed after the last synchronization. no cap, that's the whole vibe check. 💅

Every LWP has its own cached credential so that it can be used without worrying 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 itself to refresh its credential. ⭐

LWP_CACHE_CREDS() takes the following arguments.

• l — the calling lwp. 👑
• p — the process which the lwp l belongs to. 🫶

lowkey important: LWP_CACHE_CREDS() might be implemented as a macro. so don't be shocked if it's giving macro energy. 💀

🌈 SEE ALSO 🌈

• intro(9)
• kauth(9)

that's the whole page, bestie — brought to you by Debian, dated December 9, 2007. periodt. 💖✨