GROUPMEMBER(9)

okay so bestie, we're looking at GROUPMEMBER(9) from the Kernel Developer's Manual, and it's literally the vibe check for group membership. no cap. 🫶

🌸 NAME 🌸

groupmember — checks if credentials mandate some group membership. that's the whole name, and yes she ate. 💅

✨ SYNOPSIS ✨

#include <sys/param.h>
#include <sys/ucred.h>

bool
groupmember(gid_t gid, const struct ucred *cred);

bool
realgroupmember(gid_t gid, const struct ucred *cred);

🦋 DESCRIPTION 🦋

The groupmember() function checks if credentials cred indicate that the associated subject or object is a member of the group designated by the group ID gid. think: do these creds say ur in the group? 👀

Considered groups in cred are the effective and supplementary groups. The real group is not taken into account. periodt. 🚫

Function realgroupmember() works the same except that it considers instead the real and supplementary groups, and not the effective one. so it's giving same energy, different group list. 💖

🎀 RETURN VALUES 🎀

The groupmember() and realgroupmember() functions return true if the given credentials indicate membership of the group gid, or false otherwise. no in-between, bestie — just yes or no. ✅❌

🔥 SEE ALSO 🔥

• getgroups(2)
• setgroups(2)

👑 AUTHORS 👑

This manual page was initially written by Chad David <davidc@acns.ab.ca> and was revised by Olivier Certner <olce.freebsd@certner.fr>. iconic collab fr fr. 🌈

mwah 💋 this page is from Debian, dated October 31, 2024, and the manual is GROUPMEMBER(9) — slay and bye. 🎀