group_member(3) - BetterMan

group_member(3)

test whether a process is in a group

distropkg manpages-dev@6.9.1-1dataset 2026-04-01T06:19:02Z+debian+ec4110e+mandoc:1.14.6-4

Synopsis

#include <unistd.h>
int group_member(gid_t 
gid
);
group_member
():
_GNU_SOURCE

—

NAME

group_member - test whether a process is in a group

Standard C library (libc, -lc)

bash

#include <unistd.h>

bash

int group_member(gid_t \ngid\n);

group_member():

bash


\n
    _GNU_SOURCE

The group_member() function tests whether any of the caller's supplementary group IDs (as returned by getgroups(2)) matches gid.

The group_member() function returns nonzero if any of the caller's supplementary group IDs matches gid, and zero otherwise.

GNU.