group_member(3) Library Functions Manual group_member(3)

group_member - test whether a process is in a group

Standard C library (libc, -lc)

#include <unistd.h>
int group_member(gid_t gid);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

group_member():


_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.

getgid(2), getgroups(2), getgrouplist(3), group(5)

2023-10-31 Linux man-pages 6.06