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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)
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⟨Linux man-pages 6.15 2025-05-17 group_member(3)
Pages that refer to this page: getgroups(2), getgrouplist(3)
