group_member (3)

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Copyright (C) 2014, Michael Kerrisk <mtk.manpages@gmail.com>

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(The comments found at the beginning of the groff file "man3/group_member.3".)

NAME

group_member - test whether a process is in a group

SYNOPSIS

#include <unistd.h>

int group_member(gid_t gid);

Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

group_member(): _GNU_SOURCE

DESCRIPTION

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

RETURN VALUE

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

CONFORMING TO

This function is a nonstandard GNU extension.

SEE ALSO

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

COLOPHON

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