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group_member(3)

GNU
2014-03-30

manpages-dev

Manual pages about using GNU/Linux for development

man-pages

Linux kernel and C library user-space interface documentation

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.

COLOPHON

This page is part of release 5.00 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.
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