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
This page is part of release 4.04 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 http://www.kernel.org/doc/man-pages/.