NAME

       group_member - test whether a process is in a group

LIBRARY

       Standard C library (libc, -lc)

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.

STANDARDS

       This function is a nonstandard GNU extension.

SEE ALSO

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