// RUN: %clangxx -O0 -g %s -o %t && %run %t
#include <stdlib.h>
#include <unistd.h>
#include <grp.h>
int main(void) {
gid_t *groups;
group *root;
int ngroups;
ngroups = sysconf(_SC_NGROUPS_MAX);
groups = (gid_t *)malloc(ngroups * sizeof(gid_t));
if (!groups)
exit(1);
if (!(root = getgrnam("root")))
exit(2);
if (getgrouplist("root", root->gr_gid, groups, &ngroups) == -1)
exit(3);
if (groups && ngroups) {
free(groups);
exit(0);
}
return -1;
}