#include <sys/types.h>
#include <unistd.h>
int getgroups(int size, gid_t list[]);
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
int main()
{
gid_t list[8];
int x, i;
x = getgroups(8, list);
for (i = 0; i < x; i++)
printf ("%d : %d\n", i, list);
return 0;
}
./getgroups
0 : 33
1 : 100
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