#include <stdio.h>
#include <sys/types.h>
#include <stdlib.h>
#include <pwd.h>
#include <grp.h>



main( int argc, char **argv)
{
	register struct group *g;
	int f=0;
	gid_t gid;

	setgrent();

	while ((g = getgrent()) != NULL)
	{
		fprintf(stdout,"%s:%d\n",g->gr_name,g->gr_gid);
		f++;
	}
	if (0 == f) perror("getgrent");
	endgrent();

	
	gid=getgid();

	if ( gid==3000 )
		puts("OK");

	setgrent();
	if ((g = getgrnam("giga")) == NULL)
		perror("getgrnam");
	else
		while (*(g->gr_mem) != NULL)
		{
			puts(*(g->gr_mem));
			if (0==strcmp(argv[1],*(g->gr_mem)))
			{
				puts("OK");
				break;
			}
			*(g->gr_mem)++;
		}
	endgrent();
	fprintf(stderr,"%s,%d\n","giga",g->gr_gid);

}	/* main */