#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <utmpx.h>
#include <unistd.h>
#include <pwd.h>
#include <grp.h>
#include <dlfcn.h>

char *(*fun)(char*);
char *name;

int main(int argc, char **argv)
{


	int ip=0,grupa=0, wybor;
	while ((wybor = getopt (argc, argv, "ab")) != -1)
	switch(wybor) {
		case 'a' : ip = 1; break;
		case 'b' : grupa = 1; break;
		default: return 0;
	}

	struct utmpx *user;
	user = getutxent();

	struct group *grupy;
	struct passwd *pw;
	int ngroups, i, *groups;

	void *handle = dlopen("./libso.so.0.1", RTLD_LAZY);
	if (!handle)
	{
		dlerror();
		printf(" blad ");
	}
	else {
		fun = dlsym(handle, "fun");
		while ( user != NULL )
		{
			if(user->ut_type == USER_PROCESS)
			{
				printf("%s ", user->ut_user );

				if(user->ut_type == USER_PROCESS && ip == 1)
					printf("%s ", user->ut_host);

				if(user->ut_type == USER_PROCESS && grupa == 1)
				{
					//char *name = fun(user->ut_user);
					name=fun(user->ut_user);
					printf("%s", name);
					free(name);
				}
				printf("\n");
			}
			user=getutxent();
		}
		dlclose(handle);
		endutxent();
	}
	}



#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <utmpx.h>
#include <unistd.h>
#include <pwd.h>
#include <grp.h>
#include "libso.h"


char *fun(char *name)
{

	struct utmpx *user;

	struct group *grupy;
	struct passwd *pw;
	int ngroups, i, *groups;
	char *mgrupy;

	mgrupy = malloc(100 * sizeof(char));

	groups = malloc(ngroups * sizeof (int));
	pw = getpwnam(name);
	getgrouplist(name, pw->pw_gid, groups, &ngroups);
	getgrouplist(name, pw->pw_gid, groups, &ngroups);

	for(i=0; i<ngroups; i++)
	{
		grupy=getgrgid(groups[i]);
		if(grupy !=NULL )
		{
			strcat(mgrupy,grupy->gr_name);

		}
	}
	free(groups);
	return mgrupy;

}


#include <stdlib.h>
#include <stdio.h>
#include <utmpx.h>
#include <pwd.h>
#include <grp.h>
#include <string.h>
#include <unistd.h>

char *fun(char *name);