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#include <stdio.h>
#include <sys/types.h>
#include <time.h> // nust be included before utmp.h for FreeBSD
#include <utmp.h>
#include "usersmeter.h"
Users getUsers()
{
Users users;
users.number = 0;
#ifdef __FreeBSD__
FILE *ut;
if ((ut = fopen(_PATH_UTMP, "r")) != NULL)
{
struct utmp usr;
/* only entries with both name and line fields */
while (fread((char *)&usr, sizeof(usr), 1, ut) == 1)
if (*usr.ut_name && *usr.ut_line)
users.number++;
fclose(ut);
}
#else
// __linux__ and __sun__
// ideas out of the program "uptime"
setutent();
struct utmp *utmpstruct;
while ((utmpstruct = getutent()))
{
if ((utmpstruct->ut_type == USER_PROCESS) &&
(utmpstruct->ut_name[0] != '\0'))
users.number++;
}
endutent();
#endif
return users;
}
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