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#include <stdio.h>
#include <sys/file.h>
#include <fcntl.h>
#ifndef UTMPX
#ifdef HAVE_UTMPX_H
#define UTMPX
#endif
#endif
#ifdef UTMPX
#include <utmpx.h>
#endif
#include <utmp.h>
extern char *ctime ();
#if defined (HAVE_STRUCT_UTMP_UT_TYPE) || defined (UTMPX)
char *ut_typename (t) {
switch (t) {
#define S(N) case N : return #N
#define S2(N,N2) case N : return #N2
S(EMPTY);
S(RUN_LVL);
S(BOOT_TIME);
S(OLD_TIME);
S(NEW_TIME);
S2(INIT_PROCESS,INIT);
S2(LOGIN_PROCESS,LOGIN);
S2(USER_PROCESS,USER);
S2(DEAD_PROCESS,DEAD);
S(ACCOUNTING);
default: return "??";
}
}
#endif
int main (argc, argv) int argc; char *argv[]; {
int f;
char id[5], user[50], host[100];
char *file = 0;
int all = 0;
int is_utmpx = 0;
while (*++argv)
{
char *arg = *argv;
if (!arg)
break;
if (!strcmp ("-a", arg))
all = 1;
else if (!strcmp ("-x", arg))
is_utmpx = 1;
else if (arg[0] == '-')
{
fprintf (stderr, "unknown arg `%s'\n", arg);
return 1;
}
else if (file)
{
fprintf (stderr, "already got a file\n");
return 1;
}
else
file = arg;
}
f = open (file, O_RDONLY);
if (f < 0) {
perror (file);
exit (1);
}
id[4] = 0;
if (is_utmpx) {
#ifdef UTMPX
struct utmpx u;
while (1) {
int nread = read (f, &u, sizeof (u));
if (nread == 0) {
/* eof */
return 0;
} else if (nread == -1) {
/* error */
perror ("read");
return 1;
}
if ((u.ut_type == DEAD_PROCESS
|| u.ut_type == EMPTY)
&& !all)
continue;
strncpy (id, u.ut_id, 4);
printf ("%-8s:%-12s:%-4s", u.ut_user, u.ut_line, id);
printf (":%5d", u.ut_pid);
printf ("(%5d,%5d)", u.ut_exit.e_termination, u.ut_exit.e_exit);
printf (" %-9s %s", ut_typename (u.ut_type), ctime (&u.ut_xtime) + 4);
if (u.ut_syslen && u.ut_host[0])
printf (" %s\n", u.ut_host);
}
abort ();
#else
fprintf (stderr, "utmpx support not compiled in\n");
return 1;
#endif
}
/* else */
{
struct utmp u;
while (read (f, &u, sizeof (u)) == sizeof (u)) {
#ifdef EMPTY
if ((u.ut_type == DEAD_PROCESS
|| u.ut_type == EMPTY)
&& !all)
continue;
#endif
#ifdef HAVE_STRUCT_UTMP_UT_PID
strncpy (id, u.ut_id, 4);
strncpy (user, u.ut_user, sizeof (u.ut_user));
user[sizeof(u.ut_user)] = 0;
printf ("%-8s:%-12s:%-4s", user, u.ut_line, id);
printf (":%5d", u.ut_pid);
#else
strncpy (user, u.ut_name, sizeof (u.ut_name));
user[sizeof(u.ut_name)] = 0;
printf ("%-8s:%-12s", user, u.ut_line);
#endif
#ifdef HAVE_STRUCT_UTMP_UT_HOST
{
char host[sizeof (u.ut_host) + 1];
strncpy (host, u.ut_host, sizeof(u.ut_host));
host[sizeof (u.ut_host)] = 0;
printf (":%-*s", sizeof (u.ut_host), host);
}
#endif
#ifdef HAVE_STRUCT_UTMP_UT_EXIT
printf ("(%5d,%5d)", u.ut_exit.e_termination, u.ut_exit.e_exit);
#endif
#ifdef HAVE_STRUCT_UTMP_UT_TYPE
printf (" %-9s", ut_typename (u.ut_type));
#endif
/* this ends with a newline */
printf (" %s", ctime (&u.ut_time) + 4);
}
}
return 0;
}
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