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#include <stdio.h>
#include <sys/file.h>
#include <fcntl.h>
#ifdef UTMPX
#include <utmpx.h>
#endif
#include <utmp.h>
char *ut_typename (t) {
switch (t) {
#define S(N) case N : return #N
S(EMPTY);
S(RUN_LVL);
S(BOOT_TIME);
S(OLD_TIME);
S(NEW_TIME);
S(INIT_PROCESS);
S(LOGIN_PROCESS);
S(USER_PROCESS);
S(DEAD_PROCESS);
S(ACCOUNTING);
default: return "??";
}
}
int main (argc, argv) int argc; char *argv[]; {
int f;
char id[5], user[50];
char *file = 0;
int all = 0;
while (*++argv)
{
char *arg = *argv;
if (!arg)
break;
if (!strcmp ("-a", arg))
all = 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;
#ifdef UTMPX
if ('x' != file[strlen(file) - 1]) {
struct utmpx u;
while (read (f, &u, sizeof (u)) == sizeof (u)) {
char c;
if ((u.ut_type == DEAD_PROCESS
|| u.ut_type == EMPTY)
&& !all)
continue;
strncpy (id, u.ut_id, 4);
printf ("%-8s:%-12s:%-4s:%6d %s",
u.ut_user, u.ut_line, id,
u.ut_pid, ut_typename (u.ut_type));
/* ctime (&u.ut_xtime) + 4 */
if (u.ut_syslen && u.ut_host[0])
printf (" %s", u.ut_host);
printf ("\n");
return 0;
}
}
/* else */
#endif
{
struct utmp u;
user[sizeof(u.ut_user)] = 0;
while (read (f, &u, sizeof (u)) == sizeof (u)) {
char c;
if ((u.ut_type == DEAD_PROCESS
|| u.ut_type == EMPTY)
&& !all)
continue;
strncpy (id, u.ut_id, 4);
strncpy (user, u.ut_user, sizeof (u.ut_user));
printf ("%-8s:%-12s:%-4s:%6d %s", user, u.ut_line, id,
u.ut_pid, ut_typename (u.ut_type));
printf ("\n");
#if 0
printf ("user: %-32s id: %s\n", user, id);
printf (" line: %-32s pid:%-6d type: %s\n",
u.ut_line, u.ut_pid, ut_typename (u.ut_type));
printf (" exit_status: %d,%d\n",
u.ut_exit.e_termination, u.ut_exit.e_exit);
printf (" time: %s\n", ctime (&u.ut_time) + 4);
#endif
}
}
return 0;
}
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