utmp

Synopsis:

#include <utmp.h>

struct utmp {
    char    ut_user[UT_NAMESIZE];
#define ut_name ut_user
    char    ut_id[4];
    char    ut_line[UT_LINESIZE];
    pid_t   ut_pid;
    short   ut_type;
    struct exit_status {
        short   e_termination;
        short   e_exit;
    } ut_exit;
    short   ut_spare;
    time_t  ut_time;
};

Description:

The utmp structure describes an entry in a user-information file. The members include:

ut_user

The user's login name.

ut_id

The line number.

ut_line

The device name (console).

ut_pid

The process ID.

ut_type

The type of entry. The possible values are:

EMPTY
RUN_LVL
BOOT_TIME
OLD_TIME
NEW_TIME
INIT_PROCESS
LOGIN_PROCESS
USER_PROCESS
DEAD_PROCESS
ACCOUNTING

ut_exit

The exit status of a process marked as DEAD_PROCESS. The structure exit_status includes at least the following members:

e_termination — the termination status.
e_exit — the exit status.

ut_time

The time that this entry was made.

Classification:

Unix