utmp(F)

Format

Description

   #define UTMP_FILE      "/etc/utmp"
   #define WTMP_FILE      "/etc/wtmp"
   #define ut_name        ut_user
   

   struct  utmp {
           char    ut_user[8];             /* User login name */
           char    ut_id[4];               /* usually line # */
           char    ut_line[12];            /* device name (console, lnxx) */
           short   ut_pid;                 /* process id */
           short   ut_type;                /* type of entry */
           struct  exit_status {
               short       e_termination;  /* Process termination status */
               short       e_exit;         /* Process exit status */
   	} ut_exit;                      /* The exit status of a process
                                              marked as DEAD_PROCESS. */
           time_t  ut_time;                /* time entry was made */
   };

   /* Definitions for ut_type */
   

   #define EMPTY           0
   #define RUN_LVL         1
   #define BOOT_TIME       2
   #define OLD_TIME        3
   #define NEW_TIME        4
   #define INIT_PROCESS    5            /* Process spawned by "init" */
   #define LOGIN_PROCESS   6            /* A "getty" process waiting for login */
   #define USER_PROCESS    7            /* A user process */
   #define DEAD_PROCESS    8
   #define ACCOUNTING      9
   #define UTMAXTYPE       ACCOUNTING   /* Largest legal value of ut_type */
   

   /* Special strings or formats used in the "ut_line" field when  */
   /* accounting for something other than a process  */
   /* No string for the ut_line field can be more than 11 chars +  */
   /* a NULL in length  */

   #define	RUNLVL_MSG      "run-level %c"
   #define	BOOT_MSG        "system boot"
   #define	OTIME_MSG       "old time"
   #define	NTIME_MSG       "new time"

Files

/usr/include/utmp.h

full pathname of utmp header file

/etc/utmp

/etc/wtmp

user and accounting information files

See also

Standards conformance