utmp(4)
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utmp, wtmp File Format
utmp and wtmp entry formats
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SYNTAX
#include <sys/types.h>
#include <limits.h>
#include <utmp.h>
DESCRIPTION
These files, which hold user and accounting information for such
commands as who(1), write(1), and login(1), have the following
structure as defined by <utmp.h>:
#define UTMP_FILE "/etc/utmp"
#define WTMP_FILE "/etc/wtmp"
#define ut_name ut_user
struct utmp {
char ut_user[USR_NAME]; /* User login name */
char ut_id[4]; /* /etc/inittab id (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 */
char ut_host[16]; /* hostname, if remote */
};
DG/UX 4.00 Page 1
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utmp(4)
/* 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
/etc/utmp
/etc/wtmp
SEE ALSO
limits.h(4), getut(3c).
login(1), who(1), write(1) in the User's Reference for the DG/UX
System.
DG/UX 4.00 Page 2
Licensed material--property of copyright holder(s)