NAME

utmp, wtmp − utmp and wtmp entry formats

SYNOPSIS

#include <utmp.h>

DESCRIPTION

utmp and wtmp hold user and accounting information for commands such as who, write, and login.  These files have the following structure, defined in <utmp.h>:

#defineUTMP_FILE"/var/adm/utmp"
#defineWTMP_FILE"/var/adm/wtmp"
#defineut_nameut_user
 struct utmp {
char  ut_user[8];/∗ user login name ∗/
char  ut_id[4];/∗ /sbin/inittab id (created by ∗/
/∗ process that puts entry in utmp) ∗/
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;/∗ exit status of a process
/∗ marked as DEAD_PROCESS ∗/
time_t ut_time;/∗ time entry was made ∗/
};
/∗  Definitions for ut_type  ∗/
#defineEMPTY0
#defineRUN_LVL1
#defineBOOT_TIME2
#defineOLD_TIME3
#defineNEW_TIME4
#defineINIT_PROCESS5 /∗ process spawned by "init" ∗/
#defineLOGIN_PROCESS6 /∗ a "getty" process waiting for login ∗/
#defineUSER_PROCESS7 /∗ a user process ∗/
#defineDEAD_PROCESS8
#defineACCOUNTING9
#defineUTMAXTYPEACCOUNTING /∗ max legal value of ut_type ∗/
/∗  Below are 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 character in length.  ∗/
#defineRUNLVL_MSG"run−level %c"
#defineBOOT_MSG"system boot"
#defineOTIME_MSG"old time"
#defineNTIME_MSG"new time"

FILES

/var/adm/utmp

/var/adm/wtmp

SEE ALSO

login(1), who(1), write(1)

SunOS 5.5.1  —  Last change: 3 Jul 1990