UPDWTMP(3)                          Linux Programmer's Manual                          UPDWTMP(3)



NAME
       updwtmp, logwtmp - append an entry to the wtmp file

SYNOPSIS
       #include <utmp.h>

       void updwtmp(const char *wtmp_file, const struct utmp *ut);
       void logwtmp(const char *line, const char *name, const char *host);

DESCRIPTION
       updwtmp() appends the utmp structure ut to the wtmp file.

       logwtmp()  constructs  an  utmp structure using line, name, host, current time and current
       process id.  Then it calls updwtmp() to append the structure to the utmp file.

AVAILABILITY
       Both functions are available under glibc2, but not under libc5.  However, logwtmp used  to
       occur  in  the old libbsd. These days, the logwtmp function is included in libutil. (Hence
       you'll need to add -lutil to your compiler commandline to get it.)

FILES
       /var/log/wtmp
              database of past user logins

SEE ALSO
       wtmp(5)



GNU                                         2003-07-18                                 UPDWTMP(3)