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updwtmp (3)
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 a utmp structure using line, name, host, current
time and current process ID. Then it calls updwtmp() to append the
structure to the utmp file.
FILES
/var/log/wtmp
database of past user logins
CONFORMING TO
Not in POSIX.1-2001. Present on Solaris, NetBSD, and perhaps other
systems.
AVAILABILITY
Both functions are available under glibc2, but not under libc5. How-
ever, 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 command line to get it.)
SEE ALSO
wtmp(5)
GNU 2003-07-18 UPDWTMP(3)
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