.\" Copyright 1997 Nicolás Lichtmaier <nick@debian.org>
.\" Created Wed Jul  2 23:27:34 ART 1997
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.TH UPDWTMP 3  "July 2, 1997" "GNU" "Linux Programmer's Manual"
.SH NAME
updwtmp, logwtmp \- append an entry to the wtmp file
.SH SYNOPSIS
.nf
.B #include <utmp.h>
.sp
.BI "void updwtmp(const char *" wtmp_file ", const struct utmp *" ut ");"
.br
.BI "void logwtmp(const char *" line ", const char *" name ", const char *" host ");"
.fi
.SH DESCRIPTION
\fBupdwtmp\fR() appends the utmp structure
.I ut
to the wtmp file.
.PP
\fBlogwtmp\fR() constructs an utmp structure using
.IR line ", " name ", " host ","
current time and current process id.
Then it calls \fBupdwtmp\fR() to append the structure to the utmp file.
.SH AVAILABILITY
Both functions are available under glibc2, but not under libc5.
However,
.B logwtmp
occurs in the old libbsd.
.SH FILES
.TP
.I /var/log/wtmp
database of past user logins
.SH "SEE ALSO"
.BR wtmp (5)