updwtmp(3) -- Linux man page
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)
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