Originální popis anglicky:
updwtmp, logwtmp - append an entry to the wtmp file
Návod, kniha: Linux Programmer's Manual
#include <utmp.h>
void updwtmp(const char *wtmp_file, const struct utmp *ut);
void logwtmp(const char *line, const char *name, const char *host);
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.
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.)
- /var/log/wtmp
- database of past user logins
wtmp(5)
