UPDWTMP Section: Linux Programmer's Manual (3) Updated: July 2, 2025 Index   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 glibc1 or libc. However, logwtmp() occurs in the old libbsd.   FILES /var/log/wtmp  database of past user logins   SEE ALSO   Index NAME SYNOPSIS DESCRIPTION AVAILABILITY FILES SEE ALSO This document was created by using the manual pages. Time: 11:58:07 GMT, March 24, 2025