updwtmpx (3)
Leading comments
Copyright 1997 Nicolás Lichtmaier <nick@debian.org> Created Wed Jul 2 23:27:34 ART 1997 %%%LICENSE_START(GPLv2+_DOC_FULL) This is free documentation; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. The GNU General Public License's references to "object code" and "executables" are to be interpreted as the output of any document form...
NAME
updwtmp, logwtmp - append an entry to the wtmp fileSYNOPSIS
#include <utmp.h> void updwtmp(const char *wtmp_file, const struct utmp *ut);
void logwtmp(const char *line, const char *name, const char *host);
For logwtmp(), link with -lutil.
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 wtmp file.
FILES
- /var/log/wtmp
- database of past user logins
ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7).| Interface | Attribute | Value |
|
updwtmp(),
logwtmp() | Thread safety | MT-Unsafe sig:ALRM timer |
CONFORMING TO
Not in POSIX.1. Present on Solaris, NetBSD, and perhaps other systems.NOTES
For consistency with the other "utmpx" functions (see getutxent(3)), glibc provides (since version 2.1):#include <utmpx.h> void updwtmpx (const char *wtmpx_file, const struct utmpx *utx);
This function performs the same task as updwtmp(), but differs in that it takes a utmpx structure as its last argument.