glibc/login/logwtmp.c

45 lines
1.4 KiB
C

/* Copyright (C) 1996-2020 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <string.h>
#include <sys/time.h>
#include <time.h>
#include <unistd.h>
#include <utmp.h>
void
logwtmp (const char *line, const char *name, const char *host)
{
struct utmp ut;
/* Set information in new entry. */
memset (&ut, 0, sizeof (ut));
ut.ut_pid = getpid ();
ut.ut_type = name[0] ? USER_PROCESS : DEAD_PROCESS;
strncpy (ut.ut_line, line, sizeof ut.ut_line);
strncpy (ut.ut_name, name, sizeof ut.ut_name);
strncpy (ut.ut_host, host, sizeof ut.ut_host);
struct timespec ts;
__clock_gettime (CLOCK_REALTIME, &ts);
TIMESPEC_TO_TIMEVAL (&ut.ut_tv, &ts);
updwtmp (_PATH_WTMP, &ut);
}