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/* Copyright (C) 1996, 1997 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 Library 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 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <string.h>
#include <sys/time.h>
#include <time.h>
#include <unistd.h>
#include <fcntl.h>
#include <utmp.h>
void logwtmp (const char *line, const char *name, const char *host)
{
struct utmp ut;
struct flock lock;
int ut_fd;
/* Set information in new entry. */
memset (&ut, 0, sizeof (ut));
#if _HAVE_UT_PID - 0
ut.ut_pid = getpid ();
#endif
#if _HAVE_UT_TYPE - 0
ut.ut_type = name[0] ? USER_PROCESS : DEAD_PROCESS;
#endif
strncpy (ut.ut_line, line, sizeof ut.ut_line);
strncpy (ut.ut_name, name, sizeof ut.ut_name);
#if _HAVE_UT_HOST - 0
strncpy (ut.ut_host, host, sizeof ut.ut_host);
#endif
#if _HAVE_UT_TV - 0
__gettimeofday (&ut.ut_tv, NULL);
#else
time (&ut.ut_time);
#endif
/* updwtmp (_PATH_WTMP, &ut); */
/* from tinylogin */
if ((ut_fd = open(_PATH_WTMP, O_APPEND | O_WRONLY)) >= 0) {
/* Lock the utmp file before updating */
lock.l_type = F_WRLCK;
lock.l_whence = SEEK_SET;
lock.l_start = 0;
lock.l_len = 0;
if (fcntl(ut_fd, F_SETLK, &lock) >= 0) {
write(ut_fd, (void *) &ut, sizeof(ut));
/* Now unlock the utmp file */
lock.l_type = F_UNLCK;
}
close(ut_fd);
}
}
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