/* 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); } }