diff options
Diffstat (limited to 'login/login.c')
| -rw-r--r-- | login/login.c | 148 |
1 files changed, 93 insertions, 55 deletions
diff --git a/login/login.c b/login/login.c index 5b71082..f74ce41 100644 --- a/login/login.c +++ b/login/login.c @@ -1,63 +1,101 @@ -/* - * Copyright (c) 1988, 1993 - * The Regents of the University of California. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by the University of - * California, Berkeley and its contributors. - * 4. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#if defined(LIBC_SCCS) && !defined(lint) -static char sccsid[] = "@(#)login.c 8.1 (Berkeley) 6/4/93"; -#endif /* LIBC_SCCS and not lint */ - -#include <sys/types.h> - -#include <fcntl.h> +/* Copyright (C) 1996 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 <errno.h> +#include <limits.h> +#include <string.h> #include <unistd.h> -#include <stdlib.h> #include <utmp.h> -#include <stdio.h> + void -login(ut) - const struct utmp *ut; +login (const struct utmp *ut) { - register int fd; - int tty; - - tty = ttyslot(); - if (tty > 0 && (fd = open(_PATH_UTMP, O_WRONLY|O_CREAT, 0644)) >= 0) { - (void)lseek(fd, (off_t)(tty * sizeof(struct utmp)), L_SET); - (void)write(fd, ut, sizeof(struct utmp)); - (void)close(fd); + char tty[PATH_MAX + UT_LINESIZE]; + int found_tty; + const char *ttyp; + struct utmp_data data; + + /* Seek tty. */ + found_tty = ttyname_r (STDIN_FILENO, tty, sizeof tty); + if (found_tty < 0) + found_tty = ttyname_r (STDOUT_FILENO, tty, sizeof tty); + if (found_tty < 0) + found_tty = ttyname_r (STDERR_FILENO, tty, sizeof tty); + + if (found_tty >= 0) + { + /* Tell that we want to use the UTMP file. */ + if (utmpname (_PATH_UTMP) != 0) + { + struct utmp tmp; + struct utmp *old; + + /* Open UTMP file. */ + setutent_r (&data); + + /* We only want to insert the name of the tty without path. */ + ttyp = basename (tty); + + /* Position to record for this tty. */ +#if _HAVE_UT_TYPE - 0 + tmp.ut_type = USER_PROCESS; +#endif + strncpy (tmp.ut_line, ttyp, UT_LINESIZE); + + /* Read the record. */ + if (getutline_r (&tmp, &old, &data) >= 0 || errno == ESRCH) + { +#if _HAVE_UT_TYPE - 0 + /* We have to fake the old entry because this `login' + function does not fit well into the UTMP file + handling scheme. */ + old->ut_type = ut->ut_type; +#endif + pututline_r (ut, &data); + } + + /* Close UTMP file. */ + endutent_r (&data); } - if ((fd = open(_PATH_WTMP, O_WRONLY|O_APPEND, 0)) >= 0) { - (void)write(fd, ut, sizeof(struct utmp)); - (void)close(fd); + } + + /* Update the WTMP file. Here we have to add a new entry. */ + if (utmpname (_PATH_WTMP) != 0) + { + /* Open the WTMP file. */ + setutent_r (&data); + + /* Position at end of file. */ + data.loc_utmp = lseek (data.ut_fd, 0, SEEK_END); + if (data.loc_utmp != -1) + { +#if _HAVE_UT_TYPE - 0 + /* We have to fake the old entry because this `login' + function does not fit well into the UTMP file handling + scheme. */ + data.ubuf.ut_type = ut->ut_type; +#endif + pututline_r (ut, &data); } + + /* Close WTMP file. */ + endutent_r (&data); + } } |