98 lines
2.7 KiB
C
98 lines
2.7 KiB
C
/*****************************************************************************
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*
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* $Id$
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* Purpose ...............: MBSE BBS Shadow Password Suite
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* Original Source .......: Shadow Password Suite
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* Original Copyright ....: Julianne Frances Haugh and others.
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*
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*****************************************************************************
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* Copyright (C) 1997-2001
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*
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* Michiel Broek FIDO: 2:280/2802
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* Beekmansbos 10
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* 1971 BV IJmuiden
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* the Netherlands
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*
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* This file is part of MBSE BBS.
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*
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* This BBS is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2, or (at your option) any
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* later version.
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*
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* MBSE BBS is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with MBSE BBS; see the file COPYING. If not, write to the Free
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* Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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*****************************************************************************/
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#include "../config.h"
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#include <sys/types.h>
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#include <unistd.h>
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#include <pwd.h>
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#include <fcntl.h>
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#include <time.h>
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#include "mblogin.h"
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#include <utmp.h>
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#include "log.h"
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/*
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* dolastlog - create lastlog entry
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*
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* A "last login" entry is created for the user being logged in. The
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* UID is extracted from the global (struct passwd) entry and the
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* TTY information is gotten from the (struct utmp).
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*/
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void dolastlog(struct lastlog *ll, const struct passwd *pw, const char *line, const char *host)
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{
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int fd;
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off_t offset;
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struct lastlog newlog;
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/*
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* If the file does not exist, don't create it.
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*/
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if ((fd = open(LASTLOG_FILE, O_RDWR)) == -1)
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return;
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/*
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* The file is indexed by UID number. Seek to the record
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* for this UID. Negative UID's will create problems, but ...
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*/
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offset = (unsigned long) pw->pw_uid * sizeof newlog;
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if (lseek(fd, offset, SEEK_SET) != offset) {
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close(fd);
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return;
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}
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/*
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* Read the old entry so we can tell the user when they last
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* logged in. Then construct the new entry and write it out
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* the way we read the old one in.
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*/
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if (read(fd, (char *) &newlog, sizeof newlog) != sizeof newlog)
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memzero(&newlog, sizeof newlog);
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if (ll)
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*ll = newlog;
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time(&newlog.ll_time);
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strncpy(newlog.ll_line, line, sizeof newlog.ll_line);
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#ifdef HAVE_LL_HOST
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strncpy(newlog.ll_host, host, sizeof newlog.ll_host);
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#endif
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if (lseek(fd, offset, SEEK_SET) == offset)
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write(fd, (char *) &newlog, sizeof newlog);
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close(fd);
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}
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