101 lines
3.1 KiB
C
101 lines
3.1 KiB
C
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/*
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* Copyright 1989 - 1994, Julianne Frances Haugh
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of Julianne F. Haugh nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY JULIE HAUGH AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL JULIE HAUGH OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <config.h>
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#include "rcsid.h"
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RCSID("$Id: log.c,v 1.5 1998/04/16 19:57:44 marekm Exp $")
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#include <sys/types.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 "defines.h"
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#if HAVE_LASTLOG_H
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#include <lastlog.h>
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#else
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#include "lastlog_.h"
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#endif
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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
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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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#if 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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