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/* $OpenBSD: logwtmp.c,v 1.10 2016/08/30 14:44:45 guenther Exp $ */ |
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/* |
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* Copyright (c) 1988, 1993 |
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* The Regents of the University of California. 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 the University 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 THE REGENTS 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 THE REGENTS 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 <sys/types.h> |
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#include <sys/time.h> |
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#include <sys/stat.h> |
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#include <fcntl.h> |
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#include <string.h> |
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#include <unistd.h> |
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#include <utmp.h> |
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#include "util.h" |
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void |
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logwtmp(const char *line, const char *name, const char *host) |
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{ |
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struct stat buf; |
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struct utmp ut; |
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int fd; |
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if ((fd = open(_PATH_WTMP, O_WRONLY|O_APPEND|O_CLOEXEC)) < 0) |
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return; |
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if (fstat(fd, &buf) == 0) { |
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(void) strncpy(ut.ut_line, line, sizeof(ut.ut_line)); |
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(void) strncpy(ut.ut_name, name, sizeof(ut.ut_name)); |
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(void) strncpy(ut.ut_host, host, sizeof(ut.ut_host)); |
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(void) time(&ut.ut_time); |
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if (write(fd, &ut, sizeof(struct utmp)) != |
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sizeof(struct utmp)) |
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(void) ftruncate(fd, buf.st_size); |
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} |
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(void) close(fd); |
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} |