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/* $OpenBSD: logout.c,v 1.9 2015/12/28 20:11:36 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 <fcntl.h> |
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#include <utmp.h> |
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#include <unistd.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include "util.h" |
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typedef struct utmp UTMP; |
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int |
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logout(const char *line) |
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{ |
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int fd, rval; |
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UTMP ut; |
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✗✓ |
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if ((fd = open(_PATH_UTMP, O_RDWR|O_CLOEXEC)) < 0) |
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return(0); |
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rval = 0; |
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✓✓ |
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while (read(fd, &ut, sizeof(UTMP)) == sizeof(UTMP)) { |
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✓✓✓✓
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if (!ut.ut_name[0] || strncmp(ut.ut_line, line, UT_LINESIZE)) |
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continue; |
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memset(ut.ut_name, 0, UT_NAMESIZE); |
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memset(ut.ut_host, 0, UT_HOSTSIZE); |
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(void)time(&ut.ut_time); |
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(void)lseek(fd, -(off_t)sizeof(UTMP), SEEK_CUR); |
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(void)write(fd, &ut, sizeof(UTMP)); |
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rval = 1; |
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} |
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(void)close(fd); |
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return(rval); |
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} |