c7302b61ef
Files with no license use the default 3-clauses BSD license. The copyright were mostly not recorded; they were updated according to the Changelog. "Julianne Frances Haugh and contributors" changed to "copyright holders and contributors".
113 lines
2.9 KiB
C
113 lines
2.9 KiB
C
/*
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* Copyright (c) 1993 - 1994, Julianne Frances Haugh
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* Copyright (c) 1996 - 1998, Marek Michałkiewicz
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* Copyright (c) 2005 , Tomasz Kłoczko
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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. The name of the copyright holders or contributors may not be used to
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* endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <config.h>
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#ifndef HAVE_GETUTENT
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#include "defines.h"
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#include <stdio.h>
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#include <fcntl.h>
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#include <utmp.h>
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#ifndef lint
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static char rcsid[] = "$Id$";
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#endif
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static int utmp_fd = -1;
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static struct utmp utmp_buf;
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/*
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* setutent - open or rewind the utmp file
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*/
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void setutent (void)
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{
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if (utmp_fd == -1)
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if ((utmp_fd = open (_UTMP_FILE, O_RDWR)) == -1)
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utmp_fd = open (_UTMP_FILE, O_RDONLY);
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if (utmp_fd != -1)
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lseek (utmp_fd, (off_t) 0L, SEEK_SET);
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}
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/*
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* endutent - close the utmp file
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*/
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void endutent (void)
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{
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if (utmp_fd != -1)
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close (utmp_fd);
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utmp_fd = -1;
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}
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/*
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* getutent - get the next record from the utmp file
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*/
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struct utmp *getutent (void)
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{
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if (utmp_fd == -1)
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setutent ();
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if (utmp_fd == -1)
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return 0;
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if (read (utmp_fd, &utmp_buf, sizeof utmp_buf) != sizeof utmp_buf)
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return 0;
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return &utmp_buf;
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}
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/*
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* getutline - get the utmp entry matching ut_line
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*/
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struct utmp *getutline (const struct utmp *utent)
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{
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struct utmp save;
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struct utmp *new;
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save = *utent;
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while (new = getutent ())
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if (strncmp (new->ut_line, save.ut_line, sizeof new->ut_line))
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continue;
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else
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return new;
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return (struct utmp *) 0;
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}
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#else
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extern int errno; /* warning: ANSI C forbids an empty source file */
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#endif
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