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/*
* Copyright (C) 2008 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <string.h>
#include <stdio.h>
#include <utmp.h>
void pututline(struct utmp* utmp)
{
FILE* f;
struct utmp u;
long i;
if (!(f = fopen(_PATH_UTMP, "w+")))
return;
while (fread(&u, sizeof(struct utmp), 1, f) == 1)
{
if (!strncmp(utmp->ut_line, u.ut_line, sizeof(u.ut_line) -1))
{
if ((i = ftell(f)) < 0)
goto ret;
if (fseek(f, i - sizeof(struct utmp), SEEK_SET) < 0)
goto ret;
fwrite(utmp, sizeof(struct utmp), 1, f);
goto ret;
}
}
fclose(f);
if (!(f = fopen(_PATH_UTMP, "w+")))
return;
fwrite(utmp, sizeof(struct utmp), 1, f);
ret:
fclose(f);
}
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