a3e230d1fa
Add fortify_source support for openat(). This change requires that an argument be supplied when using O_CREAT. Fix unnecessary call to __open_2. If, at compile time, we know that "flags" is constant and DOESN'T contain O_CREAT, the call to __open_2 is useless. Change-Id: Ifcd29c4fb25e25656961d7552d672e161f0cfdbd
67 lines
2.1 KiB
C
67 lines
2.1 KiB
C
/*
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* Copyright (C) 2008 The Android Open Source Project
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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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* * 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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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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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
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* 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 <unistd.h>
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#include <fcntl.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#include <private/logd.h>
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extern int __openat(int, const char*, int, int);
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int openat(int fd, const char *pathname, int flags, ...)
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{
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mode_t mode = 0;
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flags |= O_LARGEFILE;
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if (flags & O_CREAT)
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{
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va_list args;
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va_start(args, flags);
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mode = (mode_t) va_arg(args, int);
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va_end(args);
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}
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return __openat(fd, pathname, flags, mode);
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}
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int __openat_2(int fd, const char *pathname, int flags)
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{
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if (flags & O_CREAT) {
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__libc_android_log_print(ANDROID_LOG_FATAL, "libc",
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"*** openat(O_CREAT) called without specifying a mode ***\n");
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abort();
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}
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flags |= O_LARGEFILE;
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return __openat(fd, pathname, flags, 0);
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}
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