53c4c8abb0
AFAICT, all of these were added prior to the new-style FORTIFY going
in. Because clang saw two definitions of the "same" function, it got
upset. (e.g. 35d937e4eb)
Now that our FORTIFY functions are overloads of their library functions,
these undefs can be removed.
(This is a step toward making FORTIFY a library with -U_FORTIFY_SOURCE
on it, as requested in the bug.)
Bug: 12231437
Test: CtsBionicUnitTests. No new failures.
Change-Id: I844ff77106ee2bea72ae1cd0bb85d146939ecd05
79 lines
2.7 KiB
C++
79 lines
2.7 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 <errno.h>
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#include <malloc.h>
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#include <string.h>
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#include <unistd.h>
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extern "C" int __getcwd(char* buf, size_t size);
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char* getcwd(char* buf, size_t size) __overloadable {
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// You can't specify size 0 unless you're asking us to allocate for you.
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if (buf != NULL && size == 0) {
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errno = EINVAL;
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return NULL;
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}
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// Allocate a buffer if necessary.
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char* allocated_buf = NULL;
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size_t allocated_size = size;
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if (buf == NULL) {
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if (size == 0) {
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// The Linux kernel won't return more than a page, so translate size 0 to 4KiB.
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// TODO: if we need to support paths longer than that, we'll have to walk the tree ourselves.
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allocated_size = getpagesize();
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}
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buf = allocated_buf = static_cast<char*>(malloc(allocated_size));
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if (buf == NULL) {
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// malloc should set errno, but valgrind's malloc wrapper doesn't.
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errno = ENOMEM;
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return NULL;
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}
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}
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// Ask the kernel to fill our buffer.
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int rc = __getcwd(buf, allocated_size);
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if (rc == -1) {
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free(allocated_buf);
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// __getcwd set errno.
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return NULL;
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}
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// If we allocated a whole page, only return as large an allocation as necessary.
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if (allocated_buf != NULL) {
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if (size == 0) {
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buf = strdup(allocated_buf);
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free(allocated_buf);
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} else {
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buf = allocated_buf;
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}
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}
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return buf;
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}
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