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R=digit at https://breakpad.appspot.com/524002/ git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@1110 4c0a9323-5329-0410-9bdc-e9ce6186880e
104 lines
3.4 KiB
C
104 lines
3.4 KiB
C
// Copyright (c) 2012, Google Inc.
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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 are
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// met:
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//
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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
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without 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
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER 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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// Android doesn't provide mkdtemp(). Keep this implementation in an
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// C++ anonymous namespace to avoid conflicts on Chromium (which
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// already provides an extern "C" mkdtemp function).
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//
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// The reason this is inlined here is to avoid linking a new object file
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// into each unit test program (i.e. keep build files simple).
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#ifndef GOOGLE_BREAKPAD_COMMON_ANDROID_TESTING_MKDTEMP_H
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#define GOOGLE_BREAKPAD_COMMON_ANDROID_TESTING_MKDTEMP_H
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#include <assert.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/stat.h>
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namespace {
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char* mkdtemp(char* path) {
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if (path == NULL) {
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errno = EINVAL;
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return NULL;
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}
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// 'path' must be terminated with six 'X'
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const char kSuffix[] = "XXXXXX";
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const size_t kSuffixLen = strlen(kSuffix);
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char* path_end = path + strlen(path);
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if (static_cast<size_t>(path_end - path) < kSuffixLen ||
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memcmp(path_end - kSuffixLen, kSuffix, kSuffixLen) != 0) {
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errno = EINVAL;
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return NULL;
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}
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// If 'path' contains a directory separator, check that it exists to
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// avoid looping later.
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char* sep = strrchr(path, '/');
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if (sep != NULL) {
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struct stat st;
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int ret;
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*sep = '\0'; // temporarily zero-terminate the dirname.
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ret = stat(path, &st);
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*sep = '/'; // restore full path.
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if (ret < 0)
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return NULL;
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if (!S_ISDIR(st.st_mode)) {
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errno = ENOTDIR;
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return NULL;
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}
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}
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// Loop. On each iteration, replace the XXXXXX suffix with a random
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// number.
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int tries;
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for (tries = 128; tries > 0; tries--) {
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int random = rand() % 1000000;
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snprintf(path_end - kSuffixLen, kSuffixLen + 1, "%0d", random);
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if (mkdir(path, 0700) == 0)
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return path; // Success
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if (errno != EEXIST)
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return NULL;
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}
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assert(errno == EEXIST);
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return NULL;
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}
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} // namespace
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#endif // GOOGLE_BREAKPAD_COMMON_ANDROID_TESTING_MKDTEMP_H
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