1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/toolkit/crashreporter/google-breakpad/src/common/android/testing/mkdtemp.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,103 @@
1.4 +// Copyright (c) 2012, Google Inc.
1.5 +// All rights reserved.
1.6 +//
1.7 +// Redistribution and use in source and binary forms, with or without
1.8 +// modification, are permitted provided that the following conditions are
1.9 +// met:
1.10 +//
1.11 +// * Redistributions of source code must retain the above copyright
1.12 +// notice, this list of conditions and the following disclaimer.
1.13 +// * Redistributions in binary form must reproduce the above
1.14 +// copyright notice, this list of conditions and the following disclaimer
1.15 +// in the documentation and/or other materials provided with the
1.16 +// distribution.
1.17 +// * Neither the name of Google Inc. nor the names of its
1.18 +// contributors may be used to endorse or promote products derived from
1.19 +// this software without specific prior written permission.
1.20 +//
1.21 +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
1.22 +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
1.23 +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
1.24 +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
1.25 +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
1.26 +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
1.27 +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
1.28 +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
1.29 +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
1.30 +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
1.31 +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1.32 +
1.33 +// Android doesn't provide mkdtemp(). Keep this implementation in an
1.34 +// C++ anonymous namespace to avoid conflicts on Chromium (which
1.35 +// already provides an extern "C" mkdtemp function).
1.36 +//
1.37 +// The reason this is inlined here is to avoid linking a new object file
1.38 +// into each unit test program (i.e. keep build files simple).
1.39 +
1.40 +#ifndef GOOGLE_BREAKPAD_COMMON_ANDROID_TESTING_MKDTEMP_H
1.41 +#define GOOGLE_BREAKPAD_COMMON_ANDROID_TESTING_MKDTEMP_H
1.42 +
1.43 +#include <assert.h>
1.44 +#include <errno.h>
1.45 +#include <stdlib.h>
1.46 +#include <stdio.h>
1.47 +#include <string.h>
1.48 +#include <sys/stat.h>
1.49 +
1.50 +namespace {
1.51 +
1.52 +char* mkdtemp(char* path) {
1.53 + if (path == NULL) {
1.54 + errno = EINVAL;
1.55 + return NULL;
1.56 + }
1.57 +
1.58 + // 'path' must be terminated with six 'X'
1.59 + const char kSuffix[] = "XXXXXX";
1.60 + const size_t kSuffixLen = strlen(kSuffix);
1.61 + char* path_end = path + strlen(path);
1.62 +
1.63 + if (static_cast<size_t>(path_end - path) < kSuffixLen ||
1.64 + memcmp(path_end - kSuffixLen, kSuffix, kSuffixLen) != 0) {
1.65 + errno = EINVAL;
1.66 + return NULL;
1.67 + }
1.68 +
1.69 + // If 'path' contains a directory separator, check that it exists to
1.70 + // avoid looping later.
1.71 + char* sep = strrchr(path, '/');
1.72 + if (sep != NULL) {
1.73 + struct stat st;
1.74 + int ret;
1.75 + *sep = '\0'; // temporarily zero-terminate the dirname.
1.76 + ret = stat(path, &st);
1.77 + *sep = '/'; // restore full path.
1.78 + if (ret < 0)
1.79 + return NULL;
1.80 + if (!S_ISDIR(st.st_mode)) {
1.81 + errno = ENOTDIR;
1.82 + return NULL;
1.83 + }
1.84 + }
1.85 +
1.86 + // Loop. On each iteration, replace the XXXXXX suffix with a random
1.87 + // number.
1.88 + int tries;
1.89 + for (tries = 128; tries > 0; tries--) {
1.90 + int random = rand() % 1000000;
1.91 +
1.92 + snprintf(path_end - kSuffixLen, kSuffixLen + 1, "%0d", random);
1.93 + if (mkdir(path, 0700) == 0)
1.94 + return path; // Success
1.95 +
1.96 + if (errno != EEXIST)
1.97 + return NULL;
1.98 + }
1.99 +
1.100 + assert(errno == EEXIST);
1.101 + return NULL;
1.102 +}
1.103 +
1.104 +} // namespace
1.105 +
1.106 +#endif // GOOGLE_BREAKPAD_COMMON_ANDROID_TESTING_MKDTEMP_H
