| // Copyright (c) 2012, Google Inc. |
| // 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. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived from |
| // this software without specific prior written permission. |
| // |
| // 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. |
| |
| // mkdtemp() wasn't declared in <stdlib.h> until NDK r9b due to a simple |
| // packaging bug (the function has always been implemented in all versions |
| // of the C library). This header is provided to build Breakpad with earlier |
| // NDK revisions (e.g. the one used by Chromium). It may be removed in the |
| // future once all major projects upgrade to use a more recent NDK. |
| // |
| // The reason this is inlined here is to avoid linking a new object file |
| // into each unit test program (i.e. keep build files simple). |
| |
| #ifndef GOOGLE_BREAKPAD_COMMON_ANDROID_TESTING_MKDTEMP_H |
| #define GOOGLE_BREAKPAD_COMMON_ANDROID_TESTING_MKDTEMP_H |
| |
| #include <assert.h> |
| #include <errno.h> |
| #include <stdlib.h> |
| #include <stdio.h> |
| #include <string.h> |
| #include <sys/stat.h> |
| |
| // Using a macro renaming trick here is necessary when building against |
| // NDK r9b. Otherwise the compiler will complain that calls to mkdtemp() |
| // are ambiguous. |
| #define mkdtemp breakpad_mkdtemp |
| |
| namespace { |
| |
| char* breakpad_mkdtemp(char* path) { |
| if (path == NULL) { |
| errno = EINVAL; |
| return NULL; |
| } |
| |
| // 'path' must be terminated with six 'X' |
| const char kSuffix[] = "XXXXXX"; |
| const size_t kSuffixLen = strlen(kSuffix); |
| char* path_end = path + strlen(path); |
| |
| if (static_cast<size_t>(path_end - path) < kSuffixLen || |
| memcmp(path_end - kSuffixLen, kSuffix, kSuffixLen) != 0) { |
| errno = EINVAL; |
| return NULL; |
| } |
| |
| // If 'path' contains a directory separator, check that it exists to |
| // avoid looping later. |
| char* sep = strrchr(path, '/'); |
| if (sep != NULL) { |
| struct stat st; |
| int ret; |
| *sep = '\0'; // temporarily zero-terminate the dirname. |
| ret = stat(path, &st); |
| *sep = '/'; // restore full path. |
| if (ret < 0) |
| return NULL; |
| if (!S_ISDIR(st.st_mode)) { |
| errno = ENOTDIR; |
| return NULL; |
| } |
| } |
| |
| // Loop. On each iteration, replace the XXXXXX suffix with a random |
| // number. |
| int tries; |
| for (tries = 128; tries > 0; tries--) { |
| int random = rand() % 1000000; |
| |
| snprintf(path_end - kSuffixLen, kSuffixLen + 1, "%0d", random); |
| if (mkdir(path, 0700) == 0) |
| return path; // Success |
| |
| if (errno != EEXIST) |
| return NULL; |
| } |
| |
| assert(errno == EEXIST); |
| return NULL; |
| } |
| |
| } // namespace |
| |
| #endif // GOOGLE_BREAKPAD_COMMON_ANDROID_TESTING_MKDTEMP_H |