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Diffstat (limited to 'toolkit/crashreporter/google-breakpad/src/common/android/testing/mkdtemp.h')
-rw-r--r-- | toolkit/crashreporter/google-breakpad/src/common/android/testing/mkdtemp.h | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/toolkit/crashreporter/google-breakpad/src/common/android/testing/mkdtemp.h b/toolkit/crashreporter/google-breakpad/src/common/android/testing/mkdtemp.h new file mode 100644 index 000000000..b86e2cd78 --- /dev/null +++ b/toolkit/crashreporter/google-breakpad/src/common/android/testing/mkdtemp.h @@ -0,0 +1,110 @@ +// 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 |