// Copyright (c) 2011, 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. // file_utils.cc: Implement utility functions for file manipulation. // See file_utils.h for details. #include <fcntl.h> #include <stdio.h> #include <string.h> #include <sys/stat.h> #include <unistd.h> #include "common/linux/eintr_wrapper.h" #include "common/tests/file_utils.h" namespace google_breakpad { bool CopyFile(const char* from_path, const char* to_path) { int infile = HANDLE_EINTR(open(from_path, O_RDONLY)); if (infile < 0) { perror("open"); return false; } int outfile = HANDLE_EINTR(creat(to_path, 0666)); if (outfile < 0) { perror("creat"); if (HANDLE_EINTR(close(infile)) < 0) { perror("close"); } return false; } char buffer[1024]; bool result = true; while (result) { ssize_t bytes_read = HANDLE_EINTR(read(infile, buffer, sizeof(buffer))); if (bytes_read < 0) { perror("read"); result = false; break; } if (bytes_read == 0) break; ssize_t bytes_written_per_read = 0; do { ssize_t bytes_written_partial = HANDLE_EINTR(write( outfile, &buffer[bytes_written_per_read], bytes_read - bytes_written_per_read)); if (bytes_written_partial < 0) { perror("write"); result = false; break; } bytes_written_per_read += bytes_written_partial; } while (bytes_written_per_read < bytes_read); } if (HANDLE_EINTR(close(infile)) == -1) { perror("close"); result = false; } if (HANDLE_EINTR(close(outfile)) == -1) { perror("close"); result = false; } return result; } bool ReadFile(const char* path, void* buffer, ssize_t* buffer_size) { int fd = HANDLE_EINTR(open(path, O_RDONLY)); if (fd == -1) { perror("open"); return false; } bool ok = true; if (buffer && buffer_size && *buffer_size > 0) { memset(buffer, 0, sizeof(*buffer_size)); *buffer_size = HANDLE_EINTR(read(fd, buffer, *buffer_size)); if (*buffer_size == -1) { perror("read"); ok = false; } } if (HANDLE_EINTR(close(fd)) == -1) { perror("close"); ok = false; } return ok; } bool WriteFile(const char* path, const void* buffer, size_t buffer_size) { int fd = HANDLE_EINTR(open(path, O_CREAT | O_TRUNC | O_WRONLY, S_IRWXU)); if (fd == -1) { perror("open"); return false; } bool ok = true; if (buffer) { size_t bytes_written_total = 0; ssize_t bytes_written_partial = 0; const char* data = reinterpret_cast<const char*>(buffer); while (bytes_written_total < buffer_size) { bytes_written_partial = HANDLE_EINTR(write(fd, data + bytes_written_total, buffer_size - bytes_written_total)); if (bytes_written_partial < 0) { perror("write"); ok = false; break; } bytes_written_total += bytes_written_partial; } } if (HANDLE_EINTR(close(fd)) == -1) { perror("close"); ok = false; } return ok; } } // namespace google_breakpad