| #include "temporary_file.hpp" |
| |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <unistd.h> |
| |
| #include <stdexcept> |
| |
| namespace openpower |
| { |
| namespace pels |
| { |
| namespace util |
| { |
| |
| TemporaryFile::TemporaryFile(const char* data, const uint32_t len) |
| { |
| // Build template path required by mkstemp() |
| std::string templatePath = |
| fs::temp_directory_path() / "phosphor-logging-XXXXXX"; |
| |
| // Generate unique file name, create file, and open it. The XXXXXX |
| // characters are replaced by mkstemp() to make the file name unique. |
| fd = mkostemp(templatePath.data(), O_RDWR); |
| if (fd == -1) |
| { |
| throw std::runtime_error{ |
| std::string{"Unable to create temporary file: "} + strerror(errno)}; |
| } |
| |
| // Update file with input Buffer data |
| auto rc = write(fd, data, len); |
| if (rc == -1) |
| { |
| // Delete temporary file. The destructor won't be called because the |
| // exception below causes this constructor to exit without completing. |
| remove(); |
| throw std::runtime_error{std::string{"Unable to update file: "} + |
| strerror(errno)}; |
| } |
| |
| // Store path to temporary file |
| path = templatePath; |
| } |
| |
| TemporaryFile& TemporaryFile::operator=(TemporaryFile&& file) |
| { |
| // Verify not assigning object to itself (a = std::move(a)) |
| if (this != &file) |
| { |
| // Delete temporary file owned by this object |
| remove(); |
| |
| // Move temporary file path from other object, transferring ownership |
| path = std::move(file.path); |
| |
| // Clear path in other object; after move path is in unspecified state |
| file.path.clear(); |
| } |
| return *this; |
| } |
| |
| void TemporaryFile::remove() |
| { |
| if (!path.empty()) |
| { |
| // Delete temporary file from file system |
| fs::remove(path); |
| |
| // Clear path to indicate file has been deleted |
| path.clear(); |
| } |
| } |
| |
| } // namespace util |
| } // namespace pels |
| } // namespace openpower |