blob: 8405234d214ccd3183f0d5c7b5b226555cf0d41e [file] [log] [blame]
#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