On 6/21/05, remi.chateauneu@gmx.de <remi.chateauneu@gmx.de> wrote:
I am, thanks in advance ! If this implementation is not deemed to go with Boost, why not a new project on Sourceforge ? I may try to port it to Solaris, if you wish to.
Thomas Matelich wrote:
On 6/21/05, Steve Hartmann <steven_hartmann@yahoo.com> wrote:
Hello all,
I was browsing boost to find some portable means for getting file system statistics such as file system (disk) size, free space, etc. I kind of expected to see this in the boost filesystem library, but they don't appear to be there. Doesn't even seem to be in the "Do-list".
Am I missing something? Looking in the wrong place?
I've got an implementation (independent of FileSystem) that works on windows, hp and linux (others I'm sure, but I don't use them) if anyone's interested.
Its really not that complicated. just a wrapper around statfs on unix and GetDiskFreeSpaceEx on windows. Its not terribly long, I'll post it (copied from a longer .cpp file, sorry if I miss an include). #ifndef _WIN32 #include <sys/vfs.h> #else #include <winsock2.h> // I don't want winsock.h included ever #include <Windows.h> #endif #include <boost/cstdint.hpp> namespace { bool getDeviceStuff(std::string const& path, boost::intmax_t& num_bytes, boost::intmax_t& available_bytes) { if(path.empty()) { //ZLOG("diskspace") << "Cannot get device info for empty directory path" << std::endl; return false; } #ifndef _WIN32 struct statfs buf; if(statfs(path.c_str(), &buf) < 0) { //ZLOG("diskspace") << "statfs failed. " << strerror(errno) << std::endl; return false; } //ZLOG("diskspace") << " f_blocks=" << buf.f_blocks << " f_bsize=" << buf.f_bsize << " f_bavail=" << buf.f_bavail << std::endl; num_bytes = buf.f_blocks * buf.f_bsize; available_bytes = buf.f_bavail * buf.f_bsize; #else __int64 freebytestocaller, totalbytes, freebytes; if(!GetDiskFreeSpaceEx (path.c_str(), (PULARGE_INTEGER)&freebytestocaller, (PULARGE_INTEGER)&totalbytes, (PULARGE_INTEGER)&freebytes)) { LPVOID lpMsgBuf; FormatMessage( FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, NULL, GetLastError(), MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language (LPTSTR) &lpMsgBuf, 0, NULL ); //ZLOG("diskspace") << "GetDiskFreeSpaceEx failed: " << GetLastError() << " - " << (LPCTSTR)lpMsgBuf << std::endl; LocalFree( lpMsgBuf ); return false; } num_bytes = totalbytes; available_bytes = freebytestocaller; #endif return true; } } double XPlat::getDeviceFreeSpace(std::string const& path) { boost::intmax_t num_bytes, available_bytes; if(!getDeviceStuff(path, num_bytes, available_bytes)) return -1.0; double retval = double(available_bytes) / (1 << 20); //ZLOG("diskspace") << retval << " meg free for " << path << std::endl; return retval; } double XPlat::getDeviceFreePercent(std::string const& path) { boost::intmax_t num_bytes, available_bytes; if(!getDeviceStuff(path, num_bytes, available_bytes)) return -1.0; double retval = (double(available_bytes) / num_bytes) * 100.0; //ZLOG("diskspace") << retval << " {(double(" << available_bytes << ") / " << num_bytes << ") * 100.0} percent free for " << path << std::endl; return retval; }