mythcoreutil.cpp

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#include "mythcoreutil.h"
 
// POSIX
#include <unistd.h>
#include <fcntl.h>
 
// System specific C headers
#include "compat.h"
#include <QtGlobal>
 
#ifdef __linux__
#include <sys/vfs.h>
#include <sys/sysinfo.h>
#endif
 
#ifdef Q_OS_DARWIN
#include <mach/mach.h>
#endif
 
#ifdef BSD
#include <sys/mount.h>  // for struct statfs
#include <sys/sysctl.h>
#endif
 
// Qt headers
#include <QByteArray>
 
int64_t getDiskSpace(const QString &file_on_disk,
                     int64_t &total, int64_t &used)
{
    struct statfs statbuf {};
    int64_t freespace = -1;
    QByteArray cstr = file_on_disk.toLocal8Bit();
 
    total = used = -1;
 
    // there are cases where statfs will return 0 (good), but f_blocks and
    // others are invalid and set to 0 (such as when an automounted directory
    // is not mounted but still visible because --ghost was used),
    // so check to make sure we can have a total size > 0
    if ((statfs(cstr.constData(), &statbuf) == 0) &&
        (statbuf.f_blocks > 0) &&
        (statbuf.f_bsize > 0))
    {
        total      = statbuf.f_blocks;
        total     *= statbuf.f_bsize;
        total      = total >> 10;
 
        freespace  = statbuf.f_bavail;
        freespace *= statbuf.f_bsize;
        freespace  = freespace >> 10;
 
        used       = total - freespace;
    }
 
    return freespace;
}
 
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