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fs: Fix incorrect size report on 32bit machines (#1699)

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Cast before multiplication to avoid overflow.

Fixes #743
This commit is contained in:
Kazufumi NOTO 2019-03-19 02:16:42 +09:00 committed by Patrick Ziegler
parent 5995a8dace
commit 82b9ea8a09
1 changed files with 3 additions and 3 deletions
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6
src/modules/fs.cpp
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@ -97,10 +97,10 @@ namespace modules {
mount->fsname = details->at(MOUNTINFO_FSNAME);
// see: http://en.cppreference.com/w/cpp/filesystem/space
mount->bytes_total = buffer.f_frsize * buffer.f_blocks;
mount->bytes_free = buffer.f_frsize * buffer.f_bfree;
mount->bytes_total = static_cast<uint64_t>(buffer.f_frsize) * static_cast<uint64_t>(buffer.f_blocks);
mount->bytes_free = static_cast<uint64_t>(buffer.f_frsize) * static_cast<uint64_t>(buffer.f_bfree);
mount->bytes_used = mount->bytes_total - mount->bytes_free;
mount->bytes_avail = buffer.f_frsize * buffer.f_bavail;
mount->bytes_avail = static_cast<uint64_t>(buffer.f_frsize) * static_cast<uint64_t>(buffer.f_bavail);
mount->percentage_free = math_util::percentage<double>(mount->bytes_avail, mount->bytes_used + mount->bytes_avail);
mount->percentage_used = math_util::percentage<double>(mount->bytes_used, mount->bytes_used + mount->bytes_avail);