`Write` is not power safe

[doanac]

jsonfile/jsonfile.go

Line 95 in 699d1da

_, err = f.Write(b)

I think you need an f.Sync() called before you do a Close. The write/close operations on Linux can be down async while the os.Rename is synchronous. A really inconveniently timed power failure can result in the Rename operation pointing at garbage.