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log: close log file before calling truncate on windows

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If you truncate an open file in Windows, access is denied.
   how about close the file before truncation?
This commit is contained in:
kukugi 2020-01-14 18:10:59 +09:00
parent e9e69d6e29
commit c4fb2d89b1
1 changed files with 8 additions and 1 deletions
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9
log/handler.go
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@ -125,7 +125,14 @@ func prepFile(path string) (*countingWriter, error) {
return nil, err
}
ns := fi.Size() - cut
if err = f.Truncate(ns); err != nil {
if err := f.Close(); err != nil {
return nil, err
}
if err = os.Truncate(path, ns); err != nil {
return nil, err
}
f, err = os.OpenFile(path, os.O_RDWR|os.O_APPEND, 0600)
if err != nil {
return nil, err
}
return &countingWriter{w: f, count: uint(ns)}, nil