I tested the program on both Linux and Mac, and the behavior is
consistent. Makes sense, Looks like an expected behavior. Thanks.
Just paste the program as below,
package main
import (
"fmt"
"os"
)
func main() {
f, err := os.OpenFile("/tmp/db", os.O_RDWR | os.O_CREATE, 0666)
if err != nil {
panic(err)
}
if n, err := f.Write([]byte{1, 2, 3, 4, 5}); err != nil || n != 5 {
panic (err)
}
if n, err := f.Write([]byte{6, 7, 8}); err != nil || n != 3 {
panic (err)
}
if err := f.Sync(); err != nil {
panic (err)
}
if err := f.Close(); err != nil {
panic(err)
}
fmt.Println("Done!")
}
在2021年12月8日星期三 UTC+8 16:13:31<Brian Candler> 写道：
> As a general request, please don't post screen images. They are very hard
> to read, especially for (but not exclusively for) those with visual
> impairment. They also can't be copy-pasted.
>
> You haven't said what platform you are running on. However if this is
> Linux or another POSIX-compatible system, it's perfectly fine to delete a
> file while it's open. The file remains on disk until the last process
> which has an open file handle has closed it.
>
> You can demonstrate this quite easily:
> - create a large (multi-gigabyte) file
> - check the filesystem free space
> - open the file
> - delete it
> - check the filesystem free space
> - close it
> - check the filesystem free space
>
> Only after closing the file will the free space be returned to the
> filesystem.
>
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