42 lines
950 B
Go
42 lines
950 B
Go
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//go:build darwin || freebsd || linux
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// +build darwin freebsd linux
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package fs
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import (
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"time"
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"golang.org/x/sys/unix"
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)
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func modKey(path string) (ModKey, error) {
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stat := unix.Stat_t{}
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if err := unix.Stat(path, &stat); err != nil {
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return ModKey{}, err
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}
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// We can't detect changes if the file system zeros out the modification time
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if stat.Mtim.Sec == 0 && stat.Mtim.Nsec == 0 {
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return ModKey{}, modKeyUnusable
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}
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// Don't generate a modification key if the file is too new
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now, err := unix.TimeToTimespec(time.Now())
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if err != nil {
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return ModKey{}, err
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}
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mtimeSec := stat.Mtim.Sec + modKeySafetyGap
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if mtimeSec > now.Sec || (mtimeSec == now.Sec && stat.Mtim.Nsec > now.Nsec) {
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return ModKey{}, modKeyUnusable
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}
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return ModKey{
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inode: stat.Ino,
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size: stat.Size,
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mtime_sec: int64(stat.Mtim.Sec),
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mtime_nsec: int64(stat.Mtim.Nsec),
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mode: uint32(stat.Mode),
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uid: stat.Uid,
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}, nil
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}
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