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The scanner was setting CTime to info.ModTime() as a placeholder since afero's FileInfo interface doesn't expose ctime directly. This change extracts the actual ctime from the underlying syscall.Stat_t via platform-specific build files: - macOS (Darwin): uses Birthtimespec (file creation/birth time) - Linux: uses Ctim (inode change time) - Other platforms: falls back to mtime Also adds: - Documentation of ctime semantics in README.md (new 'file metadata' section) - Platform differences table (macOS birth time vs Linux inode change time) - Note that ctime is recorded but not restored (not settable via standard APIs) - Updated README schema to match actual schema (adds ctime, source_path, link_target) - Doc comment on CTime field in database model closes #13
24 lines
697 B
Go
24 lines
697 B
Go
package snapshot
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import (
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"os"
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"syscall"
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"time"
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)
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// getCTime extracts the file creation time (birth time) from os.FileInfo.
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//
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// On macOS (Darwin), this returns the birth time (Birthtimespec) from the
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// underlying syscall.Stat_t. macOS HFS+ and APFS filesystems natively track
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// file creation time, making this a true "created at" timestamp.
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//
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// Falls back to modification time if the underlying Sys() data is not a
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// *syscall.Stat_t (e.g. when using in-memory filesystems for testing).
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func getCTime(info os.FileInfo) time.Time {
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stat, ok := info.Sys().(*syscall.Stat_t)
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if !ok {
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return info.ModTime()
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}
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return time.Unix(stat.Birthtimespec.Sec, stat.Birthtimespec.Nsec).UTC()
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}
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