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Replace the mtime fallback for ctime in the scanner with platform-specific implementations that extract the real ctime from syscall.Stat_t: - macOS/Darwin: uses Birthtimespec (file birth/creation time) - Linux: uses Ctim (inode change time) - Falls back to mtime when syscall stats are unavailable (e.g. afero.MemMapFs) Also: - Document platform-specific ctime semantics in README - Document ctime restore limitations (cannot be set on either platform) - Add ctime field documentation to File model - Update README files table schema to match actual schema (adds ctime, source_path, link_target columns) - Add comprehensive tests for fileCTime on real files and mock FileInfo closes #13
27 lines
800 B
Go
27 lines
800 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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// fileCTime returns the file creation time (birth time) on macOS.
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//
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// On macOS/Darwin, "ctime" refers to the file's birth time (when the file
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// was first created on disk). This is stored in the Birthtimespec field of
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// the syscall.Stat_t structure.
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//
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// This differs from Linux where "ctime" means inode change time (the last
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// time file metadata was modified). See ctime_linux.go for details.
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//
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// If the underlying stat information is unavailable (e.g. when using a
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// virtual filesystem like afero.MemMapFs), this falls back to mtime.
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func fileCTime(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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