sneak
18aa3a383d
check / check (push) Canceled after 0s
scan never records anything on a filesystem that is not persistent (tmpfs, proc, sysfs and the other kernel or memory-backed types). As it starts it notes the device ID of each such mount point, from /proc/self/mountinfo on Linux and the mounted-filesystem list on macOS, and checks every operand, directory and file the walk meets against them; no flag turns this off. Below an operand the walk also skips the default excludes, a path list per system (Linux, macOS, and Windows, which is not used yet), and --no-default-excludes turns off only those. A default exclude that is itself an operand gets no skip line. The tests stop at once, saying why, when TMPDIR is not on a persistent filesystem. Judgement call: an unreadable mount list fails the scan, and no flag gets round it. Judgement call: a file on such a filesystem below an operand gets the same line as a directory. Judgement call: an operand on such a filesystem that another operand's walk also reaches is named twice. Unverified: the macOS mount list is built for macOS but never run; bind mounts need root to test. Model: opus-5-5
33 lines
801 B
Go
33 lines
801 B
Go
//go:build darwin
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package main
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import "golang.org/x/sys/unix"
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// mountedFilesystems returns every mount point with the type of its
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// filesystem, from the system's list of mounted filesystems. Where one
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// filesystem is mounted over another, the later one in the list counts.
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func mountedFilesystems() (map[string]string, error) {
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// The first call counts the filesystems, the second lists them.
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n, err := unix.Getfsstat(nil, unix.MNT_NOWAIT)
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if err != nil {
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return nil, err
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}
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list := make([]unix.Statfs_t, n)
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n, err = unix.Getfsstat(list, unix.MNT_NOWAIT)
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if err != nil {
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return nil, err
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}
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mounts := make(map[string]string, n)
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for _, st := range list[:n] {
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mounts[unix.ByteSliceToString(st.Mntonname[:])] =
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unix.ByteSliceToString(st.Fstypename[:])
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}
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return mounts, nil
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}
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