mountinfo_bsd.go

Documentation: github.com/moby/sys/mountinfo

     1  //go:build freebsd || openbsd || darwin
     2  // +build freebsd openbsd darwin
     3  
     4  package mountinfo
     5  
     6  import "golang.org/x/sys/unix"
     7  
     8  // parseMountTable returns information about mounted filesystems
     9  func parseMountTable(filter FilterFunc) ([]*Info, error) {
    10  	count, err := unix.Getfsstat(nil, unix.MNT_WAIT)
    11  	if err != nil {
    12  		return nil, err
    13  	}
    14  
    15  	entries := make([]unix.Statfs_t, count)
    16  	_, err = unix.Getfsstat(entries, unix.MNT_WAIT)
    17  	if err != nil {
    18  		return nil, err
    19  	}
    20  
    21  	var out []*Info
    22  	for _, entry := range entries {
    23  		var skip, stop bool
    24  		mountinfo := getMountinfo(&entry)
    25  
    26  		if filter != nil {
    27  			// filter out entries we're not interested in
    28  			skip, stop = filter(mountinfo)
    29  			if skip {
    30  				continue
    31  			}
    32  		}
    33  
    34  		out = append(out, mountinfo)
    35  		if stop {
    36  			break
    37  		}
    38  	}
    39  	return out, nil
    40  }
    41  
    42  func mounted(path string) (bool, error) {
    43  	path, err := normalizePath(path)
    44  	if err != nil {
    45  		return false, err
    46  	}
    47  	// Fast path: compare st.st_dev fields.
    48  	// This should always work for FreeBSD and OpenBSD.
    49  	mounted, err := mountedByStat(path)
    50  	if err == nil {
    51  		return mounted, nil
    52  	}
    53  
    54  	// Fallback to parsing mountinfo
    55  	return mountedByMountinfo(path)
    56  }
    57
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