89 lines
2.1 KiB
Go
89 lines
2.1 KiB
Go
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package sftp
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import (
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"errors"
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"fmt"
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"os"
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"os/user"
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"strconv"
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"time"
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sshfx "github.com/pkg/sftp/internal/encoding/ssh/filexfer"
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)
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func lsFormatID(id uint32) string {
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return strconv.FormatUint(uint64(id), 10)
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}
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type osIDLookup struct{}
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func (osIDLookup) Filelist(*Request) (ListerAt, error) {
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return nil, errors.New("unimplemented stub")
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}
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func (osIDLookup) LookupUserName(uid string) string {
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u, err := user.LookupId(uid)
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if err != nil {
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return uid
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}
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return u.Username
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}
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func (osIDLookup) LookupGroupName(gid string) string {
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g, err := user.LookupGroupId(gid)
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if err != nil {
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return gid
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}
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return g.Name
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}
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// runLs formats the FileInfo as per `ls -l` style, which is in the 'longname' field of a SSH_FXP_NAME entry.
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// This is a fairly simple implementation, just enough to look close to openssh in simple cases.
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func runLs(idLookup NameLookupFileLister, dirent os.FileInfo) string {
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// example from openssh sftp server:
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// crw-rw-rw- 1 root wheel 0 Jul 31 20:52 ttyvd
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// format:
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// {directory / char device / etc}{rwxrwxrwx} {number of links} owner group size month day [time (this year) | year (otherwise)] name
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symPerms := sshfx.FileMode(fromFileMode(dirent.Mode())).String()
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var numLinks uint64 = 1
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uid, gid := "0", "0"
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switch sys := dirent.Sys().(type) {
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case *sshfx.Attributes:
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uid = lsFormatID(sys.UID)
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gid = lsFormatID(sys.GID)
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case *FileStat:
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uid = lsFormatID(sys.UID)
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gid = lsFormatID(sys.GID)
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default:
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if fiExt, ok := dirent.(FileInfoUidGid); ok {
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uid = lsFormatID(fiExt.Uid())
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gid = lsFormatID(fiExt.Gid())
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break
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}
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numLinks, uid, gid = lsLinksUIDGID(dirent)
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}
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if idLookup != nil {
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uid, gid = idLookup.LookupUserName(uid), idLookup.LookupGroupName(gid)
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}
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mtime := dirent.ModTime()
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date := mtime.Format("Jan 2")
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var yearOrTime string
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if mtime.Before(time.Now().AddDate(0, -6, 0)) {
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yearOrTime = mtime.Format("2006")
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} else {
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yearOrTime = mtime.Format("15:04")
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}
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return fmt.Sprintf("%s %4d %-8s %-8s %8d %s %5s %s", symPerms, numLinks, uid, gid, dirent.Size(), date, yearOrTime, dirent.Name())
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}
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