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