mirror of https://github.com/pkg/sftp.git
80 lines
1.8 KiB
Go
80 lines
1.8 KiB
Go
// +build darwin dragonfly freebsd !android,linux netbsd openbsd solaris aix
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// +build cgo
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package sftp
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import (
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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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"syscall"
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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 formatID(id uint32) string {
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return strconv.FormatUint(uint64(id), 10)
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}
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func getUsername(uid uint32) string {
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id := formatID(uid)
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u, err := user.LookupId(id)
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if err != nil {
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return id
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}
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return u.Username
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}
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func getGroupName(gid uint32) string {
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id := formatID(gid)
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g, err := user.LookupGroupId(id)
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if err != nil {
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return id
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}
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return g.Name
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}
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// ls -l style output for a file, which is in the 'long output' section of a readdir response packet
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// this is a very simple (lazy) implementation, just enough to look almost like openssh in a few basic cases
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func runLs(dirname string, 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 := 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 *syscall.Stat_t:
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uid = getUsername(sys.Uid)
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gid = getGroupName(sys.Gid)
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case *sshfx.Attributes:
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uid = formatID(sys.UID)
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gid = formatID(sys.GID)
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case *FileStat:
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uid = formatID(sys.UID)
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gid = formatID(sys.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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