mirror of https://github.com/pkg/sftp.git
144 lines
3.2 KiB
Go
144 lines
3.2 KiB
Go
// +build darwin dragonfly freebsd !android,linux netbsd openbsd solaris
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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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"path"
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"syscall"
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"time"
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)
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func runLsTypeWord(dirent os.FileInfo) string {
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// find first character, the type char
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// b Block special file.
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// c Character special file.
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// d Directory.
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// l Symbolic link.
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// s Socket link.
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// p FIFO.
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// - Regular file.
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tc := '-'
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mode := dirent.Mode()
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if (mode & os.ModeDir) != 0 {
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tc = 'd'
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} else if (mode & os.ModeDevice) != 0 {
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tc = 'b'
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if (mode & os.ModeCharDevice) != 0 {
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tc = 'c'
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}
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} else if (mode & os.ModeSymlink) != 0 {
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tc = 'l'
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} else if (mode & os.ModeSocket) != 0 {
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tc = 's'
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} else if (mode & os.ModeNamedPipe) != 0 {
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tc = 'p'
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}
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// owner
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orc := '-'
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if (mode & 0400) != 0 {
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orc = 'r'
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}
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owc := '-'
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if (mode & 0200) != 0 {
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owc = 'w'
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}
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oxc := '-'
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ox := (mode & 0100) != 0
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setuid := (mode & os.ModeSetuid) != 0
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if ox && setuid {
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oxc = 's'
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} else if setuid {
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oxc = 'S'
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} else if ox {
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oxc = 'x'
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}
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// group
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grc := '-'
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if (mode & 040) != 0 {
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grc = 'r'
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}
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gwc := '-'
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if (mode & 020) != 0 {
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gwc = 'w'
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}
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gxc := '-'
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gx := (mode & 010) != 0
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setgid := (mode & os.ModeSetgid) != 0
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if gx && setgid {
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gxc = 's'
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} else if setgid {
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gxc = 'S'
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} else if gx {
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gxc = 'x'
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}
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// all / others
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arc := '-'
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if (mode & 04) != 0 {
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arc = 'r'
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}
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awc := '-'
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if (mode & 02) != 0 {
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awc = 'w'
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}
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axc := '-'
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ax := (mode & 01) != 0
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sticky := (mode & os.ModeSticky) != 0
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if ax && sticky {
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axc = 't'
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} else if sticky {
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axc = 'T'
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} else if ax {
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axc = 'x'
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}
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return fmt.Sprintf("%c%c%c%c%c%c%c%c%c%c", tc, orc, owc, oxc, grc, gwc, gxc, arc, awc, axc)
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}
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func runLsStatt(dirname string, dirent os.FileInfo, statt *syscall.Stat_t) 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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typeword := runLsTypeWord(dirent)
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numLinks := statt.Nlink
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uid := statt.Uid
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gid := statt.Gid
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username := fmt.Sprintf("%d", uid)
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groupname := fmt.Sprintf("%d", gid)
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// TODO FIXME: uid -> username, gid -> groupname lookup for ls -l format output
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mtime := dirent.ModTime()
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monthStr := mtime.Month().String()[0:3]
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day := mtime.Day()
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year := mtime.Year()
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now := time.Now()
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isOld := mtime.Before(now.Add(-time.Hour * 24 * 365 / 2))
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yearOrTime := fmt.Sprintf("%02d:%02d", mtime.Hour(), mtime.Minute())
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if isOld {
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yearOrTime = fmt.Sprintf("%d", year)
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}
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return fmt.Sprintf("%s %4d %-8s %-8s %8d %s %2d %5s %s", typeword, numLinks, username, groupname, dirent.Size(), monthStr, day, yearOrTime, dirent.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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dsys := dirent.Sys()
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if dsys == nil {
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} else if statt, ok := dsys.(*syscall.Stat_t); !ok {
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} else {
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return runLsStatt(dirname, dirent, statt)
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}
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return path.Join(dirname, dirent.Name())
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}
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