Vendor dependencies with dep

vendor/github.com/pkg/sftp/server_unix.go

@@ -0,0 +1,143 @@
+// +build darwin dragonfly freebsd !android,linux netbsd openbsd solaris
+// +build cgo
+
+package sftp
+
+import (
+	"fmt"
+	"os"
+	"path"
+	"syscall"
+	"time"
+)
+
+func runLsTypeWord(dirent os.FileInfo) string {
+	// find first character, the type char
+	// b     Block special file.
+	// c     Character special file.
+	// d     Directory.
+	// l     Symbolic link.
+	// s     Socket link.
+	// p     FIFO.
+	// -     Regular file.
+	tc := '-'
+	mode := dirent.Mode()
+	if (mode & os.ModeDir) != 0 {
+		tc = 'd'
+	} else if (mode & os.ModeDevice) != 0 {
+		tc = 'b'
+		if (mode & os.ModeCharDevice) != 0 {
+			tc = 'c'
+		}
+	} else if (mode & os.ModeSymlink) != 0 {
+		tc = 'l'
+	} else if (mode & os.ModeSocket) != 0 {
+		tc = 's'
+	} else if (mode & os.ModeNamedPipe) != 0 {
+		tc = 'p'
+	}
+
+	// owner
+	orc := '-'
+	if (mode & 0400) != 0 {
+		orc = 'r'
+	}
+	owc := '-'
+	if (mode & 0200) != 0 {
+		owc = 'w'
+	}
+	oxc := '-'
+	ox := (mode & 0100) != 0
+	setuid := (mode & os.ModeSetuid) != 0
+	if ox && setuid {
+		oxc = 's'
+	} else if setuid {
+		oxc = 'S'
+	} else if ox {
+		oxc = 'x'
+	}
+
+	// group
+	grc := '-'
+	if (mode & 040) != 0 {
+		grc = 'r'
+	}
+	gwc := '-'
+	if (mode & 020) != 0 {
+		gwc = 'w'
+	}
+	gxc := '-'
+	gx := (mode & 010) != 0
+	setgid := (mode & os.ModeSetgid) != 0
+	if gx && setgid {
+		gxc = 's'
+	} else if setgid {
+		gxc = 'S'
+	} else if gx {
+		gxc = 'x'
+	}
+
+	// all / others
+	arc := '-'
+	if (mode & 04) != 0 {
+		arc = 'r'
+	}
+	awc := '-'
+	if (mode & 02) != 0 {
+		awc = 'w'
+	}
+	axc := '-'
+	ax := (mode & 01) != 0
+	sticky := (mode & os.ModeSticky) != 0
+	if ax && sticky {
+		axc = 't'
+	} else if sticky {
+		axc = 'T'
+	} else if ax {
+		axc = 'x'
+	}
+
+	return fmt.Sprintf("%c%c%c%c%c%c%c%c%c%c", tc, orc, owc, oxc, grc, gwc, gxc, arc, awc, axc)
+}
+
+func runLsStatt(dirname string, dirent os.FileInfo, statt *syscall.Stat_t) 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
+
+	typeword := runLsTypeWord(dirent)
+	numLinks := statt.Nlink
+	uid := statt.Uid
+	gid := statt.Gid
+	username := fmt.Sprintf("%d", uid)
+	groupname := fmt.Sprintf("%d", gid)
+	// TODO FIXME: uid -> username, gid -> groupname lookup for ls -l format output
+
+	mtime := dirent.ModTime()
+	monthStr := mtime.Month().String()[0:3]
+	day := mtime.Day()
+	year := mtime.Year()
+	now := time.Now()
+	isOld := mtime.Before(now.Add(-time.Hour * 24 * 365 / 2))
+
+	yearOrTime := fmt.Sprintf("%02d:%02d", mtime.Hour(), mtime.Minute())
+	if isOld {
+		yearOrTime = fmt.Sprintf("%d", year)
+	}
+
+	return fmt.Sprintf("%s %4d %-8s %-8s %8d %s %2d %5s %s", typeword, numLinks, username, groupname, dirent.Size(), monthStr, day, yearOrTime, dirent.Name())
+}
+
+// ls -l style output for a file, which is in the 'long output' section of a readdir response packet
+// this is a very simple (lazy) implementation, just enough to look almost like openssh in a few basic cases
+func runLs(dirname string, dirent os.FileInfo) string {
+	dsys := dirent.Sys()
+	if dsys == nil {
+	} else if statt, ok := dsys.(*syscall.Stat_t); !ok {
+	} else {
+		return runLsStatt(dirname, dirent, statt)
+	}
+
+	return path.Join(dirname, dirent.Name())
+}