// Given the networks & addresses of the source and destination filesystems,
// this will connect to them and return a *CowFS ready to use them. (or an
// error)
func Mount(netSrc, addrSrc, netDst, addrDst string, user ninep.User) (*CowFS, error) {
// the empty string here (and below) is the aname - which subtree to
// connect to. right now we're just punting on providing a nice interface
// to this. you get the whole tree.
src, err := clnt.Mount(netSrc, addrSrc, "", user)
if err != nil {
return nil, fmt.Errorf("Error connecting to source fs : %s\n", err)
}
dst, err := clnt.Mount(netDst, addrDst, "", user)
if err != nil {
src.Unmount()
return nil, fmt.Errorf("Error connecting to destination fs : %s\n", err)
}
return &CowFS{src: src, dst: dst}, nil
}
// Connect to a 9P server that is listening at `addr',
// and wrap ctl and data files of a remote serial device
// into a Port.
// Basename is the a file name prefix or directory,
// where the device is expected to be found. It can
// be "", if ctl and data files live in the 9P servers
// root directory
func Connect9P(addr, basename string) (port Port, err error) {
c, err := clnt.Mount("tcp", addr, "", user.Current())
if err != nil {
return
}
d := new(dev9)
d.clnt = c
if d.data, err = d.clnt.FOpen(basename+"/data", p.ORDWR); err == nil {
if d.ctl, err = d.clnt.FOpen(basename+"/ctl", p.OWRITE); err != nil {
goto noctl
}
} else if d.data, err = d.clnt.FOpen(basename, p.ORDWR); err == nil {
if d.ctl, err = d.clnt.FOpen(basename+"ctl", p.OWRITE); err != nil {
goto noctl
}
} else {
goto unmount
}
port = d
return
noctl:
d.data.Close()
unmount:
d.clnt.Unmount()
return
}
func main() {
var n int
var user p.User
var err error
var c *clnt.Clnt
var file *clnt.File
var buf []byte
flag.Parse()
user = p.OsUsers.Uid2User(os.Geteuid())
clnt.DefaultDebuglevel = *debuglevel
c, err = clnt.Mount("tcp", *addr, "", user)
if err != nil {
goto error
}
if flag.NArg() != 1 {
log.Println("invalid arguments")
return
}
file, err = c.FOpen(flag.Arg(0), p.OREAD)
if err != nil {
goto error
}
buf = make([]byte, 8192)
for {
n, err = file.Read(buf)
if n == 0 {
break
}
os.Stdout.Write(buf[0:n])
}
file.Close()
if err != nil && err != io.EOF {
goto error
}
return
error:
log.Println("Error", err)
}
func main() {
var user p.User
var err error
var c *clnt.Clnt
var file *clnt.File
var d []*p.Dir
flag.Parse()
user = p.OsUsers.Uid2User(os.Geteuid())
clnt.DefaultDebuglevel = *debuglevel
c, err = clnt.Mount("tcp", *addr, "", user)
if err != nil {
log.Fatal(err)
}
lsarg := "/"
if flag.NArg() == 1 {
lsarg = flag.Arg(0)
} else if flag.NArg() > 1 {
log.Fatal("error: only one argument expected")
}
file, err = c.FOpen(lsarg, p.OREAD)
if err != nil {
log.Fatal(err)
}
for {
d, err = file.Readdir(0)
if d == nil || len(d) == 0 || err != nil {
break
}
for i := 0; i < len(d); i++ {
os.Stdout.WriteString(d[i].Name + "\n")
}
}
file.Close()
if err != nil && err != io.EOF {
log.Fatal(err)
}
return
}
func main() {
var user p.User
var ba [][]byte
var nreqs int
var rchan chan *clnt.Req
var tag *clnt.Tag
var fid *clnt.Fid
var wnames []string
flag.Parse()
user = p.OsUsers.Uid2User(os.Geteuid())
clnt.DefaultDebuglevel = *debuglevel
c, err := clnt.Mount("tcp", *addr, "", user)
if err != nil {
goto error
}
if flag.NArg() != 1 {
log.Println("invalid arguments")
return
}
ba = make([][]byte, 100)
for i := 0; i < len(ba); i++ {
ba[i] = make([]byte, 8192)
}
nreqs = 0
rchan = make(chan *clnt.Req)
tag = c.TagAlloc(rchan)
// walk the file
wnames = strings.Split(flag.Arg(0), "/")
for wnames[0] == "" {
wnames = wnames[1:]
}
fid = c.FidAlloc()
for root := c.Root; len(wnames) > 0; root = fid {
n := len(wnames)
if n > 8 {
n = 8
}
err = tag.Walk(root, fid, wnames[0:n])
if err != nil {
goto error
}
nreqs++
wnames = wnames[n:]
}
err = tag.Open(fid, p.OREAD)
if err != nil {
goto error
}
for i := 0; i < len(ba); i++ {
err = tag.Read(fid, uint64(i*8192), 8192)
if err != nil {
goto error
}
nreqs++
}
err = tag.Clunk(fid)
// now start reading...
for nreqs > 0 {
r := <-rchan
if r.Tc.Type == p.Tread {
i := r.Tc.Offset / 8192
copy(ba[i], r.Rc.Data)
ba[i] = ba[i][0:r.Rc.Count]
}
nreqs--
}
for i := 0; i < len(ba); i++ {
os.Stdout.Write(ba[i])
}
return
error:
log.Println("error: ", err)
}
