running SCP as a process

[Richard Gaskin]

Without seeing the actual SCP code it's hard to determine the source of 
the problem, but I suspect it's because SCP is designed to prevent 
allowing passwords to be included as plain text in shell scripts, since 
that would obviate the "S" in "SCP".

The solution seems to be setting up shared keys instead of passwords for 
shell access, which has been tricky for me but given the great many 
tutorials all over the Web the problem seems to be less with shared keys 
than my own attempting it pre-coffee.

Of course it would be far better to just have SFTP in libURL, since then 
we could use it on every supported platform, even Windows.

But in the meantime, where SCP can be an acceptable workaround for the 
absence of SFTP you'll want to set up shared-key authentication.

<https://www.google.com/webhp#q=setting+up+shared+keys+for+SSH+on+OS+X>

Let me know which tutorial you found especially helpful for that, as 
I'll need it soon myself.  If I get to it before then I'll pass along 
the URL.

-- 
  Richard Gaskin
  Fourth World Systems
  Software Design and Development for the Desktop, Mobile, and the Web
  ____________________________________________________________________
  Ambassador at FourthWorld.com                http://www.FourthWorld.com



On 1/4/14 11:09 PM, Phil Davis wrote:
 > Hi folks,
 >
 > I'm trying to upload a file to a server using scp. It works fine from
 > Terminal (Mac), but fails when run as a process in LC.
 >
 > In my LC script, the 'verbose' output from scp tells me:
 > - the connection was established
 > - it was authenticated with RSA key
 >
 > but something happens at password time. From the scp output:
 >
 > debug1: Next authentication method: password
 > debug1: read_passphrase: can't open /dev/tty: Device not configured
 > debug1: Authentications that can continue: publickey,password
 > Permission denied, please try again.
 > debug1: read_passphrase: can't open /dev/tty: Device not configured
 > debug1: Authentications that can continue: publickey,password
 > Permission denied, please try again.
 > debug1: read_passphrase: can't open /dev/tty: Device not configured
 > debug1: Authentications that can continue: publickey,password
 > debug1: No more authentication methods to try.
 > Permission denied (publickey,password).
 > lost connection
 > --- CLOSED ---
 >
 >
 > Here is my script:
 >
 > -- in the 'start' button --
 >
 > on mouseUp
 >      try
 >          close process (fld "command")
 >          wait until fld "command" is not among the lines of the
 > openProcesses
 >      end try
 >
 >      open process (fld "command") for update
 >      readThisProcess
 > end mouseUp
 >
 >
 >
 > -- in the stack script --
 >
 > command readThisProcess
 >      read from process (fld "command") for 1 line
 >      if it = empty then
 >          send "closeThisProcess" to me in 1 tick
 >          exit readThisProcess
 >      end if
 >
 >      put it after fld "status"
 >      set the vScroll of fld "status" to the formattedHeight of fld 
"status"
 >      if it contains "password:" then write "<myActualPassword>" & CR to
 > process (fld "command")
 >      send "readThisProcess" to me in 1 tick
 > end readThisProcess
 >
 >
 > command closeThisProcess
 >      close process (fld "command")
 >      put "--- CLOSED ---" after fld "status"
 > end closeThisProcess
 >
 >
 > --------------
 >
 > It doesn't seem to like the way I'm writing the password to the process,
 > so I tried it with and without a CR on the end. I'm in unfamiliar
 > territory. Seems to me dev/tty shouldn't be getting involved, but maybe
 > I'm wrong.
 >
 > Any insights you can offer will be greatly appreciated!
 >
 > Thanks -
 >