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Home > Archive > Unix Programming > September 2007 > redirect stdin/stdout from program started by execv
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redirect stdin/stdout from program started by execv
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| Hello!
I want to control remote application using ssh. I know, how to redirect
stdin/stdout from ssh started by execv. The problem is that remote
application requires pseudo-terminal to work, but
when I'm trying to run ssh from execv with "-t", it says:
Pseudo-terminal will not be allocated because stdin is not a terminal
How can I convince ssh, that it is connected to pty ?
Thanks in advance
Jarek
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| Scott Lurndal 2007-09-21, 7:22 pm |
| Jarek <jarek@poczta.srv.pl> writes:
>Hello!
>
> I want to control remote application using ssh. I know, how to redirect
>stdin/stdout from ssh started by execv. The problem is that remote
>application requires pseudo-terminal to work, but
>when I'm trying to run ssh from execv with "-t", it says:
>
>Pseudo-terminal will not be allocated because stdin is not a terminal
>
>How can I convince ssh, that it is connected to pty ?
>
>Thanks in advance
>
>Jarek
create the pty yourself and attach it to fd 0/1/2 before execing ssh.
scott
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| Peter J. Holzer 2007-09-22, 1:17 pm |
| On 2007-09-21 21:21, Jarek <jarek@poczta.srv.pl> wrote:
> I want to control remote application using ssh. I know, how to redirect
> stdin/stdout from ssh started by execv. The problem is that remote
> application requires pseudo-terminal to work, but
> when I'm trying to run ssh from execv with "-t", it says:
>
> Pseudo-terminal will not be allocated because stdin is not a terminal
>
> How can I convince ssh, that it is connected to pty ?
Read the manual:
-t Force pseudo-tty allocation. This can be used to execute arbi‐
trary screen-based programs on a remote machine, which can be
very useful, e.g., when implementing menu services. Multiple -t
options force tty allocation, even if ssh has no local tty.
hp
--
_ | Peter J. Holzer | I know I'd be respectful of a pirate
|_|_) | Sysadmin WSR | with an emu on his shoulder.
| | | hjp@hjp.at |
__/ | http://www.hjp.at/ | -- Sam in "Freefall"
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