popen and cin

[sam]

Hi,

I try to use popen execute scp, when the user finish password, it will
return to the cin input prompt, but the problem is popen does not wait
for user finish typing up the password before displaying the cin input
prompt. As a result, the scp password input prompt does not receive any
input from user.

Here is few lines from the code:

popen("/usr/bin/scp /tmp/test [email protected]:~/", "w");
string commandline;
cout << endl << "User Prompt>>";
getline(cin, commandline, '\n');

Do I need to change popen to something else? or need to write my own
popen function to deal with the process waiting?

Thanks
Sam

 

[Artie Gold]

Hi,

I try to use popen execute scp, when the user finish password, it will

popen() is not a standard C++ function, so you're off topic here...

return to the cin input prompt, but the problem is popen does not wait
for user finish typing up the password before displaying the cin input
prompt. As a result, the scp password input prompt does not receive any
input from user.

Here is few lines from the code:

popen("/usr/bin/scp /tmp/test [email protected]:~/", "w");

....and this line is nonsensical in any case (as you're throwing away the
result of the call -- which is all it's good for)...

string commandline;
cout << endl << "User Prompt>>";
getline(cin, commandline, '\n');

Do I need to change popen to something else? or need to write my own
popen function to deal with the process waiting?

Thanks
Sam

HTH,
--ag