Scripting
 

How do i send input to program?

such as i call

dummyprogram

and it outputs

enter dummyname:


how would i send a name into the prorgam?

thanks

Please, be more specific.

What do you really want? Do you want to write your own C program which gets user's input,
Or a bash script, or do you just want to redirect something from the terminal to a program (using a |)...?

thanks

echo "yourName" | dummyprogram

basically im calling an program that accepts two inputs

such as

./dummy
output: enter dummy first name
output: enter dummy last name

.

i want to write a script to do that for me

what i got so far

#!/usr/bin/expect --

spawn calldummy -someoptions
expect "*"
send "firstname\r"
expect "*"
send "lastname\r"

but the stuff doesnt seem to pass through properly

thanks

it would be even better if i can do it in c

if it was in C, something like this doesnt work for me

system("dummy -options");
system("firstname");
system("lastname");

any tips please?

echo -e "firstinput\nsecondInput\n" | ./dummyprogram

echo -e "firstinput\nsecondInput\n" | ./dummyprogram

isnt working

i tried /r and /r/n

the program i am running is passwd . as in "passwd username"

im getting a password do not match . but i ebelieve the input goes through

any tips

thanks so far

any help guys? please . thanks.

And you think that piece of information wasn't deserving to be mentioned sooner ?

Depending the O/S you are running, and you failed to mention that too, passwd is picky about from where its input is coming.

However, expect is handling passwd properly so you should keep on searching that way.

ahhh i see

im running debian linux

so i should keep trying expect?

check the man page of your passwd program whether there's a --stdin option. Think you can give it a try if there is.

i have no --stdin option

is it possible somehow to do it in C then? call the passwd and change the password?

i can of course write directly to /etc/passwd and /etc/shadow but i want to avoid that and use the passwd command if possible

No need to use C, I told you you can use expect.