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Top Forums Shell Programming and Scripting How to pass arguments to an interactive script? Post 302885531 by progkcp on Monday 27th of January 2014 08:51:12 AM
Old 01-27-2014
How to pass arguments to an interactive script?

I've tried to find a solution to this, but I"m stumped.

OS - RH Linux 5.9

I have a bash script <myProgram.sh> that gets executed manually and creates a small response file. I'm trying to automate the running of this script.

When myProgram.sh runs, it prompts the user to enter 2 pieces of information.

For the first input the user is told to hit Enter for is a line feed.

The second input is [Y]es.

Example:

Code:
./myProgram.sh

First prompt:
Press Enter to Continue

Second prompt:
Enter [Y]es, [N]o) [N]

I'd like to automate the execution of this script.


I figure that if I can do it from the command line, then I can script it.

Here is the closest that I've tried:

echo -e "\n" | ./emocmrsp

This seems to pass in a line feed, which answers the first prompt, but it doesn't pass anything to the second prompt.

So, I"m struggling with what to do for the second prompt.


I tried this but it didn't work.

This echos the linefeed "\n" for the first prompt, but fails for the second prompt.

echo -e "\n" "Y\n" | ./emocmrsp


([Y]es, [N]o) [N]: Invalid value specified.


Any suggestions?

Last edited by Corona688; 01-27-2014 at 02:28 PM..
 

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SCRIPT(1)						    BSD General Commands Manual 						 SCRIPT(1)

NAME
script -- make typescript of terminal session SYNOPSIS
script [-a] [-c COMMAND] [-e] [-f] [-q] [-t] [file] DESCRIPTION
Script makes a typescript of everything printed on your terminal. It is useful for students who need a hardcopy record of an interactive session as proof of an assignment, as the typescript file can be printed out later with lpr(1). If the argument file is given, script saves all dialogue in file. If no file name is given, the typescript is saved in the file typescript. Options: -a Append the output to file or typescript, retaining the prior contents. -c COMMAND Run the COMMAND rather than an interactive shell. This makes it easy for a script to capture the output of a program that behaves differently when its stdout is not a tty. -e Return the exit code of the child process. Uses the same format as bash termination on signal termination exit code is 128+n. -f Flush output after each write. This is nice for telecooperation: One person does `mkfifo foo; script -f foo' and another can super- vise real-time what is being done using `cat foo'. -q Be quiet. -t Output timing data to standard error. This data contains two fields, separated by a space. The first field indicates how much time elapsed since the previous output. The second field indicates how many characters were output this time. This information can be used to replay typescripts with realistic typing and output delays. The script ends when the forked shell exits (a control-D to exit the Bourne shell (sh(1)), and exit, logout or control-d (if ignoreeof is not set) for the C-shell, csh(1)). Certain interactive commands, such as vi(1), create garbage in the typescript file. Script works best with commands that do not manipulate the screen, the results are meant to emulate a hardcopy terminal. ENVIRONMENT
The following environment variable is utilized by script: SHELL If the variable SHELL exists, the shell forked by script will be that shell. If SHELL is not set, the Bourne shell is assumed. (Most shells set this variable automatically). SEE ALSO
csh(1) (for the history mechanism), scriptreplay(1). HISTORY
The script command appeared in 3.0BSD. BUGS
Script places everything in the log file, including linefeeds and backspaces. This is not what the naive user expects. AVAILABILITY
The script command is part of the util-linux package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux/. Linux July 30, 2000 Linux
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