How to return a value of a variable from shell script to perl script

Shell Programming and Scripting
1

HI ,
Is there any way to return a value of variable from shell to perl script.

Code:

Perl file
my $diff1=system("sh diff.sh");
my $diff2=system("sh diff1.sh");

I need exit status of below commands

i.e 0 and 1 respectively.

Since in both the cases diff is working so system command will return 0 .

diff1.sh
-------
a=diff aaa ccc
diff.sh
--------
b=diff aaa bbb

122 $> cat aaa
1hi hello
123 $> cat bbb
hi hello
125 $ cat ccc
1hi hello

120 $ diff aaa ccc
echo $?
0

diff aaa bbb
1c1
< 1hi hello
---
> hi hello
Exit 1

echo $?
1

If i'll use backtick it'll return the diff output like below:
1c1
< 1hi hello
---
> hi hello

But I need script to return a value like 1 if it finds any diffrence between two files and 0 if it doesnot find any diffrence between two files .

2

StdOut, StdErr - you can catch them.
Return code - a value which is 0 or !0. 0=SUCCESS, !0=FAILURE (according to POSIX). There are exceptions like diff. Return code should be between 0 and 127 but might be different.
There are other possibilities as well... google for inter-process communication.

3

Hi adderek ,
Thanks for the reply

Can you please help me to sort out this
I am running an application XXXX , and when it starts i am passing a file name called "connect.spb" and after the application connects to the server i am sending filename "accept.spb" as a parameter.

BL31DL385:$ ./XXXX

This is XXXX (Reproducer by Order or RelaY)

XXXX> @connect.spb

XXXX>Opening connect.spb

Script> SET TCPIP /LOCAL_PORT=15331
Initialised TCP Listener on BL31DL385 (port: 15331)

>@accept.spb

XXXX> Opening accept.spb

So basically Input parameters are @connect.spb and @accept.spb.
After getting first string application will connect to the client ,
Then wait for the input and when accept parameter is given communication established succesfully.

MyQuestion##can we automate this using a script which will first run the application XXXX, and then pass the connect.spb and accept.spb as input

4

Check "expect" utility. It should fit you.
This application XXXX seems to be something not designed for your purpose - since it lacks propper interface. Check if you can replace XXXX with something different.