How to call shell script function in my Perl?

Question

I have some functions in util.sh, I want to call function in util.sh and get the return value. Does anyone know how to do?

util.sh

#!/bin/bash
sayhello()
{
    echo $1 "hello"
}

I try to call the function in terminal using the command as below, but got the output "can not found the command sayhello":

sh /home/adnrew/code/test/util.sh sayhello test

and using the code in my perl as below,

$returnvalue = system("/home/adnrew/code/test/util.sh sayhello test ");

can not work too.

How can I call shell script function in my Perl?

For doing it out of a Perl script, see answers to this question — zdim
– zdim, Commented Jan 14, 2020 at 6:34

Zzyzx · Accepted Answer · 2020-01-14 03:12:51Z

2

You could source the shell script into the subprocess by

$returnvalue = system(". /home/adnrew/code/test/util.sh; sayhello test");

The parent process (a bash shell, or a perl system subprocess) creates a child bash process when it tries executing a bash shell. Anything defined in the script are thus limited only to the child process and will not reflect in the parent process itself. Sourcing a script (the 'dot' command or just source), on the other hand, runs the definition in the same bash process.

edited Jan 14, 2020 at 3:12

answered Jan 14, 2020 at 3:05

Zzyzx

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2 Comments

georgetovrea Over a year ago

yes it's can get the return value , but also return a code '0' , is it can not to return the code '0' ??

zdim Over a year ago

@georgetovrea The system returns a 0 when all is well. If the return is non-zero then that number packs some info about what went wrong. So zero is good :) See documentation at the link

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