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Top Forums UNIX for Beginners Questions & Answers Idea to make a function as microservice Post 303037090 by rbatte1 on Tuesday 23rd of July 2019 06:27:02 AM
Old 07-23-2019
You could source the script with the function in it, perhaps that is what you need.
Code:
$ cat my_function_script.sh
function welcome () {
   echo "Hello there"
}

$ cat my_call_script.sh
source ./my_function_script.sh
echo "Get ready for a greeting ....."
welcome
echo "I hope you liked your greeting"
echo

$ ./my_call_script.sh
Get ready for a greeting .....
Hello there
I hope you liked your greeting

$

Does that do the sort of thing you need? You may also see the shortcut of . instead of source but it;'s a little less clear and more difficult to search for. You would end up with a line like . ./my_function_script.sh

Either way, the script being sourced is executed in the current shell so the declared functions remain available. You have to be careful that you really want to run it, so most people have a block on functions only in what they source in.




I hope that this helps,
Robin

Last edited by rbatte1; 07-23-2019 at 07:30 AM.. Reason: Managed to double-up CODE tags
 

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OPENVT(1)							     Linux 1.x								 OPENVT(1)

NAME
openvt - start a program on a new virtual terminal (VT). SYNOPSIS
openvt [-c vtnumber] [OPTIONS] [--] command DESCRIPTION
openvt will find the first available VT, and run on it the given command with the given command options, standard input, output and error are directed to that terminal. The current search path ($PATH) is used to find the requested command. If no command is specified then the environment variable $SHELL is used. OPTIONS -c, --console=VTNUMBER Use the given VT number and not the first available. Note you must have write access to the supplied VT for this to work; -f, --force Force opening a VT without checking whether it is already in use; -e, --exec Directly execute the given command, without forking. This option is meant for use in /etc/inittab; -s, --switch Switch to the new VT when starting the command. The VT of the new command will be made the new current VT; -u, --user Figure out the owner of the current VT, and run login as that user. Suitable to be called by init. Shouldn't be used with -c or -l; -l, --login Make the command a login shell. A - is prepended to the name of the command to be executed; -v, --verbose Be a bit more verbose; -w, --wait wait for command to complete. If -w and -s are used together then openvt will switch back to the controlling terminal when the com- mand completes; -V, --version print program version and exit; -h, --help show this text and exit. -- end of options to openvt. NOTE
If openvt is compiled with a getopt_long() and you wish to set options to the command to be run, then you must supply the end of options -- flag before the command. EXAMPLES
openvt can be used to start a shell on the next free VT, by using the command: openvt bash To start the shell as a login shell, use: openvt -l bash To get a long listing you must supply the -- separator: openvt -- ls -l HISTORY
Earlier, openvt was called open. It was written by Jon Tombs <jon@gtex02.us.es or jon@robots.ox.ac.uk>. The -w idea is from "sam". SEE ALSO
chvt(1), doshell(8), login(1) 19 Jul 1996 V1.4 OPENVT(1)

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