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Full Discussion: pass parameter back to calling program
Top Forums Shell Programming and Scripting pass parameter back to calling program Post 43468 by mbb on Tuesday 18th of November 2003 08:10:52 AM
Old 11-18-2003
You can use the exit command to pass back an error number. e.g. exit 56

This value is passed back into the calling shell and can be examined in the built in variable $?.

If you want to do something a little more complex (like a string) then the called script should echo the return value e.g.

echo $SOME_VARIABLE.

To use this value in the calling script:

RETURN_VAR=`called_script param1 10 20`

Notice the back quote(`). You are telling ksh to replace the results of the script into the variable i.e. what ever is echoed to stdout.

You could also use syntax like:

RETURN_VAR=$(called_script param1 10 20)

If you want to pass back several parameters then echo them as one string, using a delimiter to separate the values.
 

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LEARN ABOUT SUNOS

script

script(1)							   User Commands							 script(1)

NAME

       script - make record of a terminal session

SYNOPSIS

       script [-a] [filename]

DESCRIPTION

       The  script  utility  makes a record of everything printed on your screen. The record is written to filename. If no file name is given, the
       record is saved in the file typescript. See WARNINGS.

       The script command forks and creates a sub-shell, according to the value of $SHELL, and records the text from this session. The script ends
       when the forked shell exits or when Control-d is typed.

OPTIONS

       The following option is supported:

       -a	Appends the session record to filename, rather than overwriting it.

NOTES

       script places everything that appears on the screen in filename, including prompts.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+
       |CSI			     |Enabled			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       attributes(5)

WARNINGS

       script  can  pose  a  security risk when used in directories that are writable by other users (for example, /tmp), especially when run by a
       privileged user, that is, root. Be sure that typescript is not a link before running script.

SunOS 5.10							    30 Jan 2004 							 script(1)
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