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Top Forums Shell Programming and Scripting Get variables from expression Post 302901558 by rbatte1 on Wednesday 14th of May 2014 10:13:54 AM
Old 05-14-2014
Here are some more expressions SmilieSmilieSmilieSmilieSmilieSmilieSmilieSmilieSmilieSmilieSmilie

Are you saying that the people setting up their customised variables will be doing so free-form? I would be concerned that they will not process. What are you writing in and what would you expect to write in?

Would you expect to be able to recognise and process UsrAppNO=(UsrCustGBLNo*2) + UsrCustRegNo + 99 or could you set the rules? In ksh (like my example) this could be written as:-
Code:
((UsrAppNO=$UsrCustGBLNo*2)+$UsrCustRegNo+99))

Setting up a quick test, I got this:-
Code:
# UsrCustGBLNo=5
RBATTE1> UsrCustRegNo=10
RBATTE1> ((UsrAppNO=($UsrCustGBLNo*2)+$UsrCustRegNo+99))
RBATTE1> echo $UsrAppNO
119
RBATTE1>


Does that help?
Robin
 

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ATF-SH(1)						    BSD General Commands Manual 						 ATF-SH(1)

NAME
atf-sh [-s shell] -- interpreter for shell-based test programs SYNOPSIS
atf-sh script DESCRIPTION
atf-sh is an interpreter that runs the test program given in script after loading the atf-sh(3) library. atf-sh is not a real interpreter though: it is just a wrapper around the system-wide shell defined by ATF_SHELL. atf-sh executes the inter- preter, loads the atf-sh(3) library and then runs the script. You must consider atf-sh to be a POSIX shell by default and thus should not use any non-standard extensions. The following options are available: -s shell Specifies the shell to use instead of the value provided by ATF_SHELL. ENVIRONMENT
ATF_LIBEXECDIR Overrides the builtin directory where atf-sh is located. Should not be overridden other than for testing purposes. ATF_PKGDATADIR Overrides the builtin directory where libatf-sh.subr is located. Should not be overridden other than for testing purposes. ATF_SHELL Path to the system shell to be used in the generated scripts. Scripts must not rely on this variable being set to select a specific interpreter. EXAMPLES
Scripts using atf-sh(3) should start with: #! /usr/bin/env atf-sh Alternatively, if you want to explicitly choose a shell interpreter, you cannot rely on env(1) to find atf-sh. Instead, you have to hardcode the path to atf-sh in the script and then use the -s option afterwards as a single parameter: #! /path/to/bin/atf-sh -s/bin/bash ENVIRONMENT
ATF_SHELL Path to the system shell to be used in the generated scripts. SEE ALSO
atf-sh(3) BSD
September 27, 2014 BSD
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