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Full Discussion: Changing variables in a loop
Top Forums Shell Programming and Scripting Changing variables in a loop Post 302293716 by cfajohnson on Tuesday 3rd of March 2009 05:04:49 PM
Old 03-03-2009
Quote:
Originally Posted by kaltekar
I don't quite understand. How does this replace the null value in testResponseB without resetting testResponseA of testResponseC?

Read the Parameter Expansion section of the bash man page:

Code:
   ${parameter:=word}
       Assign Default Values. If parameter is unset or null,
       the expansion of word is assigned to parameter. The
       value of parameter is then substituted. Positional
       parameters and special parameters may not be assigned to
       in this way.


Last edited by vgersh99; 03-03-2009 at 06:26 PM.. Reason: fixed BB Code
 

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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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