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Full Discussion: Problem in using AND OR condition together
Top Forums Shell Programming and Scripting Problem in using AND OR condition together Post 302346468 by Franklin52 on Saturday 22nd of August 2009 06:40:51 AM
Old 08-22-2009
Quote:
Originally Posted by methyl
cfajohnson solution has shown that the parentheses in Frankin52's solution only clarified the command line.
IMHO the OP wants to test this condition (in C style):

Code:
if (( "a" == rhino || "b" == crocodile ) && "c" == testsc )

The order of the test statements is significant, in the examples above the parentheses doesn't matter, but check the output of these commands:

Code:
$ bash --version
GNU bash, version 3.1.17(1)-release (i486-pc-linux-gnu)
Copyright (C) 2005 Free Software Foundation, Inc.
$
$
$ if [ "a" = "b" ] && ([ "b" = "b" ] || [ "a" = "a" ]); then echo YES; fi
$
$ if [ "a" = "b" ] && [ "b" = "b" ] || [ "a" = "a" ]; then echo YES; fi
YES
$

 

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bashbug-64

BASHBUG(1)						      General Commands Manual							BASHBUG(1)

NAME

       bashbug - report a bug in bash

SYNOPSIS

       bashbug [--version] [--help] [email-address]

DESCRIPTION

       bashbug	is  a shell script to help the user compose and mail bug reports concerning bash in a standard format.	bashbug invokes the editor
       specified by the environment variable EDITOR on a temporary copy of the bug report format outline. The user must fill  in  the  appropriate
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       mailed, it is saved in the file dead.bashbug in the invoking user's home directory.

       The bug report format outline consists of several sections.  The first section provides information about the  machine,	operating  system,
       the  bash  version, and the compilation environment.  The second section should be filled in with a description of the bug.  The third sec-
       tion should be a description of how to reproduce the bug.  The optional fourth section is for a proposed fix.  Fixes are encouraged.

ENVIRONMENT

       bashbug will utilize the following environment variables if they exist:

       EDITOR Specifies the preferred editor. If EDITOR is not set, bashbug defaults to emacs.

       HOME   Directory in which the failed bug report is saved if the mail fails.

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SEE ALSO

       bash(1)

AUTHORS

       Brian Fox, Free Software Foundation
       bfox@gnu.org

       Chet Ramey, Case Western Reserve University
       chet@po.cwru.edu

GNU Bash-4.0							   1998 July 30 							BASHBUG(1)
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