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Full Discussion: Bash shell adding extra single quotes
Top Forums Shell Programming and Scripting Bash shell adding extra single quotes Post 302670821 by hpodhrad on Thursday 12th of July 2012 01:21:05 PM
Old 07-12-2012
Bash shell adding extra single quotes
AIX 6.1
bash shell

Code:
#!/bin/bash -x
STATEMENT="cvs commit -m \"This is\" ../PBP/EIR.ENTRY"
echo $STATEMENT
exit 0

This is the output
+ STATEMENT='cvs commit -m "This is" ../PBP/EIR.ENTRY'
+ echo cvs commit -m '"This' 'is"' ../PBP/EIR.ENTRY
cvs commit -m "This is" ../PBP/EIR.ENTRY
+ exit 0

Problem: Notice the single quotes between "This" and "is" ... This causes the called program "cvs" to think those are separate parameters which they are not.

If I change the shell to this
Code:
#!/bin/bash -x
STATEMENT="cvs commit -m \"This is\" ../PBP/EIR.ENTRY"
echo $STATEMENT
$STATEMENT
exit 0

Then this is the ouput

+ STATEMENT='cvs commit -m "This is" ../PBP/EIR.ENTRY'
+ echo cvs commit -m '"This' 'is"' ../PBP/EIR.ENTRY
cvs commit -m "This is" ../PBP/EIR.ENTRY
+ cvs commit -m '"This' 'is"' ../PBP/EIR.ENTRY
cvs commit: nothing known about `is"'
cvs [commit aborted]: correct above errors first!
+ exit 0

Please do not pass this off as a "cvs" problem. It is not. If I change the script to this
Code:
#!/bin/bash -x
STATEMENT="cvs commit -m \"Thisis\" ../PBP/EIR.ENTRY"
echo $STATEMENT
$STATEMENT
exit 0

Then this is the output
+ STATEMENT='cvs commit -m "Thisis" ../PBP/EIR.ENTRY'
+ echo cvs commit -m '"Thisis"' ../PBP/EIR.ENTRY
cvs commit -m "Thisis" ../PBP/EIR.ENTRY
+ cvs commit -m '"Thisis"' ../PBP/EIR.ENTRY
+ exit 0

How do I get bash to ignore that space?
Last edited by joeyg; 07-12-2012 at 03:31 PM.. Reason: Please wrap data and sripts with CodeTags
 

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LEARN ABOUT CENTOS

bashbug

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
       fields  and  exit  the  editor.	 bashbug  then	mails the completed report to bug-bash@gnu.org, or email-address.  If the report cannot be
       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.

       TMPDIR Directory in which to create temporary files and directories.

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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