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Full Discussion: problem with echo inserting single quotes
Top Forums Shell Programming and Scripting problem with echo inserting single quotes Post 302451587 by jelloir on Tuesday 7th of September 2010 09:47:36 AM
Old 09-07-2010
problem with echo inserting single quotes
Consider the following script:

Code:
#!/bin/bash

exclude='Archive PST,SystemState'

IFS=$","
rsyncExclusions=$(for exclude in ${exclude}; do echo -n -e --exclude=\"${exclude}\"\  ; done)
unset IFS

echo rsync $rsyncExclusions test
rsync -avh --delete --delete-excluded "$rsyncExclusions" /tmp/test1 /tmp/test2

When the script runs it fails to exclude the exclusions from $exclude. the output from bash shows that when it echoes the exclusions into the rsync line they appear to have single quotes around them which ruins rsync's interpretation of the excludes.

The echo of the variable appears fine.

Code:
$ bash -x /tmp/exclude 
+ exclude='Archive PST,SystemState'
+ IFS=,
++ for exclude in '${exclude}'
++ echo -n -e '--exclude="Archive PST" '
++ for exclude in '${exclude}'
++ echo -n -e '--exclude="SystemState" '
+ rsyncExclusions='--exclude="Archive PST" --exclude="SystemState" '
+ unset IFS
+ echo rsync '--exclude="Archive' 'PST"' '--exclude="SystemState"' test
rsync --exclude="Archive PST" --exclude="SystemState" test
+ rsync -avh --delete --delete-excluded '--exclude="Archive PST" --exclude="SystemState" ' /tmp/test1 /tmp/test2
sending incremental file list
test1/
test1/Archive PST/
test1/SystemState/

sent 98 bytes  received 24 bytes  244.00 bytes/sec
total size is 0  speedup is 0.00

How can I get the output of the exclusions to appear exactly how echoing the variable looks?
 

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LEARN ABOUT DEBIAN

pycallgraph

PYCALLGRAPH(1)							   User Commands						    PYCALLGRAPH(1)

NAME

       pycallgraph - command-line interface to pycallgraph

SYNOPSIS

       pycallgraph [OPTION]... pythonfile

DESCRIPTION

       This manual page documents pycallgraph.	This manual page was originally written for the Debian distribution.

       pycallgraph  is	a  program  that  creates  call  graphs  for  Python programs.	pycallgraph is the command line interface to pycallgraph's
       make_dot_graph method, which generates a call graph and stores it as an image in the specified image file.

       -o, --output-file

	      the file name of the output image. Default: pycallgraph.png

       -f, --image-format

	      the image format of imagefile. Default: png

       -q, --quiet

	      Suppress status output to the console.

       -t, --tool

	      the tool from GraphViz to use. Default: dot

       -s, --stdlib

	      include standard library functions in the trace. Default: False

       -i, --include

	      wildcard pattern of modules to include in the output. You can have multiple include arguments

       -e, --exclude

	      wildcard pattern of modules to exclude in the output. You can have multiple exclude arguments

       -d, --max-depth

	      maximum stack depth to trace

       --exclude-timing

	      wildcard pattern of modules to exclude in time measurement. You can have multiple exclude arguments

       --include-timing

	      wildcard pattern of modules to include in time measurement. You can have multiple include arguments

EXAMPLES

       Create a call graph called pycallgraph.png on myprogram.py:

	      pycallgraph ./myprogram.py

       Create a call graph of a standard Python installation script with command line parameters:

	      pycallgraph --output-file=setup.png -- setup.py --dry-run install

       Only see the module "distutils" within the execution of easy_install:

	      pycallgraph --include=distutils.* /usr/bin/easy_install

AUTHORS

       pycallgraph and pycallgraph were written by Gerald Kaszuba <pycallgraph@slowchop.com>.

       This manual page was originally written by Jan Alonzo <jmalonzo@unpluggable.com>, for the Debian GNU/Linux system.

pycallgraph version 0.5.1					    2008-07-08							    PYCALLGRAPH(1)
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