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Full Discussion: Using variable in sed
Operating Systems OS X (Apple) Using variable in sed Post 302771527 by bakunin on Thursday 21st of February 2013 01:07:27 AM
Old 02-21-2013
Quote:
Originally Posted by mattiasvdm
I thought something like this:
Code:
command=somecommand3

sed -ie '/#End/i\
"$command"\
' /location/of/somescript.sh

But this just adds "$command".
The reason is that inside a single-quoted string double-quoting has no effect. From the POV of the shell, though, you are inside a single-quoted string. This should work:

Code:
sed -ie '/#End/i\
'"$command"'\
' /location/of/somescript.sh

Note that the single-quoted string ends, then a double-quoted string starts and when this ends another single-quoted string starts. This may look cumbersome, but it is the only way to ensure the sed-command will not break if "$command" contains whitespace.

I hope this helps.

bakunin
 

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LEARN ABOUT MOJAVE

page_util_quote

page_util_quote(n)					      Parser generator tools						page_util_quote(n)

__________________________________________________________________________________________________________________________________________________

NAME

       page_util_quote - page character quoting utilities

SYNOPSIS

       package require page::util::quote  ?0.1?

       package require snit

       ::page::util::quote::unquote char

       ::page::util::quote::quote'tcl char

       ::page::util::quote::quote'tclstr char

       ::page::util::quote::quote'tclcom char

_________________________________________________________________

DESCRIPTION

       This package provides a few utility commands to convert characters into various forms.

API

       ::page::util::quote::unquote char
	      A  character,  as stored in an abstract syntax tree by a PEG processor (See the packages grammar::peg::interpreter, grammar::me, and
	      their relations), i.e. in some quoted form, is converted into the equivalent Tcl character. The character is returned as the  result
	      of the command.

       ::page::util::quote::quote'tcl char
	      This command takes a Tcl character (internal representation) and converts it into a string which is accepted by the Tcl parser, will
	      regenerate the character in question and is 7bit ASCII. The string is returned as the result of this command.

       ::page::util::quote::quote'tclstr char
	      This command takes a Tcl character (internal representation) and converts it into a string which is accepted by the Tcl  parser  and
	      will generate a human readable representation of the character in question.  The string is returned as the result of this command.

	      The  string  does not use any unprintable characters. It may use backslash-quoting. High UTF characters are quoted to avoid problems
	      with the still prevalent ascii terminals. It is assumed that the string will be used in a double-quoted environment.

       ::page::util::quote::quote'tclcom char
	      This command takes a Tcl character (internal representation) and converts it into a string which is accepted by the Tcl parser  when
	      used within a Tcl comment. The string is returned as the result of this command.

BUGS, IDEAS, FEEDBACK
       This  document,	will  undoubtedly  contain  bugs  and  other  problems.  Please report such in the category page of the Tcllib SF Trackers
       [http://sourceforge.net/tracker/?group_id=12883].  Please also report any ideas for enhancements you may have.

KEYWORDS

       page, parser generator, quoting, text processing

CATEGORY

       Page Parser Generator

COPYRIGHT

       Copyright (c) 2007 Andreas Kupries <andreas_kupries@users.sourceforge.net>

page									1.0							page_util_quote(n)
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