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Full Discussion: Problem running var (with spaces) as command
Top Forums Shell Programming and Scripting Problem running var (with spaces) as command Post 302409588 by alister on Thursday 1st of April 2010 03:13:00 PM
Old 04-01-2010
Quote:
Originally Posted by bbw
Is there any set of escapes / quoting that will get bash to keep the MYVAR contents together when I run it? I'd prefer not to use eval, since I'm passing my CMD to a function in another script I don't control.
No. If you double quote CMD then it will expand to one token and the shell will start looking for a command to execute whose name is the entire string, spaces and all. So, you cannot double quote $CMD when you invoke it. Without the double quotes, the results of the expansion will undergo field splitting, and quotes within the expansion are not special so they cannot be used to affect the field splitting step.

(Assuming a typical posix-like shell) Your only option is eval. Without it, what you are trying to do is impossible.
Code:
CMD='eval export MVAR="1 2 3"'

Regards,
Alister
 

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LEARN ABOUT OSX

texi2dvi

TEXI2DVI(1)							   User Commands						       TEXI2DVI(1)

NAME

       texi2dvi - print Texinfo documents

SYNOPSIS

       texi2dvi [OPTION]... FILE...

DESCRIPTION

       Run each Texinfo or LaTeX FILE through TeX in turn until all cross-references are resolved, building all indices.  The directory containing
       each FILE is searched for included files.  The suffix of FILE is used to determine its language (LaTeX or Texinfo).

       Makeinfo is used to perform Texinfo macro expansion before running TeX when needed.

   Operation modes:
       -b, --batch
	      no interaction

       -c, --clean
	      remove all auxiliary files

       -D, --debug
	      turn on shell debugging (set -x)

       -h, --help
	      display this help and exit successfully

       -o, --output=OFILE
	      leave output in OFILE (implies --clean); Only one input FILE may be specified in this case

       -q, --quiet
	      no output unless errors (implies --batch)

       -s, --silent
	      same as --quiet

       -v, --version
	      display version information and exit successfully

       -V, --verbose
	      report on what is done

   TeX tuning:
       -@     use @input instead of input; for preloaded Texinfo

       -e, -E, --expand
	      force macro expansion using makeinfo

       -I DIR search DIR for Texinfo files

       -l, --language=LANG
	      specify the LANG of FILE (LaTeX or Texinfo)

       -p, --pdf
	      use pdftex or pdflatex for processing

       -r, --recode
	      call recode before TeX to translate input characters

       -t, --command=CMD
	      insert CMD in copy of input file

       or --texinfo=CMD
	      multiple values accumulate

       The values of the BIBTEX, LATEX (or PDFLATEX), MAKEINDEX, MAKEINFO, TEX (or PDFTEX), TEXINDEX, and THUMBPDF environment variables are  used
       to run those commands, if they are set.	Any CMD strings are added after @setfilename for Texinfo input, in the first line for LaTeX input.

REPORTING BUGS

       Email   bug   reports   to  <bug-texinfo@gnu.org>,  general  questions  and  discussion	to  <help-texinfo@gnu.org>.   Texinfo  home  page:
       http://www.gnu.org/software/texinfo/

COPYRIGHT

       Copyright (C) 2004 Free Software Foundation, Inc.  There is NO warranty.  You may redistribute this software under the  terms  of  the  GNU
       General Public License.	For more information about these matters, see the files named COPYING.

SEE ALSO

       The  full  documentation  for texi2dvi is maintained as a Texinfo manual.  If the info and texi2dvi programs are properly installed at your
       site, the command

	      info texi2dvi

       should give you access to the complete manual.

texi2dvi 1.34							   December 2004						       TEXI2DVI(1)
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