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Full Discussion: backslash issues
Top Forums UNIX for Dummies Questions & Answers backslash issues Post 53224 by Bab00shka on Thursday 8th of July 2004 11:53:31 AM
Old 07-08-2004
backslash issues
Hi,

I have a script which looks through an input file and takes data from the file to use within the script.

Everything works fine until the script reads the item \windows\directory\structure\ from the input file into a variable.

As unix sees the backslash as an escape character, the variable, when echoed shows windowsdirectorystructure when the literal \windows\directory\structure\ is required.

I tried excaping the escape characters in the input file so that the variable included them, ie putting \\windows\\directory\\structure\\ into the input file. This came back with the same incorrect result too. I also tried \\\windows\\\directory\\\structure\\\ just in case the shell interpreted the variable another time but this showed the same result too.

I also tried using '\windows\directory\structure\' including single quotes in the input file but the variable literally is '\windows\directory\structure\' including single quotes.

If I try assigning the variable on the command line rather than from within the script, I get the desired result. ie

var='\windows\directory\structure\'
echo $var
\windows\directory\structure\

Does anyone have any advice on how I can get the variable in the script to equal \windows\directory\structure\ ?

Many thanks
Helen
 

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LEARN ABOUT OPENDARWIN

tcl_allowexceptions

Tcl_AllowExceptions(3)					      Tcl Library Procedures					    Tcl_AllowExceptions(3)

__________________________________________________________________________________________________________________________________________________

NAME

       Tcl_AllowExceptions - allow all exceptions in next script evaluation

SYNOPSIS

       #include <tcl.h>

       Tcl_AllowExceptions(interp)

ARGUMENTS

       Tcl_Interp   *interp	 (in)	   Interpreter in which script will be evaluated.
_________________________________________________________________

DESCRIPTION

       If  a  script is evaluated at top-level (i.e. no other scripts are pending evaluation when the script is invoked), and if the script termi-
       nates with a completion code other than TCL_OK, TCL_ERROR or TCL_RETURN, then Tcl normally converts this into a TCL_ERROR  return  with	an
       appropriate  message.  The particular script evaluation procedures of Tcl that act in the manner are Tcl_EvalObjEx, Tcl_EvalObjv, Tcl_Eval,
       Tcl_EvalEx, Tcl_GlobalEval, Tcl_GlobalEvalObj, Tcl_VarEval and Tcl_VarEvalVA.

       However, if Tcl_AllowExceptions is invoked immediately before calling one of those a procedures, then arbitrary completion codes  are  per-
       mitted from the script, and they are returned without modification.  This is useful in cases where the caller can deal with exceptions such
       as TCL_BREAK or TCL_CONTINUE in a meaningful way.

KEYWORDS

       continue, break, exception, interpreter

Tcl									7.4						    Tcl_AllowExceptions(3)
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