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Top Forums Shell Programming and Scripting Strip leading and trailing spaces only in a shell variable with embedded spaces Post 65567 by jerardfjay on Monday 7th of March 2005 10:14:17 AM
Old 03-07-2005
Bug Strip leading and trailing spaces only in a shell variable with embedded spaces

I am trying to strip all leading and trailing spaces of a shell variable using either awk or sed or any other utility, however unscuccessful and need your help.

echo $SH_VAR | command_line Syntax.

The SH_VAR contains embedded spaces which needs to be preserved. I need only for the leading and trailing spaces to be removed. If anyone has accomplished this before or knows a quick way to achieve this result please let me know

Thnx Smilie
 

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Tcl_Concat(3)						      Tcl Library Procedures						     Tcl_Concat(3)

__________________________________________________________________________________________________________________________________________________

NAME
Tcl_Concat - concatenate a collection of strings SYNOPSIS
#include <tcl.h> const char * Tcl_Concat(argc, argv) ARGUMENTS
int argc (in) Number of strings. const char *const argv[] (in) Array of strings to concatenate. Must have argc entries. _________________________________________________________________ DESCRIPTION
Tcl_Concat is a utility procedure used by several of the Tcl commands. Given a collection of strings, it concatenates them together into a single string, with the original strings separated by spaces. This procedure behaves differently than Tcl_Merge, in that the arguments are simply concatenated: no effort is made to ensure proper list structure. However, in most common usage the arguments will all be proper lists themselves; if this is true, then the result will also have proper list structure. Tcl_Concat eliminates leading and trailing white space as it copies strings from argv to the result. If an element of argv consists of nothing but white space, then that string is ignored entirely. This white-space removal was added to make the output of the concat command cleaner-looking. The result string is dynamically allocated using Tcl_Alloc; the caller must eventually release the space by calling Tcl_Free. SEE ALSO
Tcl_ConcatObj KEYWORDS
concatenate, strings Tcl 7.5 Tcl_Concat(3)
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