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Top Forums Shell Programming and Scripting Replace special characters with backslash and character Post 302926513 by Chubler_XL on Monday 24th of November 2014 11:30:38 PM
Old 11-25-2014
depends on what you define as special.

This will escape any non-alphanum,hyphen or underscore:

Code:
$ echo 'qwerty123@!,' | sed 's/[^[:alnum:]_-]/\\&/g'
qwerty123\@\!\,

This User Gave Thanks to Chubler_XL For This Post:
 

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Tcl_Backslash(3)					      Tcl Library Procedures						  Tcl_Backslash(3)

__________________________________________________________________________________________________________________________________________________

NAME
Tcl_Backslash - parse a backslash sequence SYNOPSIS
#include <tcl.h> char Tcl_Backslash(src, countPtr) ARGUMENTS
char *src (in) Pointer to a string starting with a backslash. int *countPtr (out) If countPtr isn't NULL, *countPtr gets filled in with number of characters in the backslash sequence, includ- ing the backslash character. _________________________________________________________________ DESCRIPTION
The use of Tcl_Backslash is deprecated in favor of Tcl_UtfBackslash. | This is a utility procedure provided for backwards compatibility with non-internationalized Tcl extensions. It parses a backslash sequence | and returns the low byte of the Unicode character corresponding to the sequence. Tcl_Backslash modifies *countPtr to contain the number of characters in the backslash sequence. See the Tcl manual entry for information on the valid backslash sequences. All of the sequences described in the Tcl manual entry are sup- ported by Tcl_Backslash. SEE ALSO
| Tcl(n), Tcl_UtfBackslash(3) KEYWORDS
backslash, parse Tcl 8.1 Tcl_Backslash(3)
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