08-30-2013
There is a wealth of possibilities, between the readline options, stty raw, and IFS, but so many tools do not deal with null, it's hard to even test. If you bash "read =n 1" a null into a variable, is it hard to tell the variable is the empty string '' or ""?
To write it out, one might use the printf character option, treating it as a special case and providing the null as a zero char (int) value. Once you get to treating it as a special case, you can write it with something like "echo '\0\c' ".
$IFS characters are another challenge, but if you use "read -n 1" you could do your own $IFS processing if any, setting $IFS to '' or unsetting it.
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LEARN ABOUT LINUX
strncpy
STRCPY(3) Linux Programmer's Manual STRCPY(3)
NAME
strcpy, strncpy - copy a string
SYNOPSIS
#include <string.h>
char *strcpy(char *dest, const char *src);
char *strncpy(char *dest, const char *src, size_t n);
DESCRIPTION
The strcpy() function copies the string pointed to by src, including the terminating null byte ('