![]() ![]() If the leading character is a single-quote or double-quote, the value shall be the numeric value in the underlying codeset of the character following the single-quote or double-quote. See the POSIX specification for printf where it says: The single quote in the last argument to the printf in the loop causes the character to be output as its numeric value ("A" is output as "65"). The read gets a single byte ( -n 1) from /dev/urandom in the range 0 to 255 ( 00 to FF). The newline is superfluous here and could be omitted. The format specifier -x\n causes the output to be a literal hyphen followed by a two-digit hexadecimal number including a leading zero, if appropriate. r allows \ (and should almost always be used by habit with read) IFS= - disables interpretation of \t (tab), \n (newline) and space Note that the python version only uses a 16 wide field to generate a hex char, so you don't have to worry about zero padding - approach amended to address a comment. easily remediedm but that's an exercise for you #note: does not generate a leading zero on single character sections. #use a command line tool to change int to hex(bc is pretty standard) Add the dashes between three randomly generated chunks.Generate an appropriately sized int like so:.This results in a random number between 0 and 255. ![]()
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