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rg - random string generator
============================
rg prints cryptographically random alphanumeric strings. It is a
suckless rewrite of rg.veltar.systems as a small C program that
builds on Linux and Windows.
rg [-v] [-n n] [-l l]
n number of strings (default 6, min 1, max 1000)
l length of each string (default 10, min 1, max 256)
Requirements
------------
A C99 compiler.
Linux: libc with getrandom(2) (glibc 2.25+).
Windows: a compiler with rand_s (MSVC, clang targeting MSVC, or
MinGW-w64).
Installation
------------
Edit config.mk to match your local setup. Edit config.def.h for the
alphabet and limits.
Linux:
make clean install
Windows (GNU make + clang, from this tree):
make
The Windows bits of config.mk are selected when OS=Windows_NT.
Otherwise set CC, EXE=.exe, and CPPFLAGS by hand as commented there.
Running without make
--------------------
cp config.def.h config.h
Linux:
cc -std=c99 -D_DEFAULT_SOURCE -o rg rg.c
Windows (clang / MSVC CRT):
clang -std=c99 -D_CRT_RAND_S -o rg.exe rg.c
Windows (MinGW-w64):
gcc -std=c99 -D_CRT_RAND_S -o rg.exe rg.c
Usage
-----
rg
rg -n 6 -l 10
rg -n 1 -l 32
Configuration
-------------
Copy config.def.h to config.h (make does this) and edit. Do not
edit rg.c for configuration.
Remarks
-------
The original page at rg.veltar.systems used n % alphabet.length on
raw 32-bit draws, which is slightly biased. This program rejects
values in the incomplete last bucket so each symbol is equiprobable.
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