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+.TH RG 1 rg-VERSION
+.SH NAME
+rg \- generate random strings
+.SH SYNOPSIS
+.B rg
+.RB [ \-v ]
+.RB [ \-n
+.IR n ]
+.RB [ \-l
+.IR l ]
+.SH DESCRIPTION
+.B rg
+prints
+.I n
+cryptographically random strings of length
+.I l
+drawn from a configurable alphabet. Defaults match
+rg.veltar.systems:
+.I n
+= 6,
+.I l
+= 10, alphabet A–Z a–z 0–9.
+.P
+Bytes come from the OS CSPRNG
+.RI ( getrandom
+on Linux,
+.I rand_s
+on Windows). Incomplete last buckets of 2^32 are rejected so each
+symbol is equiprobable.
+.SH OPTIONS
+.TP
+.BI \-n " n"
+Number of strings. Default 6. Range 1..1000.
+.TP
+.BI \-l " l"
+Length of each string. Default 10. Range 1..256.
+.TP
+.B \-v
+Print version and exit.
+.SH CONFIGURATION
+The alphabet, defaults, and limits live in
+.IR config.h ,
+copied from
+.I config.def.h
+by
+.BR make .
+Edit
+.I config.def.h
+and rebuild. Do not edit
+.I rg.c
+for configuration.
+.SH SEE ALSO
+.IR getrandom (2)
+.SH AUTHORS
+See LICENSE for copyright details.