random

random is a small command-line utility that outputs a random integer uniformly distributed in a specified range. For more information, see the manual.

Compiling

To build random, you need the following on your system.

• CMake
• A compiler that supports C99.
• The GMP library.
• AsciiDoc

Populate the submodule directories with git submodule update --init, then invoke cmake [...] <srcdir> to generate build files for your system.

Examples

Decimal number in [0, 100):

$ random 100
73

Binary 32-bit word:

$ random -b 2 -s 32
10000111111001111000100101010010

256-bit hexadecimal number from /dev/random:

$ random -b 16 -s 256 -r
753a4c5e2db2057b1eeadadfb00c7f42d56395467e8f45166059f583f219e7e8