Fix misuse of arc4random by using arc4random_uniform.
Noticed by riastradh.

branches: 1.21.24; 1.21.28;
Use __dead

fix sign-compare issue

branches: 1.19.26;
More programs using efun.

Mike Cheponis noted that I didn't list the edition of Knuth that the
page number refers to. Fixed.

use arc4random

Teach getopt about the new -0 option. Noted by Jeff Ito in PR 25621.

branches: 1.15.2;
Homogenize usage messages: make the 'usage' word all lowercase, as this seems
to be the most common practice in our tree.

make -0 actually work

Add -0 option.

clear errno before strto(u)l() if we're going to test it for ERANGE afterwards

Include <limits.h> for LONG_MIN/LONG_MAX.
Put kernel include file first, as per KNF.

new KNF style function declarations

Power of 2 realloc.

convert to use getprogname()

Add missing newline in usage string.

This trivial and computationally useless pointer initialization makes
gcc 2.7.2.2 happy on m68k again.

Small bug fix from Soren S. Jorvang (soren@t.dk)

Must cast size_t to long and use %ld to print.

- argument error detection
- long line support
- argument change [-f <fname>] instead of [-c <args>]
- conditional prototypes

make compile with warnings on.

Add shuffle, a small program for producing permutations.
Note that is still a little cleanup to be done, but I thought it was
the right point to commit.