README
1$OpenBSD: README,v 1.2 1996/06/23 14:19:58 deraadt Exp $
2$NetBSD: README,v 1.9 1995/03/21 09:04:33 cgd Exp $
3
4ed is an 8-bit-clean, POSIX-compliant line editor. It should work with
5any regular expression package that conforms to the POSIX interface
6standard, such as GNU regex(3).
7
8If reliable signals are supported (e.g., POSIX sigaction(2)), it should
9compile with little trouble. Otherwise, the macros SPL1() and SPL0()
10should be redefined to disable interrupts.
11
12The following compiler directives are recognized:
13DES - to add encryption support (requires crypt(3))
14NO_REALLOC_NULL - if realloc(3) does not accept a NULL pointer
15BACKWARDS - for backwards compatibility
16NEED_INSQUE - if insque(3) is missing
17
18The file `POSIX' describes extensions to and deviations from the POSIX
19standard.
20
21The ./test directory contains regression tests for ed. The README
22file in that directory explains how to run these.
23
24For a description of the ed algorithm, see Kernighan and Plauger's book
25"Software Tools in Pascal," Addison-Wesley, 1981.
26