1$OpenBSD: README,v 1.3 2014/02/24 13:28:40 millert 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)) 14BACKWARDS - for backwards compatibility 15 16The file `POSIX' describes extensions to and deviations from the POSIX 17standard. 18 19The ./test directory contains regression tests for ed. The README 20file in that directory explains how to run these. 21 22For a description of the ed algorithm, see Kernighan and Plauger's book 23"Software Tools in Pascal," Addison-Wesley, 1981. 24